(under subclass 269) Method or apparatus comprising coiling a generally planar, elongated sheet or web workpiece about an imaginary axis while continuously moving the supply of work axially with respect to the formed hollow cylinder so that adjacent convolutions are axially offset from each other.
SEE OR SEARCH CLASS
242, Winding, Tensioning, or Guiding, particularly
430+, and 470+ for helical winding on an article core or
