Coating processes – Immersion or partial immersion – Metal base
Patent
1982-11-01
1984-09-04
Beck, Shrive P.
Coating processes
Immersion or partial immersion
Metal base
118686, 118673, 118698, 4274301, B05D 126
Patent
active
044697236
ABSTRACT:
An improved method to calculate the relative position between a plating head and an intermittently moved web of material that is to be plated wherein a nozzle directs pressurized fluid through an aperture in the web and the back pressure is monitored as an indication of the relative position of the nozzle and the aperture. Back pressure is represented digitally and a microprocessor waits an interval for the pressure to stabilize, compares the digital signal to a look up table in memory to determine the error in position, and commands movement of the plating head a distance sufficient to bring the error to zero.
REFERENCES:
patent: 4357900 (1982-11-01), Buschor
patent: 4364977 (1982-12-01), Bernardi
Beck Shrive P.
National Semiconductor Corporation
Pollock Michael J.
Winters Paul J.
Woodward Gail W.
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