Dot matrix impact printer having retractable platen

Details Dot matrix impact printer having retractable platen Dot matrix impact printer having retractable platen

B - Operations, Transporting

41

J

197/84, 101/96.0

B41J 13/00 (2006.01) B41J 11/20 (2006.01)

Patent

CA 1069381

ABSTRACT OF THE DISCLOSURE The present invention is an improvement of the prior art dot matrix impact printers. In lieu of a constant gap between cylindrical platen and the printing plane where printing impact is made, the present invention utilizes a retractable platen that is capable of compensating for the additional thickness created by the insertion of a non-continuous form between the print plane and the retractable platen. Photodetectors are used to sense the introduction of a non-continuous form so that a solenoid actuated roller may be brought to bear against the non-continuous form thereby causing it to index or move with the paper from the paper roll in the printer. As a result, a printing will occur on the form, rather than the paper.

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