Device for modifying the tension of a ribbon wound on a take-up

Details Device for modifying the tension of a ribbon wound on a take-up Device for modifying the tension of a ribbon wound on a take-up

1995-04-12

1996-03-19

Burr, Edgar S.

Typewriting machines

Including interposed inking device for record-medium

Ribbon-feeding mechanism

400249, 2424136, 226195, B41J 3336

Patent

active

054998786

ABSTRACT:
A device for improving a system for controlling the winding of a ribbon on a take-up reel. This device is particularly designed to obviate the phenomenon of clinging between a ribbon and the face of a card to be printed on, during an operation of printing by the thermal transfer of inks carried by the ribbon. For that purpose, the vertical shift of the ribbon is detected by a sensor associated with an optical detection device. The detection of this shift prompts the modification, in a circuit, of the number of steps per time unit of the step motor.

REFERENCES:
patent: 3995551 (1976-12-01), Mitter
patent: 4605327 (1986-08-01), Ueki et al.
patent: 4775086 (1988-10-01), Kataoka
patent: 4788558 (1988-11-01), Caldwell et al.
patent: 5209587 (1993-05-01), Herbert et al.
Applegate, S. L., et al., "Electrothermal Ribbon Path", IBM Technical Disclosure Bulletin, vol. 23, No. 5, Oct. 1980, p. 2012.

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