US2171455A - Slider for hookless fasteners - Google Patents

Description

Aug. 29, 1939. J. P. ROADFUSS SLIDER FOR HOQKLESS FASTENERS Filed June 27, 1958 as n??? Patented Aug. 29, 1939' PATENT OFFICE SLIDER FOR HOOKLESS FASTENERS John P. Philadelphia, Pa., assignor to Philstan Products Company, Philadelphia, Pa., a corporation of New Jersey Application June 27, 1938, Serial No. 216,10

, 4 Claims This invention relates to sliders for separable fasteners, and has for a particular object thereof the provision of a device of this character in which thorough reinforcement of all vulnerable parts is afforded without any material change in the ordinary structure of such devices.

The body of the ordinary separable slider fastener is constructed from a single blank and a rivet holding the wings of the blank in proper is ordinarily of thin metal, the rivet has been depended on to a great extent as a means for resisting torsional strains applied thereto.

Slider fasteners are subjected to two types of destructive strains:

(1) That which tends to open the fastener by bending the sections apart at the stem of the Y-shapedchannel provided, and

(2) A transverse strain which tends to displace the guiding elements interiorly of the fastener which likewise serve as ameansf for holding the channels in properly spaced relation at the branch of the Y.

An important object of this invention is the,

provision of a structure which will fully resist both types of strains and which, accordingly, will have a relatively long life as compared to sliders of the ordinary construction. A further and more specific object of the invention is the provision of means to absolutely prevent displacement of the spacer flanges forming the inner portions of the branches of the Y-shaped groove. v

These and other objects I attain by the construction shown in the accompanying drawing wherein, for the purpose. of illustration, 1 have shown a preferred embodiment of my invention and wherein:

Fig. l is. a plan of a blank from which the slider body is formed;

Fig. 2 is a similar view of the partially formed slider body;

Fig. 3 is a perspective illustrating a further step in the forming of the slider body;

Fig. 4 is a side elevation of the formed slider body;

Fig. 5 is an elevation of the rivet employed;

Fig. 6 is a vertical sectional view through the completed slider; V

Fig. 7 is a front elevation thereof; and

Fig. 8 is a section on line 8-8 of Fig. '7.

Referring now more particularly to the drawing, the slider is formed from a blank 10 comprising a pair of wings II and I2 connected by a neck l3, which neck has centrally disposed relation. Due to the fact that the slider body oppositely extending spacer flanges l4. This type of construction is general insofar as just explainedi In accordance with my invention. I provide at what is to be the inner surface of the wings in the completed fastener, Y-shaped 5 grooves IS, the arms l6 of which converge inwardly from the points of junction of the wings II with the neck l3 and the stem ll of which projects to the approximate center of the wing body, these grooves being formed by pressing the 10 metal and producing reinforcing ribs upon the exterior of the wings. In the crotch of the Y in each wing, I form the opening l8 for the reception of the shank IQ of a rivet 20, and at the outer end of the stem of the Y in one wing I form an opening 2| for the reception of a nib 22 upon an angular extension 23 of the head of the rivet. The spacing flanges II are made of substantially the same width as the length of neck l3, and in assembling the fastener these flanges are bent inwardly at an angle such that their opposite end edges will engage in the grooves forming the arms it of the Y. The wings II and i2 are then bent downwardly so that the edges of these flanges are received and secured tightly in the grooves by pressure, which arrangement, obviously, prevents any possible displacement of the flanges, while the flanges still retain their normal function of regulating the spacing of wings II and I2. This regulation is further accomplished in the usual fashion by flanging the outer edges 24 of the wings as indicated at 25. The head portion of the rivet is notched as at 26 to receive the usual pull-tab 21 for use in operating the slider.

It will be obvious that with a construction of this type displacement of the spacing flanges I4 7 becomes impossible, and it will also be obvious that the ribbing at I! afl'ords considerable reinforcement for the extended portions of the wings, thus eliminating necessity for any extended underlying portion of rivet 20. Not only does the engagement 'of the spacing flanges in these grooves prevent displacement of the flanges themselves through their engagement with the wings, but, likewise, these flanges obviously serve to prevent transverse displacement of the wings. This, obviously, enables manufacture of the slider from considerably lighter metal than could otherwise be employed, and enables use of the simpler form of rivet above referred to. This rivet may, therefore, be of the relatively simple notched-in type, as indicated at 28.

Since the construction is capable of considerable modification without in any manner departing from the spirit of my invention, I do not wish to be understood as limiting myself to the specific construction herein illustrated except as hereinafter claimed.

I claim:

1. A slider fastener comprising confronting wings having flanges on their outer edges, said wings being connected by a neck and spacer flanges on said neck, said spacer flanges disposed between said wings in V-formation and combining with said wings and the flanges on the outer' edges of the wings to produce a Y- shaped channel, said wings having grooves at their inner faces receiving the edges of said spacer flanges.

2. A slider comprising confronting wings connected by a neck, said wings having Yshaped grooves the terminals of the branches of which extend to approximately the junction of said neck and wings, said neck having flanges disposed between said wings and engaged in the branches of said grooves, the outer surface of said wings being ribbed correspondingly to said grooves.

3. A slider fastener comprising confronting wings having flanges on their outer edges, said wings being connected by a neck and spacer flanges on said neck, said spacer flanges disposed between said wings in V-formation and combining with said wings and the flanges on the outer edges of the wings to produce a Y-shaped channel, said wings having grooves at their inner faces receiving the edges of said spacer flanges, said wings having openings adjacent the apex of the angle between the grooves, and one of said wings having a further opening spaced from the junction of the grooves and centrally disposed with respect to said wing, and a rivet extending through the first-named openings and having an angular extension provided wth a nib engaging in the last-named opening and adapted for the reception of a pull-tab.

4. A slider comprising confronting wings connected by a neck, said wings having Y-shaped grooves the terminals of the branches of which extend to approximately the junction of said neck and wings, said neck having flanges disposed between said wings and engaged in the branches of said grooves, the outer surface of said wings being ribbed correspondingly to said grooves, said wings having openings in the included angle between the branches of the Y-shaped grooves and adjacent the junction of said branches, and one of said wings having an opening at the terminal of the Y-shaped groove, and a rivet having a stem extended through the first-named openings and an angular extension provided with a nib engaging in the last-named opening, said rivet being adapted for the reception of a pull-tab.

JOHN P. ROADFUSS.

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