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1. (WO2018078380) APPARATUS AND METHOD FOR APPLYING A COATING TO GEMSTONES

Pub. No.:    WO/2018/078380    International Application No.:    PCT/GB2017/053240
Publication Date: Fri May 04 01:59:59 CEST 2018 International Filing Date: Sat Oct 28 01:59:59 CEST 2017
IPC: G03F 7/16
B05B 13/02
B05C 13/02
B44B 3/06
H01L 21/67
Applicants: DE BEERS UK LIMITED
Inventors: ROSE, Peter Stanley
HARRIES, Trevor Anthony
EVANS, David James Francis
DAWS, Christopher
Title: APPARATUS AND METHOD FOR APPLYING A COATING TO GEMSTONES
Abstract:
An apparatus for applying a coating to gemstones comprises a chuck configured to retain a plurality of gemstones laterally displaced from and disposed around a rotation axis and a dispense aperture configured to dispense a quantity of liquid onto a facet of each gemstone. A motor is configured to selectively spin the chuck about the rotation axis so that the gemstones orbit the rotation axis, such that the dispensed liquid forms a coating on the facet of each gemstone. A method of applying a coating to gemstones is also provided.