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Expired Canadian patentCanada

Blow box for dryer section

CA 1294429 C · Owner: Beloit Corporation · Inventors: Wedel, Gregory L.

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

An apparatus is described for maintaining a first and second lateral edge of a web in close conformity with a dryer felt of a papermaking machine. The apparatus includes a first dryer drum which is rotatable about an axis which is parallel to the cross-machine direction of the web. A second dryer drum is rotatable about an axis which is spaced and parallel relative to the axis of the first dryer drum. An intermediate transfer roll has an axis of rotation disposed in a plane parallel to and, between, the axes of the first and second drums such that the web and the felt extend contiguously around the first dryer drum and then around the transfer roll and subsequently around the second drum in …

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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 January 21, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 21, 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 1, 1988
GrantedJanuary 21, 1992
Term endedJanuary 21, 2009
Patent numberCA 1294429 C
Classification (IPC)D21F5/04

Timeline

Timeline From CIPO dates

1989199219951998200120042007Application filedSep 1, 1988Patent grantedJan 21, 1992Term endedJan 21, 2009

Sources & verification

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