Rewinding machine for coreless winding of a log of web material with a surface for supporting the log in the process of winding
CA 2115497 C · Owner: Biagiotti, Guglielmo · Inventors: Biagiotti, Guglielmo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A rewinding machine for the production of logs (R) of web material (N) without a core comprises: a first winding roller (1) onto which the web material is fed; a second winding roller (3) rotating in the same direction as the first roller and forming a nip (4) therewith through which the web material passes; means (15 17) to move the, surface of said second winding roller (3) toward said first winding roller (1); and means to sever said web material at the end of the winding thereof to for a log (R). Provision is also made for a surface (21, 21A) supporting the log (R2) in the process of formation and located upstream of the nip (4) between said rollers (1, 3).
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 February 11, 1994 and granted March 9, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 11, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 11, 2016.
- 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.