US PATENT SUBCLASS 383 / 44
.~.~ Responsive to content (e.g., valve)

Current as of: June, 1999
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383 /   HD   FLEXIBLE BAGS

42  DF  WITH CLOSURE {16}
43  DF  .~ Self-closing type {1}
44.~.~ Responsive to content (e.g., valve) {8}
45  DF  .~.~.~> With vent
46  DF  .~.~.~> With closure reinforcing or stiffening means
47  DF  .~.~.~> With means to facilitate opening closure
48  DF  .~.~.~> With supplemental closing feature {4}
53  DF  .~.~.~> In distinct end wall {1}
55  DF  .~.~.~> Folded bag corner {1}
57  DF  .~.~.~> Closure includes inwardly folded bag wall portions
58  DF  .~.~.~> Overlying access opening in bag material

DEFINITION

Classification: 383/44

Responsive to content (e.g., valve):

(under subclass 43) Subject matter wherein the weight or pressure of the content forces the closure into its closed configuration.

(1) Note. A claimed bag closure which inherently closed by

the content (i.e., valve bag) is classified in this and indented subclasses.