Apparatus for the removal of material punched out from material in sheet form
CA 2014829 C · Owner: Christoffersson, Bjorn · Inventors: Christoffersson, Bjorn; Gerhardt, Jorgen
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to an apparatus for the removal of areas of material punched out from a material in sheet form by projecting, closed punching edges on the circumferential surface of at least one rotating punching cylinder by means of compressed air, which is fed into the punching cylinder and led out from the punching cylinder through outlet openings lying within the closed punching edges, wherein the compressed air from an opening in a side face of a member at least partially embracing the punching cylinder in a guided manner is fed to inlet openings assigned to the outlet openings, which inlet openings are located in a side face of the punching cylinder closely adjacent to the side …
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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 18, 1990 and granted April 30, 1996. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 18, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 18, 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
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.