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. 21, 1981
Filed:
Aug. 31, 1979
Werner Riedl, Ellwangen, DE;
Varta Batterie Aktiengesellschaft, Hanover, DE;
Abstract
A galvanic element of buttom cell configuration is provided, in addition to the usual seal of thermoplastic material between cell terminal and cell cup, with an additional seal. This fills the annular gap which is created when a contact cap surrounding the galvanic element is attached to the cell terminal. The second seal is made, for example, by casting of bitumen or casting resin into the annular gap, shaking in of synthetic plastic powder and subsequent heat treatment for attachment, or by displacement of a heat sensitive glue from the contact cap in response to pressing into the cell. Also, pre-fabricated ceramic rings with metalized surfaces, which are soldered in place betweeen cell cup and contact cap, may be used as the second seal.