Head-pressure mechanism in thermal printer

Details Head-pressure mechanism in thermal printer Head-pressure mechanism in thermal printer

1987-12-30

1990-04-03

Wiecking, David A.

Typewriting machines

Typing by other than type-face or type-die

Thermal

346 76PH, 74461, B41J 320

Patent

active

049135678

ABSTRACT:
A printer wherein printing is effected while a print head and a recording medium are moved relative to each other with the print head in pressed contact with the medium. The printer includes a print-head support member for supporting the print head movably between a printing position and a release position. The printer further includes a support member and a displaceable member which are connected by an elastic member, so that the print head is moved from the release position to the printing position, and the print head in the printing position is pressed against the medium. The displacement of the displaceable member consists of a first movement for moving the print head to the printing position, and a second movement for enabling the elastic member to produce a biasing force for pressing the print head against the medium. An amount of displacement of the displaceable member per unit angle of rotation of the rotatable member is greater in the first movement than in the second movement.

REFERENCES:
patent: 674447 (1901-05-01), Mase
patent: 4396308 (1981-08-01), Applegate et al.
patent: 4641150 (1987-02-01), Matsuura et al.
patent: 4654673 (1987-03-01), Yanata et al.
"Motor Drive Arrangement . . . "; Applegate et al.; IBM Tech. Disc. Bull.; vol. 25, No. 11B, pp. 6236-6238; Apr. 1983.
"Path Equalizing for Guide Bar"; Craft; IBM Tech. Disc. Bull.; vol. 27, No. 1B, p. 891; Jun. 1984.

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