Chemistry: electrical and wave energy – Processes and products – Electrostatic field or electrical discharge
Patent
1990-08-17
1992-12-01
Niebling, John
Chemistry: electrical and wave energy
Processes and products
Electrostatic field or electrical discharge
205149, 205150, 204201, 204222, 204214, C25D 500
Patent
active
051677792
ABSTRACT:
A process and apparatus for obtaining an intensive and continuous exchange of electrolyte on the surfaces of workpieces (11, 21) subjected to chemical or electrolytical treatments wherein the exchange is achieved by subjecting the workpieces (11, 21) to strong pulsating oscillations of a frequency of at least 1 Hz and of an amplitude of less than 10 mm, when immersed in the electrolyte. The vibrations are transmitted from an oscillation generator (3) mounted on a workpiece carrier, such as a rack (1, 4) or a rotating dipping drum 92). These high frequency low amplitude oscillations may be combined with low frequency, relatively long oscillations (7, 9, 10, 18), occurring simultaneously. The oscillation generator (3) is arranged on the individual transportable workpiece carriers (1, 2, 14). The workpieces may be boards (11) for printed circuits having through holes (12) or a pourable mass of parts (21).
REFERENCES:
patent: 2697689 (1954-12-01), Barr et al.
patent: 4229276 (1980-10-01), Kobayashi et al.
patent: 4508396 (1985-04-01), Doi et al.
patent: 4726884 (1988-02-01), Sawa
patent: 4883575 (1989-11-01), Yasuno et al.
Niebling John
Phasge Arun S,.
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