Coating processes – Falling curtain of coating material utilized
Patent
1997-12-16
1999-06-01
Bareford, Katherine A.
Coating processes
Falling curtain of coating material utilized
118324, 118DIG4, B05D 130, B05C 500
Patent
active
059086688
ABSTRACT:
In a process for the coating of boards (4) with a poured material (L), especially for the coating of printed circuit boards with, for example, solder resist, the boards (4) to be coated are transported through and beneath a curtain of poured material descending transversely to the transport direction and the poured material descending in the form of a pouring curtain (LV) thus falls onto the boards (4). The descending pouring curtain (LV) falls onto a planar deflector surface (20) before falling onto the board (4), with an acute angle (.alpha.) being formed between the deflector surface (20) and the plane of the pouring curtain (LV), which deflector surface (20) has a cut-off edge (21) at its lower end. After falling onto the deflector surface (20), the poured material runs along that deflector surface (20) downwards towards the cut-off edge (21) and then descends onto the board (4).
REFERENCES:
patent: 4135477 (1979-01-01), Ridley
patent: 4230793 (1980-10-01), Losert et al.
patent: 5136970 (1992-08-01), Saitee et al.
Patent Abst's of Japan. vol. 95 No. 3, Apr. 28, 1995 of JP 06 338,449 A.
Bulow Hans-Georg
Niesser Diana
Bareford Katherine A.
Ciba Specialty Chemicals Corporation
Crichton David R.
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