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Expired Canadian patentCanada

Apparatus for tensioning and deforming saw blades

CA 1322286 C · Owner: Williams And White Machine Shop · Inventors: Williams, Christopher

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

An apparatus for tensioning the metal in the saw blade and at the same time deform the saw blade allowing the saw to cut a narrow kerf. The apparatus dishes or deforms the saw blade to remove kinks therein, it includes a support for the saw blade which permits movement in the face plane a fist, pair of rolls mounted for rotation on a single axle with a spacer therebetween, one roll having a larger diameter than the other roll, positioned to engage one face of the saw blade, a second pair of rolls, substantially the same as the fist pair of rolls, mounted for rotation on a single axle substantially parallel to the axle for the first pair of rolls, positioned to engage on the opposite face of …

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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 September 21, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 21, 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.
FiledAugust 22, 1989
GrantedSeptember 21, 1993
Term endedSeptember 21, 2010
Patent numberCA 1322286 C
Classification (IPC)B23D63/18

Timeline

Timeline From CIPO dates

1990199319961999200220052008Application filedAug 22, 1989Patent grantedSep 21, 1993Term endedSep 21, 2010

Sources & verification

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