Coating apparatus – Immersion or work-confined pool type – Work-confined pool
Patent
1996-03-13
1998-01-27
Czaja, Donald E.
Coating apparatus
Immersion or work-confined pool type
Work-confined pool
118423, 118424, 118425, 427 96, B05C 302, B05C 300, B05C 1902
Patent
active
057118060
ABSTRACT:
A machine for use in chemically processing printed circuit board work pieces includes an inner basin within an outer basin. The inner basin holds a chemical liquid bath through which the printed circuit board work pieces are passed by a conveyor in a horizontal orientation along an action line parallel to their own plane. The conveyor includes facilities to oscillate the work pieces perpendicularly to their plane in the chemical liquid bath to effect flow of the chemical liquid through holes and apertures of the work pieces. Part of the chemical liquid bath continuously drains from the inner basin to the outer basin as the chemical treatment process is in operation. An eductor draws liquid from the outer basin and effects a low-pressure, high-volume up-welling of liquid into the inner basin. In this way, stirring of the chemical liquid bath is effected, and both temperature and concentration stratification of the chemical liquid bath is avoided. A chemical processing line may include several layers of the machines ranked one above the other to increase output with no increase in required floor space.
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Czaja Donald E.
Ruller Jacqueline A.
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