Article stopping apparatus
CA 2069613 C · Owner: John Brown Inc. · Inventors: Pouliquen, Alain N.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Apparatus for separating sequential batches of overlapping sheets includes a conveyor (4) of laterally spaced belts. Lift bars (13) secured to tubes are mounted for vertical positioning above the belts to raise the sheets from the conveyor and remove the moving force. The lift bars include spaced vacuum openings (12) coupled to the tube, which is coupled to a vacuum source. The openings are spaced for alignment with the trailing portions of sheets moving through the conveyor. A piston (15) in the tube selectively opens and closes the openings. The tubes are pivotally mounted at the downstream ends and the piston projects from the upstream end of the tube. A cam drive reciprocates the …
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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 September 26, 1991 and granted December 3, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 26, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 26, 2013.
- 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.