Shutter calibration and document size detection
CA 2017260 C · Owner: Xerox Corporation · Inventors: Budnik, Roger W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An apparatus in which shutters used to occlude the region of the platen not supporting the original document being reproduced are calibrated. After the fully open position of the shutters is determined the, size of each original document being reproduced may be determined. In calibrating the shutters, an original document having a predetermined size is positioned on the platen with one set of perpendicular edges thereof being located at a registration position. The shutters are moved from the fully open position to another set of perpendicular edges of the document. The distance that the shutters move between the open position and the edges of the document is measured. With this information …
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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 22, 1990 and granted November 5, 1996. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 22, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 22, 2012.
- 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.