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Expired Canadian patentCanada

Dryer felt run

CA 1233981 A · Owner: Beloit Corporation · Inventors: Ely, Donald A.

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

A web dryer structure for thermal removal of liquid from a traveling web such as a web of paper coming from the press section of a papermaking machine including a row of upper dryer drums and row of lower dryer drums with the drums positioned to carry the web in a sinuous path successively between upper and lower drums and the web wrapping the upper and lower surfaces of the drums respectively with upper and lower looped felts wrapping the web on the upper and lower surfaces of the drums with the felt guided by felt rolls which for the upper felt is beneath lower drums and for the lower felts are between the upper drums with the felt rolls being hollow roll shells and having glands therein …

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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 15, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 15, 2005.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledOctober 5, 1983
GrantedMarch 15, 1988
Term endedMarch 15, 2005
Patent numberCA 1233981 A
Classification (IPC)F26B13/08 +1 more

Timeline

Timeline From CIPO dates

19841987199019931996199920022005Application filedOct 5, 1983Patent grantedMarch 15, 1988Term endedMarch 15, 2005

Sources & verification

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