Easy-open lid
CA 1325189 C · Owner: Hatano, Yasushi · Inventors: Kaga, Yasuo; Iioka, Toshiaki; Taira, Kazuo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Easy-Open Lid, Abstract of the Disclosure The present invention relates to an easy-open vessel lid which is composed of a laminate of a metal roll and a resin and has opening weakened line. A reinforcing layer of a thermoplastic resin is formed independently from the resin of the laminate at least on the outer peripheral side of a part most protruding in the opening-initiating directions of an inside introducing weakened line to cover said weakened line astride of said weakened line. By this reinforcing layer ribbon, breaking can be effectively prevented and opening by, shearing of the lid member along the weakened lines can be performed assuredly and smoothly.
Read the whole patent
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 14, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 14, 2010.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.