Printer shuttle drive having castered cam followers

Typewriting machines – Carriage or carriage-moving or movement-regulating mechanism – Carriage-feed mechanism

Patent

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Details

74569, 101 9316, 400323, B41J 2528

Patent

active

044987935

ABSTRACT:
In a printer in which a shuttle and a counterbalancing mass are driven in opposing reciprocating fashion by a rotating, generally oval-shaped cam, the cam followers which couple the shuttle and the counterbalancing mass to the cam are castered to prevent skewing of the cam followers relative to the cam. Each of the cam followers is disposed between and rotatably mounted on a pair of opposite arms extending outwardly from a generally planar base of a castered yoke assembly, the planar base being pivotally coupled to a supporting member therefor which is either coupled to the shuttle or forms a part of the counterbalancing mass. In a first embodiment the pair of opposite arms extend from the planar base toward the cam so as to dispose the cam follower between the pivotal mount of the yoke assembly and the cam. In a second embodiment the pair of opposite arms extend from the planar base in a direction away from the cam so as to dispose the pivot point of the yoke assembly between the axis of rotation of the cam follower and the cam.

REFERENCES:
patent: 774496 (1904-11-01), Rivett
patent: 2007217 (1935-07-01), Rose
patent: 2404231 (1946-07-01), Harper
patent: 2567735 (1951-09-01), Scott
patent: 2592536 (1952-04-01), Buckendale
patent: 3561288 (1971-02-01), Mishra
patent: 3941051 (1976-03-01), Barrus et al.
patent: 4173954 (1979-11-01), Speckhardt

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