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Expired Canadian patentCanada

Apparatus for stacking flat articles, preferably of double bags made ofplastic film

CA 1283133 C · Owner: Achelpohl, Fritz · Inventors: Achelpohl, Fritz

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

An apparatus for stacking flat articles which, preferably consist of double bags which have been severed by, hot wire welding from a tubular or semitubular web of plastic film and which adjacent to their center line have openingdefining edges and by a transfer device preferably consisting of a so-called wicketer which has pairs of transfer arms arranged in a starlike configuration and rotating about a horizontal axis, are deposited in a stacking station on an endless stack conveyor, which comprises tensile means which, are trained around reversing pulleys and are intermittently driven, in which the stack conveyor comprises two spaced apart parallel, revolving belts or chains, the retaining …

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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 April 16, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 16, 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.
FiledApril 3, 1987
GrantedApril 16, 1991
Term endedApril 16, 2008
Patent numberCA 1283133 C
Classification (IPC)B31B50/98

Timeline

Timeline From CIPO dates

1988199119941997200020032006Application filedApril 3, 1987Patent grantedApril 16, 1991Term endedApril 16, 2008

Sources & verification

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