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Expired Canadian patentCanada

Press section in a paper machine

CA 1311955 C · Owner: Tamrock Oy · Inventors: Rantala, Mauri; Snellman, Yrjo

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 compact press section in a paper machine has a frame construction (2, 3, 4) in one or several sections and a roll arrangement (8, 9, 10). The roll arrangement comprises a central roll (9) and at least two press rolls (8, 10), which each form a nip (N2 N3) with the central roll (9). The press section additionally comprises members (5, 6, 8, 12, 13, 14 15) for guiding one or a plu-, rality of felts or similar and members (20) for cleaning the central roll. The central roll (9) is disposed movably with regard to the frame construction (2, 3, 4) by the transfer means (3" 18), connected with the frame construction and interlockable with this by the interlocking means (18) connected with the …

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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 December 29, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 29, 2009.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledSeptember 14, 1988
GrantedDecember 29, 1992
Term endedDecember 29, 2009
Patent numberCA 1311955 C
Classification (IPC)D21F3/00 +1 more

Timeline

Timeline From CIPO dates

1989199219951998200120042007Application filedSep 14, 1988Patent grantedDec 29, 1992Term endedDec 29, 2009

Sources & verification

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