Process and device for winding continuous webs of material, in particular paper or carton
CA 2064064 C · Owner: Jagenberg Aktiengesellschaft · Inventors: Urban, Ernst-Gunther; Hehner, Reinhard
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In prior art processes for winding continuous webs of material (1), in particular paper or carton on to spools, the, material (1) pulled off a delivery roll against a braking force is divided, by cutting it along its length into individual, strips which are subsequently wound under tension onto individual rolls (19, 20). In order to be able to set different tensions for cutting and for winding at the winding stations (9, 10), the invention calls for the tension of the individual strips after cutting and before winding to be interrupted by passing the strips over a driven roller with which the strips lock fractionally. The tension is preferably interrupted by a free-running roll (22) which …
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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 1, 1991 and granted September 10, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 1, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 1, 2013.
- 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.