Method and apparatus for calendering a sheet material web carried by a fabric
CA 2291384 A1 · Owner: Otto, Kurt T. · Inventors: Otto, Kurt T.; Perkins, James M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An apparatus for calendering a sheet material web being carried on or between one or more carrier fabrics. In a preferred embodiment the apparatus, includes a calender section having first and second calender rolls forming a nip, therebetween. At least one carrier fabric is disposed between the first and second calender rolls. The first and second calender rolls apply a load to the carrier fabric and sheet material web as they pass through the nip between the calender rolls so as to reduce the caliper or thickness, of the sheet , material, web. A method for calendering the sheet material web includes carrying the sheet material web on one or more carrier fabrics through the calender nip …
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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 November 25, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 25, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 25, 2021.
- 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.