Methods for producing indicia on diamonds

Details Methods for producing indicia on diamonds Methods for producing indicia on diamonds

1991-10-08

1995-04-25

Paschall, Mark H.

Electric heating

Metal heating

By arc

21912168, 21912171, 21912173, B23K 2600, B23K 2606

Patent

active

054101255

ABSTRACT:
A method of producing a marking on diamond, pearl, precious or semi-precious stone. For producing the marking, the region on the surface to be marked is irradiated with an ArF excimer laser whose output beam is passed through a mask which defines the marking. Identification or security marks may be created. The same process can be used to produce strong and durable extrusion dies having irregular cross sections, and cross sections which vary with depth through the die material.

REFERENCES:
patent: 3114966 (1963-12-01), Fell
patent: 4248577 (1981-02-01), Bory et al.
patent: 4467172 (1984-08-01), Ehrenwald et al.
patent: 4534934 (1985-08-01), Cho
patent: 4703672 (1987-11-01), Ekkelboom
patent: 4842782 (1989-06-01), Portney et al.
patent: 4912268 (1990-03-01), Daniels et al.

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