Film severing method and apparatus
CA 1051773 A · Owner: E.I. Du Pont De Nemours And Company · Inventors: Ramsey, Harold E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A film severing method and apparatus is provided in which a film having first and second edges is engaged by film holding devices and the film is severed in a transverse path between such holding devices while the film is held on either side thereby, such severing including cutting the film at the first edge by moving a severing device into the film at a position spaced from the first edge and thereafter moving it in a first direction toward and through such first edge to form a partial cut and completing the severing of the film by moving another severing device in a second direction into the partial cut and thereafter through the film toward and through the second edge whereby to sever …
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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
- Granted April 3, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 3, 1996.
- 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.