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Expired Canadian patentCanada

Method for use in the press section of a paper machine

CA 1314166 C · Owner: Valmet Oy · Inventors: Soderholm, Nils

CIPO record

Overview

Drawings and full text

Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

The invention relates to a method for use in the press section of a paper machine. In the method a, web to be dried is led through the press section by closed feeding by passing it through nips between press rolls as a closed feeding through the press section. The web is led through at least two nips removing water from the web, one nip being formed between two press rolls having a separate felt loop and the other between a suction roll having the separate felt loop and belonging to the first nip as the other press roll thereof and a third press roll having a separate felt loop. For the elimination of the rewetting after the second nip the web is after the second nip separated at least from …

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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

  • Granted March 9, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 9, 2010.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledNovember 3, 1987
GrantedMarch 9, 1993
Term endedMarch 9, 2010
Patent numberCA 1314166 C
Classification (IPC)D21F3/00 +2 more

Timeline

Timeline From CIPO dates

19881991199419972000200320062009Application filedNov 3, 1987Patent grantedMarch 9, 1993Term endedMarch 9, 2010

Sources & verification

Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.