Methods and apparatus for centering a log and for supplying a log to be centered
CA 2111614 C · Owner: Oji, Koichi · Inventors: Mutsuura, Tetsutaro; Hashimoto, Soichi; Murakami, Masanori
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Periphery detectors are arranged being juxtaposed closely along the, longitudinal direction of the log which is to be rotated one revolution around avirtual center thereby a plurality of peripheries of cross sections along the longitudinal direction are detected for the log. The direction of the largest right circular cylinder is determined according to the largest inscribed circles for the peripheries of three cross sections (i.e. the ones adjacent to both the ends of the log and the one in the middle of the log) and the largest right circular cylinder itself is determined according to the peripheries of all cross sections detected. Thus thecenter line of said largest right circular …
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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 December 16, 1993 and granted November 24, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 16, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 16, 2015.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.