Curtain coating apparatus having a planar deflector surface and

Coating processes – Falling curtain of coating material utilized

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118324, 118DIG4, B05D 130, B05C 500

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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.

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