Dot matrix print head energy control circuit
CA 1262950 C · Owner: Ncr Corporation · Inventors: Del Signore, James R. Ii
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure, A dot matrix print head energy control circuit (commonly known as voltage source compensation) utilizes two pulse width modulator circuits (one for receipt printing and one for forms printing). The control circuit also comprises control circuitry and a data latch, the circuitry including RC networks and comparators responsive to outputs of the data latch. A FORMS signal when inactive and utilizing a source, or applied voltage of 24 volts sets or selects the RC, network for receipt printing having an energizing pulse duration of approximately 340 microseconds and, the FORMS signal when active sets or selects the RC network for forms printing having an energizing …
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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 November 14, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 14, 2006.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
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.