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Expired Canadian patentCanada

Material handling and sorting system

CA 1197809 A · Owner: Plessey Overseas Limited · Inventors: Rex, Michael P.

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

Mechanised mail sorting offices require packets to be sorted according to destination into one of many bags. A typical mechanised system includes a loading mechanism for transferring packets from stationary input pockets onto a continuously moving sequence of containers which pass all destinations in turn and unload as required. The system according to the invention consists of a number of separate self powered single trolleys (TL) which run on a tracking network. Each trolley (TL) is adapted to be programmed with the route to be taken to the destination of the packet(s) loaded into it. The trolley (TL) co-operates with en-route track-side signposts (TSB) enabling steering means (SM) in 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 December 10, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 10, 2002.
  • 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 26, 1982
GrantedDecember 10, 1985
Term endedDecember 10, 2002
Patent numberCA 1197809 A
Classification (IPC)B07C1/00 +2 more

Timeline

Timeline From CIPO dates

1983198519871989199119931995199719992001Application filedAug 26, 1982Patent grantedDec 10, 1985Term endedDec 10, 2002

Sources & verification

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