Ribbon feed mechanism

Details Ribbon feed mechanism Ribbon feed mechanism

B - Operations, Transporting

41

J

197/110

B41J 33/14 (2006.01) B41J 33/28 (2006.01)

Patent

CA 1097581

RIBBON FEED MECHANISM ABSTRACT OF THE DISCLOSURE A ribbon feed mechanism for typewriters operable to incremen- tally feed a ribbon with a dual segment continuous motion ribbon feed. The ribbon is advanced an initial segment by a power actuated linkage and advanced a final segment by a spring urged arm acting on a multi-toothed cam. The initial segment feed occurs when a bellcrank is pivoted, and through a linkage, urges a ribbon metering shaft to rotate which, in turn, feeds the ribbon. Simultaneously, a spring biased cam follower is gradually displaced by the multi-toothed cam which is supported on the metering shaft. The final segment feed occurs as the spring biased cam follower is rapidly displaced down a cam surface of a tooth on the multi-toothed cam.

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