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WO2025128457A1 - Tête de rasoir et lame s'y rapportant - Google Patents

Tête de rasoir et lame s'y rapportant Download PDF

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Publication number
WO2025128457A1
WO2025128457A1 PCT/US2024/059123 US2024059123W WO2025128457A1 WO 2025128457 A1 WO2025128457 A1 WO 2025128457A1 US 2024059123 W US2024059123 W US 2024059123W WO 2025128457 A1 WO2025128457 A1 WO 2025128457A1
Authority
WO
WIPO (PCT)
Prior art keywords
blade
notch
region
razor
cartridge
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/US2024/059123
Other languages
English (en)
Inventor
Stephan Fischer
William Salvatore, Jr.
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Edgewell Personal Care Brands LLC
Original Assignee
Edgewell Personal Care Brands LLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Edgewell Personal Care Brands LLC filed Critical Edgewell Personal Care Brands LLC
Publication of WO2025128457A1 publication Critical patent/WO2025128457A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
    • B26B21/00—Razors of the open or knife type; Safety razors or other shaving implements of the planing type; Hair-trimming devices involving a razor-blade; Equipment therefor
    • B26B21/40—Details or accessories
    • B26B21/4012—Housing details, e.g. for cartridges
    • B26B21/4031—Housing details, e.g. for cartridges characterised by special geometric shaving parameters, e.g. blade span or exposure

Definitions

  • Razor Cartridge and Blade Therefor BACKGROUND OF THE INVENTION
  • This application claims priority to U.S. Patent Application Ser. No.63/608,631, filed on December 11, 2023, which is incorporated by reference in its entirety herein.
  • This disclosure relates generally to razors and implements for reducing the length of hair, and more particularly, razors, cartridges and blades related thereto.
  • Background Information [0002] Razors of the wet shave or manual type include a cartridge and a handle that are connected together. Razors are generally intended to reduce the length of hair extending from the hirsute surface, but beyond this general purpose, razors vary to suit the different needs of different end consumers.
  • a razor blade (also a “blade”) is provided.
  • the razor blade includes a forward region.
  • the forward region has a cutting edge.
  • the blade includes a middle region located adjacent the forward region and opposite to the cutting edge.
  • the blade includes a support region located adjacent the middle region.
  • the support region has an upper portion that is generally opposite to a lower portion.
  • the lower portion defines a lowermost edge that is generally opposite to the cutting edge.
  • the cutting edge is angled with respect to the lowermost edge.
  • the support region includes at least one notch and up to fourteen notches.
  • the razor blade comprises between three and nine notches.
  • the razor blade comprises between five and seven notches.
  • at least one notch includes several slots forming a comb-like shape.
  • at least two notches each include several slots forming a comb-like shape.
  • Such notches having slots forming a comb-like shape are on either side of a centermost notch.
  • the slots are connected to a bridge portion adjacent the lowermost edge.
  • the bridge portion optionally has a thickness that is greater than the thickness of the flange of the centermost notch.
  • the bridge portion optionally has a bridge thickness that is about equal to or greater than the thickness of the flange of the centermost notch.
  • the bridge portion optionally has a bridge thickness that is less than or equal to the thickness of the flange of the centermost notch.
  • the at least one notch is contiguous with the lowermost edge. In some embodiments, at least three notches are contiguous with the lowermost edge. In some embodiments, all of the notches are contiguous with the lowermost edge.
  • the at least one notch includes a centermost notch. In some embodiments, the at least one notch also includes at least two notches on each respective side of the centermost notch. In some embodiments, each of the at least two notches on each respective side of the centermost notch is a mid-lateral notch.
  • the centermost notch and two additional notches each include at least one flange.
  • the centermost notch includes two flanges, and a respective notch on either side of the centermost notch includes at least one flange.
  • each of the respective notches on either side of the centermost notch include one flange.
  • the single flange on the notch to a side of the centermost notch is configured on the proximal side of such notch to the centermost notch.
  • the single flange on the notch to a side of the centermost notch is configured on the distal side of such notch to the centermost notch.
  • the centermost notch is configured to have a geometry that is distinct from the geometry of the remaining notches.
  • the centermost notch comprises at least one flange, the at least one flange extending inwardly creating a narrow width of the centermost notch.
  • the at least one notch is located in the support region of the blade.
  • the at least three notches are located in the support region of the blade.
  • all of the notches are located in the support region of the blade.
  • all of the notches are entirely within the support region of the blade.
  • the at least one notch is located solely in the lower portion.
  • a ratio of a surface area with notches to a surface area of the support region without the notches is between about 0.1% to about 50%.
  • the ratio of the surface area with notches to a surface area of the lower portion of the support region without the notches is between about 0.1% to about 50%.
  • a notch separation length between each of the at least one notches is generally equal.
  • an end length between an end of the razor blade and the endmost notch is greater than or equal to the notch separation length between each of the at least one notches.
  • the blade is a bent blade.
  • the blade has a bend in the middle region, the bend having a bend angle defined between the cutting edge and the lowermost edge of between about 90 degrees and about 130 degrees. In some embodiments, the bend angle is between about 100 degrees and about 125 degrees.
  • a razor cartridge is provided.
  • the razor cartridge includes a guard, a cap, at least one blade and up to eight blades positioned between the guard and the cap.
  • Each of the blades includes a forward region.
  • the forward region has a cutting edge.
  • Each blade includes a middle region located adjacent the forward region and opposite to the cutting edge.
  • Each blade includes a support region located adjacent the middle region.
  • the support region having an upper portion that is generally opposite to a lower portion.
  • the lower portion defines a lowermost edge that is generally opposite to the cutting edge.
  • the cutting edge is angled with respect to the lowermost edge.
  • the support region of a blade includes at least one notch and up to fourteen notches.
  • the blade comprises between three and nine notches.
  • each of the at least two notches on each respective side of the centermost notch is a mid-lateral notch.
  • the centermost notch and two additional notches each include at least one flange.
  • the centermost notch includes two flanges, and a respective notch on either side of the centermost notch includes at least one flange.
  • each of the respective notches on either side of the centermost notch include one flange.
  • the single flange on the notch to a side of the centermost notch is configured on the proximal side of such notch to the centermost notch.
  • the single flange on the notch to a side of the centermost notch is configured on the distal side of such notch to the centermost notch.
  • a center region of the at least one blade bends (e.g., deflects or projects) at least about 0.4 mm when a 3 N load is applied to the center portion of the at least one blade.
  • a center region of the at least one blade bends (e.g., deflects or projects) at most about 0.5 mm when a 3 N load is applied to the center portion of the at least one blade.
  • a center region of the at least one blade bends (e.g., deflects or projects) at least about 0.4 mm and at most about 0.5 mm when a 3 N load is applied to the center portion of the at least one blade.
  • the guard bends (e.g., deflects or projects) between about 0.4 mm and about 0.5 mm.
  • a ratio of a surface area with notches to a surface area of the support region without the notches is between about 0.1% to about 50%.
  • the razor cartridge includes a cartridge housing.
  • the cartridge housing includes at least one pair of blade supports.
  • the at least one pair of blade supports is located at each of the end regions of the cartridge housing. Each of the at least one pair of blade supports includes opposing protrusions defining a channel therein. [00028] In some embodiments, the at least one pair of blade supports is attached to or is integral with the housing, (e.g., the frame). In some embodiments, the at least one pair of blade supports is attached to or integral with the housing (e.g., the inlay). [00029] In some embodiments, the at least one pair of blade supports are located in a lateral end region, a mid-lateral region, and/or a center region of the cartridge. In some embodiments, a pair of blade supports is located in an end region and a center region of the cartridge.
  • a pair of blade supports are located in a mid-lateral region and a center region of the cartridge. In some embodiments, a pair of blade supports are located in a lateral end region, a mid-lateral region, and a center region. [00030] In some embodiments, there are at least three sets of the at least one pair of blade supports, or three sets of the at least one pair of blade supports, or five sets of the at least one pair of blade supports, where a set is provided for each blade in a multi-blade cartridge having a respective pair of blade supports (e.g., an array of pairs of blade supports). [00031] According to any of the embodiments herein, the razor cartridge includes at least one protrusion.
  • the at least one protrusion is inward of the at least one pair of blade supports.
  • the at least one protrusion is optionally located in the center region of the cartridge housing.
  • the at least one protrusion is optionally located in the mid-lateral region of the cartridge.
  • the at least one protrusion includes at least one ledge.
  • a protrusion includes two ledges, each ledge extending laterally outward of a respective side of the protrusion,
  • a protrusion includes a ledge extending laterally outward of a side of the protrusion.
  • the ledge extends towards the center region.
  • the ledge extends laterally towards the lateral end region.
  • At least one pair of blade supports and a protrusion are provided in a given region of the cartridge housing (e.g., the inlay) in the center region and/or the mid-lateral region.
  • a protrusion and a pair of blade supports are provided in the center region.
  • a protrusion and a pair of blade supports are provided in the mid-lateral region.
  • the protrusion is centered between the pair of blade supports such that the protrusion is within a channel defined between the pair of blade supports.
  • the protrusion is configured such that it does not occupy the entire volume of the channel (e.g., defined as the space between the pair of blade supports). [00034] In some embodiments, the protrusion is laterally outward or laterally inward (e.g., adjacent to) a respective pair of blade supports. In some embodiments, the protrusion extends upwardly from, is laterally outward of, or is laterally inward of a structure (e.g., a rail) of the housing (e.g., the inlay) to which a series of protrusions are attached.
  • a structure e.g., a rail
  • the housing e.g., the inlay
  • the rail is configured to extend between the front region (e.g., proximal the guard) of the housing and the aft region (e.g., proximal the cap) of the housing.
  • at least one rail is located in the mid-lateral region, and/or the center region.
  • the height of the rail is greater than or equal to the heigh of the protrusion.
  • the at least one pair of blade supports and the at least one protrusion extend upwardly from a base portion of the cartridge housing and towards the skin engaging surface.
  • the cartridge housing includes an inlay.
  • the cartridge housing includes a frame.
  • the inlay is configured to attach to the frame.
  • the inlay is a flexible material such as a thermoplastic material.
  • the thermoplastic material is a thermoplastic elastomeric material (e.g., TPE).
  • the at least one protrusion extends upwardly from the housing (e.g., an inlay).
  • a first protrusion is located in the center region, and a second protrusion and a third protrusion are located in the mid-lateral region of the cartridge (e.g., mid-lateral protrusions), each of the second protrusion and the third protrusion (e.g., mid-lateral protrusions) laterally outward on a respective side of the central protrusion.
  • the at least one protrusion is positioned within the at least one notch.
  • at least two protrusions are positioned within at least two respective notches.
  • each of the at least two respective protrusions and the at least two respective notches are within the mid-lateral region and/or the center region.
  • at least three protrusions are positioned within at least three respective notches.
  • Each of the at least three respective protrusions and the at least three respective notches are within the mid-lateral region and/or the center region.
  • at least one set of notches are positioned within at least one set of notches, where each respective notch is within a respective blade of a multi-blade cartridge.
  • at least two sets of notches are positioned within at least two sets of notches, where two respective notches are within two respective blades of a multi-blade cartridge.
  • At least three sets of notches are positioned within at least three sets of notches, where three respective notches are within three respective blades of a multi-blade cartridge. In such embodiments having multiple sets of notches, there is an array of notches.
  • a further embodiment of the present disclosure is provided and includes a razor cartridge.
  • the razor cartridge includes at least one pair of blade supports. Each of the at least one pair of blade supports is located at an end region of the cartridge housing. Each of the at least one pair of blade supports includes opposing protrusions defining a channel therein.
  • the at least one pair of blade supports is attached to or is integral with the housing, and optionally the frame.
  • the at least one pair of blade supports is attached to or integral with the housing and optionally the inlay.
  • the at least one pair of blade supports are located in a lateral end region, a mid-lateral region, and/or a center region of the cartridge.
  • a pair of blade supports is located in an end region and a center region of the cartridge.
  • a pair of blade supports are located in a mid-lateral region and a center region of the cartridge.
  • a pair of blade supports are located in a lateral end region, a mid-lateral region, and a center region.
  • the razor cartridge includes at least one protrusion inward of the at least one pair of blade supports.
  • the at least one protrusion is optionally located in the center region of the cartridge housing.
  • the at least one protrusion is optionally located in the mid-lateral region of the cartridge housing (e.g., the inlay).
  • the at least one protrusion is optionally located in the mid-lateral region and the center region of the cartridge housing (e.g., the inlay).
  • the at least one protrusion includes at least one ledge.
  • a protrusion includes two ledges, each ledge extending laterally outward of a respective side of the protrusion,
  • a protrusion includes a ledge extending laterally outward of a side of the protrusion.
  • the ledge extends towards the center region.
  • the ledge extends laterally towards the lateral end region.
  • At least one pair of blade supports and a protrusion are provided in a given region of the cartridge housing (e.g., the inlay) in the center region and/or the mid-lateral region.
  • a protrusion and a pair of blade supports are provided in the center region.
  • a protrusion and a pair of blade supports are provided in the mid-lateral region.
  • the protrusion is centered between the pair of blade supports such that the protrusion is within a channel defined between the pair of blade supports.
  • the structure (e.g., a rail) is configured to extend between the front region (e.g., proximal the guard) of the housing and the aft region (e.g., proximal the cap) of the housing.
  • at least one structure e.g., a rail
  • there are at least two structures e.g., a rail
  • at least three structures e.g., a rail
  • the height of the structure (e.g., a rail) is greater than or equal to the height of the protrusion.
  • the at least one pair of blade supports and the at least one protrusion extend upwardly from a base portion of the cartridge housing and towards the skin engaging surface.
  • the razor cartridge includes at least one blade and up to eight blades positioned between the guard and the cap. Each of the blades includes a forward region. The forward region has a cutting edge. Each blade includes a middle region located adjacent the forward region and opposite to the cutting edge. Each blade includes a support region located adjacent the middle region. The support region having an upper portion that is generally opposite to a lower portion. The lower portion defines a lowermost edge that is generally opposite to the cutting edge. [00049] According to any of the embodiments herein, the cutting edge is angled with respect to the lowermost edge.
  • At least three protrusions are each positioned within a respective one of at least three notches.
  • the at least one protrusion engages at least one of the notches and is(are) retained within the at least one notches.
  • at least two protrusions are each retained within a respective one of at least two notches.
  • at least three protrusions are each retained within a respective one of at least three notches.
  • the at least one protrusion engages at least one of the notches and is(are) retained within the at least one notches by at least one flange.
  • At least two notches include at least one flange.
  • a first notch includes at least two flanges
  • a second notch includes at least one flange
  • third notch each include at least one flange.
  • the first notch is configured in the center region
  • the second notch and the third notch are configured in the mid-lateral region.
  • at least one of the notches is contiguous with the lowermost edge.
  • a center region of the at least one blade bends (e.g., deflects or projects) at least about 0.4 mm when a 3 N load is applied to the center portion of the at least one blade.
  • a center region of the at least one blade bends (e.g., deflects or projects) at most about 0.5 mm when a 3 N load is applied to the center portion of the at least one blade.
  • a center region of the at least one blade bends (e.g., deflects or projects) at least about 0.4 mm and at most about 0.5 mm when a 3 N load is applied to the center portion of the at least one blade.
  • the guard deflects between about 0.4 mm and about 0.5 mm.
  • each of the at least one blade bends (e.g., deflects or projects) at least about 0.4 mm and at most about 0.5 mm when a 3 N load is applied to the center portion of each of the at least one blade.
  • a ratio of a surface area with notches to a surface area of the support region without the notches is between about 0.1% to about 50%.
  • the razor cartridge includes a cartridge housing.
  • the cartridge housing includes at least one pair of blade supports.
  • the at least one pair of blade supports is located at each of the lateral end regions of the cartridge housing.
  • the razor cartridge includes at least one protrusion.
  • the at least one protrusion is inward of the at least one pair of blade supports.
  • the at least one protrusion is optionally located in the center region of the cartridge housing.
  • the at least one pair of blade supports and the at least one protrusion extend upwardly from a base portion of the cartridge housing and towards the skin engaging surface.
  • the cartridge housing includes an inlay.
  • the cartridge housing includes a frame.
  • the inlay is configured to attach to the frame.
  • the inlay is optionally a flexible material such as a thermoplastic material.
  • the thermoplastic material is a thermoplastic elastomeric material (e.g., TPE).
  • TPE thermoplastic elastomeric material
  • the present disclosure provides a further embodiment, including an inlay.
  • the inlay has a center region with an end region on either side of the center region, and a mid-lateral region between the center region and a respective end region.
  • Each of the mid-lateral regions and/or end regions includes at least one pair of blade supports.
  • the at least one pair of blade supports and the at least one protrusion extend upwardly from a base portion of the cartridge housing and towards the skin engaging surface.
  • the inlay includes a guard.
  • the guard is attached to the inlay.
  • the guard is optionally integral with the inlay.
  • the guard and inlay are optionally a similar material.
  • the guard and inlay are optionally the same material.
  • the guard and inlay are optionally a flexible material such as a thermoplastic material.
  • the guard and inlay are optionally a flexible material such as a thermoplastic elastomeric material.
  • the inlay includes a cap.
  • the cap is optionally attached to a channel located within the inlay.
  • the cap is integral with the inlay.
  • the cap is optionally a substantially rigid material.
  • the cap is optionally a lubricious material.
  • the cap is positioned on the inlay aft of the guard.
  • At least one blade is provided with the housing, including the inlay and/or the frame.
  • the at least one blade includes a forward region.
  • the forward region has a cutting edge.
  • the at least one blade includes a middle region located adjacent the forward region and opposite to the cutting edge.
  • the at least one blade includes a support region located adjacent the middle region.
  • the support region has an upper portion that is generally opposite to a lower portion.
  • the lower portion defines a lowermost edge that is generally opposite to the cutting edge.
  • the support region of the at least one blades is positioned within the at least one pair of blade supports such that the lowermost edge is positioned within the channel formed between the at least one pair of blade supports.
  • a center region of the at least one blade bends (e.g., deflects or projects) at least about 0.4 mm when a 3 N load is applied to the center portion of the at least one blade.
  • a center region of the at least one blade bends (e.g., deflects or projects) at most about 0.5 mm when a 3 N load is applied to the center portion of the at least one blade.
  • a center region of the at least one blade bends (e.g., deflects or projects) at least about 0.4 mm and at most about 0.5 mm when a 3 N load is applied to the center portion of the at least one blade.
  • the guard deflects between about 0.4 mm and about 0.5 mm.
  • the cap deflects between about 0.4 mm and about 0.5 mm.
  • the inlay bends (e.g., deflects or projects) at least about 0.4 mm.
  • the inlay and the components attached thereto such as the guard, the at least one blade, and/or the cap, deflect at least about 0.4 mm.
  • the inlay bends (e.g., deflects or projects) up to about 0.5 mm.
  • the inlay and the components attached thereto such as the guard, the at least one blade, and/or the cap, deflect up to about 0.5 mm.
  • the inlay bends (e.g., deflects or projects) between about 0.4 mm and about 0.5 mm. In some embodiments, the inlay and the components attached thereto such as the guard, the at least one blade, and/or the cap, deflect between about 0.4 mm and about 0.5 mm. In some embodiments, the inlay and the components attached thereto such as the guard, the at least one blade, and/or the cap, deflect together. In some embodiments, the inlay and the components attached thereto such as the guard, the at least one blade, and/or the cap, deflect together such that the geometry of the inlay remains substantially unchanged with regard to the hirsute surface when a load is applied.
  • FIG.2A is an illustration of a rear angled view of a razor cartridge according to an embodiment of the present disclosure.
  • FIG. 3 is an illustration of an exploded view of a razor cartridge according to an embodiment of the present disclosure.
  • FIG. 4 is an illustration of an exploded view of a razor cartridge according to an embodiment of the present disclosure.
  • FIG.5 is a diagrammatic cross-sectional view of a razor cartridge according to an embodiment of the present disclosure.
  • FIG.6 is an illustration of an angled view of a razor cartridge inlay according to an embodiment of the present disclosure.
  • FIG. 7 is an illustration of a front view of a razor cartridge according to an embodiment of the present disclosure.
  • FIG.78 is an illustration of a front view of a razor cartridge according to an embodiment of the present disclosure.
  • FIG. 8 is an illustration of a back view of a razor cartridge according to an embodiment of the present disclosure.
  • FIG.9 is an illustration of an angled sectional view of a razor cartridge according to an embodiment of the present disclosure.
  • FIGS. 10-10N are diagrammatic front views of a support region of a razor blade according to an embodiment of the present disclosure.
  • FIG.11 is a diagrammatic representation of a cross section of at least one razor blade according to an embodiment of the present disclosure.
  • FIG.12 is a diagrammatic representation of a front view of a razor cartridge in a rest configuration.
  • FIG.12A is a diagrammatic representation of a front view of a razor cartridge in an activated configuration according to an embodiment of the present disclosure.
  • the cartridge 22 attaches to the connector 24, and the connector 24 attaches to the handle 26.
  • the cartridge 22 and the connector 24 are coupled as a single unit or are integral, particularly when sold to a consumer.
  • the connector 24 and handle 26 are coupled as a single unit or are integral, particularly when sold to a consumer.
  • a cartridge 22 is provided.
  • the cartridge 22 typically includes a guard 28 albeit other configurations will be discussed herein, at least one blade unit 30, and a cap 32.
  • the cartridge 22 optionally includes a guard 28 spanning from a cartridge front end 34 and a rear edge 36 of the guard 28.
  • the guard 28 extends laterally such that it has a guard length 29.
  • the guard length 29 (see, e.g., FIG.6) is optionally greater than the blade length of the at least one blade unit 30.
  • the guard length 29 is optionally commensurate with the length of the cartridge 22.
  • the guard length 29 is optionally less than the length of the cartridge 22.
  • the guard 28 – whether attached to the cartridge 22 or another portion of the razor 20 - is generally in front of the at least one blade unit 30.
  • the guard 28 includes a skin-engaging surface 38 (see, e.g., in FIG. 5) designed to stretch the skin, exfoliate, lubricate, moisturize, otherwise treat the hirsute surface 40 (see, e.g., in FIG.5), and/or align hairs as they enter the at least one blade unit 30.
  • the guard 28 optionally has a topography 42 that includes peak surfaces 44 and valleys 46 between peak surfaces 44.
  • Such topography 42 optionally includes fins, ribs, a comb-type structure, or other protuberances.
  • the cartridge 22 includes at least one blade unit 30.
  • the at least one blade unit 30 includes at least one blade 48.
  • the term “blade” is synonymous with “razor blade”, and where “at least one blade” is referred to, it is commensurate with “at least one razor blade”.
  • the blade, at least one blade, razor blade, and/or at least one razor blade 48 includes a forward region 116 that is generally opposite a support region 118.
  • the forward region 116 includes a cutting edge 70.
  • the support region 118 is adjacent a middle region 122 (see FIG.11) adjacent the end of the forward region 116 opposite to the cutting edge 70.
  • the middle region 122 optionally includes an offset such as a bend 124 (see FIG.11).
  • the middle region 122 is defined as the portion that has a change between the forward region 116 and the support region 118. Such change includes a bend 124, or the juncture/overlap of the forward region 116 of the blade 48 and the support region 118 (e.g., one welded to the other).
  • the support region 118 is adjacent the middle region 122 at the end of 126 the middle region 122 opposite to the end that is adjacent the forward region 116.
  • the support region 118 has an upper portion 126 generally opposite a lower portion 128.
  • the lower portion 128 defines the lowermost edge 130.
  • the upper portion 126 and the lower portion 128 are generally half of the entire width of the support region 118, as demonstrated by the dashed line in exemplary FIGS.10-10N.
  • the blade 48 has a blade length 72 (see FIG.10), a thickness 78 (see FIG.11), and a width 86 (see FIG.13).
  • the blade length 72 is typically between 20 mm and about 50 mm, and optionally about 35 mm to about 45 mm, or optionally about 38 mm to about 43 mm, or about 38 mm, or about 40 mm, or about 41 mm, or about 43 mm.
  • the blade has a thickness 78 of between 0.05 mm and 0.125 mm, or about 0.076 mm.
  • the width 86 of the blade is between about 1 mm and about 5 mm, or between about 2 mm and about 4 mm, or about 3 mm to about 4 mm, or about 3 mm, or about 4 mm.
  • the forward region 116 has a width 86 (see FIG.13) of about 1 mm to about 3 mm.
  • the middle region 122 has a width 86 of about 0.1 mm to about 1 mm, and the support region 118 has a width 86 of about 1 mm to about 3 mm.
  • the bend 124 can be arcuate and can have an external radius in a range 0.2 to 1.5 mm, preferably 0.3 to 0.8 mm, more preferably 0.3 to 0.5 mm.
  • the lowermost edge 130 is at an end that is opposite to the cutting edge 70.
  • the cutting edge 70 is angled with respect to the lowermost edge 130.
  • the middle region 122 optionally includes a bend angle 120.
  • the bend angle 120 is defined between the cutting edge 70 and the lowermost edge 130 as it extends through the middle region 122.
  • the bend angle 120 is between the projection along the lower surface 58 of the blade 48 extends from the forward region 116 and the projection of the lowermost edge 130 extends along lower surface 58 of the support region 118 to their point of intersection proximal to the middle region 122.
  • FIG.11 shows a bent blade 60
  • a welded blade 50 may have an angle as described with the bend angle 120 that has the same dimensions as contemplated herein. It is understood that the bend angle 120 can be taken along any portion of the length 72 of the blade 48, despite variations in the blade 48 (e.g., bow or camphor in the central region 132 of the middle region 122 having a bend 124 which is a byproduct of blade bending).
  • the bend angle 120 is between about 90 degrees and about 130 degrees, or between about 100 degrees and about 125 degrees, or between about 105 degrees and about 123 degrees, or between about 108 degrees and about 123 degrees, or between about 108 degrees and about 118 degrees, or between about 108 degrees and about 112 degrees, or about 90 degrees, or about 100 degrees, or about 102 degrees, or about 103 degrees, or about 104 degrees, or about 106 degrees, or about 108 degrees, or about 110 degrees, or about 112 degrees, or about 115 degrees or about 118 degrees, or about 120 degrees.
  • the at least one blade 48 is optionally a welded blade 50 structure including a cutting portion 52 welded to a blade support region 54 (either on the top surface 56 of the blade support region 54 or a lower surface 58 of the blade support region 54).
  • the at least one blade 48 is alternatively a bent blade 60 such that it has a cutting portion 52 and a blade support region 54 or is generally flat (e.g., planar) where a cutting portion 52 is generally opposite the blade support region 54.
  • the blade support region 54 faces towards the guard 28 or faces towards the cap 32.
  • a first blade 30 unit includes at least one blade 48 positioned such that each of respective the at least one cutting portion 52 are in a first direction, while the second blade unit 62 includes at least one blade 48 positioned with each of the respective cutting portion 52 in a second direction.
  • the at least one blade 48 is optionally between one blade and seven blades, or between two blades and six blades, or between two blades and five blades, or is two blades, is three blades, is four blades, is five blades, is six blades, or is seven blades.
  • the at least one blade 48 includes a structure where the cutting portion 52 has a cutting edge 70 that is generally symmetric about a cross-section transverse to the length 72 of the at least one blade 48.
  • the at least one blade 48 includes a structure where the cutting portion 52 has a cutting edge 70 that is generally asymmetric about a cross-section transverse to the length 72 of the at least one blade 48.
  • the at least one blade 48 includes at least one notch 134.
  • the at least one notch 134 includes a void 136 within the blade 48 that is configured to be one of a number of geometries.
  • the at least one notch 134 is optionally configured to be arcuate, circular, ovular, triangular, prismatic (e.g., diamond, rhomboid, trapezoidal, square, rectangular, kite, etc.), polygonal, combinations thereof, etc., in shape.
  • the notch 134 optionally includes at least one rounded feature 138(e.g., a roundel or arch) where it is distal from the lowermost edge 130.
  • the notch 134 optionally includes at least one chamfer 140.
  • the notch 134 optionally has opposing sides 142 that extend from the opening of the notch towards each other (e.g., converging towards each other), thereby ending in a peak (e.g., a generally triangular shaped notch 134, such as a scalene, an isosceles, or equilateral triangle) or where one of the opposing sides 142 extends towards the other opposing side 142 (e.g., a right triangle).
  • the notch 134 optionally has opposing sides 142 that are arcuate and or curve towards each other.
  • the notch 134 optionally has opposing sides 142 that meet in a generally flattened end 146.
  • the at least one notch 134 has symmetry about the axis perpendicular to the blade length 72, or along the width 86 of the blade.
  • the blade 48 includes a plurality of notches 134 positioned such that the blade 48 has symmetry along the axis perpendicular to the blade length 72, or along the width 86 of the blade 48. In embodiments having at least two blades 48, 49, such symmetry optionally applies to the at least two blades 48, 49.
  • the at least one notch 134 is located within the support region 118.
  • the at least one notch 134 is optionally proximal to and/or adjacent the lowermost edge 130.
  • the at least one notch 134 optionally opens 148 (e.g., has a notch opening) at the lowermost edge 130.
  • the at least one notch 134 is positioned within the support region 118 such that it does not extend into the middle region 122.
  • the at least one notch 134 is optionally positioned within a lower portion 128 of the support region 118.
  • the at least one notch 134 optionally has at least one flange 150.
  • the flange 150 is located along the notch height 170 of the at least one notch 134.
  • the flange 150 is optionally proximal to the notch opening 148 of the at least one notch 134.
  • the flange 150 is optionally proximal to and/or adjacent to the lowermost edge 130.
  • the at least one flange 150 creates a narrow dimension 154 of the notch 134 with respect to the widest dimension 156 of the notch.
  • the at least one flange 150 optionally includes at least two flanges 150, or two flanges 150. In embodiments having at least two flanges 150, the flanges 150 may extend towards each other, and/or may be staggered such that a first flange 150 is proximal the lowermost edge 130 and a second flange 150 is further from the lowermost edge 130 than the first flange 150. In some embodiments, the at least one flange 150 is proximal to the notch opening 148. In some embodiments, the at least one flange 150 is proximal to the lowermost edge.
  • the at least one flange 150 is distal to the opposing end (e.g., at the notch height 170). In some embodiments, the at least one flange 150 is distal to the middle region 122. In some embodiments, the notch 134 includes a recess 158 adjacent the flange 150. In some embodiments, there are two notches 134, 134A that include at least one flange 150. In some embodiments, there are three notches 134, 134A, 134B that include at least one flange 150. [00099] In some embodiments (see at least FIGS.9, 10L-10N), a plurality of notches 134 include a centermost notch 168.
  • the centermost notch 168 includes two flanges 150. Each of the two flanges is located proximal the lowermost edge 130 and the notch opening 148. Laterally outward of the centermost notch 168 is a second notch 134A. Second notch 134A includes a flange 150, the flange 150 configured to extend inward from the side edge 162 of the blade 48. Third notch 134B includes a flange 150, the flange 150 configured to extend inward from the side edge 162 of the blade 48. Each of the second notch 134A and third notch 134B are on opposite sides of the centermost notch 168.
  • each of the flanges 150 in the second notch 134A and third notch 134B are shown as extending inward from the side edge 162, the flanges 150 may be configured to extend laterally outward towards a respective side edge 162.
  • each of a respective two notches are spaced apart by a notch separation length 160. The distance between the side edge 162 of the blade 48 and the at least one notch 134 is the end space length 164.
  • the end space length 164 is the distance between the side edge 162 of the blade 48 and the notch 134 closest to that respective side edge 162.
  • the notch separation length 160 is less than, equal to, or greater than an end space length 164. In certain embodiments, the notch separation length 160 is less than or equal to the end space length 164. In certain embodiments having at least five notches, a first notch separation length 160 is different from a second notch space length 160A. [000101]
  • the notch separation length 160 is at least 0.3 mm.
  • the notch separation length 160 is optionally between about 0.3 mm to about 4 mm, albeit the notch separation length 160 can be greater than 4 mm.
  • the notch separation length 160 is between about 0.6 mm and about 1.5 mm, or between about 0.8 mm and about 1.2 mm.
  • the end space length 164 is at least 0.3 mm.
  • the end space length 164 is at least 0.3 mm to about 10 mm, or between about 0.3 mm and about 6 mm, or between about 0.3 mm and about 4 mm, or between about 1 mm and about 4 mm.
  • the notch 134 has a notch length 166. In embodiments with more than one notch, the notch length 166 can vary amongst such notches 134.
  • the centermost notch 168 may have a second notch length 166A that is greater than any or all of the other notch lengths 166 (e.g., a first notch length 166).
  • the notch length 166 is at least 0.3 mm.
  • the notch length 166 is optionally between about 0.3 mm to about 4 mm, albeit the notch length 166 can be greater than 4 mm.
  • the notch length 166 is between about 0.6 mm and about 1.5 mm, or between about 0.8 mm and about 1.2 mm. In certain embodiments, the notch length 166 is less than, about equal to, or greater than the notch separation length 160.
  • the notch length 166 is less than, about equal to, or greater than the end space length 164.
  • the notch 134 has a notch height 170. In certain embodiments having at least two notches 134, each notch 134 has a notch height 170 such that there is a first notch height 170 and a second notch height 170A. The first notch height 170 is less than, about equal to, or greater than the second notch height 170A and a third notch height 170B. Optionally, the second notch 134A corresponds to a centermost notch 168.
  • a third notch 134B is included, where the first notch 134 and the third notch 134B have an equal height (e.g., the first notch height 170), and the centermost notch 168 has a second notch height 170A.
  • the second notch height 170A may be less than, about equal to, or greater than the first notch height 170.
  • having three or more notches 134, 134A, 134B, etc. each of the notches 134, 134A, 134B, etc. has a different notch height 170, or each of the notches 134, 134A, 134B, etc.
  • the end-most notches 134, 134A have a first height 170, and the heights 170A, 170B, etc. of the notches 134B, etc. inward from such end-most notches 134, 134A progressively increase to the centermost notch 168.
  • the end-most notches 134, 134A have a first height 170, and the notch heights 170A, 170B, etc. of the notches 134B, etc.
  • the heights 170 of respective adjacent notches 134 are staggered such that a first notch height 170 of a first notch 134 is greater than a second notch height 170A of a second notch 134A that is adjacent the first notch 134, while a third notch 134B has a third notch height 170B that is greater than the second notch height 170A, etc.
  • the notches 134 have a notch height 170 that is up to about 100% of the support height 190 of the support region 118, or up to about 90%, or up to about 85%, or up to about 80%, or up to about 75%, or up to about 70%, or up to about 65%, or up to about 60% or up to about 55%, or up to about 50%.
  • the at least one blade 48 has up to seventy-five notches 134, albeit longer blades exceeding 45 mm in blade length 72 may have further notches 134 subject to the surface area ratios contemplated in the present disclosure.
  • the bridge length 181 is less than half of the blade length 72 and greater than the end space length 164. In yet further embodiments, the bridge length 181 is greater than the notch length 166 of the centermost notch 168. [000111] Referring now to exemplary FIG. 5, in some embodiments, at least one blade guard 64 positioned such that it provides a support surface for the hirsute surface 40 proximal to or adjacent the cutting edge 70.
  • a skin support element 68 is positioned between a first blade unit 30 and a second blade unit 62.
  • the skin support element 68 is a dull blade or a blank (i.e., a blade that does not have a sharpened blade edge).
  • the skin support element 68 optionally includes varied topography 42 to provide functionality akin to the guard 28 and/or the cap 32, and as such, may include skin-stretching, exfoliating elements, or hair aligning features, or may optionally include lubricants, skin benefit agents, combinations thereof, etc.
  • the skin support element 68 is optionally a blade guard 64. It is noted that the guard 28 and the cap 32 also function as skin support elements 68.
  • the cap 32 is positioned rearward of the at least one blade unit 30.
  • the cap 32 optionally includes skin benefit agents such as lubricating material, emollients, nourishing ingredients, moisturizing ingredients, astringents, aseptics, anti- coagulants, combinations thereof, etc.
  • the cap 32 includes a skin benefit agent on the front surface 84.
  • the guard 28 and the cap 32 include a skin benefit agent such as a lubricant or soap.
  • the guard 28 and/or cap 32 can be movable such that the guard 28 and cap are swingable, deflectable, or pivotable about a connection axis 88 to the cartridge 22 (or optionally, an end of the at least one blade unit 30).
  • the razor cartridge 22 includes a housing 90 that includes one or more components.
  • the guard 28, at least one blade unit 30, and/or cap 32 are optionally attached to and retained by or within the housing 90, by for instance, one or more clips 92.
  • the guard 28, at least one blade unit 30, and/or cap 32 are optionally integral with the housing 90.
  • the frame 113 includes the guard 28 and/or the cap 32.
  • the inlay 112 includes at least one pair of blade supports 180 and the at least one protrusion 182.
  • the at least one protrusion 182 may extend upward from, laterally outward from, or laterally inward from a structure (e.g., a rail) 187 attached to or integral with the housing 90 (e.g., inlay 112).
  • the structure (e.g., a rail) 187 may extend between a front region (e.g., proximal the guard 28) of the housing 90 and an aft region (e.g., proximal the cap 32) of the housing 90.
  • At least one structure (e.g., the rail) 187 is located in the mid-lateral region 185, and/or the center region 186. In some embodiments, there are at least two structures (e.g., rails) 187, or at least three structures (e.g., rails) 187, etc..
  • the height of the structure (e.g., the rail) 187 is greater than or equal to the height of the protrusion 182.
  • the height of the structure (e.g., the rail) 187 is greater than the height of the at least one protrusion 182. In other embodiments, the height of the structure (e.g., the rail) 187 is less than the height of the at least one protrusion 182.
  • the height of the structure (e.g., the rail) 187 is about equal to the height of the at least one protrusion 182.
  • the at least one protrusion 182 may be configured within the center region 186 (e.g., a central protrusion 182).
  • the inlay 112 includes at least one mid- lateral protrusion 171 in a mid-lateral region 185.
  • the inlay 112 includes a central protrusion 182 and a mid-lateral protrusion 171 on each respective side of a central protrusion 182.
  • Such inlay 112 optionally includes the guard 28 and/or the cap 32.
  • the at least one protrusion 182, 171 may be structured in suitable shapes such that it has at least one ledge 183 extending laterally outwardly.
  • the at least one protrusion 182 may be shaped, for instance, as a grommet, pintel, or have other shapes such as a top-hat shape, mushroom-shape, may include arcuate and/or flattened portions, roundels, fillets, chamfers, combinations thereof, etc..
  • a central protrusion 182 is provided with a mid- lateral protrusion 171 on each respective side of the central protrusion 182.
  • a set of protrusions 182 is provided for a respective blade 48, and an array of protrusions 182 are provided for the plurality of blades 48.
  • the at least one pair of blades supports 180 is positioned at the side end region 184 of the cartridge 22. In some embodiments, at least one pair of blade supports 180 is positioned in a mid-lateral region 185. In most embodiments, there are at least two pairs of blade supports 180, where at least one is at each side end region 184 of the cartridge 22.
  • one or more pairs of blade supports 180 are within the mid-lateral region 185 of the cartridge 22. In some embodiments, one or more pairs of blade supports 180 are within the center region 186 of the cartridge 22. In some embodiments, a pair of blade supports 180 are positioned at each side end region 184, a second pair blade supports 180 are positioned at each mid-lateral region 185, and a third pair of blade supports is positioned in the center region 186 of the cartridge 22.
  • the pair of blade supports 180 define a channel 188 therebetween.
  • the channel 188 can be substantially straight, can be arcuate, angled, and/or offset, and PCT Patent Application Publication No. WO2022/216438 is incorporated by reference in its entirety herein.
  • the protrusion height 192 is optionally less than the blade support height 190 of the pair of blade supports 180.
  • the protrusion height 190 is about equal to the blade support height 190.
  • the protrusion height 190 is greater than the blade support height 192.
  • the cartridge 22 includes at least one attachment region 94 (see FIG.1).
  • the at least one attachment region 94 enables the cartridge 22 to selectively attach to, or matingly engage with a connector 24.
  • the at least one attachment region 94 is in mechanical communication with reciprocal features on the connector 24.
  • the at least one attachment region 94 is integral with at least one journal 96 on the connector 24.
  • the at least one attachment region 94 optionally includes at least two attachment regions 94, or two attachment regions 94, 94A.
  • the at least one attachment region 94 optionally includes a bearing surface 98 such as a shell bearing.
  • the at least one attachment region 94 optionally includes an end 100 including a recess such as a trunnion or other suitably shaped feature to engage with a reciprocal feature on the journal 96 of the connector.
  • the at least one attachment region 94 includes a pin or a pin receiving structure that also enables a pivotal connection with the connector 24. [000125] Referring now to exemplary FIG.
  • the cartridge 22 includes the cartridge housing 90 having a back side 76 defines a track 106 that interacts with a biasing element 102 on the connector 24 or a biasing element 102 on the handle 26 that engages through the connector 24.
  • the track 106 optionally includes laterally positioned side rails 108 defining a recessed surface 110.
  • the track 106 is positioned generally along the vertical axis 80 and is generally orthogonal to the length 82 of the cartridge 22 (see FIG.12).
  • the track 106 is positioned in the central portion 104 of the back side 76 of the cartridge 22.
  • the track 106 is positioned laterally outward of the central portion 104 of the back side 76 of the cartridge 22.
  • the cartridge 22 may have a pivot axis 114 in a variety of locations depending on the configuration of the razor 20, including a pivot axis 114 within the guard 28, a pivot axis 114 in the cap 32, a pivot axis 114 generally centrally-located in the at least one blade unit 30, etc.
  • the connector 24 includes a pair of journals 96 – a first journal 96 and a second journal 96A – that extend outwardly from the connector 24.
  • Each journal 96 optionally includes an end 100 having a connecting feature such as a bearing surface such as a shell bearing.
  • Each journal 96 optionally includes a connecting feature such as recess such as a trunnion or other suitably shaped feature to engage with a reciprocal feature on the attachment region 94 of the cartridge 22.
  • each journal 96 includes a pin or a pin receiving structure that also enables a pivotal connection with the attachment region 94 of the cartridge 22.
  • the razor 20 includes a biasing element 102 that is in mechanical communication with the back side 76 of the cartridge 22 and the connector 24. The biasing element 102 extends from the connector 24.
  • the biasing element 102 optionally extends from the journals 96.
  • the biasing element 102 has a number of configurations including arcuate, elongate, etc.
  • the biasing element 102 is optionally generally aligned along or generally parallel to the central axis 194.
  • the cartridge 22, the connector 24, and the handle 26 are generally aligned along the central axis 194.
  • the razor 20 has symmetry along the central axis 194.
  • each of the cartridge, 22, connector 24, and handle 26 have symmetry along the central axis 194.
  • the cartridge 22 and the connector 24 are optionally attached, particularly as made commercially available to retailers and consumers.
  • the cartridge 22, connector, 24, and handle 26 are attached and configured for use by a consumer. These components are optionally integral. These components are optionally separable.
  • the connector 24 and the handle 26 are attached, particularly as made commercially available to retailers and consumers.
  • the connector 24 and the handle 26 are integral. These components are optionally integral. These components are optionally separable.
  • FIG.13 an exemplary process and related steps for the manufacture is disclosed in commonly assigned U.S. patent application publication 2022/0250266, the disclosure of which is hereby incorporated for reference in its entirety.
  • a so-called single edge razor blade having a bend 124 and of the alloys under evaluation are schematically depicted.
  • Elongated stainless steel (and/or optionally a different material as contemplated herein) strip 196, as provided, is depicted at step (a).
  • the strip 196 has a width 200 and a thickness 202 and includes a front edge portion 197 and a back edge portion 198.
  • the width 200 of the strip 196 is preferably about 3 mm wide but can be any width 200 to suit the application at hand from about 2 mm or less to about 22 mm or more, or about 4 mm.
  • the thickness 202 of the strip 196 as-provided can be 0.1 mm or less but is preferably about 0.076 mm. In other cases strip 196 having a thickness 202 of about 0.025-0.05 mm or greater than 0.1 mm, e.g.0.125 mm can be employed.
  • the strip 196 is hardened and tempered to a hardness about 660-850 HV by well-known process(es).
  • the front edge portion 197 is sharpened by any well-known sharpening process such as grinding and honing to provide an elongated cutting edge 70.
  • a double-edge razor blade can be employed.
  • Strip material 196 having a suitable width 200 (e.g. about 22 mm) is perforated in continuous strip 196 form to provide apertures that can include an elongated center slot that can be used to support or locate the blade strip 196 during subsequent processes such as edge forming and edge coating and location holes that can be used to index the strip or to locate a discrete razor blade 48 during certain processes.
  • Process steps (b) and (c) are performed as described above, with an exception that both the front edge portion 197 and back edge portion 198 are sharpened to provide cutting edges 70.
  • the elongated strip 196 is then separated into discrete double edge razor blades 48.
  • Process step (d) (below) is performed to both cutting edges 70 as described above.
  • the double edge razor blade 48 is then split preferably adjacent the ends of the center slot to provide two single edge razor blades 48.
  • Process step (f) is optionally performed before, in between, or after steps (a) through (e).
  • step (f) includes creating notches 134 in the strip 196 such that at least one notch 134 is created in the support region 118 of the at least one blade 48.
  • notches 134 if effectively prior to step (b), are done to the support region 118 on both portions of strip 196 later resulting in two separate blades 48, or in an enlarged support region 118 for a double-edged blade 48.
  • the at least one notches 134 are formed into the support region 118 of the blade 48 by way of stamping or punching, wire cutting (e.g., hot wire cutting), laser cutting, plasma cutting, ultrasonic welding, or other known means to one of skill in the art. [000135]
  • process step (g) (below) is performed.
  • suitable coating(s) 204 applied to the cutting edge 70 by well-known processes.
  • One or more under-coatings can include, but are not limited to, one or more of chromium, platinum, niobium, titanium, alloys of the aforementioned materials and compounds of the aforementioned materials compounded with e.g. carbon or nitrogen.
  • a suitable titanium coating 204 is disclosed in commonly assigned U.S. patent application publication 2007/0186424 the disclosure of which is hereby incorporated for reference in its entirety. Also various types of hard carbon coatings 204 such as amorphous diamond, diamond-like-carbon (DLC) and combinations with the above can be applied.
  • An outer coating 204 of a fluoropolymer material, preferably PTFE is applied.
  • a suitable PTFE coating 204 is disclosed in commonly assigned U.S.
  • a lengthwise extending portion 206 is cut from the strip 196 to provide a discrete razor blade 48.
  • the discrete razor blade 48 has properties of the strip 196 from which it was cut.
  • step (g) the razor blade 48 is bent to provide a bend 124 in the middle region 122 between the forward portion 116 containing the cutting edge 70 and a support region 118 containing the lowermost edge 130.
  • process step (f) is optionally done before or after step (g).
  • the blade strip 196 is optionally subject to heating and cooling, in addition to other treatments forming interlayers (hard coatings) and other outer coatings thereafter (e.g., PTFE or other lubricious coatings, such as silicon). It is understood by one of skill in the art that during such treatment and coating processes, the metallurgy of the blade strip 196 is modified thereby potentially making it more difficult to create notches 134 as in step (f) discussed above.
  • FIG. 11 A representative sectional view of the razor blade 48 having a bend 124 is shown in FIG. 11.
  • the bending process can be a punch-and-die process.
  • the bending process can also be a "swivel bending" process, e.g. as described in commonly assigned U.S. patent application publication 2010/0107425 the disclosure of which is hereby incorporated for reference for its disclosure of a bending process.
  • the bending process can also be any suitable process to impart a bend 124 to a razor blade 48 as exemplified in FIG. 11.
  • the bending process is preferably performed without any prior reheating process to modify the razor blade's 48 structure or ductility in the region of the razor blade being bent, i.e.
  • the blade 48 is assembled into the cartridge 22 by positioning the at least one blade 48 into the cartridge housing 90 such that the support region 118 of the at least one blade 48 is aligned within the channel 188 formed between the at least one pair of blade supports 180 (which are located within each side end region 184 of the cartridge housing 90). Accordingly, the lowermost edge 130 is proximal the bottom of the channel 188 between the at least one pair of blade supports 180.
  • the at least one blade 48 is positioned proximal to the at least one protrusion 182 located in the center region 186 of the cartridge housing 90.
  • the at least one protrusion 182 is optionally positioned within the void 136 of the centermost notch 168.
  • the at least one protrusion 182 is positioned to extend upwardly from the cartridge housing 90 towards the skin engaging surface 38 of the cartridge 22.
  • the centermost notch 168 includes at least one flange 150 extending inwardly from the side end region 184 of the blade 48 thereby creating a narrow dimension 154 (e.g. a narrow width) of the centermost notch 168.
  • the at least one flange 150 may deflect (e.g.
  • the protrusion 182 clears the at least one flange 150, the flange 150 is released from its deflected position.
  • the protrusion 182 is thereafter positioned within the notch 134 (e.g., the ledge 183 of the protrusion 182, 171 is proximal to or adjacent to the flange 150, where the ledge 183 is positioned above the flange 150 with respect to the lowermost edge 130).
  • the protrusion 182 has a geometry within the void 136 of the notch 134 that is smaller than the geometry of the void 136 such that the protrusion 182 is within the void 136 but is not supporting the blade 48.
  • the notch 134 includes a recess 158 adjacent the flange 150 that is suitably configured such that the geometry of the protrusion 182 fits within the void 136 and also the recess 158.
  • the void 136, optionally the at least one recess 158, and the notch 134 engage each other to provide a connection between the blade 48 and the cartridge housing 90.
  • Connection is understood in this specific context to describe the relationship between the protrusion 182 and the notch 134 thereby creating a connection without the protrusion 182 configured as a blade support 180 on either side end region 184 of the cartridge housing 90.
  • the cartridge housing 90 includes multiple components, such as an inlay 112.
  • the inlay 112 includes the at least one pair of blade supports 180 and the at least one protrusion 182.
  • Such inlay 112 optionally includes the guard 28 and/or the cap 32, and/or features suitable for retaining such features by way of mechanical fastening, chemical fastening (e.g. glue, ultrasonics, laser welding, etc.) or by way of a two-shot molding process.
  • the cartridge housing 90 optionally includes a frame 113 wherein the inlay 112 is at least partially contained and situated within.
  • the frame 113 includes the guard 28 and/or the cap 32, the at least one pair of blade supports 180, and/or features suitable for retaining such features by way of mechanical fastening, chemical fastening (e.g. glue, ultrasonics, laser welding, etc.) or by way of a two-shot molding process.
  • the inlay 112 and the frame 113 are assembled together by way of mechanical fastening, chemical fastening (e.g. glue, ultrasonics, laser welding, etc.) or by way of a two-shot molding process.
  • Such assembly of the inlay 112 and the frame 113 is optionally before or after the at least one blade 48 is inserted into the at least one pair of blade supports 180.
  • the at least one blade 48 is further positioned such that the at least one protrusion 182 is within the void 136 of the at least one notch 134 (e.g., the centermost notch 168, and in some embodiments also the mid-lateral notches 134A, 134B), the inlay 112 and the frame113 are attached, and other features such as the guard 28 and the cap 32 are assembled to the cartridge housing 90, a pair of clips 92 are attached to the cartridge housing 90 thereby retaining the components of the cartridge 22 together.
  • the pair of clips 92 are attached by way of mechanical fastening (e.g., press-fit, interference fit, hot staking, deformation of the legs 208 and/or ends 210 of the clips 92 to thereby bend the ends 210 such that they are angled to the leg 208 of the clip 92, combinations thereof, etc.) and/or chemical fastening (e.g. glue, ultrasonics, laser welding, etc.).
  • mechanical fastening e.g., press-fit, interference fit, hot staking, deformation of the legs 208 and/or ends 210 of the clips 92 to thereby bend the ends 210 such that they are angled to the leg 208 of the clip 92, combinations thereof, etc.
  • chemical fastening e.g. glue, ultrasonics, laser welding, etc.
  • the central region 132 is concave, either as a byproduct of the blade bending (e.g., a bow or camphor), or is otherwise biased to be concave.
  • the central region 132 is optionally biased upwardly into a convex configuration by (e.g., when configured with the inlay 112) at least one protrusion 182 engaging the at least one notch 134.
  • the embodiments of the present disclosure are capable of controlled bending (e.g., deflection, projection, etc.) when under simulated shaving load conditions (e.g., activation) of 3 N, and 5 N.

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  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Packaging Of Annular Or Rod-Shaped Articles, Wearing Apparel, Cassettes, Or The Like (AREA)

Abstract

L'invention concerne une lame de rasoir. La lame de rasoir comprend un bord de coupe sur une région avant de la lame qui est inclinée par rapport au bord le plus bas de la région de support. Une région centrale est disposée entre la région avant et la région de support, la région centrale étant éventuellement un décalage tel qu'un coude. La lame de rasoir comprend au moins une encoche. La ou les encoches sont situées dans la région de support. Une tête de rasoir est pourvue d'au moins une lame de rasoir, la tête de rasoir ayant un boîtier comprenant une région de support pour venir en prise avec au moins une encoche.
PCT/US2024/059123 2023-12-11 2024-12-09 Tête de rasoir et lame s'y rapportant Pending WO2025128457A1 (fr)

Applications Claiming Priority (2)

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US202363608631P 2023-12-11 2023-12-11
US63/608,631 2023-12-11

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WO2025128457A1 true WO2025128457A1 (fr) 2025-06-19

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Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3816913A (en) * 1972-10-03 1974-06-18 Warner Lambert Co Razor with adjustable blade cartridge
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US3816913A (en) * 1972-10-03 1974-06-18 Warner Lambert Co Razor with adjustable blade cartridge
US20070124944A1 (en) 2005-11-30 2007-06-07 Eveready Battery Company, Inc. Razor blade and method of making it
US20070186424A1 (en) 2006-02-10 2007-08-16 Eveready Battery Company, Inc. Multi-layer coating for razor blades
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US20100077618A1 (en) * 2008-09-29 2010-04-01 Mark Peterson Razor cartridges with perforated blade assemblies
US20120192431A9 (en) * 2009-11-18 2012-08-02 Kevin James Wain Blades for Shaving Razors
US20210107173A1 (en) * 2014-11-21 2021-04-15 Leaf Shave Company Razor with Pivoting Head
US20220134587A1 (en) * 2017-02-17 2022-05-05 Leaf Shave Company Trimmer Razor
US20210094196A1 (en) * 2017-07-28 2021-04-01 Bic Violex S.A. Blade assembly with lubricating elements
US20220250266A1 (en) 2019-02-28 2022-08-11 Edgewell Personal Care Brands, Llc Razor blade and composition for a razor blade
WO2022216438A1 (fr) 2021-04-05 2022-10-13 Edgewell Personal Care Brands, Llc Cartouche de rasoir pour rasage humide munie de fentes de lame
US20230234252A1 (en) * 2022-01-26 2023-07-27 Jeremy Hernandez Shaving Blade Device

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