Method and apparatus for producing half-tone separations in color imaging
CA 2050289 A1 · Owner: Color Group (The) · Inventors: Sosa Trivino, Vicente; Coderch Collell, Marcel
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of generating a set of half-tone screens (18) for color printing (20) using a digital computer (14) and an x-y plotter (16), including the steps of generating and storing a separate and unique screen function matrix (26) for each of the half-tone screens (18), each matrix (26) comprising a set of light intensity level values in increments going from zero to a maximum the, sequence of numbers being a predetermined pattern that is different from each matrix (26), generating and storing a picture matrix of values representing the pixel portions and desired levels of color intensity of each basic color at the positions in the picture to be printed, creating each screen (18) by …
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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 7, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 7, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 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.