US PATENT SUBCLASS 493 / 252
.~.~.~.~ Mandrel having rectangular surface

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}
186  DF  .~ Pliable container (e.g., bag, envelope, etc.) {9}
243  DF  .~.~ Including folding {8}
250  DF  .~.~.~ By mandrel or plunger {3}
252.~.~.~.~ Mandrel having rectangular surface

DEFINITION

Classification: 493/252

Mandrel having rectangular surface:

(under subclass 250) Method or apparatus wherein a male forming member about which the sheet or web workpiece is wrapped without thrust includes a work shaping surface that is generally planar and is bounded by four sides meeting at right angles.

SEE OR SEARCH CLASS

53, Package Making,

558+, for a machine to open a preformed but collapsed bag and subsequently fill the bag; subclasses 563+, for a machine to form a package about a hollow mandrel; subclasses 220+ for a machine which packages an article by moving the article and the wrapper through a cover wiping passage or pocket to form the initial folds of the wrap; and subclass 384.1 for apparatus for opening a preformed but collapsed bag.