Package making – Methods – With contents treating
Reexamination Certificate
2007-07-03
2007-07-03
Gerrity, Stephen F. (Department: 3721)
Package making
Methods
With contents treating
C053S442000, C053S453000, C053S511000, C053S557000, C053S561000, C053S478000, C053S329300
Reexamination Certificate
active
10529236
ABSTRACT:
Deep draw packaging includes placing an object (C) in a concave container portion (1) 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 (1) is thereafter transferred to to a vacuum packaging apparatus (5) where it is covered by a cover portion (2) formed of a film (B) which can be heat welded to the film (A). A side face portion (11) and a bottom face portion (12) of the concave container portion (1) are thermally shrunk into close contact with the object (C). Less curling is exhibited when an upper peripheral portion (13) of the concave container portion (1) is sealed with the film (B).
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Omori Takeo
Yamamoto Masataka
Gerrity Stephen F.
Kureha Chemical Industry Company Limited
Nixon & Vanderhye PC
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