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Expired Canadian patentCanada

Pre-packaged pressure sensitive tear tape

CA 1328779 C · Owner: Kt Industries Ltd. · Inventors: O'Connor, Lawrence J.

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 narrow tape of polyester or other suitable plastic for use as a tear tape in the packaging industry slit from a wide web of the material is coated, wholly on one side and preferably at the edges with a suitable release material. Downstream of the slitting the tape is printed on the other side, then coated over the printing with a suitable pressure sensitive adhesive, said coating width being narrower than the width of the tape covering the printing and spaced from both side edges of the tape to avoid pick-off onto tape guide surfaces. The tape is then wound onto a core with both radial and axial traversing movements. The tape is then supplied to the packaging line preformed with adhesive …

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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 April 26, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 26, 2011.
  • 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 12, 1988
GrantedApril 26, 1994
Term endedApril 26, 2011
Patent numberCA 1328779 C
Classification (IPC)C09J7/02

Timeline

Timeline From CIPO dates

19891992199519982001200420072010Application filedJan 12, 1988Patent grantedApril 26, 1994Term endedApril 26, 2011

Sources & verification

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