Method and apparatus for eliminating the flutter of a paper web in the dryer section of a papermaking machine between two single felt configurations therein
CA 2095461 C · Owner: Valmet Paper Machinery Inc. · Inventors: Haverinen, Timo; Tyrmi, Jouko
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An apparatus for eliminating the flutter of a paper web (W) in the dryer section of a papermaking machine between two single felt configurations thereof comprises a vacuum transfer roll (4), around which a dryer fabric (F2) of a second configuration is adapted to wind and along which a transfer point is located. In addition the apparatus, includes blowing means, comprising a surface located on, the side of a section of a first configuration dryer fabric (F1) upstream of a contact point between said web (W) and said second configuration dryer fabric (F2) and facing said section of fabric (F1), as well as a fan (P2) and a space (13) connected therewith by way of a duct for, creating a vacuum …
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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 May 4, 1993 and granted March 25, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 4, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 4, 2015.
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.