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:
Dec. 29, 2009
Filed:
May. 20, 2005
Karl K. Hoffman, Arlington Heights, IL (US);
Karl K. Hoffman, Arlington Heights, IL (US);
Plitek, L.L.C., Des Plaines, IL (US);
Abstract
The present invention creates a new rigid degassing valve. The valve of the present invention utilizes a relatively stiff support body in order to successfully vent gases, such as carbon dioxide, from within the packaging. Carbon dioxide may be created by organic products placed in the packaging which causes the package to expand. The valve of the current invention maintains its shape as the package becomes bloated and takes on a rounded shape due to carbon dioxide expended by the roasted coffee beans. The invention pertains to a pressure relief valve for use on packaging containers comprising a stiff support body mountable to a package surface defining an inner aperture wherein the stiff support body has a stiffness of between 300 grams and 800 grams; a flexible film having a top and bottom surface mounted to said stiff base and moveable between an open and closed position; a rail mounted on said stiff base permitting the flexible film to move between an open and closed position; in said open position said film is located above said aperture; in said closed position, said film covers said aperture; and wherein the stiff support body does not conform with any curvature of the packaging surface such that the flexible film may move between an open and closed position regardless of the curvature of the packaging surface.