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Expired Canadian patentCanada

Web-dryer threading apparatus having anti-centrifugal structure

CA 1059809 A · Owner: Midland-Ross Corporation · Inventors: Beke, Zoltan; Mcanespie, Donald I.

CIPO record

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Drawings and full text

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

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Abstract From the Canadian patent

Abstract of the Disclosure, Disclosed herein is a web-treating system equipped with web-threading apparatus having as principal structure pulleys, in endwise coaxial relation with web-conveying rolls an endless, drive cable extending over the pulleys and a web-tail gripping, device with transversely elongate elements thereof supported in the web path by the drive cable. Such elements and the pulleys are especially constructed to engage in an interlock condition as the elements traverse portions of the web path around the rolls so as to prevent the elements from centrifugally swinging away from the web path.

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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 August 7, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 7, 1996.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Filed—
GrantedAugust 7, 1979
Term endedAugust 7, 1996
Patent numberCA 1059809 A
Classification (IPC)D21G9/00

Timeline

Timeline From CIPO dates

198019821984198619881990199219941996Patent grantedAug 7, 1979Term endedAug 7, 1996

Sources & verification

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