US PATENT SUBCLASS 229 / 155
.~.~.~ Plural extensions mechanically interlocked with each other

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}
155.~.~.~ Plural extensions mechanically interlocked with each other {2}
156  DF  .~.~.~.~> One extension interlocks with at least two others {1}
158  DF  .~.~.~.~> One extension projects through two separate openings in another extension

DEFINITION

Classification: 229/155

Plural extensions mechanically interlocked with each other:

(under subclass 126) Subject matter wherein two or more extensions are physically interconnected in such a manner that movement of each extension is constrained by at least one of the others, even in the absence of a bond or separate fastener.

SEE OR SEARCH THIS CLASS, SUBCLASS:

117, for interlocking bottom flaps which automatically form a bottom wall during erection of collapsed box.

132+, for extensions which are bonded together.

139, for an extension which extends into a pocket formed by three others.

185, for similar subject matter comprising a box bottom wall. [figure] [caption]plural extensions