Package making – Methods – Sterilizing complete package
Reexamination Certificate
2007-03-20
2007-03-20
Gerrity, Stephen F. (Department: 3721)
Package making
Methods
Sterilizing complete package
C053S432000, C053S469000, C053S471000, C426S393000, C426S401000, C426S407000, C426S412000
Reexamination Certificate
active
10518578
ABSTRACT:
Method for providing a heat treated filled and closed can, including the consecutive steps of: filling a metal cup, closing the metal cup with a lid making a gas tight heat treatable can, heat treating the can, wherein measures are taken to achieve an under-pressure in the can after closing the cup and wherein the can is chosen that is either of a flexible type on the one hand or of a rigid type with increased strength provided with a seal on lid on the other hand. The measures comprise a step belonging to the group of steps consisting of: using a partly frozen filling; having the filling include constituents that interact after closing so as to lower the specific volume of the filling in the can; adding steam to the cup after filling and before closing; closing the cup under sub-atmospheric pressure; and partly evacuating the can after closing.
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Corus Staal BV
Stevens Davis Miller & Mosher LLP
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