Method for spot position control in an optical output device employing a variable wavelength light source
CA 2068060 C · Owner: Xerox Corporation · Inventors: Paoli, Thomas L.; Appel, James J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In an optical output device wherein a beam of light is generated and focused to a spot upon an image plane, such as a photoreceptor in a xerographic printingapparatus an method for controlling the position of the spot in the slow scan direction of the image plane including the steps of generating a beam of light deflecting the beam of light by way of an optical beam deflecting element such that the optical beam deflecting element deflects the path of the beam of light by anamount that is determined by the wavelength of the light beam and varying the, wavelength of the beam of light such that the amount that the beam of light is deflected by the optical beam deflecting element is varied to …
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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
- Filed May 6, 1992 and granted April 28, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 6, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 6, 2014.
- 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
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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.