US PATENT SUBCLASS 493 / 137
.~.~.~.~ Interlocking tab and slot

Current as of: June, 1999
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493 /   HD   MANUFACTURING CONTAINER OR TUBE FROM PAPER; OR OTHER MANUFACTURING FROM A SHEET OR WEB

51  DF  CONTAINER MAKING {2}
52  DF  .~ Rigid container (e.g., box, carton, cap, cup, etc.) {10}
121  DF  .~.~ Securing {6}
136  DF  .~.~.~ By interfitting of container portions {2}
137.~.~.~.~ Interlocking tab and slot {2}
138  DF  .~.~.~.~.~> Including integral internal partition
139  DF  .~.~.~.~.~> Integral interlocking closure

DEFINITION

Classification: 493/137

Interlocking tab and slot:

(under subclass 136) Method or apparatus wherein the workpiece is provided with an elongated opening and is provided with a protuberance to interfit therewith including the operation of bringing about such interfitting of the receptacle portions.