Method and apparatus for handling sheet material
CA 2005346 C · Owner: Western Insulated Glass Company · Inventors: Ellis, Benny J.; Daniels, Kurt H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Large sheets of float glass or other large sheets of material are transferred from a vertical storage position to a horizontal surface automatically. A carriage is mounted on a support frame near the stack of sheets of material which rest, against an inclined surface such that the bottom of each sheet is located forward of the top thereof to cause the plane of the stack of sheets to tilt a few degrees past vertical. A sheet engaging member is located on the carriage for pulling the top sheet of the stack forward, pivoting the sheet on its bottom to, a point where the top of the sheet is moved past vertical on the opposite side from the stack of sheets to an unstable position. In this …
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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 13, 1989 and granted April 12, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 13, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 13, 2011.
- 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.