Winder for rolling webs of material, especially for winding paper or cardboard webs into reels
CA 2273041 C · Owner: Schonmeier, Herbert · Inventors: Schonmeier, Herbert; Peters, Hans-Friedrich
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
To roll paper or cardboard sheets (1) into reels (3) known winders have devices to turn the reel (3) and generate tension along the sheet (1) during rolling, as well as a contact roll (4, 19) that contacts the reel (3) under pressure. The contact roll (4, 19) together with the reel (3) forms a nip through which the sheet (1) is fed towards the reel (3). According to the invention, so as to carry at least part of the reel weight at least one , additional support reel (16 20, 25) is placed underneath the reel (3). This support reel extends parallel to the axis of the contact roll (4 19), is , mounted in such a way that it can rotate freely or can be switched to freewheel position, and …
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 November 5, 1997 and granted September 16, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 5, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 5, 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.