US PATENT SUBCLASS 229 / 185
.~.~ 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}
183  DF  .~ Bottom wall includes a folded extension of a sidewall {2}
185.~.~ Plural extensions mechanically interlocked with each other


DEFINITION

Classification: 229/185

Plural extensions mechanically interlocked with each other:

(under subclass 183) 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.

SEE OR SEARCH THIS CLASS, SUBCLASS:

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

155+, for similar subject matter forming a closure. [figure] [caption]mechanically interlocked extensions