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:
Jun. 07, 1977
Filed:
Mar. 31, 1976
Robert B De Ment, Steger, IL (US);
William D Simms, Chicago, IL (US);
Kastalon Inc., Alsip, IL (US);
Abstract
An improved, long lasting sealing ring for closing the open end of a can while vacuum is applied thereto to test for porosity. The ring comprises an outer pad of soft elastomer material made preferably of polyeurathane of relatively low durometer and having an internal cavity with a peripheral groove into which is fitted a mounting assembly comprising an annular steel or metal adapter plate encased within a relatively hard durometer elastomer, preferably polyeurathane, disk which has a novel sharp-edged peripheral configuration which functions to embed into an inturned flange on the pad and thus effectively seals the disk with the pad.