(under subclass 144) Apparatus having a cavity in which the material is compacted and means to change the position of the cavity from one location to another during the compacting operation.
(1) Note. This subclass includes presses in which a paddle wheel with radially sliding paddles is mounted to rotate within and in eccentric relation to a surrounding wall so that on a rotation of the wheel the paddles forward the material and the chamber defined by the wheel, paddles and surrounding wall diminishes in volume as the paddles are forced inwardly by the eccentric relation of wheel to wall.
