Plastic and nonmetallic article shaping or treating: processes – Laser ablative shaping or piercing
Patent
1995-02-22
1996-09-10
Vargot, Mathieu D.
Plastic and nonmetallic article shaping or treating: processes
Laser ablative shaping or piercing
21912166, 264434, B23K 2616
Patent
active
055543359
ABSTRACT:
A process is provided for producing contrasting, long lasting, glassy heat fused images on the surface of ceramic materials such as bricks using a laser to vitrify the substrate material. The process is accomplished in three stages: Stage 1) the laser produces a non-adherent, highly light absorptive layer by heating and removing material from the marking field to create depth into the brick's surface; Stage 2) melting of the main portion of the substrate material along the marking field using the non-adherent light absorptive layer from Stage 1 as an effective light absorber/heat transducer to cause vitrification along the marking field; Stage 3) residue from the melting in stage 2 is removed by laser ablation to produce the vitrified finished mark.
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"Low Pressure Pulsed CO.sub.2 Laser and Its Use For Scribing Pyroceramic Plates", Vol'ter +Sviridov, Soviet Journal of Optical Technology, 45(6), Jun. 1978, p. 376+378.
Fields William C.
Fredrick Dan
Grannemann Steve
Hannan Phyllis
Lukashevsky Igor
Laser Light Technologies, Inc.
Vargot Mathieu D.
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