US PATENT SUBCLASS 493 / 257
.~.~.~.~ By roller having gripper engaging end edge of tube

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}
255  DF  .~.~.~ Tube opening and closing {3}
257.~.~.~.~ By roller having gripper engaging end edge of tube {1}
258  DF  .~.~.~.~.~> And having side fold gripper

DEFINITION

Classification: 493/257

By roller having gripper engaging end edge of tube:

(under subclass 255) Method or apparatus wherein manipulation of the flattened, cylindrical workpiece is effected by engagement of a peripheral cylindrical surface of a member turning more than 360 deg. about an axis and by a member mounted on the turning member serving to squeeze and thereby hold a leading or trailing portion of the workpiece against the peripheral surface of the turning member.