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:
Jan. 08, 1991
Filed:
Nov. 01, 1988
John McGrath, Castro Valley, CA (US);
Other;
Abstract
A one layer self-sealing, self-regulating, two-way flat valve for fluid containers, such as toy balloons and the like formed of two heat sealed film layers, is provided. The container having two container film layers joined at the perimeters thereof, an exterior opening in one of the layers, and a valve film layer attached to an inner surface of the same container layer. The valve film layer forms an integral fluid channel through which fluid is guided into the container from the exterior opening such that as the container attains maximum fluid capacity, the fluid channel automatically collapses. Perpendicular creases which form along the container surfaces cross the fluid channel to effectively seal the container.