US2077358A - Method of making fastener sliders - Google Patents

Description

April 13, 1937. D. DYRESEN 7 METHOD OF MAKING FASTENER SLIbERS I Filed July 21, 1954 a 8 ,9 [Q86 ice 121a Ingenio? .Dz'draio jgreeen.

Patented APB-13, 1937 UNITED STATES 2,077,358 mz'rnon or MAKING FASTENER smmns Didrick Biilerlca, Mass assig'norto United-Carr Fastener Corporation, Cam'- braige, Mala, a corporation of Massachu '0 Application July 21-, 1934, Serial No. 733,368 4 Claims. (on. 29-1-18) My invention aims to provide improvements in the method of making sliders for use with multiple fasteners. I A

In the drawing, which illustrates a preferred 5 embodiment of my invention: I

Figure 1 is an 'elevational view of a portion of multiple operable fastener installation showing aslider made by my improved method;

Fig. 2 is a side elevation of the slider;

Fig. 3 is a plan view of a portion of a strip sfiowing the method of forming the reinforcing.

Fig. 4 is a plan view of a portion of the strip showing the method of forming and blanking the slider body after the reinforcing rib. has bee formed;

Fig. 5 is a side view of the blank as it appears when out from the strip; Fig; 6 is a section of the slider taken on the line H of Fig.1; and

Fig. 7 is a section of the slider taken on the line 1-1 of- Fig. 2. 1 J Referring .now to the slider selected for illustration of my invention, I have shown, in Figs. 1 5 and 2, a slider constructed by my improved method hereinafter described. The slider has a body formed from a single piece of sheet metal without the use ofrivets or other pieces to stiffen and strengthen the body as has been necessary here- .30 tofore. The particular slider illustrated has a top plateportion I and a bottom plate portion 2 spaced a predetermined distance from the top plate portion. Each plate portion has its side edges turned at substantially right angles to form flanges 3 facing each other and spaced slight distances apart to permit passage of the stringers 4 and 5, when the slider passes over the fastener elements 8 shown in Fig. 1. The plate portions I and 2 are joined together at one end by a hollow rib I which is more or less U-shaped and extends at least part way along the outer faces of the plate portions I and 2. This rib has sides which are preferably flat and relatively close together,

thereby stiffening the slider body so that the plate portions I and 2 are held in fixed planes'as against any ordinary stresses which may be exerted upon them in use. That portion of the rib I located at the bottom of the slider, or in the bottolnjplate portion 2, is less pronounced thanat the top side thereby overcoming any objectionable proiection on the-inner 'side of an installation to which the device is to be applied. The

rib portion at the top plate I may serve as a means to receive and hold the usual pull tab 8, esshowninl igs. 1and2. i

The plate portions are wider at the end where they are joined together by therib thanthey are at their free ends (Fig. 7). This is for the purpose of providing for the necessarydiverging channels. Cooperating with the flanges 3 to form 5 these channels are a pair of projections 8 extending from the rib toward the other end of the slider body. I have tapered these projections so that when they are bent together they form a which form the rib I, in this illustration extending downwardly from the visible side. Step E isv the final drawing operation upon the rib and 20 includes swaging a pair of depressions onopposite sides of the rib which later form the projections 8. These depressions become regularly deeper toward their outer ends and are deepest at their ends. The next step F consists in piercing the holes 9, which mark the free ends of the plate portions I and 2 and leave a small connecting link I0 between the slider blanks so that they may be fed in a strip through the press. In operation F I also pierce out the portions I I, thereby delineating the ends of the plates I and 2 which are adjacent to the neck portion when the. slider is completed. It will be noticed that one 7 end of the rib is tapered to a comparatively thin point. plate. It also extends further toward the free end of the slider than the rib on the other plate. This is because it is necessary to have a more pronounced projection on the front plate for the purpose of attaching the pull member. This pierc- 40 I ing operation also cuts away the portions of the strip around the depressions leaving the projections 8, which taper towardtheir free ends as described above. In step G, I commence the forming of the side flanges 3. This is a combined 45 drawing and bending operation which results in making the flanges thinner than the plates when finished. After the first flange-forming operation as at G, the sides of the plate portions I and 2 are freed by the blanking operation as at step H. During this operation the flanges'3 are com-' pleted. At step I, the portions I2 of the rib, between the projections 8 and the plate portions This is the end that lies along the back' 35 I of the projections. This is for the purpose of making the rib more rigid and of presenting a heater and more compact finished slider. The final operation in this particular series is that of 5 separating the partly finished slider from the strip as at [3 in step J.

Now there remains the bending of the rib to make the plates I and 2 lie in parallel planes. This is done so that the plates exactly overlie one another and their flanges extend directly toward each other with a space between them to permit the passage of the fastener stringers. At this point the projections 8 are bent toward each other until they meet, their tapered ends form- 16 ing a neat and smooth joint. The final step is that of sizing the slider to the very exact dimensions demanded by the nature of the task it is to perform. The pull-tab may be attached to the rib on the front face of the slider by any suitable 20 method. I prefer to drill holes in the rib to receive the connecting link of the tab (Figs. l

and 2).

The slider I have described is simple, sturdy and neat in appearance. By virtue of its rib it will resist unusual strains in all directions. The method I have invented for making the slider is novel and simple, easily and inexpensively performed.

While I have illustrated and described a form of my invention, I do-not wish to be limited thereby, since the scope of my invention is best defined by the following claims.

1. The method of forming slider bodies of the class described having opposite spaced apart wings and means forming diverging channels comprising subjecting a strip of metal to a series of drawing operations to form a relatively narrow rib, blanking thestrip to form the wings, each wlngincluding a portion of said rib, piercing the strip at predetermined places with respect to said rib for forming the diverging channel-forming means, forming flanges on said wings, and bending the ribs between the wings until said wings lie in opposed spaced relationship.

2. The method of making a slider body of the class described which has opposed spaced-apart plate portions connected at one end of the slider by a stiffening rib which comprises subjecting a strip of metal to a series of drawing operations to form a relatively narrow rib, piercing the strip at predetermined places with respect to said rib, forming the plate portions adjacent to the opposite ends of said rib, blanking the slider body from said strip and then folding the blank at a point between the ends of the rib, thereby bring- 4 pair of apertures adjacent each end of said rib and spaced therefrom a predetermined distance, piercing said strip in such a manner adjacent said depressions as to leave a pair of relatively thin projections formed from the depressed portions and extending from opposite sides of said rib, blanking said strip to form the plate portions of the slider, said plate portions being located at opposite ends of the rib and each plate including a portion thereof, bending said thin projections toward each other on that side of the strip away from said rib, and bending the rib at a point between the plate portions so that said plate portions lie in parallel planes.

4. The method of making a slider body of the class described which comprises subjecting a strip of metal to a series of drawing operations to form a relatively narrow hollow rib of predetermined length extending lengthwise of said strip, blanking out portions of said strip to form a pair of projections extending from opposite sides of said rib at a point near the mid-portion thereof, delineating the plate portions of the slider so that they lie one at each end of said rib and each including a portion thereof and in the same operation commencing the formation of flanges along the opposite sides of said plate portion, blanking out further portions of said strip adjacent to the sides of said plate portions and completing the formation of said flanges, swaging the portions of the rib between the adjacent ends of said plate portions and said projections from the ribs so that a tubular portion is formed at each side of said projections and in the same operation bending said projections toward each other, cutting the slider blank from said strip and bending the rib at a point between the plate portions untilthe plate portions are in. parallel planes, the flanges on said plate portions extending toward each other and the projections of the rib extending into the space between the plates.

DIDRICK DYREEN.

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