Method and apparatus for adjusting contact pressure of a thermal

Details Method and apparatus for adjusting contact pressure of a thermal Method and apparatus for adjusting contact pressure of a thermal

1991-04-08

1993-04-27

Fuller, Benjamin R.

Recorders

Thermal recording

B41J 25304, B41J 25312

Patent

active

052066622

ABSTRACT:
A method and apparatus for adjusting the contact pressure of a thermal printhead against a platen roller. In response to the receipt of a control signal, a spring mechanism is activated to apply a torque against an arm attached to a shaft. Rotation of the shaft first brings the printhead into contact with a thermal medium which passes between the printhead and the platen roller. After the printhead contacts the thermal medium, further force applied through the spring selectively increases the torque which, in turn, increases the pressure of the printhead against the thermal medium. The pressure is adjustable as a function of the thermal medium, print speed, user darkness preference and other variables.

REFERENCES:
patent: 4844632 (1989-07-01), Minowa
patent: 4879566 (1989-11-01), Hanabusa

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