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:
Apr. 17, 2012
Filed:
Nov. 06, 2007
Edwin C. Culbertson, Taylors, SC (US);
Kenneth J. Muschelewicz, Easley, SC (US);
Edwin C. Culbertson, Taylors, SC (US);
Kenneth J. Muschelewicz, Easley, SC (US);
Mitsubishi Polyester Film, Inc., Greenville, SC (US);
Abstract
A tamper evident composite film is disclosed. The composite film contains a first film layer made from polyester adjacent to a second film layer made from a polyolefin, such as a low density polyethylene. If desired, the composite film can further include a third film layer positioned on the opposite side of the second film layer. The composite film is produced through a coextrusion process. In one embodiment, the composite film can be biaxially stretched prior to use. The composite film is constructed so that the first film layer will delaminate from the second film layer when the composite film is tampered with or otherwise mishandled.