US PATENT SUBCLASS 493 / 175
.~.~.~ By mandrel

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}
52  DF  .~ Rigid container (e.g., box, carton, cap, cup, etc.) {10}
162  DF  .~.~ Folding {7}
175.~.~.~ By mandrel {1}
176  DF  .~.~.~.~> And reciprocatory arm like tool

DEFINITION

Classification: 493/175

By mandrel:

(under subclass 162) Method or apparatus including use of a male forming member about which a sheet or web workpiece is wrapped by bending stress without thrust of the forming member.

(1) Note. A mandrel is similar in structure to a plunger, but is not intended to form work by force applied to the mandrel, rather is intended to serve as a reaction member onto which work is formed.