Coating processes – Measuring – testing – or indicating
Patent
1991-02-25
1993-11-30
Bell, Janyce
Coating processes
Measuring, testing, or indicating
427 96, 427256, 427287, 427375, 427421, 427424, B05D 312
Patent
active
052663493
ABSTRACT:
Spray coating, particularly flat spray coating of circuit boards. Applicant's method of discrete conformal coating eliminates "railroading" at the edges of the flat spray web and assures precise control of the amount of coating material placed on the circuit board surface, as well as on the varying and complex circuit board components. The method includes pressurizing the coating; longitudinally advancing a surface to be coated, such as a circuit board, beneath the coating, while simultaneously feeding the coating onto the advancing surface as a plural series of aligned droplets extending transversely across the advancing surface. The feeding of coating is triggered "ON/OFF" so as to define longitudinally the series of droplets feeding onto the advancing surface.
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Bell Janyce
Specialty Coating Systems Inc.
Volles W. K.
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