US PATENT SUBCLASS 229 / 131
.~.~.~ Closed extension includes fixed and movable portions joined at a hinge line.

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}
131.~.~.~ Closed extension includes fixed and movable portions joined at a hinge line.

DEFINITION

Classification: 229/131

Closed extension includes fixed and movable portions joined at a hinge line:

(under subclass 126) Subject matter wherein the extension, in closed condition, includes a first part which remains immobilized with respect to the box wall to which it is attached and a second part, which is pivotally attached to the first part along a fold line. [figure]