Coating processes – Direct application of electrical – magnetic – wave – or... – Electrostatic charge – field – or force utilized
Patent
1996-09-25
1998-08-18
Beck, Shrive
Coating processes
Direct application of electrical, magnetic, wave, or...
Electrostatic charge, field, or force utilized
427476, 427478, 118621, 118622, 15 151, 15345, 15354, 451 38, 451 87, 451102, B05D 106, B05B 500, B05B 512, B05C 502
Patent
active
057956260
ABSTRACT:
An environmentally compliant triboelectric applicator and process for coating or ablating a substrate and for retrieving excess or ejected material from the substrate. The applicator comprises an inner supersonic nozzle for accelerating triboelectrically charged projectile particles entrained in a supersonic gas to speeds sufficiently high to coat or ablate a substrate and an outer evacuator nozzle coaxially surrounding the inner supersonic nozzle for retrieving excess projectile particles, ablated substrate powders, or other environmentally hazardous materials. A fluid dynamic coupling uses the efficacy of the Mach turning angle associated with a supersonic boundary layer of carrier gas to aspirate the central core of the supersonic two-phase jet. This fluid coupling and spacing between the outlet of the supersonic nozzle and the substrate also permits the projectile particles and substrate to triboelectrically charge to levels which induce electrostatic discharges at the substrate simultaneous to the impacts.
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Tables charting properties of various elements; "Velocity of Particle" and Power Density are the only dynamic values.
Gabel Howard
Tapphorn Ralph M.
Beck Shrive
Innovative Technology Inc.
Parker Fred J.
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