US2132693A - Method of making paper fasteners - Google Patents

Description

Oct. 11, 1938. I E. G. MARTIN ET AL 2,132,693

METHOD OF MAKING PAPER FASTENERS Filgd June 22, 1957 INVENTORfi E. G. MARTI N BY E. a. TAR

ATTORNEY.

fl Patented Oct. 11, 1938 PATENT OFFIQ'E METHOD OF MAKING PAPER FASTENERS Edward G.

Martin, Portland, reg., and Eugene E. Stark, Olympia, Wash.

Application June 22, 1937, Serial No. 149,674

1 Claim.

This invention relates generally to the stationers art and particularly to paper fasteners.

The main object having been mentioned is a provision of an exceedingly simple and eflicient form of paper fastener.

The second object is to construct a paper fastener by means of which a number of papers may be fastened together into book form andother papers may be added to the front or back thereof without removing the papers originally joined.

The further object is to construct a fastener of the type described which will lend itself to machine application. I

These and other objects will become more apparent from the specification following as illustrated in the accompanying drawing in which:

Fig. 1 is a perspective view of a single fastener.

Fig. 2 is a plan showing a number of the fasteners joined.

Fig. 3 is a fragmentary section through a number of papers showing the fastener being inserted therein.

Fig. 4 is a view similar to Fig. 3 showing one end of the fastener bent over to form a head.

Fig. 5 is similar to Fig. 4 but it shows both ends bent to form heads.

Fig. 6 is a perspective view of the fastener showing one end thereof bent up for the ordinary T shaped fastener for manual insertion.

Fig, '7 is a fragmentary view showing a modified form of point.

Similar numerals refer to similar parts in the several views.

Before entering into the description of this invention, it must be understood that it is an improvement over the strip type of fasteners in which a separatehead is provided, or in which the entire fastener is constructed from onepiece, in that as our construction enables the user to apply the papers to either end of the fastener instead of to one end only, as was heretofore necessary. Referring in detail to the drawing, there is shown a pair of prongs l0 having points II at each end thereof. The points H are offset as indicated as a common provision to facilitate a separation thereof.

The prongs I0 are united at an intermediate point l2 by means of spot welding or in any other convenient manner.

In the illustration, we have somewhat exaggerated the separation between the prongs H] which normally lie in close contact with each other.

In the drawing, the portion I 2 isshown as being offset which would be the case if the material was spot welded although naturally, this 5 would be a lesser degree.

In the form of the device in Fig. 2, the parts of fasteners II] are united into the form of a strip by any of the well known means for temporarily uniting fasteners. The purpose of so uniting them is of course, to facilitate their use in an applicator or fastener applying machine.

It will be noted in Fig. 3 that the prongs l0 have been inserted into the opening I3 in the papers 14. 15

In Fig. 4 the ends l5 have been bent over to form a head on one side of the papers l4 and'in Fig. 5 the ends l6 have been bent over to form a head which would be opposite the one formed by the ends l5. 20

It can be seen from the drawing, that additional papers l4 can be added to or removed from either side of the file without removing any of the papers from the prongs Hi,

In the production of this fastener, it is desirable to assemble two sheets of metal in the manner shown in Fig. 2 and to unite them along an intermediate line by means of a continuous spot weld IZA afterward shearing into separate fasteners leaving the ends of the welded portion smooth as a result thereof. In some cases it may be found desirable to form the points I I after the welding is performed. In such cases only the projecting end of each fastener is pointed, the other remaining blunt as shown in Fig. 7.

Obviously, the shape of the poins II as well as the means for uniting the prongs I!) may be varied greatly without departing from the spirit of this invention.

We claim:

A method of making paper fasteners consisting of serrating the opposite edges of a pair of sheets of metal, then imposing one of said sheets upon the other in a manner that the serrations are in transverse alinement but offset from each other, then welding said sheets together along a line between and parallel with said points and then severing said joined sheets between the serrations.

EDWARD G. MARTIN. EUGENE E. STARK.

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