Typewriting machines – Carriage or carriage-moving or movement-regulating mechanism – Carriage – per se – or guideway therefor
Patent
1989-12-19
1992-02-11
Burr, Edgar S.
Typewriting machines
Carriage or carriage-moving or movement-regulating mechanism
Carriage, per se, or guideway therefor
400 59, 400320, B41J 25304
Patent
active
050871412
ABSTRACT:
A printer in which a single pinch roller serves the dual function of a pinch roller cooperating with the drive roller to feed paper to the printing zone, and a carriage guide to guide movement of the printhead carriage. This roller automatically properly references the printhead to the printing surface, regardless of paper thickness. The printhead carriage, which is pivotally mounted to a carriage guide rod, rests in contact with and rides along the roller. Preferably, the center of gravity of the printhead carriage is spaced from the carriage guide rod and is disposed above the pinch roller, and the pinch roller is spaced from the carriage guide rod, so that the printhead carriage is preloaded into continual contact with the carriage guide rod. The carriage guide rod may be disposed either on the same side of the printhead carriage as the pinch roller, or on the opposite side of the carriage from the pinch roller.
REFERENCES:
patent: 4420269 (1983-12-01), Ackermann et al.
patent: 4589784 (1986-05-01), Valle et al.
patent: 4798374 (1989-01-01), Ito
patent: 4842261 (1989-06-01), Thogersen et al.
patent: 4961658 (1990-10-01), Takagi
Burr Edgar S.
Hewlett--Packard Company
Hilten John S.
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