Gloss sensor resistant to tilting and shifting paper and with improved calibration
CA 2287287 A1 · Owner: Impact Systems, Inc. · Inventors: Typpo, Pekka M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A gloss sensor for determining the gloss of a surface for example, of moving , paper (11) being produced by a paper making machine. The gloss sensor (10) normally is installed in a scanner which scans the moving paper in a crosswise direction. It includes a standard TAPPI light source (14) which impinges upon the paper (11) at a specified angle and the intensity of the detected reflected light is related to gloss. Calibration is provided by an oscillation angle light source which with the same lamp has a direct reference path to the detector (36). Compensation for tilting or shifting paper is provided by the same oscillating light source which when the paper tilts of shifts still …
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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 April 30, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 30, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 30, 2020.
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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.