US PATENT SUBCLASS 493 / 271
.~ With minute size change of formed tube


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

269  DF  TUBE MAKING {15}
271.~ With minute size change of formed tube


DEFINITION

Classification: 493/271

With minute size change of formed tube:

(under subclass 269) Method or apparatus comprising changing, very slightly, a dimension of the formed hollow cylinder.

(1) Note. The operation of this subclass normally involves mere modification of a surface of the tube without significant thinning flow or removal or a portion of the work.

SEE OR SEARCH THIS CLASS, SUBCLASS:

287+, for making a tube and shaving that tube to size.

293, for making a tube combined with causing a thinning flow of the material, to change the dimensions of the cylindrical member.

SEE OR SEARCH CLASS

264, Plastic and Nonmetallic Article Shaping or Treating: Processes, for a method of reducing the size of a tube including thinning (or thickening) flow of the material.

425, Plastic Article or Earthenware Shaping or Treating: Apparatus, for apparatus for reducing the size of a tube including thinning (or thickening) flow of the material.