(under subclass 253.1) Method or means for effecting a metal-deforming operation of a type other than and in addition to an extrusion operation.
(1) Note. Forging to a particular shape, whether intentional or not, as the result of incomplete extrusion, is considered to be part of the extrusion process and not another metal-deforming operation. Leaving unexpressed in the extrusion chamber a compacted residue having the shape of the occupied portion of the chamber (even when for the purpose of heading or bottoming extrusion product, for instance) is not a separate forging operation, and consequently is not considered proper subject matter for this subclass.
(2) Note. Search this class, any appropriate area above, e.g., subclasses 68, 130, or 206, for the metal shaping operation provided for there, combined with extrusion.
SEE OR SEARCH THIS CLASS, SUBCLASS:
254+, for billet piercing accomplished or accompanied by cutting, as by punching out a slug.
264+, for billet piercing accomplished by an extrusion mandrel as part of or in connection with extrusion.
