Determination of the register error in multi-colour printing
CA 1300921 C · Owner: Graf, Jean-Pierre · Inventors: Jeschke, Willi; Graf, Jean-Pierre; Ott, Hans
Overview
Its claims, description and drawings are in the Canadian Patents Database.
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Determination of the reqister error in multi-colour printing Abstract, To determine the register error in multi-colour printing, a specially deslgned hand-held measuring device, used in off-line mode, is placed on the printed sheet ln the region of special register marks. The hand-held device then scans the register mark photoelectrically and calculates the register error. Scanning is performed circularly or linearly by means of a rotatlng or a reciprocating scanning head respectively. To increase the precision and measuring reliability, special, basically angular register marks, are provided and the scanning apparatus is specially tailored to the particular shape of the register marks. …
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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 May 19, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 19, 2009.
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Timeline
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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.