Bidirectional motion to unidirectional motion translator

Details Bidirectional motion to unidirectional motion translator Bidirectional motion to unidirectional motion translator

1980-11-03

1983-12-27

Staab, Lawrence J.

Typewriting machines

Including interposed inking device for record-medium

Ribbon-feeding mechanism

4001961, 400208, 400236, 74812, B41J 3314, B41J 3304

Patent

active

044227868

ABSTRACT:
A motion translator is used in an impact printer of the type having a printhead and platen that move relative to each other, for driving the print ribbon in a single, fixed direction. A drive cable has each end connected to opposite sides of the frame of the printer and is wrapped 360.degree. around a flange of the outer housing of the translator. The translator is rotatably mounted on the printhead carriage so that as the carriage moves relative to the platen, the housing is rotated by the drive cable. An upper clutch engages a driven, output shaft when the housing is rotated in one direction and does not engage the shaft when the housing is rotated in the opposite direction. A hubbed drive gear is positioned to rotate opposite the rotation of the housing. A lower clutch turns the driven, output shaft in the fixed direction when the housing rotates in the opposite direction by engaging the hub of the drive gear. When the housing is rotated in the one direction, the lower clutch does not engage. Therefore, the driven output shaft provides the fixed direction irrespective of the direction of motion between the printhead and platen.

REFERENCES:
patent: 2588187 (1952-03-01), Weiser
patent: 3853024 (1974-12-01), Vesci
patent: 4300847 (1981-11-01), Hoffman et al.
IBM Technical Disclosure Bulletin, "Ribbon Drive", Darwin, vol. 19, No. 4, Sep. 1976, pp. 1407-1408.

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