Typewriting machines – Carriage or carriage-moving or movement-regulating mechanism – Carriage-feed mechanism
Patent
1977-06-27
1978-11-14
Sewell, Paul T.
Typewriting machines
Carriage or carriage-moving or movement-regulating mechanism
Carriage-feed mechanism
400328, B41J 304
Patent
active
RE0298328
ABSTRACT:
A mangle wheel having first and second toothed portions arranged in outer and inner arcuate paths forming a continuous loop is rotatably mounted on a support which is pivotally mounted within a housing. A gear is engaged with the continuous loop of teeth to drive the mangle wheel in one direction at a low speed and in the opposite direction at a high speed. A printer head unit is slidably mounted on a guide shaft pivotally mounted on the side walls of the housing. Rotation of the mangle wheel is transmitted to longitudinal movement of the printer head unit to thereby move the same in one direction to effect scanning and in the opposite direction to quickly return the same to the original position. The printer head unit is also movable transversely between an active position in which the head unit is in contact with the plane of a sheet of recording paper and an inactive position disengaged from contact with the paper surface. The support is movable within a limit of travel as the mangle wheel changes its direction of rotation and arranged to move the printer head unit to the inactive position during its return movement.
REFERENCES:
patent: 472539 (1892-04-01), Hill
patent: 3331316 (1967-07-01), Bretti
patent: 3628645 (1971-12-01), McFeaters et al.
patent: 3710912 (1973-01-01), Bretti et al.
patent: 3789969 (1974-02-01), Howard et al.
patent: 3833891 (1974-09-01), Howard et al.
Adams Bruce L.
Burns Robert E.
Lobato Emmanuel J.
Matsushita Electric - Industrial Co., Ltd.
Sewell Paul T.
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