US PATENT SUBCLASS 493 / 940
BELLOWS

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

940BELLOWS

DEFINITION

Classification: 493/940

BELLOWS:

Operation involving the construction of a three-dimensional member including an interior chamber and side walls that are zigzag folded to allow the volume of the interior chamber to change.