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Expired Canadian patentCanada

Tire constituting member winding tension controlling apparatus

CA 1317357 C · Owner: Bridgestone Corporation · Inventors: Hirai, Takayuki

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

Abstract of the Disclosure, A winding tension controlling apparatus controls tensile force to be applied to a tire constituting member spirally wound about a building drum. The apparatus comprises a memory device for storing patterns of tensile forces, a detecting sensor for always detecting winding positions of the tire member and a processing unit for obtaining a tensile force value from a pattern of tensile force received on the basis of the memory device and a detected result from the memory device and outputting the tensile force value as a control signal. The apparatus further comprises a regenerative control device for controlling a DC motor connected to a tension roller to cause 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 May 4, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 4, 2010.
  • 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 27, 1989
GrantedMay 4, 1993
Term endedMay 4, 2010
Patent numberCA 1317357 C
Classification (IPC)B29D30/30 +2 more

Timeline

Timeline From CIPO dates

1990199319961999200220052008Application filedApril 27, 1989Patent grantedMay 4, 1993Term endedMay 4, 2010

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