Abstract: A cylindrical-bodied yarn package wound on a bobbin in layers of helical coils which appear in a repeating program having stable curved reversals separated circumferentially by a finite distance, substantially all the crossings occurring in the curved reversals intersect at angles greater than the angles at yarn crossings occurring in the helical portions of the yarn path. The yarn paths involve at least three cycles in which yarn is wound in a program at a constant helix angle between reversals but a plurality of helix angles are included in the program.

Abstract: A yarn windup for generally cylindrical packages employing dual mode traverse that includes a first traverse device in the form of a reciprocable thread guide and a second traverse device in the form of a grooved roll to take over the traverse stroke near the ends of the traverse stroke of the reciprocating thread guide. The grooved roll is synchronously driven with the reciprocating traverse guide and the unique groove configuration coupled with appropriate yarn laydown on the grooved roller improves package formation.