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Expired Canadian patentCanada

Sheet metal cutting

CA 1072003 A · Owner: Potomac Applied Mechanics Inc. · Inventors: Stubbings, James H.

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

Pattern cutting of sheet metal is effected automatically, Conveyors move a metal sheet into a pattern cutting position, the sheet being guided exactly into position, The sheet is clamped securely in pattern cutting position and a cutting tool begins cutting the pattern from the sheet. The cutting tool is movable in x y, and, ? directions so that any type of pattern may be cut thereby. The tool may comprise a scissors-like shearer one blade, being provided above the horizontal sheet being cut and, another blade being disposed below the sheet. Supporting tips are mounted on the conveyor to support the metal sheet in cutting position while preventing damage to the conveyor during cutting. A …

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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 February 19, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 19, 1997.
  • 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—
GrantedFebruary 19, 1980
Term endedFebruary 19, 1997
Patent numberCA 1072003 A
Classification (IPC)B23D15/08

Timeline

Timeline From CIPO dates

198119831985198719891991199319951997Patent grantedFeb 19, 1980Term endedFeb 19, 1997

Sources & verification

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