Printwheel detent disengaging apparatus

Details Printwheel detent disengaging apparatus Printwheel detent disengaging apparatus

1987-12-21

1989-09-12

Pieprz, William

Printing

Selective or progressive

Printing members

101 99, 74527, 403DIG6, B41J 1348

Patent

active

048649244

ABSTRACT:
A printwheel detent disengaging mechanism enables low-torque high-speed automatic printwheel setting. In the engaged position spring-loaded ball in a rotatable shaft bears on a detent ball disposed in a bore in a sleeve surrounding the shaft to cam the detent ball into detent vees of the printwheel. When the shaft is rotated so that the spring-laded ball no longer bears on the detent ball, the detent force is removed and low torque printwheel setting may be accomplished. When setting is completed, the shaft is rotated back into position where the spring-loaded ball bears on the detent ball.

REFERENCES:
patent: 2162359 (1939-06-01), Rhinevault
patent: 3045498 (1962-07-01), Viezzoli
patent: 3768333 (1973-10-01), Bidwell
patent: 3932916 (1976-01-01), Baker
patent: 4149460 (1979-04-01), Sato
patent: 4244081 (1981-01-01), Beyer et al.
patent: 4246643 (1981-01-01), Hubbard
patent: 4271758 (1981-06-01), Osterhof

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