Lap for the polishing of gemstones

Details Lap for the polishing of gemstones Lap for the polishing of gemstones

1983-05-23

1984-11-27

Schmidt, Frederick R.

Abrasive tool making process, material, or composition

Impregnating or coating an abrasive tool

51322, 51356, 51209DL, 51266, B24B 100, B24B 5502, B24D 710

Patent

active

044844182

ABSTRACT:
There is provided a scaife for the polishing of gemstones wherein the abrasive material is embedded in a matrix of a material maintained in the solid state, which material has a high enthalpy of phase transition from solid to liquid. Suitable materials are frozen water, frozen water/organic liquid mixtures such as water/alkanol mixtures and suitable metals or metal alloys. There is also provided a process for the polishing of gemstones which comprises establishing a layer of abrasive embedded in a suitable solid matrix in or on the surface of a rotatory plate and polishing the gemstones, overheating being prevented by the high enthalpy of solid/liquid transition of the said matrix.

REFERENCES:
patent: 193306 (1877-07-01), White
patent: 1213164 (1917-01-01), DeGraaf
patent: 2419739 (1947-04-01), Spina
patent: 2429961 (1947-10-01), Rakowitzky
patent: 2635399 (1953-04-01), West, Jr.
patent: 2641879 (1953-06-01), Dalrymple
patent: 3745722 (1973-07-01), Balz
Method of Obtaining a Chip-Free Edge on Sapphire, C. D. Abbott, IBM Technical Disclosure Bulletin, vol. 21, No. 4, Sep. 1978.

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