US2261302A - Slide fastener key - Google Patents

Description

Nov. 4, 1941. R. J. SMITH SLIDE FASTENER KEY Filed Dec. 30, 1938 I l/l4 ATTORNEY Patented Nov. 4, 1941 UNITED STATES PATENT OFFICE SLIDE FASTENER KEY Roscoe J. Smith, Glen Ridge, N. J. Application December 30, 1938, Serial No. 248,381

- 4v Claims.

It is an object of my invention to provide a key or slide fastener closure which will be more positive in operation than present types due to the structure of the key itself and the process or method by which I manufacture and assemble the same. I also provide a key which is less costly to manufacture and which will have less fracture and breakage than present type of keys in this art. The keys now in use with slide fastener are either die cast ormore conventionally stamped and coined out ofsheets and then bent or folded into final form. This bending occurs at the middle where the smallest amount of metal is available and with resulting tendency to break. My key is characterized by being formed entirely by metal stamping and is so shaped that great strength-is obtained In a conventional punch press process trimming and bending are required and in some cases keys are made by a swedging or coining press process, both of which involve considerable waste of material and metal.

My invention will be more readily understood by reference to the accompanying drawing in 'which like numbers refer to like parts in the several views.

In Fig. 1 is shown an envelopment in plan of one side of one portion of key stamping.

In Fig. 2 is shown a side elevation of same.

In Fig. 3 is shown an edge view and designates position after folding.

Fig. 4 shows a side elevation after folding.

Fig. 5 shows a perspective view after folding.

Fig. 6 shows a perspective view of the overfolding wicket portion.

Fig. 7 shows a front elevation of two side portions assembled with the wicket to form a finished vated edge or rim 3 and the center flatsection 4.

In Fig. 6 is the over-folding wicket 5 having front the two portions of the key as shown in'Figs. 7,

8 and 9 and holds them securely together, the protrusion 2 passing through apertures l and 8 and securing the assembly as indicated at 9.

It is now obvious that I may form the portion 1 out of stampings. (The corresponding parts of the corresponding duplicate, side to side body portions are indicated in the drawing by the same numerals but with the indication prime, this I corresponds to I, and so on.) The elements I and l' are bent to provide the form shown in Fig. 5 and thus the key is formed by bending in opposite directions than that of any prior art fastener key. When placed side to side the wicket 5 is placed over the two body portions, as shown in Fig. 7, and the lugs 2-2 are staked so as to make an integral firm assembly having two smooth angular channels to receive the elements or scoops of a slide fastener and operate the same in the. best possible manner with catching or jamming eliminated due to absence of burrs and rough edges of a conventional die case or coined fastener key.

Having thus described my invention, what I claim and desire to secure by United States Letters Patent is:

1. The process of manufacture of a closure key for slide fasteners which consists of die stamping identical sides of the key, forming said side portions and placing two of said portions side to side and integrating the same with a wicket portion staked to each side of each of said slide portions.

2. The process of manufacture of a closure key for slide fasteners consisting of die stamping out of sheets identical side portiors of the key, forming said side portions in predetermined form, placing two of said portions side to side and integrating same with a wicket portion welded to said side portions.

3. A key for slide fasteners comprising a closure wicket and two identical stamped slide portions side to side, said wicket slotted to receive protrusions provided therefor on said slide portions and staked thereto. a

4. A key for slide fasteners comprising a closure wicket and two identical stamped slide portions sid to side, said wicket welded to said slide portions thus providing an integrated whole.

ROSCOE J. SMITH.

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