Process and device for changing winding rollers
CA 2068641 C · Owner: Kuhnhold, Michael · Inventors: Fischer, Wolfgang; Kuhnhold, Michael; Dropczynski, Hartmut
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In a procedure fox changing the winding rolls (3) in machines used to wind webs of material (4) in particular paper or cardboard, onto cores, it is known that double-sided adhesive strips (31, 34) can be applied to the web (4) in order to secure the start of the web on a new core and/or start the end of a web onto a full winding roll (3). According to the present invention the adhesive strips (31, 34), axe first applied to a transfer element (transfer roll 21) that has little adhesion and which can be moved against the web (4) and then the transfer element (transfer roll 21) is moved against the web (4) and the adhesive strips (31 34) are transferred to, this.
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 August 26, 1991 and granted December 10, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 26, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 26, 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.