Ribbon feed mechanism

Details Ribbon feed mechanism Ribbon feed mechanism

1984-09-28

1985-07-30

Burr, Edgar S.

Typewriting machines

Including interposed inking device for record-medium

Ribbon-feeding mechanism

4002362, B41J 3304, B41J 3322

Patent

active

045318492

ABSTRACT:
A ribbon feed mechanism for a printer comprises a carriage movably supported on a frame and movable with respect to a frame rack, the carriage supporting a ribbon cassette having a ribbon takeup shaft, a first drive gear held in mesh with the frame rack at all times, the first drive gear being movable with respect to the carriage, a second drive gear held in mesh with the frame rack at all times, the second drive gear being movable with respect to the carriage, an output gear spaced from the frame rack and coupled with the ribbon takeup shaft, and an idler gear held in mesh with the output gear at all times, the first drive gear being capable of mesh with the idler gear. The first drive gear is brought into mesh with the idler gear and the second drive gear is brought out of mesh with the output gear to rotate the output shaft in one direction when the carriage is moved in a first direction, and the second drive gear is brought into mesh with the output gear and the first drive gear is brought out of mesh with the idler gear to rotate the output shaft in said one direction when the carriage is moved in a second direction opposite to the first direction.

REFERENCES:
patent: 915037 (1909-03-01), Nickerson
patent: 3990564 (1976-11-01), Crump et al.
patent: 4468139 (1984-08-01), Hattori

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