Manufacture of a jewelry ring having inner lips at edges thereof

Details Manufacture of a jewelry ring having inner lips at edges thereof Manufacture of a jewelry ring having inner lips at edges thereof

1998-05-15

2000-02-22

Echols, P. W.

Metal working

Method of mechanical manufacture

Jewelry or locket making

29896411, 72105, 63 15, A44C 2700

Patent

active

060265728

ABSTRACT:
A ring is formed by first inverting a washer comprising a substantially planar annular member with an outer circumference and a central opening defining an inner circumference, an inner lip extending from one side of the annular member at the inner circumference, an outer lip extending from the same side of the annular member at the outer circumference, and an intermediate section between the first and second lips that reduces in thickness from the inner lip to the outer lip, into a frusto-conical shape; then second inverting the frusto-conical shaped washer into a cylindrical element; and then cold working the cylindrical element by a cold rolling operation so that the annular member assumes an arcuate cross-sectional configuration of substantially constant thickness, whereby to increase a crushing strength of the ring due to the cold rolling and cold working of the cylindrical element and the lips.

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Brochure, All Form Tubing, Inc., Newark, New Jersey.
Brochure, "Machines and Tools for Gold and Silversmiths," FOV, Vicenza, Italy.
Brochure, "Calandra Tonda, " Macchine Ed Attrezzature Orafe, Arrezo, Italy.

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