Special receptacle or package – Evacuated
Patent
1997-06-23
1999-04-20
Gehman, Bryon P.
Special receptacle or package
Evacuated
383100, 476113, 476118, B65D 8120, B65D 3301
Patent
active
058949291
ABSTRACT:
Disclosed is a sterilizing and vacuum packaging bag having at least one non-fused degassing portion, wherein an insufficiently fused area is present inside the degassing portion. The insufficiently fused area is lower in fusion strength than the vertical fused areas and a bag mouth fused area, and is fused so as to be separable by an increase in inner pressure. Further disclosed is a vacuum packaging method comprising using this sterilizing and vacuum packaging bag, including putting contents into the bag through an open end thereof, fusing the open end more firmly than the insufficiently fused area, performing microwave heating, separating films fused together at the insufficiently fused area at a stage that the surface temperature of the contents is also sufficiently elevated, and completely fusing the degassing portion after termination of microwave heating. As a result, in the vacuum packaging technique utilizing microwave heating, the surface temperature of the contents can be prevented from being lowered to obtain a good sterilized state. Further, even when the contents contain fluid water, leakage of water can be prevented during vacuum packaging.
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Kai Hisao
Umezawa Kazumi
Gehman Bryon P.
Yugenkaisha Kusaka Raremetal Kenkyusho
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