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Expired Canadian patentCanada

Method for rolling metal sheets

CA 1286897 C · Owner: Ikeda, Mitsuhiro · Inventors: Hongo, Yuichi; Muramatsu, Kiyoshi; Yanai, Toshio

CIPO record

Overview

Drawings and full text

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

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Abstract From the Canadian patent

A pair of tapered work rolls are arranged to confront each other and the work rolls are shifted to locate the side edges of a material to be rolled at the tapered portions of the work rolls, by adding the quantity of the movement of the taper-initiating point by wearing of the rolls to the shift quantity of the rolls, and rolling is carried out while maintaining an effective adjustment of the crown quantity (effective shift quantity). Therefore, defects such as edge drop and high spot can be effectively prevented and the crown quantity can be freely controlled, and accordingly a, desired crown quantity can be easily obtained. Therefore, this rolling method is very valuable from 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 July 30, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 30, 2008.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJanuary 8, 1988
GrantedJuly 30, 1991
Term endedJuly 30, 2008
Patent numberCA 1286897 C
Classification (IPC)B21B31/18 +2 more

Timeline

Timeline From CIPO dates

1989199119931995199719992001200320052007Application filedJan 8, 1988Patent grantedJuly 30, 1991Term endedJuly 30, 2008

Sources & verification

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