US PATENT SUBCLASS 72 / 349
.~.~.~ Plural deep drawing

Current as of: June, 1999
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72 /   HD   METAL DEFORMING

343  DF  BY USE OF CLOSED-DIE AND COACTING WORK-FORCER (E.G., PUSH-DRAWING) {3}
347  DF  .~ Cup or shell drawing (i.e., deep drawing) {2}
348  DF  .~.~ With additional metal-deforming {1}
349.~.~.~ Plural deep drawing

DEFINITION

Classification: 72/349

Plural deep drawing:

(under subclass 348) Subject matter wherein the additional apparatus or method step itself would constitute subject matter for subclasses 347+.

(1) Note. A method comprising two or more steps of deep drawing, or apparatus for performing such steps, with or without additional metal deforming is proper subject matter for this subclass.