Electric heating – Metal heating – By arc
Patent
1989-05-12
1991-01-22
Albritton, C. L.
Electric heating
Metal heating
By arc
36447408, 428 40, B23K 2600
Patent
active
049872877
ABSTRACT:
A laser beam cuts a thin stencil template from a label. The label includes a layer or facestock of polyester which can withstand a harsh environment, and a protective topcoat of a polyester resin and a silicone particulate. The label has a releasable adhesive applied to its lower surface, the adhesive being covered with a backing strip which is coated to facilitate separation from the adhesive. The laser light beam is moved so the label and any exterior coating that may be on it is "cut" or vaporized to form a pattern. The laser light beam also removes the adhesive material in its path, while leaving the backing strip intact. Use of the stencil includes: removing the backing strip from the label; applying the label to a surface to be etched with the releasable adhesive holding the label where positioned; applying etching compound to the surface to be etched through the stencil; allowing the etching compound to set in the glass for a desired period of time; and removing the stencil; and wiping off any excess etching compound.
REFERENCES:
patent: 4323752 (1982-04-01), Okag et al.
patent: 4530061 (1985-07-01), Henderson
patent: 4549063 (1985-10-01), Ang et al.
"Lift-Off Stencil Created by Laser Aldation", IBM Technical Disclosure Bulletin, vol. 28, No. 5, Oct. 1985, p. 2034.
Albritton C. L.
Prevent-A-Crime International, Inc.
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