US2553818A - Carbon holder for writing machines - Google Patents

Description

May 22, 1951 I -L. K. FLEISCHMANN CARBON HOLDER FOR WRITING MACHINES Filed Aug. 20, 1948 m 5 6 Z r. w m k Patented May 22, 1951 UNITED STATES OFFICE Lester K. Fleischmann, Chicago, Ill., assignor to Standard Manifold Company, Inc., a, corporation of Illinois Application August 20, 1948, Serial N 0. 45,377

1 Claim.

This invention relates to a carbon or transfer holding attachment for the carriage of writing machines such as typewriters, billing machines, and the like, and more particularly to an improved means for gripping a folded strip of transfer material to a slotted holding blade.

In adapting writing machines to the use of continuous form stationery it has long been the practice of providing la, carbon blade in interleaved relation with the stationery to which a forwardly extending strip of transfer material may be fastened. With simple blades a U-shaped clip is sometimes pivoted to the blade so that it may be swung into gripping position with the carbon folded over the blade. I have developed an improved slotted blade to hold the carbon and one form is shown in my Patent 2,542,496 issued February 20, 1951. In this form a carbon is threaded through a slot and folded about the front of the blade. However, it has been somewhat difficult to hold the folded carbon strip in proper position and prevent lateral shifting. The ordinary pivoted clamp cannot be mounted in the slot because it cannot be swung rearwardly a sufficient distance to provide an opening to receive the carbon strip. Adhesive tape can be used but this has some disadvantages and requires extna material. Y

The primary object of the invention is to provide simple clips which are pivoted to the blade and may be swung readily into gripping position. The invention is illustrated in a preferred embodiment in the accompanying drawings, in which- Figure 1 is a perspective view of a carbon holding blade embodying the invention; Fig. 2 is a plan view showing a portion of carbon paper in secured position; and Fig. 3 is a sectional view taken as indicated at line 33 of Fig. 2.

In the embodiment illustrated, a thin metal blade '4 is provided with a mounting slot 5 for attachment to the carriage of a writing machine. The blade has a forwardly extending portion 6 provided with a transverse slot 1 through which a strip of transfer material 8 may be threaded and folded over the portion 6 as shown in Figs. 2 and 3.

A pair of spring clips 9 are formed of a single strip of thin metal which is reversely folded as indicated at In to form a pair of opposed jaws adapted to grip the carbon strip against the crossbar 6. The rear free end portions are attached to and pivotally secured to the blade 4 b means of rivets l I.

To change the carbon strip the clips may be turned to the position indicated by the dotted lines in Figure 2 and the carbon strip folded about the blade 6. The clips may then be swung into position to bridge the slot and will grip the carbon strip securely until they are turned back into inoperative position.

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:

A device for securing a transfer sheet in interleaved relation with stationery in a writing machine, comprising: a thin blade adapted to be secured to a writing machine, said blade having a wide transverse slot through which a transfer sheet may be threaded and folded forwardly over the front of the blade; and a pair of short clips in said slot pivotally secured to said blade in rear of said slot and having a pair of opposed jaws which may be turned into a forward position in which they bridge the slot and grip the folded sheet against the front portion of the blade.

LESTER K. FLEISCI-IMANN.

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

UNITED STATES PATENTS Number Name Date 1,704,075 Brown Mar. 5, 1929 1,748,648 Helmond Feb. 25, 1930 2,089,442 Smith Aug. 10, 1937 2,091,089 Winter Aug. 24, 1937 2,153,210 Simonson Apr. 4, 1939 2,329,974 Bennett Sept. 21, 1943 FOREIGN PATENTS Number Country Date 6,313 Great Britain Mar. 14, 1912 86,018 \Switzerl'and Aug. 2, 1920

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