US2498901A - Paper fastener - Google Patents

Description

PAPER FASTENER Filed Sept. 18, 1944 A 5 Sheets-Sheet 1 Feb. 28, 1950 ,SEGAL 2,498,901

PAPER FASTENER Filed se pls, 1944 SSheets-Sheet 2 Feb. 28,1950 s. SEGAL 2,498,901

PAPER FASTENER Filed Sept. 18, 1944 5 sheets-sheet s Feb. 28, 19 50 sEA| 2,498,901 I PAPER FASTENER Filed Sept. 18, 4 5 Sheets-Sheet 4 ifiwnto ja/nwel 52 gal S. SEGAL PAPER FASTENER Feb. 28, 1950 Filed sep 1944 5 Sheets-Sheet 5 Patented Feb. 28, 1950 UNITED STATES PATENT OFFICE 1 rArER FASTENER Samuel Segal, New York, N. Y., assignor to Wilson-Jones Company, Chicago, 111., a corporation-of Massachusetts,

i pplication september 18, 1944, Serial No. 554,568

This invention relates. to ordinarily used to secure a plurality of sheets of paper or similar material together temporarily. It is an object of'this invention to provide improved means for facilitating the securement of a compressor plate to the prongs of a base member. It is a further object of this invention to provide a compressor plate with meansfor speeding up filing operations by decreasingthe' timere quired for manipulating the fastener. Other objects of this invention will become apparent upon reading the following description, taken in conjunction with the accompanying drawings, in which:

Figure l is a perspective view of one embodiment of my improved fastener secured to a stack of sheets; 1

- '5 Clair ns. ((124-153) a fastener of th type Figure 2 is a longitudinal sectional "view taken along the lines II--II of Figure 1;

Figure 3 is a cross sectional view taken along the line IIIIII of Figure 2;

Figure 4 is a perspective view showing the prongs of the basemember projecting through a stack of sheets and'the compressor plate in position to engag the prongs;

Figure 5 is a detail perspective view of one of the sliding keepers;

, Figure 6 is a detail perspective view of the compressor plate; I

Figure 7 is a view, similar to Figure 1, showing another embodiment of my improved fastener;

Figure 8 is a longitudinal sectional view take along the line yin-VIII of Figure 7;

Figure 9 isqa cross sectional view taken along the line IX-IX of Figure '7; V

Figure 10 is a view, similar to Figure 1, showing another embodiment of my improved fastener; I v

. Figure 11 is a view, similar to Figure .1, showing another embodiment of my improved fastener;

Figure 12 is across sectional viewtaken along the line XII- -XII of Figure 11;

Figure 13 is a view, similar to Figure 1, showing another embodiment of my improved fastener; v

Figure 14 is a cross sectional view taken along the line XIVXIV of Figure 13; and

Figure 15 is a detail perspective view of another embodiment of my compressor plate.

Referring to Figures 1 to 6 of the drawings, the reference numeral 2 indicates va base member having a pair of prongs 3 extending fromopposite .ends. 1 The prongs may beintegral with the base imembergas illustrated, or they. may beisecured to the base member in any suitable fashion. A

,. 4,.i n securelybound relationship.

2 plurality of sheets 4 of paper or similar material, provided with a pair of apertures 5, is impaled on the prongs 3. A compressor plate 6, adapted to engage the prongs 3, is positioned on top of the sheets 4 between the prongs 3.

The compressor plate 6 comprises a channellike member 1 having upstanding walls 8 and side flanges 9. The channel member 1 rests on the stack of sheets 4 andthe flanges 9 are spaced from the surface of th sheets sufiiciently to permit free sliding movement of a pair of keepers l0. An embossment l l is provided adjacent each end of the channel I for a purpose hereinafter described.

The sliding keeper l0 comprises a channel member I! adapted to fit inside the channel 1 and is provided with a pair of side flanges [3 adapted to fit over the flanges 6. The flanges l3 are bent downwardly and inwardly, as indicated at [4, to embrace the flange 6. The relationship between the keeper l2 and the channel member 1 is such that the keeper may slide longitudinally of the compressor plate with a relatively small amount of friction. One flange I3 is provided with a finger 15 extending transversely across the channel l2. The finger [5 may be bowed slightly, as indicated at IE, to provide rigidity.

The channel member I2 is provided with a notch IT in its end that is closest to the finger l5. When the sliding keepers ID are assembled on the compressor plate, as indicated in Figure 4, the embossment II engages the notch I! to prevent the keepers from being moved longitudinally off the compressor plate. When the keepers are in their outermost positions, as indicated in Figure 4, the fingers l5 are just beyond the outer extremities of the compressor plate so that they may act as guides in positioning the compressor plate relative to the sheet retaining prongs 3.

From the position indicated in Figure 4, the compressor plate is moved forwardly so that the prongs are engaged between the fingers l5 and the outer edge of the channel members I! and I. The prongs are then bent inwardly o'ver the channel members l2 and l and the sliding keepers are moved inwardly toward the center of the'compressor plate. If desired, the compressor plate may be furnished with an embossem from moving beyond the medial position. As illustrated in Figure 1, the fingers l5 project over the prongs 3 to retain them in thechannel 1 so as to securely maintain the plurality of sheets When it is desired to add or remove any sheets from the stack of sheets 4 it is necessary only to move the sliding keepers lo outwardly, to bend the prongs 3 upright, and remove the compressor plate by a simple transverse movement. With a conventional paper fastener, if the prongs are overlapped, or if they are close together at their ends, it is necessary to slide. one keeper in one direction to free its prong and then to slide it back in the opposite direction before the other keeper may be slid to free its prong. The same time consuming steps are necessary in order to secure the compressor plate conventional fastener.

The embodiment illustrated in'Figures 7, a

to the pron-gs in a and 9 is substantially similar to the embodiment previously described, the only differences being that the prongs 3' are each provided with an aperture l9 disposed near the free end, and the finger I5 is provided with an embossment 20. The embcssmentmakes the. finger l5 sufiiciently rigid so that it is not necessary to how the finger as in the previously described embodiment. When the keeper it is slid over the compressor plate with the finger i5 overlying the" prong 3 the embossment will engage the aperture is to maintain the keeper and prong in interlocking engagement against accidental displacement. It is obvious that a slight positive pressure will. be sufiicient to force the sliding keeper from this position.

The'embodiment illustrated in Figure 10 is similar to that shown in Figures 7, 8 and 9 except that the sheet retaining prongs 3" are provided with longitudinal slots 2i instead of the apertures l9.

The embodiment illustrated in Figures 11 and 12 is substantially similar to that shown in Fig.- ure 10 except that the sliding keeper Ill is folded to provide" an upstanding projection 22.

In this embodiment the finger does not require any embcssment because the projection 22 fits. into the slot 2! to serve the same purpose. The projection 22: may be sufficiently high to form a positive stop against the end of the slot 15 so that it may be impossible to slide the keeper l0" past the free end of the sheet retaining prongs 32' 5 In the embodiment illustrated in Figures 13 and 1A5 the base member is the same as illustrated in- Figures 1 to 6. The compressor plate 2-3 comprises a channel member 24 having longitudinal flanges 25 and 25. A pair of sliding keepers 21 is mounted on the flanges 25' and 26 The flanges 25 andv 22 are upset adjacent the outer ends or the compressor plate, as indicated at- 28 and 2.8 to restrict the sliding movement of the keepers 2?.

of." the prongs until the extensions 36 engage the edges of the prongs- The prongs are then bent downwardly and the sliding keepers are moved over them to. securely retain the papers in the stack 4 bound relationship.

The. embodiment illustrated in Figure 15 is substantially similar to that described in Figures 13' and re except that the extensions 39 are formed on thesliding keepers. 2-1" instead or on the flanges of thecompressor plate. thi

embodiment a stop member 3| is provided at each end of the flange 26'. In assembling this compressor plate with the base member the slidin-g keepers 21' should be moved to their outermost position so that the extensions 30' will serve as guide members to line the compressor plate up with the sheet retaining prongs.

Although I. have described. several embodiments of my invention in detail, it will be understood that the description thereof is illustrative,

rather than restrictive, as many details may be modified or changed without departing from the spirit or scope of my invention. Accordingly, I do not desire to be restricted to the exact details of construction described, except as limited by the appended claims.

Iclaim;

1. In a fastener, a base member having a prong projecting therefrom, a compressor plate, said prong being positioned over said compressor plate, and. a keeper having a portion slidable between said compressor plate and said prong, said keeper having a finger projecting over said prong.

2. In a iastener, a base member having a pair of sheet retaining prongs projecting thereiorm, said sheet retaining prongs each having a longitudinally extending recess stopping short of. its free end, a compressor plate positioned under said sheet retaining prongs, and a pair of sliding keepers. each having a portion projecting into the recess of one of said sheet retaining prongs to limit the sliding movement of said keepers towards the free ends of said sheet retaining prongs.

3. In a fastener, acompressor plate, a base member having a. sheet retaining prong bent over said compressor plate, a keeper slidable on said compressor plate with a partof said keeper under and another part over said sheet retaining prong, and cooperating means on said keeper and said sheet retaining prong limiting the sliding movement of said keeper in one direction.

4. In a fastener, a. compressor plate, a base member having a sheet retaining prong bent over said compressor plate, and a keeper slidable on said compressor plate with a part over and a part under said sheet retaining. prong, said keeper and said sheet retaining prong having interengaging parts for maintaining said keeper in engagement with said sheet retaining prong.

5. In a fastener, a compressor plate having a longitudinally extending. channel provided with a horizontal flange on each lateral edge, a keeper slidable over sai'dfianges, a finger integral. with said keeper, said finger extending transversely of said. channel, an upstanding embossment in said channel, and. a notch in said keeper engaging said embossment to limit the outward movement of said keeper relative to. said compressor plate, said finger being spaced. entirely beyond the end of saidcompressor. plate when said keeper is in its outermost position.

SAMUEL 'SEGAL.

REFERENCES CITED The following references are of record in the file of this. patent:

UNITED PATENTS Number Name Date 849,174, Dow Apr. 9, 1907 j 1,094,951 Washburne Apr..28, 191.4 1',650,.002 Al'ver' Nov. 22, 1927 1,936,144 Wagner Nov; 21, 1933 597,635 Forth Apr; 16,1935 2,119,842 June 7, 1933

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