US PATENT SUBCLASS 493 / 158
.~.~.~ Edge crimping or curling

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}
152  DF  .~.~ Nonrectangular cross section container {4}
158.~.~.~ Edge crimping or curling {1}
159  DF  .~.~.~.~> By relative rotation of work and tool about work axis

DEFINITION

Classification: 493/158

Edge crimping or curling:

(under subclass 152) Method or apparatus including turning under to conceal the unfinished edge of a sheet or web workpiece from a generally sharp edge to form a generally or rounded edge.

(1) Note. Crimping or curling the end of a cylinder by a tool acting on one part of the periphery is included herein even though, in theory, there may be thinning flow, to avoid splitting of similar art.

SEE OR SEARCH CLASS

264, Plastic and Nonmetallic Article Shaping or Treating: Processes, for a method of edge crimping or curling with stretching of material as in curling the end of a cylinder in a dip.

425, Plastic Article or Earthenware Shaping or Treating: Apparatus, for apparatus for edge crimping or curling with stretching of material as in curling the end of a cylinder in a die.