US PATENT SUBCLASS 229 / 128
.~.~.~ Including means for biasing extension into closed position

Current as of: June, 1999
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229 /   HD   ENVELOPES, WRAPPERS, AND PAPERBOARD BOXES

100  DF  PAPERBOARD BOX {54}
124  DF  .~ With closure for an access opening {7}
126  DF  .~.~ Foldable wall extension (e.g., closure flap) {13}
128.~.~.~ Including means for biasing extension into closed position

DEFINITION

Classification: 229/128

Including means for biasing extension into closed position:

(under subclass 126) Subject matter wherein the box includes means which tend to force the extension to move toward, or to remain, in its closed condition.

SEE OR SEARCH THIS CLASS, SUBCLASS:

125.02, for a separate closure having means to bias it into

its closed position. [figure]