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. 22, 1992
Filed:
Oct. 22, 1990
Jay W Lyon, Greensburg, PA (US);
Aluminum Company of America, Pittsburgh, PA (US);
Abstract
A cap for substantially gas-tight sealing engagement with a container wall having an opening therein circumscribed by a sealing surface has an end wall and a depending skirt with a portion for securing the cap to a container wall, and a tab for manual engagement to rotate the cap between a container wall sealing surface engaging position and a storage position. The cap has a vent region provided by a weakened zone that is preferably located on or near the tab. The weakened area may include removal of a portion of the cap skirt, thinning a portion of the cap skirt, variations in wall thickness of portions of the cap skirt or top wall in a predetermined manner, configurating the portion of the tab which connects with the cap in such a manner as to facilitate ready circumferential expansion of the cap. Combinations of these weakening features may be employed. The cap is adapted once in gas-tight sealing engagement with the sealing surface of the container wall to vent in the weakened zone upon predetermined internal container, pressure being attained and, subsequently, automatically resealed. A container in combination with such a cap is also disclosed.