US PATENT SUBCLASS 229 / 194
.~.~.~ And are 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}
190  DF  .~ A sidewall includes a folded lateral extension of an adjacent sidewall (e.g., "corner flap") {5}
193  DF  .~.~ Folded extensions of opposed sidewalls overlap one another {1}
194.~.~.~ And are mechanically interlocked with each other

DEFINITION

Classification: 229/194

And are mechanically interlocked with each other:

(under subclass 193) Subject matter wherein the overlapped extensions are physically interconnected in such a manner that movement of each extension is constrained by the other even in the absence of a bond or separate fastener.

SEE OR SEARCH THIS CLASS, SUBCLASS:

155, for mechanically interlocked closure flaps. [figure] [caption]overlapping extensions