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Expired Canadian patentCanada

Magnetic cylinders with image plate or blanket for offset printing

CA 1289007 C · Owner: Peekna, Andres · Inventors: Rosenfelder, Charles G.; Peekna, Andres

CIPO record

Overview

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

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Abstract From the Canadian patent

Magnetic cylinders with an image plate or an offset blanket carrier plate have annular pole pieces and magnets which maximize either the resistance of the plate to peel-off or the attractive force intensity with a nominal displacement of the plate from the cylinder for typical operating conditions. The plates are precurved preferably with a radius slightly less than the cylinder radius.

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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 September 17, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 17, 2008.
  • 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 6, 1986
GrantedSeptember 17, 1991
Term endedSeptember 17, 2008
Patent numberCA 1289007 C
Classification (IPC)B41F27/02 +2 more

Timeline

Timeline From CIPO dates

19871990199319961999200220052008Application filedNov 6, 1986Patent grantedSep 17, 1991Term endedSep 17, 2008

Sources & verification

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