US PATENT SUBCLASS 72 / 139-- .~.~.~ Including non-cylindrical core

US PATENT SUBCLASS 72 / 139
.~.~.~ Including non-cylindrical core

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

127	DF	BY DEFLECTING SUCCESSIVELY-PRESENTED PORTIONS OF WORK DURING BODILY MOVEMENT THEREOF (E.G., FOR COILING, LEVELLING, CURVING OR TROUGHING MATERIAL IN MOVEMENT) {11}
135	DF	.~ To form helical coil or tube {7}
138	DF	.~.~ By use of means acting by and during machine operation to form coil of irregular pitch and/or diameter {1}
139		.~.~.~ Including non-cylindrical core

DEFINITION

Classification: 72/139

Including noncyclindrical core:

(under subclass 138) Subject matter wherein the coil-changing means includes an arbor that has a configuration other than that of a right circular cylinder.

(1) Note. Patents placed herein include those disclosing a mandrel having (for example) a conical shape or a noncircular cross section onto which the work is deflected, and from which the coil acquires its shape during deformation of the work into a coil.

(2) Note. For a discussion of "right circular cylinder", and examples of structure that is not a right circular cylinder, see (1) Note under the definition of subclass 102.