US2327941A - Closely wound coil binder - Google Patents

Description

Aug. 24, 1943. TAUBER 2,327,941

CLOSELY WOUND COIL BINDER Filed D96. 19, 1942 *ll/l/llll/l/lllll/IIIIIIIIll/Ills IN VEN TOR. RuooLF Dues/e A TZORNTY Z Patented Aug. 24-, 1943 oLosEiLY WOUND COIL BINDER Rudolf Tauber, New York, N. Y.

Application December 19, 1942, Serial No. 469,756

5 Claims.

This invention relates to improvements in binding devices for loose-leaf books, papers, and related articles, and more particularly to that type known as coil binders.

Such sheeets are first provided with a plurality of uniformly spaced perforations in their marginal portions, either at the top or along their inner edges, as may be preferred.

A wire, usually metal, is wound into a coil having its convolutions spaced in conformity with the spacing of the perforations in the papers to be bound, and its end entered in one of the end perforations; then by continuously rotating the coil, in the manner of a screw, the wire is threaded into the openings and its ends secured in some manner to be retained therein.

It is to be noted that such loose open wound coils, when made in any considerable quantities and brought into intimate contact with one another, invariably become entangled, causing delay, often becoming stretched, rendering it difficult to assemble, and, if of metal, are subject to corrosion, thereby defacing the papers.

Having these matters in mind, it has been an object of the present invention to provide a coil binder, made of synthetic resin, incapable of discoloration, in any preferred color, and of a size suited to the purpose.

A further feature is in the production of a closely wound, light weight binder coil, not readily subject to entanglement because of its compact, essentially impenetrable structure. It is also more conveniently packaged for transportation by reason of non-interference of one coil with another when brought into physical lateral contact.

Another purpose is to produce a coil binder having such inherent frictional, contractive effect between its adjacent coils, as to remain in place in the perforations in the paper, Without creeping or end movement, and provided with an offset, prong-like leader or guide terminal adapted to automatically enter successive perforations in the paper by merely rotating the coil.

These highly important objects are attained by the simple construction and arrangement of a single unitary coil, as hereinafter described and shown in the annexed drawing, appertaining to this disclosure, and in which:

and drawn to an enlarged scale.

Figure 1 is a perspective view of a conventional book illustrating the insertion of a closely wound coil binder.

Figure 2 is a fragmentary sectional view look- Figure 3 is a side elevational view showing in detail the binder as prepared for insertion.

As illustrated, the book X is provided with a definite number of equally spaced perforations 50 through all of the pages and cover, if one be used.

A tightly wound dense helical coil 6|, of non metallic wire-preferably a synthetic resin-of any color or transparent, is wound to contain a number of convolutions equaling the perforations in the book, and of a diameter compatible with the thickness of the book.

The advance or entering end 62 of the coil is offset from the next adjacent convolution an amount equal to the distance between adjacent perforations and is provided with a conical terminal tip 63. 1

It is found that when rotating the coil in the proper direction, the pointed tip 63 will pass readily through consecutive perforations progressively, causing the closed coils to auto-matically spread themselves and assume their proper spaced position as they become threaded into the openings.

It is further found that the spring tension of the coils causes a frictional effect in the walls of the perforations suificient to maintain them in position, although heading of the opposite end of the coil may be resorted to, as indicated at 64, if desired.

It is to be noted that closely wound coils are far more amenable to packaging and shipping, due to their compactness and freedom from entanglement, than open coils, and more economically produced.

The simplicity and practical advantage of this coil binder are obvious; however, minor changes may be made within the scope of the appended claims.

Having thus fully described the invention, what is claimed as new and. desired to secure by Letters Patent of the United States, is:

1. As a new article of manufacture, a book binder comprising a straight cylindrical densely wound coil of wire, one end of the coil being conically pointed and bent angularly outward from the next adjacent coil while retaining the curvature of the coil.

2. As a new article of manufacture, a book binder comprising a straight cylindrical compactly wound coil of wire, one end of the coil being conically pointed and bent angularly outward from the next adjacent coil while retaining the curvature of the coil, the opposite end cf the coil being expanded to a diameter in excess of the cross-section of the wire.

3. In a binder for loose papers having a plurality of equally spaced marginal perforations adjacent their inner edges, comprising a tightly Wound dense helix of non-metallic material, one end coil being turned angularly outward a distance equivalent to the space between the centers of adjacent perforations, and an outer conical terminal on said end coil. I 1

4. In a binder for books having a row of uniformly spaced perforations through their hingedly connected rear marginal portions, comprising a binder composed Wholly from a definite length of an occluded densely wound helical coil of non-metallic wire, the number of. coils in said length being co-equal with the number of perforations in the book, and a sharply pointed prong bent outwardly away from the next adjacent coil a distance equal to the spacing of contiguous perforations. V

5. In a binder for books having a straight row of perforations adjacent their backbones, comprising a measured length of tightly coiled nonmetallic wire, the number of coils equaling the number of perforations, an offset sharply pointed prong onv one end of the coiled wire, the point of said prong reaching-awayfrom the'next adjacent convolution a distance equal to that between contiguous perforations, and a head on the opposite end of said coil of greater size than that of said perforations.

RUDOLF TAUBER.

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