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:
May. 16, 2006
Filed:
Jul. 09, 2001
Hirozo Amano, Kasugai, JP;
Toru Abe, Chikushino, JP;
Keiichi Hayashi, Toyonaka, JP;
Hirotsugu Fukumori, Yokohama, JP;
Hirozo Amano, Kasugai, JP;
Toru Abe, Chikushino, JP;
Keiichi Hayashi, Toyonaka, JP;
Hirotsugu Fukumori, Yokohama, JP;
Japan Patent Management Co., Ltd., Tokyo, JP;
Abstract
The ease of opening of a tubular casing is facilitated based on a plastic film comprising three or more layers. The tubular sealed casing () for packaging the contents therein is based on a composite plastic film formed into a tubular form by bending the base film into a circular form, overlaying two edges of the bent base film, and heat-sealing the overlaid section so that a not heat-sealed section () will be left in an edge section of an upper film when the two edges thereof are overlaid on each other. The casing base film () is a composite plastic film comprising three or more layers. In this casing, the peel strength between the outer layer () and intermediate layer film () is set to a lower level as compared to the peel strength between the inner layer film () and intermediate layer film (). Because of this feature, disruption () of the outer layer film () from the intermediate film () occurs easily, when open the casing in the heat-sealed section (), and further the outer layer film () is peeled () from the intermediate film (), so that the casing can easily be opened.