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:
Aug. 08, 1995
Filed:
Mar. 31, 1994
Michael P Gorlich, Hilton Head Island, SC (US);
World Class Packaging Systems, Inc., Hilton Head Island, SC (US);
Abstract
A tray having a peripheral flange with one or more raised ledges to secure a pair of membranes to enclose the tray. A lower membrane may be attached to a first ledge of the flange. An upper membrane may be attached to a second ledge or a recessed lip of the flange without connection to the lower membrane, except through the tray. The two attachment surfaces may be separated by a trough or by being positioned on different levels to facilitate trimming of the upper membrane in a continuous manufacturing process. In one embodiment, each membrane may bear one or more selected labels. The upper membrane may, for example, bear a label intended for a retail operator, while the lower membrane bears a label designed for an ultimate purchaser of the packaged product. In another embodiment, the lower membrane has a higher permeability, and the upper membrane has a lower permeability. In this embodiment, a desired gaseous environment may be maintained within the package. When it is desired to change the gaseous environment, the upper (less permeable) membrane may be peeled away allowing gaseous communication through the lower (more permeable) membrane.