(under subclass 145) Apparatus in which the walls of the constricted passage are held in place by a limited but continuing force so that the size of the constriction may vary with the amount of material forced therethrough.
SEE OR SEARCH THIS CLASS, SUBCLASS:
169, for roller type concurrent pressing and conveying presses in which the rolls are yieldable so as to separate.
192, for plunger type concurrent pressing and conveying presses having an adjustable choke with features to permit overload relieving.
