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:
Feb. 21, 1989
Filed:
May. 29, 1987
Leslie L Martin, Jr, Saginaw, MN (US);
Potlatch Corporation, San Francisco, CA (US);
Abstract
A laminated web is composed of a paper substrate having a layer of oriented polyethylene terephthalate film bonded to one surface and a layer of polyolefinic resin covering its second surface. The film presents an exposed surface having the known property of being heat sealable to itself, but is not heat sealable to polyolefinic resins. The web can be used successfully in the production of end products, such as containers, that include seams produced by employing flame heat sealing techniques. Flame activation of the sealed surfaces permits heat sealing of opposite surfaces of the web to one another without use of an adhesive. Containers produced by the use of this laminate evidence high retention of volatile materials and flavor oils commonly lost during storage of food products within containers made from paper laminates.