Roller for a winding machine
CA 2245160 C · Owner: Muller, Georg · Inventors: Peters, Hans-Friedrich; Muller, Georg
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
It is known that in order to wind up webs (1) of paper or cardboard it is possible to use winding machines with rollers that have a hollow, cylindrical support body (7) that is of rigid material, with a deformable layer applied to its outside surface. The deformable layer (9) is of a cellular plastic material that incorporates a large number of evenly distributed pores, the size of which is smaller than 5 mm, and is preferably between 0.05 and 1 mm. The pores include partially open pores and closed pores. The compression modulus k is less than 10 MPa. It is preferred that the roller according to the present invention be used in the winding machine as a carrier roller (5) or a pressure …
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
- Filed January 15, 1997 and granted August 5, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 15, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 15, 2019.
- 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.