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Expired Canadian patentCanada

Automatic tape threading apparatus for magnetic tape transports

CA 1189967 A · Owner: International Business Machines Corporation · Inventors: Mcmurtry, David H.; Gilovich, Paul A.; Crawford, Roy 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 method and apparatus is disclosed for automatically threading web material, e.g. magnetic tape from a re-, placable supply reel to a non-replacable take-up reel of a web transport device, e.g. a reel-to-reel type magnetic tape drive, in which the web path is nonlinear and relatively complex as a result of various components e.g. magnetic transducer tape guides, which act on the web while it is being transported. The apparatus comprises a coupling device and a mechanism for moving and guiding the coupling device between the supply reel and the take-up reel. The coupling device couples to a leader block attached to the tape at the supply reel. The mechanism moves and guides the coupling …

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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 July 2, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 2, 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.
FiledJune 5, 1981
GrantedJuly 2, 1985
Term endedJuly 2, 2002
Patent numberCA 1189967 A
Classification (IPC)G11B15/32 +1 more

Timeline

Timeline From CIPO dates

1982198519881991199419972000Application filedJune 5, 1981Patent grantedJuly 2, 1985Term endedJuly 2, 2002

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