Method and apparatus for controlling the velocity of ink drops in an ink jet printer
CA 1098160 A · Owner: International Business Machines Corporation · Inventors: Zable, Jack L.; Tomasky, Thomas; Jensen, Donald F.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In an ink jet printer drops are generated, at a test frequency which is a harmonic of the drop generation rate for printing. If an error in velocity is detected at the test frequency a, coarse correction velocity is made to bring the correct number of drops within the range of onehalf the wavelength at the nth drop location relative to a drop detector. Drops are then generated at the printing frequency and a fine correction in the velocity is made if a velocity error is detected.
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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 March 24, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 24, 1998.
- 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.