Self adjusting, low torque ribbon drive system

Details Self adjusting, low torque ribbon drive system Self adjusting, low torque ribbon drive system

1993-02-09

1994-10-11

Burr, Edgar S.

Typewriting machines

Including interposed inking device for record-medium

Ribbon-feeding mechanism

400228, 400235, B41J 3324

Patent

active

053541383

ABSTRACT:
An improved ribbon cartridge has an endless printing ribbon and a ribbon inlet and outlet through which a portion of the printing ribbon is fed outside the cartridge for use by a printing device in a printing operation. The ribbon cartridge includes a self adjusting, low torque ribbon drive system, and more particularly, a gear system having a drive gear and one or more idler gears arranged in intermeshing engagement. Each of the gears has a compound curvilinear tooth configuration including one or more ribbon engagement ribs. At least one of the gears may be slideably mounted in the ribbon cartridge for positioning relative to an adjacent intermeshing gear in response to tension on the ribbon.

REFERENCES:
patent: 4213716 (1980-07-01), Carson et al.
patent: 4351619 (1982-09-01), Duke et al.
patent: 4523868 (1985-06-01), Shadwick
patent: 4552473 (1985-11-01), Pawlak
patent: 4747711 (1986-05-01), Motta et al.
patent: 5114254 (1992-05-01), Sato et al.

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