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:
Sep. 27, 1988
Filed:
Nov. 25, 1987
Heinz-Werner Nientiedt, Ellwangen, DE;
Josef Sekler, Ellwangen-Rattstatt, DE;
Varta Batterie Aktiengesellschaft, Hanover, DE;
Abstract
A plastic sealing member for sealing the housing cup of a round-type galvanic cell, and which is provided with a predetermined breaking point (bursting membrane or score) to prevent explosion of the cell during improper use, is covered on the surface which faces the inside of the cell with a pore-free film of bitumen, a synthetic resin, an adhesive, or a lacquer, at least over the predetermined breaking point and its immediate vicinity, to inhibit stress corrosion cracking which propagates under high mechanical stress and under the effect of the alkaline electrolyte, without reducing the intended bursting pressure.