Process and device for detecting print register marks on a multi-colour printing press
CA 2018449 C · Owner: Vitous, Vaclav · Inventors: Vitous, Vaclav; Kammenos, Panayotis; Roch, Roger Henri
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed is a process and device for detecting print register marks on a multi-colour printing press. The process consists in detecting a printed register mark composed of recognition signs and of colour pilot marks in comparing the, image of the signs of the print register mark to the signs of a virtual reference register mask and then in defining a basic area for each sign, in calculating the geometric centers of every basic area, in detecting in these basic areas a colour print pilot mark, in calculating and memorizing their geometrical center, in measuring the off-line positions (.DELTA.x to .DELTA.x2 and .DELTA.y to .DELTA.y2) between the geometrical centers of the basic areas and the …
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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 June 7, 1990 and granted March 29, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 7, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 7, 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
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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.