Typewriting machines – Including type-set-assemblage mounted on carrier and... – Including endless-band carrier for type-faces
Patent
1989-07-21
1991-09-03
Crowder, Clifford D.
Typewriting machines
Including type-set-assemblage mounted on carrier and...
Including endless-band carrier for type-faces
400185, 400569, 101 9313, 101111, B41J 120
Patent
active
050447920
ABSTRACT:
A microprinter for use in combination with such compact equipments as electronic calculator. The microprinter comprises a type belt driven through a belt pulley by a motor, a type selecting ratchet wheel combined with the belt pulley for rotation together with the latter, a hammer for pressing a selected type of the type belt to print the type on a recording sheet, a main printing gear driven by the motor, a selector lever capable of selectively engaging the type selecting ratchet wheel or the main printing gear, an armature plate associated with the selector lever, an electromagnetic clutch for driving the armature plate, and a sheet feed lever interlocked through the armature plate with the electromagnetic clutch. The motor drives sheet feed rollers for rotation through a LF clutch gear and a LF cam, the sheet feed lever is driven for turning through the armature plate and the electromagnetic clutch by the motor while the same is released from the limiting plate for limiting the swing motion of the sheet feed lever, the sheet feed lever is driven through the armature plate and the electromagnetic clutch by the motor so that the retaining pawl thereof engages a recess formed in the LF clutch gear to restrain the LF clutch gear from rotation, and the sheet feed lever is allowed to return to its home position when the armature plate is released from the electromagnetic clutch so that the retaining pawl thereof is disengaged from the recess of the LF clutch gear to allow the LF clutch gear to rotate.
REFERENCES:
patent: 3793951 (1974-02-01), Denley
patent: 4386863 (1983-06-01), Rooney
patent: 4443123 (1984-04-01), Ono et al.
patent: 4455936 (1984-06-01), Hori
patent: 4715737 (1987-12-01), Hori
patent: 4778294 (1988-10-01), Taniguchi
Alps Electric Co. ,Ltd.
Crowder Clifford D.
Heid David W.
Keating Joseph R.
Shoup Guy W.
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