.~.~ Including an axially adjustable helical surface formation
DEFINITION
Classification: 198/660
(under subclass 657) Apparatus wherein the conveyor section comprises one or more helical surface formations, at least one of which can be moved in a direction parallel to its axis of rotation.
(1) Note. Typical of the movement found here is the repositioning of a helical surface with respect to its housing, or of one helical surface with respect to another.
SEE OR SEARCH THIS CLASS, SUBCLASS:
629, for a conveyor section which moves a load by a plurality of different conveying actions (e.g., a helical surface which is rotated and, in addition, reciprocated).
659, for a flexible helical surface which has one portion which is movable relative to another portion (e.g., a helical surface which may be lengthened by stretching it).
