Process and apparatus for electrostatic coating of poorly conduc

Details Process and apparatus for electrostatic coating of poorly conduc Process and apparatus for electrostatic coating of poorly conduc

1984-05-21

1985-04-09

Bueker, Richard

Coating processes

Electrical product produced

Integrated circuit, printed circuit, or circuit board

427 27, 427212, 118303, 118628, 118629, 118630, 118634, B05B 502, B05D 104

Patent

active

045101701

ABSTRACT:
In the electrostatic application of a coating material on to a product to be coated, the product leaves a supply hopper over a tube enlargement and falls freely in a chamber in the form of a tubular curtain. The tubular curtain falls around a central, elongate, vertical corona discharge electrode so that a high voltage electrostatic charge of one sign is applied to the falling curtain of the product. Coating material is sprayed on to the product by atomizers in the chamber. A high voltage electrostatic charge of opposite sign is applied to the coating material by way of the atomizers.

REFERENCES:
patent: 2594469 (1952-04-01), Mahoney
patent: 2644769 (1953-07-01), Robinson
patent: 3198655 (1965-08-01), Gisiger
patent: 4209550 (1980-06-01), Hagenbach et al.

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