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Class Information
Number: 72/136
Name: Metal deforming > By deflecting successively-presented portions of work during bodily movement thereof (e.g., for coiling, levelling, curving or troughing material in movement) > To form helical coil or tube > Including thinning of helical portion of work section
Description: Subject matter wherein the instrumentality comprises two elements: (a) having work-engaging surfaces extending transversely across the direction of movement of the work, and (b) engaging opposite faces of the work, and in which as claimed or disclosed, the distance between the work-engaging surfaces is less at one side margin of the work than at the other side margin thereof, and also less than the original work thickness.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 6601299 |
Tapered fin and method of forming the same |
Aug. 5, 2003 |
| 6443040 |
Process for manufacturing screws and a device for actuating the process |
Sep. 3, 2002 |
| 6313395 |
Interconnect structure for solar cells and method of making same |
Nov. 6, 2001 |
| 6308549 |
Apparatus and method for forming spirally wound stator core or rotary electric machine |
Oct. 30, 2001 |
| 6141860 |
Method for manufacturing coil |
Nov. 7, 2000 |
| 5823035 |
Method of making a coil spring |
Oct. 20, 1998 |
| 5678440 |
Screw conveyors, augers and flighting for use therein |
Oct. 21, 1997 |
| 4884425 |
Roll forming apparatus for forming barbed tape into a coded configuration |
Dec. 5, 1989 |
| 4833904 |
Process for making barbed tape |
May. 30, 1989 |
| 4813126 |
Apparatus and method for fabricating magnetic devices |
Mar. 21, 1989 |
| 4784373 |
Barbed tape |
Nov. 15, 1988 |
| 4531271 |
Method for manufacturing a rotationally symmetrical construction part |
Jul. 30, 1985 |
| 4445353 |
Apparatus for manufacturing helical cores |
May. 1, 1984 |
| 4429558 |
Method of and apparatus for fabrication of spiral fin |
Feb. 7, 1984 |
| 4193281 |
Device for manufacturing coiled magnetic cores for electrical machines |
Mar. 18, 1980 |
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