Printer beam position feedback sensor
CA 1186237 A · Owner: Sperry Corporation · Inventors: Phillips, Edwin R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A beam feedback synchronization system for optical sweeping systems is disclosed. The system includes a multifaceted rotating reflection mirror which acts on a collimated light beam such as a laser beam, to cause it to sweep periodically in parallel straight lines across a rotating photoconducting drum. A circular reflector is positioned at a critical position between the rotating reflection mirror and the rotating photoconducting drum. This circular reflector causes a portion of this light to be split off from the main beam and reflected back upon a photodetection device which is positioned in close proximity to the rotating reflection mirror. The electrical signals from the photodetection …
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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 April 30, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 30, 2002.
- 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.