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. 19, 1988
Filed:
Sep. 30, 1986
Ernest V Canamero, Durand, IL (US);
E. I. Du Pont de Nemours and Company, Wilmington, DE (US);
Abstract
Enclosed package such as an envelope-like package, which may be substantially impermeable to gas, water and chemical vapor and preferably is essentially light opaque having two surfaces sealed together, e.g., at least one end, and having a tearstrip. The improvement comprises hot melt adhesive-covered tearstrip present between the two surfaces and is sealed in an area along the entire length of the outer edge of the tearstrip, the inner edge of the entire length of the tearstrip remaining unsealed except at the opposite ends. The seal can be opened easily by tearing in a substantially perfect line with virtually no ragged edges which impede the removal of the package contents. The package, when light opaque, is useful for containing light-sensitive photographic films, e.g., x-ray films, including x-ray intensifying screens, photopolymer elements and other light sensitive sheets. In nonlight opaque embodiments, the package can contain paper sheets, flat materials and various solid and liquid food items.