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Expired Canadian patentCanada

Dynamically stable sheet clamping system for high speed sheet handling drums

CA 1322489 C · Owner: Mcauley, Kenneth A. · Inventors: Labelle, Theodore J.; Mcauley, Kenneth A.; Haimberger, Walter P.

CIPO record

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

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Abstract From the Canadian patent

A sheet clamping system for high speed rotatable drums is provided in which light-weight clamping bars, formed of relatively thin metal sheet stock, are configured and/or oriented for maximum resistance to deflection radially of the axis of drum rotation as well as positively secured in a sheet medium clamping position at axially spaced intervals along the length of the drum. The system further includes centrifugally actuated, axially extending rods positioned to underlie the operative portion of each clamping bar in a manner such that leading and trailing edges of a retained sheet are sandwiched between the rods and the clamping bars under a clamping force generally proportional to 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 September 28, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 28, 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.
FiledAugust 24, 1989
GrantedSeptember 28, 1993
Term endedSeptember 28, 2010
Patent numberCA 1322489 C
Classification (IPC)B65H5/04 +2 more

Timeline

Timeline From CIPO dates

1990199319961999200220052008Application filedAug 24, 1989Patent grantedSep 28, 1993Term endedSep 28, 2010

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