US PATENT SUBCLASS 229 / 122.3
.~.~ The bottom wall includes upwardly extending flanges which overlap the side walls on the outside of the box


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229 /   HD   ENVELOPES, WRAPPERS, AND PAPERBOARD BOXES

100  DF  PAPERBOARD BOX {54}
122.27  DD  .~ Rectangular box having a bottom wall initially separate from all of the side walls {4}
122.3.~.~ The bottom wall includes upwardly extending flanges which overlap the side walls on the outside of the box