Character selecting mechanism for a serial printer

Details Character selecting mechanism for a serial printer Character selecting mechanism for a serial printer

1985-06-06

1987-03-31

Sewell, Paul T.

Typewriting machines

Including type-set-assemblage mounted on carrier and...

Including type-faces movable relative to type-face-carrier

400169, 4001442, 400229, B41J 132

Patent

active

046539441

ABSTRACT:
A serial printer of the print thimble type is provided with a character selecting mechanism tied in with the ribbon advance mechanism. A drive gear is rotationally rigid with the print thimble and is driven to rotate by a gear of greater thickness than the vertical shift experienced by the drive gear when switching between characters located on vertically spaced circumferences of the print thimble. A locking pawl mechanism rotationally locks the drive gear during printing to stabilize the print thimble to improve printing quality. The locking pawl is actuated by a cam mechanism driven by the ribbon advance.

REFERENCES:
patent: 3419125 (1968-12-01), Spaleny
patent: 4389126 (1983-06-01), Honma et al.
patent: 4472073 (1984-09-01), Valle et al.
patent: 4509872 (1985-04-01), Shimogawara

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