(under subclass 274) Subject matter which functions to form a relatively rigid elongated product* having at least one of the following characteristics: (a) the central longitudinal axis of the product does not constitute a straight line; or (b) at two spaced points along the central longitudinal axis, the transverse cross sections of the product (whether solid or hollow) are not identical in one of the following respects: (i) size, (ii) shape, (iii) wall thickness, or (iv) orientation about the centerline.
(1) Note. Many products are either (a) intentionally left "pitted", "scored", etc., for purposes such as esthetics effect or lubrication, or (b) intentionally, or unintentionally, partially deformed (usually at the leading end) when they are gripped, pulled, or otherwise handled. If such deformations are claimed, then placement herein is proper, even though such deformation will later become "waste" if placement is otherwise appropriate for subclasses 274+. If, however, such deformation is unintentional, and/or disclosed but not claimed, then such patents will be found in subclasses further indented under subclass 274.
(2) Note. In the figures below, the tubular workpiece illustrates items (ii), (iii), and (iv) under part (B) of the definition of this subclass. [figure] [figure] [caption]Drawing a nonuniform product, (e.g., from pre-twisted eccentric tubbing) (subclass 276)
SEE OR SEARCH THIS CLASS, SUBCLASS:
59, for a method of or means for corrugating tubular work utilizing fluent material as a "tool".
136, for deflecting to form a helical coil or tube including the thinning of a portion of the work.
240, for varying the bite of a roller couple during deformation. 260, for method or means for forming a non-uniform product by extruding.
318, for die-forging the end of indeterminate length work.
