US1987187A - Protected blade - Google Patents

Description

Jan. 8, l1935. H 1 GAISMAN 1,987,187

PROTECTED BLADEl 4Filed Feb. 19. 19:54

.Ly 16' 10\` 13 fr f If//vewnzf Patented Jan. 8v, 1935 1,991,181 Piron-:cran Buma Henry J. Gaiman, mane. N. Yi', mimo: u

Gillette Safety Razor Company, Boston. a corporation of Delaware Mall..

Application February 19,1934, sei-1d No. 711,33:

4 emma (cl. :os-1s) 'rms invention consists 1n a-safety razor blade having a new and improved protective cover so designed as to insure it against'becoming dulled or rusted up to the time that it is actually pre- 5 sented to the razor by the user.

In handling safety razor blades under commercial conditions of distribution and storage and in the more or less casual handling by the user the extremely keen ilne edge of the blade is likely to becomedulled by being brought into contact with its wrappings or other objects before the blade iis actualy clamped in its shaving position in the razor. On this accountvthe best and more skillful efforts of the manufacturer in sharpening blades are often brought to naught because of the diiiiculty of preserving intact the very fragile andldelicate structure of a blade edge which has been brought to the keenest possible shaving condition. Safety razor blades are also subject to rusting and corrosion while in transit and in storage, particularly when marketed in the tropics. The protected blade of my invention is rendered practically proof against rusting and corrosion bythe novel cover of my invention.

With these conditions in view, anl important feature of the present invention consists in a novel cover of waxed paper or the like comprising sheets shaped to permit the presentation of the protected blade to the razor and projecting outside or beyond the cutting edge of the blade and protecting it from direct contact until such time as it has been fully presented inor upon shaving position in the cap or guard of the safety' razor by the user. I have discovered that such a protective cover may be made to adhere to one or both surfaces of a safety razor blade in a clinging or slipping manner of engagement, so that it is readily removable by being drawn or slipped on' the blade.

Preferably and as herein shown each blade is provided with protective cover sheets secured to its opposite surfaces'. and with'. ,the edges of the sheets unjoined and projecting beyond the sharpened edges of the blade. The cover thus employed to protect the blade is provided with a tab or other portion whereby the user may seize the cover and withdraw it from the blade. i

The cover of my invention is particularly adapted for thin flexible blades, internally apertured Y to receive the usual blade positioning projections of a safety razor. The sheets of the cover are longitudinally slotted in registration with the apertures of the blade which they enclose. The slot is of such dimensions and so located as to clear the blade-locating projections of the razor, thus, in the first place, adapting the protected blade tobe presented to the razor and located Vby its projections, and in the second place. re-

taining the blade in the razor while the user withdraws the protective cover therefrom. It will be noted thatthe sharp edges ofthe blade` are thus protected until after the blade has been presented in its iinal location in the razor and is no longer liable to be damagedl by contacting with its wrapping or with any part of the razor to the serious detriment of its keenness.-

Particular features of my invention are a slideoif cover or package for the blade; a cover adapted to provide a protecting margin alongside a cutting edge to defend such edge; a cover, the

continuity of which is so interrupted as to 'per-r y mit a bladev adapted to be connected to a blade holder to be located thereon without removing the cover and to permit the cover to be withdrawn while leaving the blade connected with its holder. 'I'hese and other features of the invention will be best understood and appreciated from the following description of a preferred embodiment thereof, selected for purposes of illustration and shown in the accompanying drawing, in which,-

Fig.' 1 is a plan view of one type of safety razor blade in connection with which the invention may be employed;

Fig. 2 is a plan v iew of the razor blade; .L

Fig. 3 is a plan view of the blank-which may be folded to form the cover shown in Fig. 2;

Fig. 4 is a view in cross-section-of a form of cover;

Fig. 5 is a fragmentary view in side elevation, of two protected blades in superposedrelation;

coverfor such a vand It will be understood that my invention is in.

aneth-ure no sense limited in its use to any specific type of safety razor blade but is of general application to any internally apertured orv perforated blade. The particular blade shown in the accompanying vdrawingl represents merely one double-edge safety razor blade of well-known commercial type. The blade l0 is of thin flexible steel sharpened at its opposite edges 12 for cutting. 'The blade is provided with three spaced apertures 14 adapted to receive the 'projecting blade-locating studsof one of the clampingmembers' of the safety razor in which it is'to be used.. As' herein shown the t apertures '14 have curved end'y walls and oppo- 35 Aextendbeyondor outside the cutting edges 12 of upon the cap or upon the guard of therazor,V or partly upon one of these members and partly upon theother. j J

It is proposed to enclose each'blade 10 in a v protective cover of thin sheet material, such as waxed paper, of the general charactershownin Fig. 2 which may be formed byfolding onan intermediate transverse line the flat blank shown iniFigeff3- l- The; :folded blank presents, a cover fhavingsideg pertioneisspaeed from eeen other lportion 20...A r y -.cover;radiacentfstoggthe foldy vertex thereof and -isnormallydirected at `its inner end toward the @sloti 18,1 although.; it bent outwardly into vbyga longitudinal V.slot v18 which opens outthrough cna-.endgof the;y cover... At: the other end ofthe coveiftheiside. portions 16 `.are joined by an end lrectarigulartab 221s cut in the 'the position shownginjlg. 6', so that it may be grasped conveniently .by the user, as will presently aThe l,cover is. 'somewhat longer the overall length of-theblade 10, so-that the lattermay be completely; enclosed therein exceptffor ythe portinexposed through-the. slot .18. and thisin the present instance includes. the body of the apertures14. Thegfre'e edges of the two parts of the cover overlap and register with each other and the blade., The lappedy ufr-the cover, Atherejforefffserve to defender .protect the sharpened cuttingaedges-of the blade. The cover may be "conveniently formed'` of grease-proof material, such,-as `waxed paper. and the` blade 10 maybe lsuitably -treateduwithfprotective .layers of oil or .other,;`.rustpreventing coating which, besides preventing the A bladeefrom rusting, causes the cover to adhere fto the surface of the Vblade and :to be maintained in slipping engagement there- .The cover maybe either open along its`outer longitudinal; edges, or, itmay be formedv as a bag, orsheath-26as shown in Fig. 4. The cover shown -inFig.4 is similar to that of Figs. 2 and 3 and is provided with a longitudinal slot 28, but its longitudinal edgesare. secured together instead of being `separate andy disposed in overlapping registration as in Figs. 2 and 6.

One .sheet ofthe protective cover is provided with the inwardly` extendingA tab 22 and the other -with a .-tab 24 `whichoriginally projects into the closedvendof the,slot i8.- It is contemplated that vv,theproteeted blades will be assembled in a. con- ,tainerf or package one above `the other as suggested in- Fig. 5, The user ymay withdraw ythese Vblades from'the package one by one, selecting 'alwaysthe -uppermostblade in the stack.

For thispurposefthe tab 22 may be folded outwardly intothe position shownv in I"ig..6.l This may be done by theuser as he withdraws the blade or it may be.done by the'tab 24 of the uppermost blade as it iswithdrawnfrom the stack. To this end, the, tab imney heralded so that it extends forwardly toward theend of the protected blade in position to catch upon` the tab 22 of the blade cover beneath it during its movement of withdrawal.

'Ihe slot 18 in the coverl is of suilicient Lwidth freely ed clear the blade-locating projections from stud 30 and a pair of spaced blade-locating studs 32, one on each side of the threaded stud. The cap 28, as will be well understood, is employed in cooperation with a guard member having holes or bores for the reception of the three studs and a threaded handle cooperating with the threaded stud 30 to draw the cap and guard into a clamping `Vrelation in which the thin flexible blade is. supported on both sides adjacent to its cutting edge. f

It will be seen that the protected blade with its cover may be placed upon thestuds of the cap 28, beingr located thereby accurately in shaving position and so held by the engagement of the studs with the walls of the apertures 14. When the protected blade has been so positioned the user has only to grasp the tab 22 or the end 20 of the cover and draw it endwise, thus sliding the cover from ofi' the blade and leaving it free upon the cap and ready for shaving. The protected blade of course may be presented to the cap either .endabout and the adhesive engagementrof the grease -or oil upon the blade does not interfere with the withdrawing of the cover but permits it, readily to slide from the blade. It will be noted, moreover, that by thus presenting such blade its edges are safeguarded against the possibility of lbeing dulled by contact with any part of the razoror any part of the cover and that the blade is'expo'sed for the Yflrstvtime after it has 4 been safely located in a part of the razor in which it is to be used.

The modified cover/shown in Fig. 4 is similar to that already described except that Y its longitudinal edges are united so that the cover as a whole is of sheath form instead of having its longitudinal edges free and unconnected. The 1 blade-locating aperture as distinguished from a blade like that shown which has a plurality of apertures.

' The subject matter of the present application is disclosedbut not claimed in mv prior vPatent No. 1,851,043, granted March 29, 1932.

Having thus described my invention what I claim as new and desire to secure by letters Patent of the United States is:-

. 1. -A protected blade internally apertured for engagement with the locating projections of a safety razor' and having a cover sheet attached to one surface and extending beyond the cutting edge of the blade and which is longitudinally slotted to clear such projections when the blade is placed in" the razor, thereby permitting the cover sheet to be drawn off the blade by endwise movement.

apertured to receive the locating projections of a safety razor and covered by Aa U-shaped cover sheet on each surface extending beyond the\cut ting edges of the blade and one end of the blade.

, o Y 2. A protected double-edged blade internally .7

4. A protected double-edged blade for safety t and adapted to be drawn oi! the blade while the latter is held in position in the safety razor.

3. A protected double-edged blade internally apertured to receive the locating projections at a safety razor and provided with a cover sheet on each surface having a connecting portion covering one end of the blade and spaced side portions covering the cutting edges of the blade and separated at their free ends to clear the projections of the razor, thereby'permitting the cover sheets to be simultaneously removed from the blade by endwise movement while the blade is held in the razor.

razors, having a blade-locating perforation within its periphery, and covered by protective sheets having a connecting portion folded to enclose one end of the blade and side portions extending therefrom, shaped to overlie the edges of the bladeand spaced to clear the perforation of the bladel thereby permitting the protective sheets to be pulled endwisefrom the blade to expose its edges while the blade is positioned in the razor by a projecting member which enters said bladelocating perforation. f

HENRY J. GAISMAN.

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