US2589491A - Staple setting apparatus and method - Google Patents

Description

March 18, 1952 2,589,491

C. B- GOODSTEIN STAPLE SETTING APPARATUS AND METHOD Filed July 51, 1946 INVENTOR Czar/g .15 C'izrodszfeizz Patented Mar. 18, 1952 STAPLE SETTING APPARATUS METHOD Charles B. Goodstein, New Rochelle, N. Y. Application July a1, 1946, Serial No. 687,415

2 Claims.

This invention relates to staples or staple strip,

methods of making the same, and machines for driving the same.

The smallest crown staples produced heretofore of the preferred nature have a crown of about one-eighth inch. Smaller crowns are impractical inthat the formin dies now used would not stand up' since they would not have sufficient body. There are some stitchers made which take wire from a coil and form a crown of .090{ Such stitchers are of course limited to light wire only and require much servicing since the former wears rapidly. In accordance with the present invention, the staple or staple strip has no conventional bridge or crown section, and is substantially crownless or bridgeless, having only a connection between the legs no greater than the radius of the wire folded almost back upon itself. Such staples can have legs of equal length, or one long leg and one short leg. Furthermore, the legs can be parallel or somewhat divergent. Where the staples have divergent legs, the stapling machine in accordance with the pres ent invention is provided with means to complete the straightening of the legs as it is driven, so that the staple is driven with its legs parallel.

Another object of this invention is to provide a staple comprising a pair of legs interconnected by a bent back portion no larger than the wire will permit when bending the wire upon itself to form the staple. Such staple may advantageously be used by upholsterers since they require an invisible tack or staple for finishing work on cloth. On cloth with a pile, the staple, because of its unusually narrow bridge would engage substantially only one thread when going into the wood for tacking and becomes practically invisible. For tackin woods together, a staple embodying the invention could be used in place of brads. Because of the elimination of a bridge or crown, the staple legs have a tendency to spread outwardly against the channel wall in the stapling machine; thereby receiving greater rigidity in the driving action. Thus, a flat driver engaging on top of the radius of the staple forces the legs to hug the channel walls during the driving operation.

Still another object of this invention is to provide a highly improved and economical method of making staples of the character described.

Still a further object of this invention is to provide a highly improved and efiicient machine for driving staples of the character described.

Yet a further object of this invention is to provide a strong, rugged and durable staple of the wire upon itself.

The invention accordingly consists in the features of construction, combinations of elements, and arrangements of parts which will be exemplified in the construction hereinafter described, and of which the scope of application will be indicated in the following claims.

In the accompanying drawing, in which is shown various possible illustrative embodiments of this invention,

Fig. 1 is a perspective view of a staplestrip embodying the invention;

Fig. 2 is a perspective view of a staple strip embodying the invention and illustrating a modified construction;

Fig. 3 is a view similar to Fig. 2 and illustrating yet another modification; I

Fig. 4 is an elevational view illustrating a step in making a staple embodying the invention;

Fig. 5 is an elevational, cross-sectional view of a stapling machine for driving staples embodying the invention;

Fig. 6 is an elevational cross-sectional view illustrating a pile cloth attached to a piece of wood for staples embodying the invention; and

Fig. 7 is a view similar to Fig. 5 and illustrating yet another machine for driving staples embodying the invention.

Referring now in detail to the drawing, [0 designates a staple strip embodying the inven tion comprising a plurality of staples I l, adhered together to form said staple strip.

Each staple ll comprises a pair of legs l2, which may be of similar length and parallel, interconnected by a top bent back interconnecting portion l3. The interconnecting portion I3 is preferably no larger than the wire will permit by bending the legs l2 together. The staple II is made from metal wire. If a piece of wire of which the staple is made is bent backon itself and released, it will open up a little and form an interconnecting portion [3. The width of the space between the legs I2 would then 'substantially be equal to the thickness or diameter of the wire. It could be less or perhaps as much as twice the thickness or diameter of the wire. It will thus be noted that the staple ll does not have a conventional bridge or crown. The interconnecting portion [3 is round or semi-circular and is formed merely by the act of bending The legs l2 are thus only slightly spaced apart.

The smallest crown staples heretofore produced I are the preformed type and have a crown of the character described, which shall be easy to obvious and in part hereinafter pointed out.

about one-eighth inch in length. Such staples staple ll may be made by first bending the wire into a V-staple as illustrated at [5 in Fig. 4. Such a staple is bent on a V-shaped die 16 so that it has downwardly and outwardly divergent legs l5a, with a top interconnecting portion l3.

Thedie I6 will thus have sufficient body because it is wider at its base.

Staple H may also be formed by bending a piece of wire over on itself and releasing the same so as to form an interconnecting portion having a natural radius caused by such bending.

If desired, the staple I5 may be used as it is, and driven by means of machine 38 as illustrated in Fig. 5. The machine 39 comprises a body 31 formed with a chamber 32 having downwardly andoutwardly diverging walls 34. Above chamber'32 is a passage '35 for a plunger or driver 36. 'At the lower end of chamber 32 are surfaces 31 which extend from the surfaces 34 and are inclined inwardly to each other, said surfaces runninginto the parallel surfaces 38 which form the passage 39 through which the staple is driven. The staple i5 is fed to the chamber 32 in the usual manner. As it is driven, the lower ends of the legs are guided inwardly toward each other by surfaces 36, so that as the staple passes throughpassage 39, the legs of the staple are in parallel condition.

In Fig. 6 is illustrated the use of staples l l for attaching cloth to wood or other material. The legs of the staple are close together, but nevertheless may engage a thread 49 of pile cloth 4| for attaching the same to a piece of wood or a base 42.. The cloth 4| may be upholstery fabric or carpeting, or the like pile fabric, and the staple becomes invisible when driven, as illustrated. The unusually narrow bridge may engage even a single thread-going into the wood to tack the cloth to the wood and the staple becomes practically invisible.

Layers of wood may be tacked together by staples l I. The staple can be used in place of brads. The legs of the staple being close together, increases the strength of rigidity of the staple. Because of the substantial elimination of the bridge or crown, the staple legs have a tendency to separate outwardly against the channel walls of a staple machine, thereby receiving greater rigidity in the driving action. Such action is illustrated in Fig. 7 wherein a stapling machine 50 has a driving passage 5|. The staple I I in I the passage is driven by a plunger or driver 52.

7 they aredriven into wood or like material.

In Fig. 2 there is shown a staple strip 10a em- ;bodying the invention and illustrating a modified construction. The staple strip 19a comprising staples Ila aglutenized or otherwise adhered together to form the strip. Each strip comprises a 1 longer leg 60 and a short leg BI and an interconnecting portion 62 therebetween. The interconnecting portion 62 is similar to the interconnecting portion 13 and is no greater than the radius of the wire folded almost back on itself.

\ The longer leg 60 is for driving the staple, and

the short leg 6! is for engaging material such as cloth.

In Fig. 3 there is shown a staple strip 101) which is comprised of staples 15. Such staples as illustrated in Fig. 3 may be'used as is, in a machine I shown in Fig. 5, or the legs'of such staples may be pressed together to form staple l I.

It will be noted furthermore, that when staple II is driven, if the legs contact one another due to their close proximity, one leg supports the other, to produce extra rigidity.

It will 'thus be seen that there is provided a device in which the several objects of this invention are achieved, and which is well adapted to meet the conditions of practical use.

As various possible embodiments might be made of the above invention, and as various changes might be made in the embodiments above set forth, it is to be understood that all matter herein set forth or shown in the accompanying drawing is to be interpreted as illustrative and not in a limiting sense.

Having thus described my invention,.I claim as new and desire to secure by Letters Patent: 1. Apparatus of the character described com;- prising a body formed with av chamber having divergent surfaces for supporting the legs of a V-shape'd staple received in said chamber, a passage above the chamber, a driver Within said passage, a second passage below said chamber having parallel surfaces throughout its extent, said chamber having inwardly converging surfaces extending from said'divergent surfaces toward the second passage whereby divergent legs ,of said staple in said chamber driven by said driver will be guided toward each other so as to cause said staple to be driven with paralleljlegs through said second passage.

2. A method of making a staple comprising the steps of bending a wire intermediate its ends into a V-shaped structure, placing said'structure in a V-shaped chamber having the convergent portion of said chamber communicating with a passage at the apex of said chamber, and having convergent surfaces extending from the divergent'portion of said chamber communicating with a second passage at the base of said chamber, said passages being formed by parallel walls and aligned with'each other, and pushing said structure by a plunger in said first passage through the second passage whereby the divergent legs of said structure will be guided together so as to cause said structure to be driven with parallel legs through said second passage.

CHARLES B. GOODSTEIN.

REFERENCES CITED UNITED STATES PATENTS Date Number Name 145,658 Keniston Dec. 16, 1873 150,420 Keniston May 5, 1874 251,977 Adt Aug. 1, 1882 263,391 Coop et al Aug. 29, 1882 301,839 Stover 'July 8, 1884 365,121 Doolittle June 21, 1887 403,923 Decker May 28, 1889 515,028 Temler Feb. 20, 1894 552,869 Elliott Jan. 7, 1896 572,293 Greenfield Dec. 1, 1896 965,588 Lay July 26, 1910 1,377,295 Wentworth May 10, 1921 1,792,235 Maynard Feb. 10, 1931 2,081,062 Nelson May 18, 1937 2,314,481 Crooks Mar. 23, 1943 2,396,276 Lang Mar. 12, 1946 FOREIGN PATENTS Number Country Date 279,747 Great Britain Nov. 3, 1927 t a J "A.

JAM

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