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Expired Canadian patentCanada

Apparatus for processing continuously-fed plastics material

CA 1067271 A · Owner: Attucci, Fernando · Inventors: Attucci, Enrico; Attucci, Fernando

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

Apparatus for processing continuously-fed plastics material in strip form comprises a cyclically operated working tool for example for welding and/or shearing the material. During operation of the tool the material is, stopped adjacent the working zone of the tool and a material storage loop is formed by the continuously incoming material.Subsequent to operation of the tool,the material is drawn from the loop at a higher speed than the infeed speed until the loop has been fully taken up and the material is stretched. - 1 -

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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 December 4, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 4, 1996.
  • 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—
GrantedDecember 4, 1979
Term endedDecember 4, 1996
Patent numberCA 1067271 A
Classification (IPC)B29C31/00 +2 more

Timeline

Timeline From CIPO dates

198019821984198619881990199219941996Patent grantedDec 4, 1979Term endedDec 4, 1996

Sources & verification

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