US PATENT SUBCLASS 229 / 133
.~.~.~.~ Including a sealing web formed by partial delamination of a wall extension

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}
132  DF  .~.~.~ Overlapping extensions bonded together {5}
133.~.~.~.~ Including a sealing web formed by partial delamination of a wall extension

DEFINITION

Classification: 229/133

Including a sealing web formed by partial delamination of a wall extension:

(under subclass 132) Subject matter wherein the closure includes a lamina of box material which has been partially torn from a wall extension, formerly part of its thickness, and which aids in the prevention of leakage along at least part of the perimeter of the across opening.

(1) Note. An indentation may be a point, a line or an area. [figure] [caption]extensions