US2099881A - Binding device - Google Patents

Description

Nov. 23, 1937. -c. E. EMMER 2,099,881

' BINDING DEVICE Filed Oct. 16. 1955 Patented Nov. 23, 1937 PATENTOFFICE amnnve nnvrcn Charles E. Emmer, Chicago, 111., asslsnor to Cercla, Inc., Chicago, 111., a corporation of Illinois Application October 10, 1935, Serial No. 45,175 i 6 Claims.

This invention relates to improvements in binding devices.

One object of the invention is to provide a binding device for perforated loose leaves, pamphlets or the like which is formed preferably of sheet material, such as metal, and comprises arcuate binding arms which inter-engage at the free ends by telescopic action to provide rings enabling the bound sheets to be turned freely to 0 open or closed position.

Another object of the invention is to provide a binding device formed of a single sheet of material having arms the margins or marginal portions of which are folded over one face of the arms to provide a double thickness of material which not only stiffens the arms but provides means for effecting a relatively smooth interlocking engagement between the ends of the arms after the sheets have been assembled on the binding device.

Other objects relate to various features of construction and arrangement of parts which will be apparent from a consideration of the following specification and accompanying drawing, wherein certain embodiments of the invention are shown for the purpose of illustration. In the drawing:

Figure 1 is a broken'perspective view of a binding device shown in closed or binding position, sheets and covers being indicated by dash lines.

Figure 2 is a broken perspective view of the Figure '7 is a broken perspective view of a further modification of the invention.

modification.

In Figures 1 to 4 of the drawing, l0 indicates a central strip having integral laterally extending arms which preferably are stamped from a single sheet of metal. Arms. ll extend from one edge of the strip and arms I! from the opposite edge as illustrated in Figure 2. Between adjacent arms of one group such as arms ll, tabs l3 are provided.

The arms of both groups have the free ends Figure 8 is a broken perspective view of another reduced in width to form tongues or projections Ila, l2a which preferably are rounded at the extremities. The longitudinal margins of the arms II and I2 constitute flanges Ill) and l2b respectively, which are adapted to be folded over 5 a face of the respective arms to stiffen the same, to provide smooth edges and to provide recesses adjacent the bases of the tongues for receivin the tongues of the opposite arms. The flanges llb, III) are spaced slightly from the faces of 10 the outer or free ends of the arms but may be pressed into close contact with said arms at the opposite ends if desired. The spacing of the flanges from the arms as mentioned provides rece' ses for receiving the tongues or projections 15.

of the opposite arms.' Figure 4 illustrates certain of the flanges lib;

l2b folded over one face of the respective arms.

It will be noted in Figure 4 that flanges llb are folded over the lower faces of arms II and that 20 flanges I217 are folded over the upper face of arms l2. When the flanges of the arms have been folded as above mentioned the arms II and.

i2 are given the arcuate form shown in Figure 2 V which is less than a semi-circle. The strip Ill 25' is folded along its longitudinal center, indicated by line Illa in Figure 4, and the tabs l3 are folded over the opposite edge of the strip to retain the strip firmly in folded position. The binder is then in the form illustrated in Figure 2 and is so ready for receiving the sheets to be bound.

The sheets l4 indicated by dash lines in Figure l, are perforated at IE to receive the'arms II and I2 and may be placed on the arms with the strip ll! disposed midway between the covers I 6, 35 I! or,- if preferred, with the strip l0 disposed adjacent the back cover. The open ends of the arms then are pressed together, the tongues Ila entering the recesses l2c formed between the folded over flanges I21) and the adjacent faces 40 of the arms, and the tongues I20. entering thecorresponding recesses llc.

Due to the stiffening efiect produced by folding over the flanges Ila. and I24; and the double thickness of the strip lll, thin metal may be em- 4 ployed which results in a relatively smooth joint at the connected ends of the arms. The thick ness of the metal is considerably exaggerated in the drawing as will 2:: appreciated. The relative dimensions of the projections or tongues Ila, 50 We and the recesses llc, lZc may be such as to provide a tight frictional fit to retain the arms in closed position during use.

To further restrain withdrawal of the tongues Ila and Ho from the respective recesses of the 56 opposite arms, the tongues may, if desired, be provided with outwardly pressed portions I8 which during the closing operation snap past or into engagement with cooperating portions IQ of the opposite arms.

Due to the mutual telescopic arrangement wherein the tongues Ho. and i2a of the arms 25 have tongues 25b formed as extensions of the flanges 25a. The tongue 25b of each arm 25 is thus formed of two parts.

One advantage of this arrangement is that by folding the flanges of both arms over the. inner faces of the respective arms 24, 25, no seams or spaces are formed on the exposed or outer surfaces of the arms.

After the perforated sheets to be bound are inserted on the arms, the latter are pressed into mutual telescopic relation wherein tongues 24b enter recesses 25c and tongues 25b enter recesses 240. The relative dimensions of the cooperating arms and recesses can be such as to provide a fect this result the curvature of the ends Ha, Ha friction fit which retains the arms in engagement is such that as the arms are pressed toward closed position the paired tongues I la, l2a will move into contact and serve to guide each other into the respective recesses.

The modification of the invention shown in Figures and 6 corresponds to the form shown in Figures 1 to 4 inclusive, except, that the back strip 20 of Figures 5 and 6 extends inwardly of the binder instead of outwardly. The change is effected by folding the back strip 20 along its center line in a direction opposite the direction of fold of strip 10.

Tabs 2|, corresponding to tabs i3, are also provided for securing the edges of the strip 20 against separating movement. The remaining portions of the device of Figures 5 and 6 are similar in all respects to the form first described and are given similar identifying reference characters. In both described forms of the invention, the back strips l0 and 20 may be disposed within the bound edges of the sheets either centrally thereof or between the back cover and the last bound sheet. If desired, however, the strips may be disposed outwardly of they bound sheets.

In Figure 7 the strip 22 is not folded along its center line, as in the above modifications, but is flat or slightly curved in cross section, as illustrated. Tabs 23, integral with the strip and disposed between adjacent arms and I2 are folded.

over the inner face of the strip to stiffen it and provide smooth edges therefor. The strip 22 will be disposed along the bound edges of the sheets, and provides a. backing upon which indicia such as the title, volume, number, or like matter can be attached.

In this form of the invention half the perforated sheets may be placed on one group of arms,

'and the remaining sheets on the other group of arms prior to pressing the arms to closed position or all the sheets to be bound and the covers, if any, may be placed on one arm if desired, unless the number of sheets is too great, and the arms thereafter moved to closed position and the sheets distributed upon both arms. Since the construction of the arms of the binder shown in Figure '7 is the same as-the arms of Figures 1 to 4, similar reference characters are employed to designate corresponding parts, and it is believed no additional description of the same is required.

In Figure 8 the arms 24 and 25 are arcuate but due to the relative size and shape of the back strip 26 the binding is not circular in cross section. The arms 24 and 25 while preferably integral with the back strip as in the previously described forms of the invention, have their margins 24a, 25a respectively folded over the inner face of the arms in both instances. The arms 24 are provided with tongues 24b extending arcuately from the outer'face thereof While M1 15 or the arms may, if desired, be provided with portions 21, 28, the former of which snaps past the latter when the arms are pressed to closed position to restrain separation of the inter-engaged ends to provide a permanent binding.

While I have shown and described certain embodiments of my improvements for the purpose of illustration, I do not wish to be restricted specifically thereto except as so limited by the appended claims.

I claim:

1. A binder comprising a strip directed arcuate arms extending therefrom arranged in cooperating pairs adapted to be pressed into ring form, said arms being of sheet material and provided with projections on the free ends of certain of said arms and recesses in the mating arms each for telescopically receiving said projection of the other arm of the pair for connecting said ends together.

2. A binder comprising a strip and two groups of integral oppositely directed arcuate arms, the arms of one group having marginal portions foldedover one face of the arms to provide recesses adjacent the free ends of the arms, the arms of the opposite group having free ends arranged to pass into said recesses to provide closed binding rings, and means for retaining said rings in closed position.

3. A binding device comprising a strip provided with two groups of oppositely directed arcuate arms adapted to be pressed into ring form, each of said arms being paired with an arm of the other group and provided with longitudinal recesses adjacent the free ends thereof, said arms each having a free end arranged to pass into the recess of the other arm of the pair to provide mutually tescopic connections for the arms when pressed into ring form.

4. A binding device comprising a strip proand oppositely vided with oppositely directed arcuate arms adapted to be pressed into ring form,-said arms having projections at the free ends thereof and recesses at the rear of said projections, said arms being arranged in pairs whereby when each pair is pressed into ring form the projection of each arm is disposed within the recess of its mate to provide mutual telescopic connections for the arms.

5. A binding device comprising a strip provided jection of said arm, the arrangement being such that as said arms are pressed to ring form the projection of each arm serves as a guide to direct its mate into the cooperating receiving recess.

6. A binding device comprising a. strip having integral arcuate arms arranged in pairs extending from opposite edges thereof, and adapted to be pressed into ring form, saidarms having longitudinal marginal portions folded over a face thereof to provide tongue receiving recesses adjacent the free ends of the arms, and a tongue projecting beyond the forward end of each recess and arranged to enter the recess of an opposite arm when said pairs of arms are pressed into ring form to connect the free ends of each pair of arms.

CHARLES E. EMINIER.

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