US2307711A

US2307711A - Slide fastener

Info

Publication number: US2307711A
Application number: US405857A
Authority: US
Inventors: Louis W Schaaff
Original assignee: Waldes Kohinoor Inc
Current assignee: Waldes Kohinoor Inc
Priority date: 1941-08-07
Filing date: 1941-08-07
Publication date: 1943-01-05
Anticipated expiration: 1960-01-05

Description

Jan. 5, 1943. L.. w. scHAAl-F SLIDE FASTENER Filed Aug. 7, 1941 l////////// l l o/s 14'( SCHAAFF Patented Jan. 5,1943

2,307,711 l l r SLIDE FASTENER Louis W. Schaan', Jackson Heights, N. Y., assiglior` to Waldes Koh-I-Noo Inc.,

Long Island City,

N. Y., a corporation of New York Application August 7,` 1941, Serial No. 405,857

12 claims.

This invention relates to improvements in slide fasteners, and in its more specific aspects, to improvements in sliders therefor and in the construction and mode ofsecurement of the pull tabs for operating the same.

Considered generally, sliders as heretofore constructed employ for their operation pull tabs of rigid metallic construction which are secured to the slider by a rivet or like securing means whose head protrudes a substantial distance from the front face of the slider body, or which is otherwise provided with a hook-like extension also projecting out of the plane of the slider front face. Obviously, such securing means add to the overall depth and bulk of the slider body, and moreover, pull tabs of the stated character in many cases are bent or deformed in use to a degree impairing if not destroying` their usefulness. Where the prior sliders employed pull tabs of a iiexible nature such as chains or fabric tapes, their securement to the slider body generally followed the same mode of `securement characterizing pull tabs of the rigid metallic type, with the disadvantages attendant to thelatter.

The present invention contemplates and aims to provide a novel and improved slider -and pull tab assembly employing ailexible type pull tab which'overcomes the above-noted disadvantages of the prior devices, while at the same time providing la slider assembly of minimum overall depth which can be readily manufactured and assembled in quantity, practical and eective in operation, which requires as its fastening other rivet head formation extending from the plane of the front face of the slider body, and

means no hook-like or which is commercially" which in addition incorporates an effective mode A of securing the pull tab to the slider body.

The invention also has for a major object the provision of a novel slider construction which lends itself admirably to the use of pull tabs of iiexible nature, and also to pull tabs which may be operated from either side of the sliderl when the fastener is applied to reversible garments and .which further of itself represents an advance and improvement in slider body construction and design.

Moreover, the slider and pull tab construction of the present invention is one of pleasing design and appearance, and is of the character p'ermitting a high order of embellishment not possible with sliders of known construction.

Other objects will be in part obvious and in part hereinafter pointed out in connection with on the other hand the following analysisv of this invention wherein is illustrated an embodiment of the inventionl in detail.

In the drawing- Fig. 1 is a plan view-of fastener employing aslider which incorporates the improvements of the present invention.v

Fig. 2 is a partsection through the slider illustrated in Fig.-V 1.

Fig. 3 is a horizontal 3 3 of Fig. 1. l

Fig. 4 is a part sectional view through aslider employing a modied form of pull tab.

Fig. 5 is a section view, similar to Fig. 3, illustrating a modified form of`slider construction.

Figs. 6 and 'I are respectively front and side views of a modified formofslider and pull tab assembly in accordano tion. i

Referring to the drawing wherein like reference characters designate like parts throughout` the several views, reference characters |0, Il` designate conventional fastener-elements arf ranged in row formation alongthe edges of opposed stringers I2, I3, the latter being in turn" secured along the edges of an openingfina garment or like article which is yadapted to be closed upon interlocking of meshing of the elements, and to be opened upon disengagement of the elements. As is well known the fastener elements are adapted to be interlocked and diseng4r gaged by a slider S which embraces the elements and which operates, when moved in one direction, generally upwardly, to progressivelyforce the elements into kinterlocking engagement,` and when moved in the opposite downwardly, to progressively disengage the elements.

The slider S .which incorporates the improvements of the present invention is shown to have 1 i the general form and mode ofoperation ofthe 1 slider disclosed in my copending application Se f rial No.'395,479, filedy May 2'7, 1941, insofaras the self-locking features of ,the latterandits l ability to dispose the rows of disengaged fastener elements parallel yupon their exit from the head opening provided therefor, is concerned. However, it is tol be clearlyl understood that .the present invention is not disclosed in my prior application aforesaid but is applicable of the so-called standard vided with a Y.shaped race for the fastener elements and which in operation disposethe disengaged fastener elements fanwtse.

NT orifice i a portion of a slide view taken vertically section taken alongwline with the 'present inven- "direction, generally c limited to sliders of 'the form f l as well tosliders design which are'pro- As illustrated, the slider body S is constituted by front and rear plates I5, I6 each having marginal side flanges I1, I8, and an elliptically shaped divider or separator for the fastener elements generally designated 20, the latter being disposed well within the slider body and at or near the geometric center thereof. The slider body is providedwith a top or head opening for ,the entry and exit of disengagedV elements and with a bottom or tail opening for Ythe entry and relate to the construction of the divider 20 and to the manner of securing a pull tab in the nature of a exible cord, thong tape or the like thereto. Referring yparticularly to Figs. 2 and 3,wherein the improved divider construction is illustrated, one of the slider plates, such as the rear or under plate I6, has `integrally formed thereon as by a die-.forming operation an elliptical divider section 20a having a base portion 2l terminating in aninwardly directed'abutment shoulder 22, and a sleeve-like extension 23 which projects -relatively upwardly from the base portion 2|. The heightofthe baseportion is one-half that of the complete divider, the height of the sleeve portion being somewhat greater' than the height of the base portion for the purpose to be described.

'I'he divider section 20a as constituted by the y base and sleeve portions 2|, 23 thereof is formed witha through bore lor aperture which `may be of circular or of substantially circular section, the

lrelative turning of the plates.

aperture. widening out at its end adjacent 4the f rear.plate .I6 along av gentle curvature, thus to provide a curved seat or vbearing to be hereinafter referred to. l

The related front plate I5 carries a'n integral divider section 20h voi! height half that required forthe complete divider, such' being preferably die-formed therein to extend from `the underface of the plate. Divider section 20h is provided with a bore or opening, the inner end of which is of a size and interior formation as to snugly receive the sleeve portion `23 of the companion divider section 20a, the outer end of said opening being enlarged along a gradual curvature,

In assembly, the divider section 20h is threaded or telescoped on to the sleeve extension 23 of divider section 20a, and the plates I5, I6 are forced relatively towards each oth'er until the end face of` divider section 20h abutsA against and seats on shoulder 22. With the partsassembledk as aforesaid, the slider plates are spaced a predetermineed distance as required. Due to the sleeve extension 23 being formed long, its end projects, slightly beyond the face of 'the outer plate I5. Thereuponthi's projecting end is deformed or .upset to ra. degree causing it to bear tightly on the curved, enlarged end of the through opening of divider section 20h. The

slider body and plates I5, I6 are securely held in properly spaced relation as is required.

Upon the assembly aforesaid, the divider sections cooperate to provide a tubular divider in which the bores or openings of the divider sections form an opening through the slider. Moreover, by reason of the disposition of the divider sections at the approximate geometric center of the slider plates, the assembled slider body is substantially crush-proof to pressures that tend to crush or impair the utility of sliders of conventional construction.

Preferably, the outer face of each slider plate is countersunk simultaneously with the formation of its dividersection, to provide a circular recess 26 disposed Labout but on the other side of the plate from the divider section carried thereby. Thisrecessing of `theplates, in conjunction with the enlargement of the divider section bores adjacent the relativelyouter ends thereof, provide substantial space inwardly of thel outer plane of the slider plates for the` accommodation of lthe pull tab end or the securing means therefor.

With the construction so far described, it will be seen that the slider is rivetless in the sense that no separate rivet, isemployed to secure the front and rear plates of the slider in their required spaced parallel relation. Moreover, the divider itself provides the sole means for securingthe plates in properly spaced relation and, by reason of its construction andrnon-circular cross-sectional shape, also'functions to prevent This rivetless construction makes for extreme thinness of slider body and due to the absence of any protruding head or equivalent means for securing the slider plates together results in a slider causing no' appreciable bulging `when worn on either outer or inner garments.

The slider body construction as described lends itself admirably to the securing of pull means thereto, particularly when such means are of the pull cord type, which by reason of their flexibility permit the slider to slide without they customary twisting friction characterizing standard pull tabs of rigid construction; Referring to Fig. 2, the pull cord 28 there shown is of the flexible type,'being woven from textile strands or being in the form of a leather thong, or being fashioned from plasticvmaterial.l One end of the flexible pull cord is threaded through the openended bore of divider section 20a, and its termi nal 4end may' be knotted butxis vpreferably enclosed within a bead 30 of diameter larger than the through bore. By reason of the countersinking of the rear plate and the enlargement of the end .of the cord receiving bore adjacent thereto, vthe bead 30 normally seats against the Y curved seat formed at the relatively inner end-of feo extra length of the sleeve extension 2 3 is taken up in `the upsetting or riveting-over operation, so that following final assembly, the sleeve is wholly confined. within the front and rear planes of the the bore and hence -the bead does not protrude out of the plane of therear face of the slider, but on the other hand is `accommodated within the space provided by the countersinking and enlargement of thebOre-end. The other end of the pull cord 28 may be provided with a bead 32 of relatively greater diameter, which is readily grippable for moving the slider in either direction along the rows of fastener elements.

Referring to Fig. 4 wherein a modified form of pull cord is illustrated,'the pull cord 34 is of sufficient length as to extend equally from both faces of the slider, its intermediate portion being disposed within the bore of divider section 20a. The pull tab is provided adjacent each' face of the slider with metallic rings or bands 35, 36 'of Without further analysis, vit seen the .invention provides 'a slider; for lslide fasteners" diameter insuringl :that lthe `tab cannot lbe separated frornthe slider when pull is exerted on either end.

to reversible garments. Thus, bythe provision of a unitary pull tab having ends projecting from both faces of the slider, the latter may be actuated from either face of the garment,depending upon which side is disposed outwardly. In Fig. there is illustrated another form of` slider employing a modified construction ofv di-Y vider functioning as a spacer for the slider plates. Such a slider is constituted by spaced plates 40, 4I of identical construction, the outer faces thereof being each provided with a countersunk recess 42 of circular formation, each recess being pierced to provide an elliptical aperture. A separately formed elliptical divider (and spacer) element 43 is adapted to extend between the plates. the ends being undercut as at 44 to provide shoulders which are spaced slightly from the end edges thereof. With the divider element being extended a slight distance beyond the ends of the shoulders 44, the extending end portions are adapted for deformationv during assembly. In the assembly operation, the slider plates 40, 4I are threaded over the deformable ends of the divider 43 until they bear against the end shoulders 44, and thereupon the extending ends are upset or riveted over in the manner shown to secure the plates 40, 4I in their spaced parallel relation as is required. It is noted that the ends of the divider upon their upsetting seat in the countersunk recesses 42 and thus do not the beaded end of the pull cord is appropriately accommodated so that its securing bead or equivaient is disposed within the planes of slider.

Referring to the further modification illus-l trated in Figs. 6 and 7, the divider there illustrated may be of the sectional character illustrated in my copending application aforesaid and inGOrp'orating V`effective 'and .practical -"means for securing the sliderfplates in theirspaced parallelrv relation, and that vthis vconstruction, lends itself admirablyl to the securingofgpullltabs of the flexible type to the sliderboiy.A ,Moreoven slid,- ers constructedin. accordance kwith the invention` .have minimum thinness and overall bulk by. .10"

reason of the fact .that theslider v.ls..devoid of any rivety or Jrivet head lwhich protrudesfsub-I stantially. fromthe",l ,uppery lor .linden yfaces of the slider body. Hence, not only .a sliderof extreme thinness is provided, butfalsdnov appreciable bulging of garments disposed overthehgarmrent.

fastened by sliders -of the presentinvention can result. k i

Moreover, the present invention provides a double-sided unitarypull tab for a reversible slider which can be used with reversible garments and thus represents adistinct advance in the art lof sliders adapted yfor reversible use.

As will be apparent from Figs. 1 and 6, .for example, the slider` of the present invention is of pleasing design and appearance, andprovides in addition substantial face area for embellishment employs a securing rivet extending through the divider half sections which operates to secure the slider plates 5|, 52 in spaced parallel relation.

y The head 53 of the rivet 50 is adapted to seat in a circular recess 54 countersunk into the front `fate of one slider plate 52', the ccuntersinking in the modified form of the invention under description being appreciable so as to provide a relatively deep recess for the rivet head.

By reference particularly to Fig. 6, the rivet head 53 is in the nature of an elongated ridge, the outer surface of which extends along a curvature, whereby only the mid portion of the head extends out of the plane of the upper or front face of the slider.` The head is` provided with a transverse opening for the reception of a pull tab 55 of ribbon or tape-like form, preferably of textile material, which is threaded through the rivet opening and fastened to the rivet head by a ring or clip 55. The color of the ribbon-like pull tab may be matched with the color of the garment to which the fastener is applied, and hence a slider and pull tab assembly having'an attractive and pleasing appearance is provided.

when and if such is desired. y

As many changes could be madeinl carrying out the above constructions without. departing from the scope of' the invention, it is intended that all matter contained in the above description, or shown in theaccompanying drawingr shall be interpreted as illustrative and` not in a limiting sense. l

I claim: f

l. A two-part slider 4for slide fasteners comprising front and rear plates having marginal side flanges, one of said plates being provided with an integral divider-section comprising a body portion terminating in an abutment shoulder and an extension projecting relatively upwardly therefrom, the other plate being lprovided with an integral divider section disposed about said extension in centinuationpof saidbody portion and forming with the latter a full depth divider, thel end of the lastnamed divider section abutting said shoulder an'd the end of the exten-` sion providing means operatively securing the divider sections one to the other. and the plates in spaced parallel relation, .whereby said plates with their side flanges andthe divider provide'a race for the engaged and disengaged elements.

2. A two-part slider for slide fasteners vvcornprising front and rear plates having marginal side flanges, one of said plates beingv provided with an integral divider section comprising a body portion terminating in an abutment shoulder and a sleeve-like extension projecting relatively above said shoulder, said body portion and extension being provided with a through opening. the other plate being provided with an integral divider section disposed about said extension 'in` continuation of said body portion and forming with'the latter a full depth divider, the end -of the last-named divider section abutting said shoulder and the 'end of the extension providing means-v oneratively securing the divider sections one to the other and the plates in spaced parallel relation, whereby the secured plates with their side flanges and the divider form a race for the enn gaged and disengaged vfastener elements.

3. A slider for slide fasteners comprising front and rear plates having marginal side manges. the plates being each provided with anaperture, a divider adapted to extend between plates with its ends extending into the plate apertures and being provided near each end thereof with a shoulder against which an adjacent platebears, the ends of the divider beyond said shoulders providing means operatively securing the plates against the shoulders andthe plates in spaced parallel relation, 'whereby the plates, the side flanges thereof and the divider cooperate to form a race for the engaged and disengaged fastener elements.

4. A slider for slide fasteners comprising front and rear` plates having marginal side flanges, the plates being each provided with an aperture, a divider adapted to extend between plates with its ends extending into the plate apertures and being provided near each end thereof with 'a shoulder against which an adjacent plate bears. the ends of the dividerA beyond said shoulders providing means operatively securing the plates against the shoulders and the plates in spaced parallel relation, whereby the plates, the side anges' thereof and the divider cooperate to form a race for the engaged and `disengaged fastener elements, said divider being hollow to provide an opening through the slider for the reception of a pull tab kor the securing means therefor.

5. In a slider and pull tabassembly, a slider comprising separate front and rear plates, a divider providing the solemeans for securing the plates inspaced parallel relation and against relative turning movementand providing an kopening through the sliderwhich opening is enlarged at one end thereof to form a seat, a pull tab extending through the opening and having at one end thereof a bead adapted to engage said seat andthereby to be disposedrelatively inwardly of the outer facel of the adjacent plate.

6. A slider for slide fasteners comprising separate front and rear'plates having marginal side flanges, a tube-like divider of non-circular 'crosssection disposed approximately alt the geometric center of said plates, said divider providing the sole means for connecting, properly spacing and rate front and rear plates having marginal side Y flanges, a tube-like divider of noncircular crosssection disposed approximately at the ygeometric center of said plates, said divider providing the sole means for connecting, properly spacing and g prevent relative turning of said plates and forming with said plates and the side flanges a race for the fastener elements, said divider including a divider section integrally connected with one of said plates, the opening through said divider being shaped to provide a pull tab bearing, and a flexible pull tab extending through said opening and having retaining means disposed substantially within the confines of the relatively outer faces of the plates.

8. A slider for slide fasteners comprising separate front and rear plates having marginal side flanges, a tube-like divider of non-circular crosssection disposed approximately at the geometric center of said plates, said divider providing the sole means for connecting, properly spacing and prevent relative turning of said plates and form- 9. A slider for slide fasteners comprising sepa-y rate front and rear plates having marginal side flanges, a tube-like divider of elliptical cross-section disposed approximately at the geometric center of said plates, for connecting, said divider providing the sole means properly spacing andv preventing relative turning of said plates and forming with said plates and the side flanges a race vfor the fastener elements, the opening through said divider being shaped to providea pull tab bearing, and a flexible pull tab extending through said opening and having retaining means disposed substantially within the confines of the relatively outer faces of the plates.

10. A slider for slide fasteners` comprising separate front and rear plates having marginal side flanges, a tube-like divider of elliptical cross-section disposed approximately at the geometric center of said plates, said divider providing the sole means for connecting, properly spacing and prevent relative turning of said plates and forming with said plates and the side flanges a race' for thefastener elements, said divider having one end integral with one of said plates and its other end countersunk in the other of said plates,A the opening through said divider being shaped to provide a pull tab bearing, and a flexible pull tab extending through said opening and having retaining means disposed substantially within the confines of the relatively outer faces of the plates.

11. A slider for slide fasteners comprising separate front and rear vplates having marginal side flanges, a tube-like divider of elliptical cross-section disposed approximately at the geometric center of said plates, said divider providing the sole means for connecting, properly spacing and prevent relative turning of said plates and forming with said plates and the side flanges a race for the fastener elements, said divider having its opposite ends countersunk into said plates, the `opening throughsaid divider being shaped to provide a pull tab bearing, and a flexible pull tab extending through said opening and having retaining means disposed substantially within the confines of the relatively outer faces of the plates.

12. A slider for slide fasteners comprising separate front and rear plates havingrnarginal side flanges, a tube-like divider of elliptical cross-section disposed approximately at the geometric center of said plates, said divider providing the sole means for connecting, properly spacing and prevent relative turning of said plates and forming kwith said plates and the side flanges a race for the fastener elements, the opening through said divider being shaped to provide a pull tab bearing, andl a flexible pull tab extending through said opening and having retaining means disposed substantially within the confines of the relatively outer faces of, the plates, said pull tab being disposed so that its ends extend to both sides of the slider and said retaining means fixing it against endwise sliding movement through the divider opening.

' LOUIS W. SCHAAFF.