US2116365A

US2116365A - Fastener

Info

Publication number: US2116365A
Application number: US96433A
Authority: US
Inventors: Schafer Friedrich
Original assignee: WALDES A SPOL
Current assignee: WALDES A SPOL
Priority date: 1935-10-01
Filing date: 1936-08-17
Publication date: 1938-05-03
Anticipated expiration: 1955-05-03

Description

May 3, 1938. VP CHA Q 2,116,365

FASTENEB Filed Aug. 17, 1936 I Fl Patented May 3, 1938 UNITED STATES FASTENER Friedrich Schafer, St. Gallen, Switzerland, as-

signor of one-half to Waldes A Spol (partners Jindrich Waldes, Zikmund Waldes, and Vojtech Puc), Prague, Czechoslovakia Application August 17, 1936, Serial No. 96,433

In Switzerland October 1, 1935 1 Claim.

This application has been filed in Switzerland on October 1, 1935.

The present invention relates to fasteners, made of springy wire in the form of a bendable clamp having two clamping limbs connected at one end, hereinafter referred to as the apex of the clamp, by a cross member. The invention particularly relates to fasteners of the above kind in which the two limbs cross each other. Such fasteners are mainly used for clamping or fastening paper sheets and thin textile articles.

The object of the invention is to provide a fastener of the above type which will very effecr tively clamp the article and can be easily inserted or applied without any risk of injury to the article.

An important feature of the invention is the fact that one of the limbs of the clamp is bent near the apex of the clamp so that the bent portion is not in the plane in which the limbs of the clamp cross each other whilst the other limb lies in the plane of the clamp. Owing to this construction the limbs of the clamp will upon application of the clamp to the article to be clamped, say a bundle of sheets of paper or textile layers, slide parallel to the, main plane of the article,

without any risk of the article becoming injured or creased, or moved apart. Moreover, the several sheets or layers of the article will be uniformly and permanently clamped so that any accidental sliding off of the clamp cannot take place.

It is preferred to make the bent limb of the clamp shorter than the straight limb and to arrange the point of crossing of the two limbs so that its distance from the apex of the clamp is greater than the distance of the two upper ends of the limbs.

Upon application of the clamp, the sheets or layers'of the article are very firmly gripped even if their edges or ends are not exactly in register. It is not necessary on applying the clamp to move the two limbs of the clamp apart. The clamp may, for instance be applied by placing first the upper connecting member of the limbs at an angle to the plane of the article so that upon sliding the clamp upon the article, the limbs of the clamp automatically move into planes parallel to the main plane of the article.

The improved construction therefore has also the important advantage of facilitating application or insertion of the clamp.

The accompanying drawing illustrates two constructions embodying the features of the invention.

The first construction is shown in Figs. 1 and 4,

Fig. 1 being a front View of the improved clamp,

Fig. 2 a side elevation,

Fig. 3 a top view and Fig. 4 a view similar to Fig. 1 showing the manner in which the improved clamp may be applied to a bundle of paper sheets or textile layers.

Referring to the drawing, a designates the short and b indicates the long limb of a clamp made of springy wire. The straight member connecting the tops of the limbs is designated by the letter 0. The limb a. has in the vicinity of the member 0 a bent portiond which projects from the main plane of the clamp. The limbs a and b are formed at their ends with rounded heads 1 and g respectively. Due to the provision of the bent portion d of the limb or the clamp will exert a very strong, uniform and permanent clamping action. Making the limbs of different lengths facilitates the application of the clamp to a bundle of sheets or textile layers indicated by chain dotted lines in Fig. 4, even if the top edges of the sheets or layers do not register. It will be seen that in that case the clamp is so applied that the shorter limb engages the longer and the longer limb the shorter sheets of the bundle. Making the point at which the limbs a and I) cross each other at a distance from the apex of the clamp greater than the length of the transverse connecting member c, facilitates applica over, on applying the clamp to the sheets of paper or material to be held together, the limbs press or force themselves into the sheets, the flattened portions 0/ and b tending to lie flat on the face of the sheets whilst the connecting strip 0 tends to take up a position parallel to the plane of the paper.

I claim:

A clamp made of springy wire, more particularly for fastening paper sheets and textile articles, comprising in combination: two limbs made of springy wire connected at the top by an apex member, one of the limbs having at the point of connection with the apex member a bent portion projecting from the main plane of the clamp and the other'limb extending straight in the said plane, whereby the clamp, on being applied to the paper, will automatically swing into the plane thereof, the two limbs crossing each other and being formed at the crossing position with flattened portions to allow of as little as possible spreading of the limbs, said portions being adapted on the application of the clamp to the sheets to press into said sheets.

FRIEDRICH semis-ER.