Method and assembly for wrapping rolls, paper rolls in particular, in a wrapper sheet
CA 2061102 C · Owner: Valmet Paper Machinery Inc. · Inventors: Niskanen, Tapio; Nieminen, Hannu
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention concerns a method and assembly for wrapping paper rolls in a wrapping material (12). The method employs such wrapping material that incorporates a heat-meltable laminate layer (26). According to the method the paper roll (23) is rotated on support rolls (13) the, wrapper (12) is guided about the roll (23) so that the laminate layer (26) comes against the roll the wrapper (12), is adhered to the roll by applying energy onto the wrapper in order to attain the melting of the plastic film laminate whereby the wrapper (12) adheres to the roll (23) and the, roll (23) being rotated is wrapped into at least one turn of the wrapper. According to the invention the wrapper …
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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 12, 1992 and granted April 24, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 12, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 12, 2014.
- 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.