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Expired Canadian patentCanada

Tension prefinishing with sizing stands

CA 1264838 C · Owner: Morgan Construction Company · Inventors: Shore, Terence Michael

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

A method and apparatus for controlling the gauge of a product, such as for example a rod or bar as the, product is passing from an upstream roll stand to a finishing block. The product is rolled under tension between successive sizing stands arranged between the upstream roll stand and the finishing block. Variable loops are introduced in the product between the upstream stand and the first sizing stand as well as betwen the second sizing stand and the finishing block. Cross sectional dimensional measurements are taken of the product emerging from the second sizing stand, and signals representative of such measurements are employed by a controller to vary the product tension between 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 January 23, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 23, 2007.
  • 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 1, 1986
GrantedJanuary 23, 1990
Term endedJanuary 23, 2007
Patent numberCA 1264838 C
Classification (IPC)B21B1/18 +1 more

Timeline

Timeline From CIPO dates

1987199019931996199920022005Application filedApril 1, 1986Patent grantedJan 23, 1990Term endedJan 23, 2007

Sources & verification

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