Thermal printer

Details Thermal printer Thermal printer

1988-10-11

1990-07-03

Eickholt, Eugene H.

Typewriting machines

Typing by other than type-face or type-die

Thermal

346 76PH, 219216PH, B41J 302

Patent

active

049386166

ABSTRACT:
A thermal printer comprises a pair of fixed frames for rotatably supporting a platen, a head unit movable relatively to the fixed frames and swingably supporting an elongated thermal head around its intermediate portion, a pair of leaf springs, one end of which resiliently urges the head unit toward the fixed frames so that the thermal head is pressed resiliently against the platen across a paper sheet, and a cam member having cam faces which are selectively engaged with the other end of the leaf spring for changing the urging force of the leaf spring by stages in accordance with the quality of the paper sheet.

REFERENCES:
patent: 4169682 (1979-10-01), Norman
patent: 4397576 (1983-08-01), Drejza et al.
patent: 4562444 (1985-12-01), Nagashima et al.
patent: 4650351 (1987-03-01), Engle et al.
patent: 4654673 (1987-03-01), Yawata et al.
patent: 4744680 (1988-05-01), Hirosaki et al.
patent: 4818126 (1989-04-01), Brooks et al.
patent: 4830523 (1989-05-01), Sparer et al.
patent: 4844632 (1989-07-01), Minowa

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