Patent ID: 6105358
Filing Date: 2000-08-22
Classification: A44C,B21L

Abstract:
A jewelry rope chain having tightly interfitting links made of wire of a given cross-section, each link having a small gap formed therein, so as to enable one of said links to pass through the gap of a second link, said links being intertwined to fit substantially tightly one against the other and form in outward appearance a double helix, each link having a wire cross-section including a major axis defining a longer dimension and a minor axis defining a shorter dimension, the longer dimension being in the plane of the link and the shorter dimension being perpendicular thereto, said links having a caliber number associated therewith, said caliber number being selected from a group of caliber numbers including caliber numbers 14, 016, 018, 021, 022, 025, 030, 035 and 040, each of said links further having a ratio of said longer dimension to said shorter dimension associated therewith, said ratio being in the range of from greater than 1.2:1 to less than 1.3:1, the ratio of the longer dimension to said shorter dimension for different caliber numbers being as follows: Ratio of Longer Dimension to Caliber No. Shorter Dimension  14 1.22:1 16 1.24:1 18 1.22:1 21 1.20:1 23 1.22:1 25 1.20:1 35 1.21:1.