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WO2009002581A2 - Toile moustiquaire - Google Patents

Toile moustiquaire Download PDF

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Publication number
WO2009002581A2
WO2009002581A2 PCT/US2008/059229 US2008059229W WO2009002581A2 WO 2009002581 A2 WO2009002581 A2 WO 2009002581A2 US 2008059229 W US2008059229 W US 2008059229W WO 2009002581 A2 WO2009002581 A2 WO 2009002581A2
Authority
WO
WIPO (PCT)
Prior art keywords
yarns
group
insect screen
mesh
pattern
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.)
Ceased
Application number
PCT/US2008/059229
Other languages
English (en)
Other versions
WO2009002581A3 (fr
Inventor
Claus Graichen
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of WO2009002581A2 publication Critical patent/WO2009002581A2/fr
Anticipated expiration legal-status Critical
Publication of WO2009002581A3 publication Critical patent/WO2009002581A3/fr
Ceased legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B21/00—Warp knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes
    • D04B21/10—Open-work fabrics
    • D04B21/12—Open-work fabrics characterised by thread material
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/10—Scrim [e.g., open net or mesh, gauze, loose or open weave or knit, etc.]
    • Y10T442/102—Woven scrim
    • Y10T442/183—Synthetic polymeric fiber

Definitions

  • the present invention relates to insect screens.
  • Insect screens are widely used in windows, doors, porches, gazebos and the like. No one will argue that insect screens are not functional. Whether they are used in doors, windows or screened porches, insect screens make certain areas of a home habitable and enjoyable, especially during summer months and in areas where insects are prevalent.
  • a knitted insect screen is provided with a pattern incorporated into the insect screen.
  • the insect screen is knitted from at least two groups of yarn.
  • the first group of yarns forms a grid or mesh while the second group of yarns is knitted into a pattern that extends over an area of the insect screen.
  • Figure 1 is a front elevation view of an insect screen in a window.
  • Figures 2A and 2B are lapping diagrams for mesh yarn inlays.
  • Figure 2C illustrates lapping diagrams for pillar stitched mesh yarns.
  • Figure 2D illustrates the combination of yarn inlays and pillar stitched yarns of Figures 2A and 2B.
  • Figure 2E illustrates patterning yarns showing pillar stitching in non-non- patterned areas and tricot stitching across two wales in patterned areas.
  • Figure 2F illustrates patterning yarns showing pillar stitching in non-non- patterned areas and tricot stitching across three wales in patterned areas.
  • Figure 2G illustrates patterning utilizing the patterning yarns of Figures 2E and 2F superimposed.
  • Figure 3 is a threading diagram and stitch construction for an insect screen fabric using a 3 needle / 3 needle technique.
  • Figure 4 is a threading diagram and stitch construction for an insect screen fabric using a 2 needle / 3 needle technique.
  • insect screen of the present invention is shown therein and indicated generally by the numeral 100.
  • Insect screen 100 is of a general mesh or grid construction.
  • Pattern 101 can include individual patterns spaced apart on the insect screen 100, as illustrated in Figure 1 , or can include one continuous pattern that extends over a substantial portion of the insect screen.
  • Various patterns 101 can be incorporated. Typical examples of patterns are palm trees, leaves, landscapes, etc.
  • insect screen 100 can be used in a wide variety of areas. For example, insect screen 100 can be used in doors, windows, porches, gazebos and other areas where desirable to prevent the ingress of insects.
  • Insect screen 100 is of a knit construction. Yarns, such as synthetic yarns, are knitted together to form the basic mesh or grid construction as well as the pattern 101. Basically, at least two groups of yarns are utilized to form insect screen 100. A first group of yarns is knitted together to form the mesh or grid. This first group of yarns is sometimes referred to as mesh yarns. The mesh or grid can assume various shapes. Typically the mesh or grid will include tiny rectangular openings formed between yarns. In addition to the first group of yarns, or the mesh yarns, there is also a second group of yarns utilized to form pattern 101 that visually contrasts with the mesh or grid. These yarns may be referred to as patterning yarns.
  • the two groups of yarns may be of the same color or shade.
  • each group may include yarns of different or distinct colors or shades from the yarns of the other group.
  • the mesh yarns could be clear polypropylene yarns while the patterning yarns could be colored yarns or yarns that are more nearly opaque or black. This provides an additional visual contrast between the mesh or grid and pattern 101 .
  • the two groups of yarns may be selected to exhibit other properties, such as composition, denier, ply, etc., that are different in one group than in the other group.
  • insect screen 100 includes non- patterned areas 102 and patterned areas 104. In the non-patterned areas 102, the patterning yarn lies generally adjacent the mesh yarn.
  • the mesh or grid is formed by both the mesh yarn and the patterning yarn.
  • the patterning yarn is diverted from the mesh yarn to form pattern 101 .
  • the patterning yarn is extended across mesh or grid openings so as to partially close selected openings. This gives rise to a pattern effect.
  • FIGS 2A-2G illustrate sequentially the basic construction of the insect screen 100.
  • Each of Figures 2A-2G illustrate the same 10 course (C1 -C10) by 5 wale (W1-W5) portion of insect screen 100 showing the dispositions of the various yarns used in forming the screen.
  • a single course indicates the instantaneous location of the knitting machine needle array while forming screen 100.
  • Each wale indicates the sequence of locations of a particular needle in the needle array during the formation of screen 100.
  • a first group of yarns referred to as the mesh yarns, include an array of zigzag yarns that zigzag back and forth across wales and along courses forming inlays 33 and 34, as shown in Figures 2A and 2B.
  • the mesh yarns also include an array of connecting yarns that form connecting stitches 32 as shown in Figure 2C. Connecting stitches 32 bind the zigzag yarns together.
  • the zigzag yarns comprise two sub-groups of yarns.
  • the two subgroups of zigzag yarns form opposing inlays, one as illustrated in Figure 2A and the other as illustrated in Figure 2B.
  • the connecting yarns form pillar stitches 32 at selected locations to bind the zigzag yarns together, which in turn forms the mesh.
  • the zigzag yarns of one sub-group extend across a predetermined number of courses along a wale and then turn and extend across a predetermined number of wales to the next course, and thereafter continue to extend along wales and courses in alternating fashion.
  • one of the zigzag yarns lies below needle location C1 -W3, extends around the needle location to the left, extends along wale W3 to needle location C3-W3, turns and extends out of wale W3 and across wale W4 to needle location C4-W5.
  • a zigzag yarn may, in some embodiments, start in every wale in course C1 and zigzag along wales and across courses in this manner, as illustrated in Figure 2A.
  • the zigzag yarns of the other sub-group are inlayed in opposition as can be seen by comparing Figures 2A and 2B.
  • one of the zigzag yarns lies below needle location C1-W3, extends to the right of the needle location, extends along wale W3 to needle location C3-W3, and then turns and extends out of wale W3 and across wale W2 to needle location C4-W1.
  • one sub-group of zigzag yarns forms inlays 33 that are open to one side
  • the other sub-group of the zigzag yarns forms inlays 34 that are opposed and open to the opposite side.
  • the side openings are effectively closed to form the mesh and the tiny openings are bounded by the zigzag yarns.
  • Figure 2D shows the yarn layout when inlays 33 and 34 and pillar stitches 32 are superimposed.
  • the mesh or grid is clearly apparent in that each opening is bounded by a vertical element 105V and a horizontal element 105H.
  • Vertical elements 105V are formed by pillar stitches 32 and portions of inlays 33 and 34 which run within each wale.
  • Horizontal elements 105H are formed by the portions of inlays 33 and 34 that extend out of wale from one course to another course.
  • Inlays 33 and 34 may, as illustrated in Figures 2A and 2B, be repeated in every wale or they may be spaced apart one or more wales. Connecting yarns form stitches 32 along every wale in which a zigzag yarn turns around a needle location. In one embodiment, illustrated in Figures 2A and 2B, zigzag yarns form inlays 33 and 34 that are immediately adjacent one another, and the connecting yarns form pillar stitches 32 extending along every wale and connecting to the zigzag yarns at every needle location.
  • the size of the tiny openings in the mesh can be varied in several ways.
  • the size of the openings can be varied by varying the needle spacing or varying the length of the in wale run of the zigzag yarns.
  • the patterning yarn, or second group of yarns is incorporated into insect screen 100 in two different ways as illustrated in Figures 2E - 2G. First, in non-patterned areas 102, the yarns of the second group tend to follow the connecting yarns of the first group. That is, in non-patterned areas 102, the yarns of the second group extend alongside the connecting yarns of the first group, and also form pillar stitches 31 A and 31 B.
  • the yarns of the second group, or the patterning yarns cooperate with the yarns of the first group to form the mesh or grid.
  • the yarns of the second group are diverted to form a pattern or series of patterns. Effectively, the patterning yarns are diverted such that they extend across openings in the mesh or grid, and at least partially close these openings such that when a substantial area of the screen 100 is viewed a pattern 101 is seen.
  • the second group of yarns is diverted for the purpose of forming the pattern 101 , they are attached to other yarns in the insect screen 100 by tricot stitches 31AP and 31 BP.
  • the yarns utilized in producing insect screen 100 may be beam or creel fed. Generally, yarns used to form stitches which consume approximately equal amounts of yarn continuously may be beam fed. That is, such yarns would be wound on the beam together ad fed generally uniformly from the beam. Yarns forming stitches or inlays with varying consumption rates during the knitting process are generally creel fed. Each yarn is supplied from a separate spool housed in the creel and fed from there to the knitting machine. Creel feeding such yarns prevents distortion of the grid or mesh structure of insect screen 100. [0029] Figure 3 illustrates one embodiment the insect screen 100 constructed by warp knitting on a Piezo Jacquard machine equipped with a fall plate and employing the 3 needle / 3 needle inlay technique.
  • the machine gauge is 12 needles per inch.
  • the stitch construction indicated generally by the numeral 30, shows a representative portion of screen 100 showing non-patterned areas 102 and patterned areas 104.
  • the yarns and threading thereof utilized in forming screen 100 are illustrated in the threading diagram, indicated generally by the numeral 50.
  • the stitch construction 30 that forms screen 100 illustrates the stitches and their relationships in the fabric that forms the screen 100.
  • Insect screen 100 comprises a generally rectangular mesh or grid structure formed along courses C1-C11 and across wales W1-W9.
  • Patterned areas 104 are yarn structures that are integrated with the mesh or grid structure to form an aesthetic appeal while maintaining functional attributes.
  • Non-patterned areas 102 comprise the grid or mesh structure.
  • the 3 needle / 3 needle inlay technique provides relatively high width stability to the mesh or grid structure of insect screen 100.
  • the openings in the grid or mesh structure are spaced approximately 14 openings per inch.
  • yarns used to form insect screen 100 may be of various types, including synthetic yarns.
  • the yarns are polypropylene yarns, specifically 1/70/36 HESR 100% polypropylene solution dyed.
  • a first group of yarns is utilized uniformly throughout the fabric to form the mesh or grid structure.
  • Yarns of a second group are aligned with and form a part of the mesh or grid structure in non-patterned areas 102, but are diverted in patterned areas 104 to form the pattern or patterns structures.
  • the yarns of the second group would preferably be creel fed so as to have little or no distortion of the mesh or grid structure.
  • Yarns 52, 53, and 54 comprise the first group of yarns and are guided by ground guide bars L2, L3, and L4, respectively, to form the grid or mesh structure.
  • Yarns 51 A and 51 B comprise the second group of yarns, guided by Jacquard guide bar L1A, L1 B to alternately align with the mesh or grid in non-patterned areas 102 and selectively divert in patterned areas 104 to form pattern 101.
  • the guide bars are functional elements of a warp knitting machine that engage needles to form the various stitches and inlays to comprise the structure of a knitted fabric. Selectively diverting yarns 51 A and 51 B is effected by shifts of certain individual guides of Jacquard L1A and L1 B using the piezo capability of the Jacquard.
  • the fabric is formed utilizing several stitch trajectories.
  • Yarn 54 forms inlay 34 spanning 3 needle locations, and yarn 53 forms an opposed inlay 33 likewise spanning 3 needles.
  • This 3 needle / 3 needle inlay technique provides relatively high width stability to the grid or mesh structure.
  • Both inlay 33 and inlay 34 each span three wales, or needle locations.
  • yarn 54 guided by guide bar L4, laps to the right about needle position C1 -W3, then back to the left to lap C2-W1 , then to the right to lap C2-W1 , then to the left to lap C3-W1 , and finally to the right to C5-W3.
  • Inlay 34 repeats up across the courses, and the stitch is repeated for every wale. That is, an inlay 34 begins, in one embodiment as shown in stitch construction 30, at each of wales W1 , W2, W3, W4, W5, W6, W7, W8, W9, and each inlay repeats across the courses. Thus, successive inlays 34 partially overlap preceding inlays 34 forming a portion of the grid or mesh structure. Similarly, yarn 53, guided by guide bar L3, forms an opposed inlay 33 by lapping, for example, to the left of C1-W4, then right to lap C2-W6, then left to lap C3-W6, then right to lap C4-W6, and finally left to C5-W4 to form a cycle of the inlay.
  • inlay 33 repeats across courses with a yarn forming an inlay 33 beginning in every wale.
  • yarns 53 and 54 form opposed inlays 33 and 34 due to the opposed shogging of guide bars L3 and L4 to produce the conformation of the grid or mesh with relatively high width stability.
  • the generally vertical elements 105V of the grid or mesh are formed by the partially overlapping portions that run sinuously up individual wales between the horizontal elements.
  • the mesh or grid is bound or stitched together by open pillar stitches 32 formed utilizing yarn 52 running up each wale.
  • Pillar stitches 32 engage and wrap yarns 53 and 54 where they cross to provide the lengthwise stabilityy of screen 100.
  • yarns 51 A and 51 B guided by Jacquard sections L1 A and L1 B, respectively, generally align with, and lay adjacent, yarn 52 running along the wales.
  • yarns 51 A and 51 B from open pillar stitches 31 A and 31 B, respectively, in unison with stitches 32 in non-patterned areas 102. Because of the changing nature of the stitches formed by yarns 51 A and 51 B, the yarns may be creel fed.
  • yarns 51 A and 51 B are diverted to form open tricot stitches 31 AP and 31 BP crossing one or more wales.
  • yarn 51A binds other yarns at C1-W2, then laps leftward to C2-W1 binding and engaging yarns at that location, and finally laps rightward to C3-W2 to form open tricot stitch 31AP.
  • the portion of yarn 51 A lapping from, for example, C2-W1 to C3-W2 crosses a portion of the mesh cell formed by vertical grid elements 105V formed along wales W1 and W2 and the horizontal grid elements 105H between C1 and C2 and between C4 and C5.
  • Yarn 51 A crossing a mesh cell creates part of a pattern area 104.
  • yarn 51 B binds other yarns at C1 -W3, angles leftward to bind other yams at C2-W1 , and finally angles rightward to form open tricot stitch 31 BP.
  • yarn 51 A being thus diverted crosses one or more mesh cells and forms part of a pattern area 104 by partially closing an opening in the mesh.
  • yarns 51 A and 51 B at various locations in fabric, various pattern structures may be produced.
  • Another embodiment entails the use of the 2 needle / 3 needle inlay technique as illustrated in Figure 4.
  • Insect screen 100 in this embodiment differs from the embodiment illustrated in Figure 3 in regards to inlays 43 and 44 formed by yarns 53 and 54 guided by ground bars L3 and L4, respectively.
  • Inlay 44 spans only two wales, or needle locations while inlay 43 spans three wales, or needle locations.
  • yarn 64 laps rightward around C1-W7, then leftward around C2-W6, then rightward around C3-W6, then leftward around C4- W6, and finally rightward to C4-W7 to form inlay 44 spanning two wales, or needle locations.
  • Yarn 63 laps leftward around C1-W3, then rightward around C2-W5, then leftward around C3-W5, then rightward around C4-W5, and finally leftward to C4-W3 to form inlay 43 spanning three wales, or needle positions.
  • inlays 43 and 44 in Figure 4 each commence, in one embodiment, in each wale and run along wales across courses as described.
  • the 2 needle / 3 needle inlay technique provides relatively lower widthwise stability of insect screen 100 as compared to the earlier-described embodiment that employs the 3 needle / 3 needle inlay technique, albeit with a lower yarn consumption.
  • 2 needle / 3 needle inlay technique may provide stiffer horizontal, or widthwise, elements 105H in insect screen 100 due to the shorter wale-to-wale yarn traverses included in inlay 33.
  • the 2 needle/ 3 needle inlay technique provides cleaner, more balanced in width and length mesh or grid openings.
  • the embodiment described above utilizing the 2 needle / 3 needle inlay technique also provides mesh or grid opening spacing of about 14 openings per inch. Other opening spacings can be produced.
  • finishing operations include stretching and tensioning insect screen and subjecting the screen to a heated environment for a certain period of time. This is accomplished using finishing ovens where the conveyor conveys the tensioned insect screen 100 through the ovens. Such finishing systems are well known to those of ordinary skill in the art.
  • the oven is set at about 33O 0 F and the screen is retained in the oven for approximately one minute.
  • the melting point of polypropylene yarns is about 330 0 F, and the softening point is about 29O 0 F.
  • Heating the yarns that comprise insect screen 100 plasticizes the yarns and heat fuses the stitches. This causes insect screen 100 to be "set", meaning that after being removed from the conveyor, the screen generally assumes the same area it assumes when stretched in tension on the conveyor. Moreover, plasticizing the yarns and heat fusing the stitches tends to make insect screen 100 more rigid.
  • insect screen 100 is tensioned by the side selvages when connected to pins or hooks of the conveyor that moves through the heated area. It is preferable to construct the side selvages of yarns having a higher melting point than the yarns utilized to form insect screen 100. This will generally preclude the side selvages from being melted during the finishing operation by heat transmitted from the pins or hooks of the conveyor thereby enabling screen fabric 100 to be held throughout the finishing operation.
  • the present invention may, of course, be carried out in other ways than those specifically set forth herein without departing from essential characteristics of the invention.
  • the present embodiments are to be considered in all respects as illustrative and not restrictive, and all changes coming within the meaning and equivalency range of the appended claims are intended to be embraced therein.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Knitting Of Fabric (AREA)
  • Treatment Of Fiber Materials (AREA)

Abstract

L'invention concerne une toile moustiquaire constituée de fils synthétiques tricotés et présentant un motif tricoté intégré. Des premier et deuxième groupes de fils, tels que de polypropylène, sont tricotés avec le premier groupe de fils formant une grille ou une maille tandis que le deuxième groupe de fils forme un motif. Une fois la toile moustiquaire tricotée, la toile moustiquaire est soumise à une opération de finissage. Lors du finissage, la toile moustiquaire est étirée et tendue à l'aide de lisières constituées d'un troisième groupe de fils. La toile moustiquaire tendue est chauffée, ce qui conduit les fils à au moins se plastifier légèrement et ce qui conduit à un assemblage par fusion d'au moins certains points de liage. Ensuite, la toile moustiquaire et les fils sont refroidis, la toile moustiquaire devenant ainsi plus rigide et adoptant généralement la configuration étirée en l'absence d'étirage.
PCT/US2008/059229 2007-06-27 2008-04-03 Toile moustiquaire Ceased WO2009002581A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US11/769,162 2007-06-27
US11/769,162 US20090004939A1 (en) 2007-06-27 2007-06-27 Insect Screen

Publications (2)

Publication Number Publication Date
WO2009002581A2 true WO2009002581A2 (fr) 2008-12-31
WO2009002581A3 WO2009002581A3 (fr) 2009-12-30

Family

ID=40161152

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2008/059229 Ceased WO2009002581A2 (fr) 2007-06-27 2008-04-03 Toile moustiquaire

Country Status (2)

Country Link
US (1) US20090004939A1 (fr)
WO (1) WO2009002581A2 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9499246B2 (en) 2014-04-10 2016-11-22 Scott D. Shoemaker Paddle assembly
EP3379926B1 (fr) * 2015-11-25 2024-04-10 Lymeez LLC Barrière d'acariens parasites
US12215445B2 (en) 2020-07-31 2025-02-04 Herman Miller, Inc. System and method of manufacturing suspension member
CN113684600A (zh) * 2021-08-26 2021-11-23 无锡红豆居家服饰有限公司 拼接面料及服装

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2353225A (en) * 1943-04-30 1944-07-11 Dreyfus Camille Window screen
CA2365570A1 (fr) * 2000-12-20 2002-06-20 Saint-Gobain Technical Fabrics Canada, Ltd. Tissu maille pour moustiquaire
DE10111308B4 (de) * 2001-03-09 2004-02-12 Tesa Ag Verwendung eines textilen Flächengebildes zur Anbringung vor Fenstern oder Türen
DE10202256A1 (de) * 2002-01-21 2003-07-31 Tesa Ag Pollen- oder Insektengitter zum Anbringen an Gebäudeöffnungen wie Fenster, Türen oder dergleichen
US20040198115A1 (en) * 2003-03-31 2004-10-07 Mcgregor Gordon L. Insect screen with improved optical properties

Also Published As

Publication number Publication date
WO2009002581A3 (fr) 2009-12-30
US20090004939A1 (en) 2009-01-01

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