Ribbon drive with spring-loaded idler

Details Ribbon drive with spring-loaded idler Ribbon drive with spring-loaded idler

1978-10-03

1981-02-24

Wright, Jr., Ernest T.

Typewriting machines

Including interposed inking device for record-medium

Package for ribbon facilitating mounting of ribbon on...

4002351, 226187, B41J 3314

Patent

active

042524504

ABSTRACT:
A ribbon drive device comprising a rotatably supported drive roller, a rotatably supported idler roller and a device for biasing the idler roller against the drive roller to form a nip therebetween through which a ribbon is fed. The device for biasing the idler roller is positioned to apply a bias force to the idler roller at the longitudinal center thereof. The device for biasing comprises a straight piece of round or rectangular spring wire positioned in a groove formed in the periphery of the idler roller.

REFERENCES:
patent: 746765 (1903-12-01), Warner et al.
patent: 2597176 (1952-05-01), Pettus
patent: 3356202 (1967-12-01), Goff
patent: 3424360 (1969-01-01), Trott
patent: 3672655 (1972-06-01), Carter
patent: 3831731 (1974-08-01), Mack et al.
patent: 3904016 (1975-09-01), Hengelhaupt
patent: 3960259 (1976-06-01), Guerrini et al.
patent: 3973707 (1976-08-01), Pratt et al.
patent: 3974906 (1976-08-01), Lee et al.
patent: 3977512 (1976-08-01), Teagarden et al.
patent: 3993182 (1976-11-01), Steinke
patent: 4011933 (1977-03-01), Kern
patent: 4091913 (1978-05-01), Ku et al.
patent: 4091914 (1978-05-01), Stipanuk
patent: 4092921 (1978-06-01), McInnis et al.

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