Winding device and chuck therefor
CA 1093526 A · Owner: E.I. Du Pont De Nemours And Company · Inventors: Campo, Edgar A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure, A slit web rewinding assembly is disclosed including a winding device with a pivotal arm a chuck, and a pressure-regulated fluid cylinder. The chuck includes at least one core retaining spring of special design and the fluid cylinder is universally connected to the arm by a ball and socket.
Read the whole patent
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 January 13, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 13, 1998.
- 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.