US PATENT SUBCLASS 493 / 439
.~.~.~.~.~ Folding indeterminate length work

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}
436  DF  .~.~.~ Continuous advance past folder {2}
438  DF  .~.~.~.~ Folding by passive reaction member {1}
439.~.~.~.~.~ Folding indeterminate length work {1}
440  DF  .~.~.~.~.~.~> Plural folding actions

DEFINITION

Classification: 493/439

Folding indeterminate length work:

(under subclass 438) Method or apparatus wherein at the time the crease line is formed the workpiece is a web of such length that no more than one end thereof is recognized (engaged).

(1) Note. A spool or coil of work is considered to be "indeterminate length".