Thermal printer having a press releasing mechanism
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United States of America Patent
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Jul 7, 1998
Grant Date -
N/A
app pub date -
Apr 8, 1996
filing date -
May 27, 1994
priority date (Note) -
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Abstract
The present invention is provided with a head pressing mechanism for pressing a thermal head against a platen, a paper feeding mechanism for feeding print paper between the thermal head and the platen in a secondary scanning direction, a ribbon transporting mechanism for transporting an ink ribbon between the thermal head and the platen in the secondary scanning direction, and a press releasing mechanism for causing the thermal head to move away from the platen against a pressing force of the head pressing mechanism. The press releasing mechanism slides a rod of a solenoid, elongated in the secondary scanning direction, at the position opposing to the rear surface of the thermal head in the secondary scanning direction. A lever link transforms this sliding action into the departing action of the thermal head from the platen. The solenoid and the thermal head are longitudinally aligned substantially in parallel to each other, and the area occupied by the thermal head and the solenoid is reduced, thereby resulting in a thermal printer which is compact as a whole.
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