The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 14, 1992
Filed:
Nov. 19, 1990
Wasuke Sato, Tokyo, JP;
Showa Denko K.K., Tokyo, JP;
Abstract
A lid for a can-shaped container which lid is adapted to be connected to a peripheral wall of the can-shaped container is disclosed which comprises a can-shaped container lid base having a gas barrier-type multi-layer base, a thermoplastic resin layer, a score portion formed by thinning part of the thermoplastic resin layer on the upper surface of the bottom of the base into an annular shape; and a synthetic resin tab for opening the can-shaped container lid. The tab is connected to an upper surface of a tab seat constituted by that portion of the thermoplastic resin layer disposed inwardly of the score portion. The score portion is provided by forming a tunnel-like groove at the outer periphery of the tab seat in such a manner that the tunnel-like groove has a suitable height from the surface of contact between the tab seat and the bottom of the can-shaped container lid base, with the thermoplastic resin layer remaining on its outer side above the tunnel-like groove, so as to expose the upper bottom surface of the base to the base to the interior of the tunnel-like groove.