Printhead mounting and movement control assembly

Details Printhead mounting and movement control assembly Printhead mounting and movement control assembly

1987-01-28

1987-11-10

Pearson, Charles

Typewriting machines

Typing by other than type-face or type-die

Thermal

346 76PH, 400711, B41J 320

Patent

active

047054140

ABSTRACT:
An assembly for positioning a print head so as to transfer ink from an ink ribbon to a printing medium positioned on a movable platen adjacent to said ribbon supports the print head on a rocker member which enables the head to be swung between a print position wherein it engages the ink ribbon and a feed position wherein the head is spaced from the ribbon enabling ribbon to be moved. The rocker is rocked to move the head between its two positions by a rotary cam driven by a small low-power electric motor. When the cam engages the rocker member at selected angular positions, the head is maintained in its retracted feed position; otherwise, the head resides in its print position. The assembly also includes provision for detecting the angular position of the cam so as to produce signals to facilitate repositioning the cam and head promptly.

REFERENCES:
patent: 3855448 (1974-12-01), Hanagata et al.
patent: 4225251 (1980-09-01), Klimek et al.
patent: 4421428 (1983-12-01), Noda et al.
patent: 4563692 (1986-01-01), Negita et al.

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