US2492036A - Carbon holder and paper slitter - Google Patents

Description

Dec. 20, 1949 1.. K. FLEISCHMANN 2,492,035

CARBON HOLDER AND PAPER SLITTER Filed March 23, 1948 INVENTOR: Lester K. Fleischmann Afforneys Patented Dec. 20, 1949 CARBON HOLDER AND PAPER SLITTER Lester K. Fleischmann, Chicago, Ill., assignor to Standard Manifold Company, Inc., a corporation of Illinois Application March 23, 1948, Serial No. 16,407

Claims. ((31. 2823) This invention relates to an attachment for manifolding machines wherein strips of carbon are anchored between strips of continuous form stationery, and more particularly to an attachment for use in fanfold stationery, wherein it is desired to sever the connected edge of the sta tionery strips before they are advanced into writing position.

The primary object of the invention is to provide an improved slitter and spreader for fanfold stationery, wherein the slitter separates the connected edge and the spreader opens the strips a greater amount remote from the connected edge.

A further object of the invention is to provide a spreader with a rounded and tapered edge which will prevent the lines of weakening from catching and tearing on the carbon holding blade.

It will be understood that as many slitters will be provided as there are folded edges to be severed.

The invention is illustrated in the accompanying drawings in which- Figure 1 is a plan view of a device embodying the invention; Fig. 2, a Vertical sectional view, taken as indicated at line 2-2 of Fig. 1; Fig. 3, a plan view similar to Fig. 1, showing a modified construction; Fig. 4, a vertical sectional view, taken as indicated at line 4-4 of Fig. 3; Fig. 5, a vertical sectional view, taken as indicated at line 5-5 of Fig. 3; and Fig. 6, a sectional view, taken as indicated at line 6-6 of Fig. 3.

In the embodiment illustrated, a conventional channel-shaped blade supporting bar I is shown provided with the usual upwardly extending ears 8, on which conventional thin, slotted carbonholdlng blades 9 may be mounted in interleaved relation with forwardly advancing stationery strips, indicated by broken lines.

In the embodiment shown in Figs. 1 and 2, a sheet of plastic material, such as celluloid, is provided with an aperture l0 through which a piece of fabric II is wrapped around the front portion of the slitter member [2, and is glued to itself at 13 to provide a pocket with open ends to receive the carbon holding blade 9.

The member l2 may be held against longitudinal displacement on the blade 9 by means of a piece of adhesive tape l6.

One end of the member I2 forms a cutting portion I! which extends rearwardly to engage the connected edge of the advancing stationery strips. The member also is provided with a guide portion which is formed by folding the rear edge portion l8 forwardly to provide a rounded smooth rear edge I9. The fold is quite abrupt near the cutting edge I], and gradually increases in depth towards the other end 2|! so as to spread the advancing stationery strips a greater amount at the free end. Also, it is preferred to have the rear edge I9 biased rearwardly from the carbon blade 9, so that the end 20 extends rearwardly a greater distance than the other end of the fold. This prevents the transverse lines of weakening of the stationery strips from catching on the device, but does not interfere with the action of the cutting edge l1.

It is not essential that the cutting edge I! be sharp, as it has been found that an ordinary celluloid edge will operate satisfactorily for long periods. However, if preferred, the cutter portion may be made of metal, as indicated in Fig. 3. In this form, the guide member 2| has a slot 22, and a pocket which is formed by sewing a piece of fabric 23 around the front portion of the member 2| to receive the blade 9. It also has a tapered biased guide portion 24 which is similar to that described above. However, in this form, a metal insert 25, preferably of stainless steel, has a laterally extending le 26 which slips into the pocket of the device between the carbon holding blade 9 and the front portion of the guide member 2|. The blade also has a laterally and rearwardly extending wing 21 to fit into the fold of the guide portion 24. The insert may be held in position by means of a piece of adhesive tape 28.

In the form shown, the combined slitter and guide member is shown as an attachment for a carbon blade 9. However, it will be understood that it also could be made integrally with the carbon blade, in which case the pocket portion could be omitted.

In using the device, the carbon blade 9 is in serted through the pocket and placed on the ears 8, so that the cutting edge of the slitter engages the connected edge of the stationery strips. A sheet of carbon paper, or flap of a carbon holder may be secured through the slot l0, around the blade 9 in the conventional manner. If the stationery is of the three-ply type, a similar installation may be made with the cutting edge of the next device arranged to slit the opposite connected edge of the stationery.

The foregoing detailed description is given for clearness of understanding only, and no unnecessary limitations should be understood therefrom, for some modifications will be obvious to those skilled in the art.

I claim:

1. A carbon holder for a manifolding device comprising: a thin cross member to which carbon strips may be attached and adapted to be mounted between strips of advancing stationery, said member having a rearwardly extending cutting portion to sever a connected edge portion of the stationery strips, and. said member having a guide portion extending rearwardly and transversely from said cutting portion and tapering to an increasing depth from the cutting portion so as to spread the advancing strips a greater amount remote from said cutting portion.

2. A device as specified in claim 1, in which the guide portion is made of flexible plastic material and has its rear portion bent forwardly to provide a biased rounded rear edge portion and a forwardly extending flexible arm to spread the stationery strips.

3. A slitter and spreader, adapted to be secured to a carbon blade between continuous form stationery strips, comprising: a thin flexible rearwardly extending member having a cutting edge portion at one end and a guide P r 0:1 extending transversely and tapering indepth from said cutting edge to the other .end so as to spread advancing stationery strips a greater amount remote from said cutting edge.

4. A device as specified in claim 3, in which the guide portion of the member is made of thin plastic material having a rearwardly presented folded edge which is biased rearwardly and transversely with respect to the travel of the stationery strips, and the cutting edge portion is made of metal and has one end extending into said folded edge of the guide portion.

5. A device as specified in claim 3, in which the slitter and spreader is provided at its front por tion with an open ended pocket member to re- 0613/? .a -.C ..rbon blade and around which a carbon sheet holder may be folded.

LESTER K. FLEISCHMANN.

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

UNITED STATES PATENTS Number Name Date 531,551 Kinnard Dec. 25, 1894 1,929,483 Copeland Oct. 10, 1933 2,091,089 Winter Aug. 24, 1937 OTHER REFERENCES :Ser, No. 414,965, Lampertz (A. P. C.) pub. May 11, 1943.

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