US PATENT SUBCLASS 493 / 313
.~ By direct application of vacuum or fluid pressure

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


493 /   HD   MANUFACTURING CONTAINER OR TUBE FROM PAPER; OR OTHER MANUFACTURING FROM A SHEET OR WEB

309  DF  CONTAINER OR TUBE ERECTING, OPENING, OR COLLAPSING {5}
313.~ By direct application of vacuum or fluid pressure {3}
314  DF  .~.~> Internal fluid pressure to erect container or tube
315  DF  .~.~> Orbital movement of work contacting vacuum applying means
316  DF  .~.~> Oscillating movement of work contacting vacuum means {1}

DEFINITION

Classification: 493/313

By direct application of vacuum or fluid pressure:

(under subclass 309) Method or apparatus wherein repositioning of one wall with respect to another is effected by (a) removing atmospheric pressure from one side of an area of the wall so that atmospheric pressure on the opposite side causes the wall to move; or, (b) by direct application of superatmospheric pressure to one side of an area of the wall to cause the wall to move.