Heatable roller
CA 2132935 A1 · Owner: Walzen Irle Gmbh · Inventors: Conrad, Hans-Rolf
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A heatable roller for calenders, smoothing machines or the like includes, heating channels with entry and discharge connection systems at each end thereof. Each entry and discharge connection system consists of at least two connection channels which lead from a common chamber and end in the heating channels with differing distances from the roller ends. The connection channels can be individually activated by a selection device having its own temperature control circuit. In this manner the temperature of the heatable roller can be influenced with respect to the width of the material processed.
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 September 26, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 26, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 26, 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.