US PATENT SUBCLASS 53 / 434
.~.~.~ Flexible preform cover (e.g., bags, pouches)

Current as of: June, 1999
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53 /   HD   PACKAGE MAKING

396  DF  METHODS {22}
428  DF  .~ With contents treating {7}
432  DF  .~.~ Vacuum or gas treating {2}
434.~.~.~ Flexible preform cover (e.g., bags, pouches)

DEFINITION

Classification: 53/434

Flexible preform cover (e.g., bags, pouches):

(under subclass 432) Methods in which the cover comprises a prefabricated baglike receptacle.

SEE OR SEARCH THIS CLASS, SUBCLASS:

459, for methods for opening and filling bags.

469, for methods for filling and closing bags.

512, for apparatus for treating with vacuum or inert gaseous atmosphere wherein cover is a bag.