US2465861A - Carbon holder - Google Patents

Description

Y March 29, 1949. L ,.K. FLEISCHMANN l 2,465,861

CARBON HOLDER Filed Nov. 25, 1946 Patented Mar. 29, 1949 2,465,861 CARBON HOLDER Lester K. Fleischmann, Chicago, lll., assignor to Standard Manifold Company, Inc., a corporation of Illinois Application November 25, 1946, Serial No. 712,168 6 Claims.- (Cl. 197-126) This invention relates to manifolding devices, and more particularly to devices for holding a thin i'lat roll of transfer material between continuous-form stationery strips, so that a free end of the carbon strip will extend forwardly with the stationery into writing position on a typewriter, billing machine, or the like. One carbon holder will be provided for each carbon copy.

The primary object of the invention is to provide a very light, simple and inexpensive device for holding a dat roll of paper coated with carbon or other transfer material, between advancing strips of continuous-form stationery, so that after the front end portion of the carbon strip becomes worn it will be torn off and discarded, and an additional portion of fresh carbon paper may be unwound from the roll without removing the roll or holder from the machine.

In typewriters, billing machines, and the like, for holding continuous-form stationery, it is common practice to provide a travelling carriage in rear of the platen, provided with cross blades for gripping the rear end portions of carbon strips. After a set of forms has been lled in, those forms are advanced, and the carriage with its attached carbon is retracted into the succeeding set of forms. In the present invention, a ilat roll of carbon paper is hinged to a leader sheet which is folded over and thereby anchored to the carbon-holding blade of the machine.

Another object of the presentinvention is to provide a mounting for a flat carbon roll which is adapted for use in fanfold stationery, i. e., stationery wherein the superposed strips are engaged at one lateral edge, and fresh carbon may be unwound from the roll, when desired, without breaking the connection between the stationery strips.

Another object of the invention is to provide a carbon holder having a flattened holding bar to engage the core of a at carbon roll, and to resist accidental unwinding of fresh carbon. Preferably, the holder is mounted on a slight bias in fanfold stationery, so that the carbon paper will extend clear into the folded edge portion and enable a complete carbon copy to be made.

The invention is illustrated in a preferred embodiment in the accompanying drawings, in which- Figure 1 is a plan view showing how the leader is held on a carbon blade and supports a carbon roll; Fig. 2 is a side elevational view, taken as indicated at line 2-2 of Fig. l, and showing the device interleaved with continuous-form stationery; Fig. 3 is a plan sectional view, taken as indicated at line 3-3 of Fig. 2; Fig. 4 is a fragmentary enlarged sectional view, showing how the cross-bar is Secured to the trunnions of the bail, and Fig. 5, a sectional view, taken as indicated at line 5 5 of Fig. 4.

In the embodiment illustrated, a leader sheet, of cardboard or heavy fabric, is folded and forms a bottom flap t and a top flap l. The folded portion of the leader sheet is adapted to be* engaged by a thin flat metal blade 8 provided on a typewriting machine which is not shown.

A wire bail 9 has its rear portion hinged to the inner face of the bottom flap E by a hinge member I which preferably is biased slightly. The bail member has its front end portions turned inwardly, as indicated at Il, to form studs or trunnions for a cross-bar l2. Preferably, the arms of the bail are extended laterally, so that the loop formed with the cross-bar is wider at its front portion than its rear portion.

The cross-bar I2 is preferably tubular, with its end portions I3 adapted to make a friction fit with the trunnions II. Its central portion is flattened, as best shown in Fig. 5, so that its cross-sectional length, longitudinally of the leader sheet, is considerably greater than its thickness. Its edges are rounded, as indicated at I2a. The carbon roll I 4 comprises a number of turns of paper coated with transfer material, and preferably its central portion is uncarbonizedso as not to soil or adhere to the cross-bar I2. A suitable length I5 is unwound and led forwardly between strips of continuous-form stationery I6, to writing position, as shown in Fig. 2. Preferably, the naps E and I of the leader sheet are suiciently long to overlap the roll I4 and guard it from the stationery.

In order to install the carbon holder, the folded portion of the leader sheet is engaged by the carbon-holding blade 8 of the machine. If the stationery is of the fanfold type, it will be understood that the blades 8 extend inwardly from alternate sides towards the connected edges of the fanfold strip. The wire loop may be opened by pulling one of the trunnions II out of the socket portion I3 of the cross-bar l2 and, after the roll of carbon has been slipped over the cross-bar, the trunnion maybe swung back into the socket I 3. A suiiicient length of carbon is unwound to be coextensive with the stationery strips in writing position. After a set of forms has been filled in, the carbon assembly is retracted and the completed set of forms advanced and detached, if desired. Even though the carbon roll is quite flexible, the flattened cross-bar I2 has been found suicient to prevent the carbon from unwinding during the shifting operation. However, if desired, a paper clip may be used to secure the roll to the cross-bar I2, as an added precaution, or one end of the carbon roil may be fastened to the flap with a paper fastener,

After the carbon paper in writing position becomes worn, it may be detached and discarded and a fresh supply torn from the roll, by swinging the holder 9 upwardly and pulling out a fresh length from the roll. Due to the flexibility of the roll this may be done without opening the wire loop, or separating the fanfolded stationery at its connected edge portion. The shape of the wire loop will permit the end of the roll to be brought into close proximity to the connected edge of the fanfold stationery, and due to the fact that the cross-bar l2 is on a slight bias, perpendicular to the direction of travel of the stationery, the carbon strip in writing position will extend as close to the 'fold as is necessary to make a complete carbon copy. Although only one carbon holder has been shown, an additional carbon holder will be provided for each additional strip of continuous-form stationery.

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

I claim:

1. A holder for a flat roll of transfer -material, adapted for use between a pair of continuousform stationery strips, comprising: a folded leader sheet adapted to 'be anchor-ed between 'forwardly advancing stationery strips; and `a .resilient wire loop having 'its rear portion secured to an inner face of said 'leader sheet, 'and 'said wire loop having its front ends turned inwardly and Aforming trunnions to hold lthe core of a flat roll of transfer material.

2. A device as specied in claim l, in which the rear portion of the yloop Ais hinged to the inner face of the lower flap of the leader sheet so that the loop may be swung upwardly therefrom.

3. A device as specied in claim 1, in which the front portion of the loop is Wider than the rear portion, and the rear portion is hinged to the leader sheet so that the front portion will be slightly biased.

4. A device as specified in claim 1, in which the front portion of the loop includes a straight cross-member releasably engaged by the trunnions, said cross-member having rounded edges and being flattened so as to be longer in cross section than in thickness, longitudinally of the leader sheet.

5. A holder for a flat roll of transfer material, adapted for use between a pair of continuousform stationery strips, comprising: a folded leader sheet adapted to be anchored between forwardly advancing stationery strips; and a wire ball having a rear portion hinged to an inner face of said leader sheet and having a laterally extended front portion with its ends turned inwardly to form trunnions.; and a thin flattened cross-bar adapted to engage the core of a flat roll of transfer material, the ends of said crossbar being .hollow and having frictional engagement with said trunnions.

6. A device as specified in claim 5, in which the leader sheet is of Suflicient 'length 'to provide an upper and a lower flap which extend forwardly beyond part of a flat carbon roll mounted on the cross-bar.

LESTER K. FLEISCHMANN.

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

UNITED STATES PATENTS 40 Number Name Date 2,236,155 Petit Mar. 25, 1941 2,292,343 McAlvin Aug. 4, 1942

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