US PATENT SUBCLASS 229 / 126
.~.~ Foldable wall extension (e.g., closure flap)

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.~.~ Foldable wall extension (e.g., closure flap) {13}
127  DF  .~.~.~> Two opposed extensions have folded confronting flanges
128  DF  .~.~.~> Including means for biasing extension into closed position
129  DF  .~.~.~> Telescoping closure formed from plural extensions
129.1  DF  .~.~.~> Slide-operated closure flap
130  DF  .~.~.~> Including stop to limit opening movement of closure
131  DF  .~.~.~> Closed extension includes fixed and movable portions joined at a hinge line.
131.1  DF  .~.~.~> Access opening cut out of a foldable wall extension
132  DF  .~.~.~> Overlapping extensions bonded together {5}
138  DF  .~.~.~> Extensions of adjacent box walls hingedly attached together {2}
141  DF  .~.~.~> Extension includes a depending flange or tab which extends along an adjacent box wall {9}
155  DF  .~.~.~> Plural extensions mechanically interlocked with each other {2}
159  DF  .~.~.~> Extension formed of two or more thickness of box material
160  DF  .~.~.~> Access opening includes a rim for supporting a wall extension

DEFINITION

Classification: 229/126

Foldable wall extension (e.g., closure flap):

(under subclass 124) Subject matter wherein the closure comprises a unitary elongation of a wall, (i.e., of one-piece construction with the wall) which elongation is hingedly attached to the wall along a fold line. [figure] [caption]closure movable to pour spout position by unfolding only; no tearing involved

SEE OR SEARCH THIS CLASS, SUBCLASS:

125.34, for a box having foldable wall extensions which have a flexible sheet bonded to them.

125.37+, for a box having one or more foldable wall extensions which are maintained in position by a separate closure securing element. [figure] [caption]foldable wallextension