US PATENT SUBCLASS 493 / 419
.~.~.~ Folding by buckling

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

395  DF  BENDING {6}
405  DF  .~ Folding {13}
416  DF  .~.~ With means to advance work or product {8}
419.~.~.~ Folding by buckling {1}
420  DF  .~.~.~.~> Buckle chute folding {1}

DEFINITION

Classification: 493/419

Folding by buckling:

(under subclass 416) Method or apparatus comprising application of compressive stress to the workpiece parallel to planar surfaces thereof to cause the workpiece to yield in columnar failure.

SEE OR SEARCH THIS CLASS, SUBCLASS:

249, for making a pliable container including folding by buckling.