Method and device for regulating the temperature in a laser operated printing plate imaging unit of a printing press, particularly of an offset-printing press
CA 2201226 C · Owner: Presstek Inc. · Inventors: Schunn, Johann; Meyer, Helmut
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A laser-operated printing plate imaging device (1) for imaging an even printing plate (4) or a printing plate (4) mounted on a printing press plate cylinder (2) comprises one or multiple printing plate imaging units (5) the laser diode units (10) of which being operated in phase opposition with a heating element (18) arranged near the laser diode units (10) in, order to keep the temperature of the laser diode units (10) essentially constant during the imaging process.
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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 March 27, 1997 and granted February 1, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 27, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 27, 2019.
- 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.