Bidirectional ribbon drive control for printers

Details Bidirectional ribbon drive control for printers Bidirectional ribbon drive control for printers

1980-01-28

1981-10-13

Wright, Jr., Ernest T.

Typewriting machines

Including interposed inking device for record-medium

Ribbon-reversing mechanism

400225, 400234, 400902, 101336, 318 6, B41J 3340

Patent

active

042945526

ABSTRACT:
A printer having an ink ribbon with a bidirectional ribbon drive in which a pair of stepper motors have their windings cross-coupled so that a drag current flows through one stepper motor to apply drag torque to the ribbon when the other stepper motor is operated for driving.

REFERENCES:
patent: 3730082 (1973-05-01), Perry
patent: 3902585 (1975-09-01), Mogtader
patent: 3966036 (1976-06-01), Bernardis et al.
patent: 4000804 (1977-01-01), Zaltieri
patent: 4177731 (1979-12-01), Kleist et al.
IBM Technical Disclosure Bulletin, "Use of Stepper Motor as Variable Load", Barnett, vol. 19, No. 11, Apr. 1977, pp. 4120-4121.
IBM Technical Disclosure Bulletin, "Stepper Motor Drive Circuit", Barcomb, vol. 20, No. 8, Jan. 1978, p. 3046.

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