US PATENT SUBCLASS 493 / 269
TUBE MAKING

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

269TUBE MAKING {15}
270  DF  .~> With printing or photographic reproduction
271  DF  .~> With minute size change of formed tube
272  DF  .~> With coating {4}
287  DF  .~> With cutting, breaking, tearing, or abrading {1}
291  DF  .~> With surface treatment (e.g., polishing, burnishing, etc.)
292  DF  .~> Tube including metal component
293  DF  .~> With extruding, drawing, or attenuating
294  DF  .~> With lining of tube
295  DF  .~> Polygonal cross section tube
296  DF  .~> Frustoconical tube
297  DF  .~> Assembling of distinct members {1}
299  DF  .~> Spiral winding {2}
302  DF  .~> With advancing of tube axially
303  DF  .~> Convolute winding {3}
308  DF  .~> Including closing end of tube

DEFINITION

Classification: 493/269

TUBE MAKING:

(under the class definition) Method or apparatus for forming a sheet or web workpiece into the shape of a hollow cylinder, wherein the cylinder may be circular, oval, or polygonal in cross section and may have one cross sectional dimension at one axial location and a different cross sectional dimension at another axial location.

(1) Note. The tube made by the method or apparatus of this subclass may be pressed down flat to virtually eliminate any interior space, if the purpose of the tube is to ultimately provide an open interior.

(2) Note. The tube made by the method or apparatus of this subclass is considered to be closed when considered in cross section, i.e., a sheet of material is folded to close back on itself and is fastened along abutting edges. Therefor, if a tubelike member is to be taped but not yet been taped, it is not yet a completed tube and the method or apparatus for making such an incomplete tube is not proper for placement in this subclass. See, for example, subclass 395. On the other hand, if a tube in intended to be used without securing the abutting edges, the method of apparatus for forming that tube will be found in this and the indented subclasses if the edges merely abutting face each other, since such a product is considered to be a complete tube.