.~ Helix screwing through row of loops or openings {8}
92.9
.~.~ Helix rotator travelling axially
DEFINITION
Classification: 140/92.9
(under subclass 92.3) Apparatus characterized by the shifting of helix rotating means along a path substantially parallel to the cylindrical axis of a rotated helix during the intercoiling of the helix.
(1) Note. Included in this subclass are devices wherein shifting is effected solely by screwing action of a helix with respect to a row of loops or with respect to a fixed abutment in line with and in front of said row, the screwing action being imparted by positive rotation of a helix gripping chuck.
SEE OR SEARCH THIS CLASS, SUBCLASS:
92.8, for axially shifting of helix rotation means combined with loop row shifting means.
