(under subclass 253.1) Apparatus comprising a reciprocatable plunger or equivalent structure for applying extrusion pressure directly on work located and confined within the container, or a detail or element of such structure (e.g., a dummy block).
(1) Note. Because of the peculiar nature of extrusion, extrusion rams, and elements thereof are classified here. For metal-deforming tools generally, including plunger means otherwise usable, see subclasses 462+.
SEE OR SEARCH CLASS
100, Presses,
214+, for a reciprocating press construction; and subclasses 295+ as the residual locus for pressure surface elements.
