Typewriting machines – Typing by other than type-face or type-die – Thermal
Patent
1987-10-28
1988-10-04
Wright, Jr., Ernest T.
Typewriting machines
Typing by other than type-face or type-die
Thermal
346 76R, B41J 320
Patent
active
047752521
ABSTRACT:
A thermal printhead, which is pivotally mounted on a carrier, is moved into and out of its printing position by a four bar linkage, which is responsive to the direction in which the carrier is being advanced, rendering a spring, which urges the thermal printhead into its printing position, effective and ineffective. When the carrier is advanced from left to right to print, the linkage responds to a drive mechanism for the carrier to enable movement of the printhead into its printing position by the spring prior to the carrier drive mechanism moving the carrier. When the carrier is to be moved from right to left in the non-printing direction, the linkage responds to the initial motion of the carrier drive mechanism in this direction to render the spring ineffective and to move the printhead out of its printing position prior to the carrier drive mechanism moving the carrier.
REFERENCES:
patent: 4329075 (1982-05-01), Applegate et al.
patent: 4439777 (1984-03-01), Aprato
patent: 4563692 (1986-01-01), Negita et al.
patent: 4609299 (1986-09-01), Hattori et al.
patent: 4641150 (1987-02-01), Matsuura et al.
patent: 4657417 (1987-04-01), Kikuchi et al.
patent: 4707154 (1987-11-01), Arai
Applegate Steven L.
Molloy James J.
Tao Deh C.
International Business Machines - Corporation
Leach Frank C.
McArdle, Jr. John J.
Wright, Jr. Ernest T.
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