US2316133A

US2316133A - Slide fastener

Info

Publication number: US2316133A
Application number: US405858A
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: 1943-04-06
Anticipated expiration: 1960-04-06

Description

April 6, 1943. f L. w. SCHAAFF 2,316,133

' VSLIDE FASTENER y Filed Aug. '7, 1941l Patented Apr. 6, 1943 sLmE rAs'rENER Louis W. Schauff, Jackson Heights, N. Y., assignor to Waldes Koh-I-Noor, Inc., VLong Island City, N. Y., a corporation of New York A Application August 7, 1941', serial No. 405,853

i claims. (cl. 2li- 205) lThis invention relates to improvements in slide fasteners, particularly of the concealed type as employed with fly front garments, and to an improved construction and arrangement of pull mens trousers, universally employ the conventional pull tab having a grip portion which is symmetrically disposed along' the longitudinal center line of the fastener slider. As is well known, slide fasteners of the stated character are concealed by a flap which extends in covering relation over the fastener, its slider and the pull tab. To operate the slider, it is of course necessary to raise the flap and thereupon insert the fingers into the fly pocket formed by the fastener stringers and the y for' the purpose of gripping the pull tab. Due to the symmetrical disposition of the pull tab with reference to the slider as l aforesaid, and also by reason of the fact that the longitudinal center line of the slider is generally l disposed closer to the pocket base than to the free edge of the fly, some difiiculty is experienced in obtaining a proper grip on the pull tab, and the slider is accordingly not easily operated.

To overcome the disadvantages asaforesaid, the present invention contemplates and provides a slider, particularly adapted for slide fasteners of the concealed type, provided with a pull tab i which, while concealed by the garment fly in Vconventional manner, is nevertheless more easily and readily gripped than the pull tabs of sliders of known construction and disposition. More particularly, the present invention provides a pull tab having a gripping end which is offset laterally from the longitudinal center line of the slider in the direction of the free edge of the iiy. By this oiset the gripping end of the tab is more readily accessible, and the operation of the slider does not require full insertion of the ngers into the ily pocket or full opening of the pocket as by bending the fly back approximately 90 from its normal plane. Moreover, a slider having an olfset pull tab in accordance with the present invention may be operated by exerting a lateral component of pull on the pull tab and in the direction away from the pocket base, which is of obvious advantage when the fastener is applied to fly front garments.

A further feature of the invention resides in `tab'and preventing slipping of the fingers therefrom, thereby making for easier and surer operation of the slider.

Other objects will be in part obvious and in part hereinafter pointed out in connection with the following analysis of this invention' wherein is illustrated an embodiment of detail.

In the drawing- Fig. l is a plan View of a. portion of a'. slide fas'- tener of the concealed type, the concealing fly being raised to expose the slider, and the` latter being provided with the improved pull tab of the present invention;

Fig. 2 is a transverse section through a slide fastener of the concealed type employing the improved slider and pull tab assemblyof the present invention, the concealing ly being shown in its concealing relation with reference to the slider and fastener;

Fig. 3 is a side elevation of the slider and its improved pull tab; 4

Fig. 4 is a section taken on the line 4-4 of Fig. l;l

Fig. 5 is a detail View illustrating a modied form of securing the pull tab to the slider.

Referring to the drawing, wherein like reference characters designate like parts throughout the several views, reference` characters l0, H designate conventional fastener elements arranged'in row formation .along the edges of opposed stringers' I2, i3, of which Stringer AI2 is secured as by stitching I4 to the garment fabric along one side-of an opening therein, with Stringer this invention in I3 being secured as by stitching l5 to the garment fabric at the other side of the opening. From the stitching I5, the garment fabric extends for a length as to cover the stitching I 4 and thereby forms a fly I6 whichconceals the stringers, the fastener elements, as well as the slider generally designated S associated with the fastener elements. As shown, the garment edge to which the Stringer l2 is stitched is extended to provide anunder flap Il which extends beneath the fastener to a point well inside the stitching l5. As is Well known, the fastener elements I0, Il are adapted to be interlocked and disengaged by the slider S which embraces the elements and which operates.

On the other hand, such are to be regarded as typical of slide fasteners of the concealed type and of conventional fastener elements, respectively, both of which may take other forms than those illustrated.

The slider S is shown to have the general form and mode of operation of the slider disclosed in my copending application Serial No. 395,479, filed May 2'7, 1941, Patent No; 2,312,284 granted Feb. 23, 1942, insofar as its interlocking features and ability to dispose the rows of disengaged fastener elements parallel are concerned. However, it is to be clearly undertsood that the present invention is not limited to sliders of the form disclosed in my prior application aforesaid but, on the other hand, is also applicable to sliders of the so-called standard design which are provided with a Y-shaped race for the fastener elements and which in operation dispose the disengaged fastener elements fanwise upon their'exit from the slider.

Asillustrated, the slider body S is constituted by front and rear plates 20, 2| having

marginal side flanges

22, 23, and an elliptically shaped separator or divider generally designated 2li, which functions also as a spacer for the plates 2d, 2i, being disposed well within the slider body and at or near the geometrical center thereof. The slider body is provided with a top or head opening for the entry Aand exit of disengaged elements and with a bottom or tail opening for the entry or exit of the engaged fastener elements. In the illustrated slider, the front and rear plates and` their side flanges in conjunction with the more or less centrally disposed divider Zi cooperate to provide. an open-ended race for the fastener elements having upper and lower straightway race portions disposed in longitudinal alignment, and connecting branch portions which diverge outwardly from one straightway portion and thence inwardly into the other straightway portion.

The front and rear plates 20, 2l of the slider and its divider element, which latter may be comprised by divider half sections each integral with a plate, or by a separate divider element extending between the plates, are shown to be secured by a securing rivet 25' extending through the slider and which has a rivet headv 26 seating in a circular countersunk recess 2l as formed in the outer faces of both front and rear plates.

Referring now to the construction and disposition of the slider pull tab which forms the subject-matter of the present invention, the improved pull tab generally designated 3@ is of angled or L-shaped construction, having a laterally extending connector leg 3i and a vertically extending gripping end or leg 32. Due to the lateral disposition of the connector leg, the gripping end 32 whichis integral therewith is offset laterally from the longitudinal center line of the fastener body. 'As shown, the gripping end of the tab is of length to extend below the bottom edge of the slider and being of appreciable width thereby provides a substantial gripping area. While in the illustrated construction, the gripping end is offset to the left of the slider center line for use with a right handed concealed fastener in which the fly opens to the right, the gripping end may be oset to the right of the slider center line for use with left handed concealed fasteners which open to the left.

Along the free or outer edge of the gripping end 32 and preferably extending from the under face thereof is a longitudinally extending rib 33 which interrupts the smooth under surface of the gripping end. Thus, the latter may be nrmly gripped, with the rib providing -assurance that the ngers of the operator will not slip in operating the slider. As will be further evident from Figs. 1 and 3, the edge rib of the gripping end of the tab extends slightly to the side of the slider body whereby its disposition as aforesaid does not increase the overall depth of the slider and pull tab assembly.

The preferred form of securing the pull tab is illustrated in Fig. l, wherein the rivet head 2%,

I which, prior to the assembly of the slider and.

which is of solid construction, is pierced to provide a transverse opening for the reception of a tongue d adapted to form the pull tab pintle and which is blanked or cut out of the stock providing the connector leg of ,the tab during the formation of the latter. The tongue 35 is disposed above an opening '3d in the connector leg of the tab, which is of a size and shape to ac,- commodate the lower half of the rivet head 2t. To the side of opening 36 and at right angles to the tongue 35 is disposed a second tongue al pull tab, may be bent relatively forwardly from the plane of the pull tab proper. lIn assembly, the tongue or pintle 3d is inserted into the rivet head opening, whereupon tongue 3l is bent baclr into its normal plane, thus to effect the closing of opening 36 and permanent securement of the pull tab to the rivet head.

According to a modified form of securing the pull tab to the rivet as illustrated in Fig. 5, the rivet head 26a is split and spread outwardly, as indicated in dotted lines, relatively above its head opening provided therein for the reception of the pull tab pintle. The tab pintle 35a may be formed solid above an opening corresponding to opening 36, with which the pull tab'is provided. Upon insertion of the pintle into the rivet head opening provided therefor, the split head is deformed or closed, thereby to close the head opening and securely fasten the pull tab to the rivet head.

Without further analysis it Will be seen that the invention pro/vides an improved pull tab construction and one that is especially adapted for use swith sliders of slide fastenersof the concealed type. By reason of the lateral disposition of the gripping end of the pull tab and its edge rib formation, the tab may be readily gripped without inserting the fingers deeply into the base of the ily pocket, or withoutthe requirement for excessively raising the fly. Moreover, pull tabs constructed in accordance with the invention permit the operation of sliders with which they are associated by the exertion of a lateral component of pull and are thus more readily operable than sliders requiring a straight line pull -exerted through the slider body.

As many changes could be made in 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 the accompanying drawing, shall be interpreted as illustrative and not in a limiting sense. l v

I claim:

i. A slider for slide fasteners provided with an overlying ily for concealing the fastener, comprising front and rear plates disposed in spaced.-

parallel relation, a rivet; extending through said plates, and a pull tab having a laterally extend ing portion pivotally connected to the rivet head and a longitudinally extending grip portion nn set from the center line of the slider infthe direction ot the free edge of the concealing ily.

2. A slider as set forth in claim 1 wherein the outer edge of the grip portion is provided with s rib to facilitate the gripping operation.

3. A slider as set forth in claim 1- wherein the outer edge of the grip portion is provided with a rearwardly directed gripping portion.-

4. A slider for -slide fasteners provided with an overlying ily concealing the fastener, com- 10 pricing front and reu' plates disposed in spaced plrallel relation, `a rivet extending through said plates. and an shaped pull tab. the laterally noms w. scHAm;