US PATENT SUBCLASS 220 / 688
.~.~.~.~ Exterior strip and interior strip secured together by transverse connector:

Current as of: June, 1999
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220 /   HD   RECEPTACLES

660  DF  SIDEWALL STRUCTURE {7}
677  DF  .~ Sidewall seam or joint {4}
682  DF  .~.~ Interlocked joint {4}
683  DF  .~.~.~ Separate strip-like element {4}
688.~.~.~.~ Exterior strip and interior strip secured together by transverse connector:

DEFINITION

Classification: 220/688

Exterior strip and interior strip secured together by transverse connector:

(under subclass 683) Receptacle wherein a strip is provided on the outside of a sidewall joint and an additional strip is provided on the inside of the joint substantially coextensive with the outer strip, and the strips are connected by a means which extends transversely between the strips thereby clamping the edge portions of the sidewall between the strips.