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Expired Canadian patentCanada

Automatic document feeder/separator for copiers

CA 1303633 C · Owner: Looney, John H. · Inventors: Looney, John H.

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

In a sheet feeding system for a copier for the sequential, separation and feeding of individual sheets from a stack of sheets by an impact type sheet feeder, there is provided a plural mode stack repositioning system for automatically repositioning the top sheet of the stack of sheets into an optimum feeding position relative to the impact sheet feeder, which optimum feeding position is closely adjacent to but, slightly spaced below, a maximum limit position of the top of the stack. This stack repositioning system further provides a retard repositioning mode in which the stack of sheets is automatically lowered into a retard position after each sheet feed has been initiated which retard …

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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 June 16, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 16, 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.
FiledMarch 16, 1988
GrantedJune 16, 1992
Term endedJune 16, 2009
Patent numberCA 1303633 C
Classification (IPC)B65H3/52 +2 more

Timeline

Timeline From CIPO dates

1989199219951998200120042007Application filedMarch 16, 1988Patent grantedJune 16, 1992Term endedJune 16, 2009

Sources & verification

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