Dot matrix impact printer having retractable platen
CA 1069381 A · Owner: Bunker Ramo Corporation · Inventors: Kwan, Okun; Jeffreys, Robert
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
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 …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted January 8, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 8, 1997.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.