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:
Jul. 03, 2007
Filed:
Sep. 22, 2003
Masataka Yamamoto, Tokyo, JP;
Takeo Omori, Ibaraki, JP;
Masataka Yamamoto, Tokyo, JP;
Takeo Omori, Ibaraki, JP;
Kureha Chemical Industry Company, Limited, Tokyo, JP;
Abstract
Deep draw packaging includes placing an object (C) in a concave container portion () formed by molding a film with small shrinkability (A), that is a film having a residual thermal shrinkage rate at 100° C. of 1 to 15 %. The film (A) is formed by stretching a film having deep draw moldability and then thermally relaxing the film. The film has a surface which is formed of a heat sealable material which becomes the inner wall of the container portion. The concave container portion () is thereafter transferred to to a vacuum packaging apparatus () where it is covered by a cover portion () formed of a film (B) which can be heat welded to the film (A). A side face portion () and a bottom face portion () of the concave container portion () are thermally shrunk into close contact with the object (C). Less curling is exhibited when an upper peripheral portion () of the concave container portion () is sealed with the film (B).