US PATENT SUBCLASS 493 / 167
.~.~.~ By plunger

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}
167.~.~.~ By plunger {6}
168  DF  .~.~.~.~> Forming hollow wall or 270 degree folded edge
169  DF  .~.~.~.~> Plural interrelated plungers (e.g., making separate cover and container)
170  DF  .~.~.~.~> Flowable plunger or reaction member
171  DF  .~.~.~.~> Expandable or contractable plunger or reaction member
172  DF  .~.~.~.~> Orbitally moving plunger or reaction member {1}
174  DF  .~.~.~.~> And reciprocatory reaction member

DEFINITION

Classification: 493/167

By plunger:

(under subclass 162) Method or apparatus including use of a male forming member on which a sheet or web workpiece is wrapped by bending stress as a result of thrust of that member.

(1) Note. A bladelike member including an elongated folding edge may be considered to be a plunger or male forming member

for this subclass.