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:
Mar. 03, 1992
Filed:
Jan. 17, 1990
Yukio Takata, Sodegaura, JP;
Takeshi Shinohara, Sodegaura, JP;
Idemitsu Petrochemical Co., Ltd., Tokyo, JP;
Abstract
A multilayer container having a flange portion and an easily-openable packaging container packaged by using the multilayer container, wherein the interlaminar strength of the multilayer container is smaller than the peeling strength between the flange portion and the lid member, and a ring notch is provided to an inner surface layer of the flange portion inside a heat seal portion. The packaging container has both of a good sealing property and an easy openability and has an excellent resistance to boiling and a retort treatment, and the peeled surface has a good appearance. A method for producing the multilayer container and a method for producing the packaging container, and an apparatus to be used for producing the multilayer container, and a method for filling and packaging, and an apparatus for filling and packaging are disclosed.