Coating processes – Electrical product produced – Integrated circuit – printed circuit – or circuit board
Patent
1979-11-14
1982-02-02
Lusignan, Michael R.
Coating processes
Electrical product produced
Integrated circuit, printed circuit, or circuit board
427422, B05D 106
Patent
active
043139680
ABSTRACT:
A method of applying a coating composition, which preferably has a high solids content, to a workpiece. The method is one wherein a coating composition is atomized into liquid particles, an electrical charge is imparted with an induction charging electrode means on the particles substantially simultaneously with their formation, and the charged particles are directed to an electrically-receptive workpiece, and includes the improvement comprising heating the coating composition to adjust its conductivity and to enhance the induction charging of the particles formed from the heated coating composition. In a preferred embodiment, the charged particles are cooled before they reach the workpiece.
REFERENCES:
patent: 4009829 (1977-03-01), Sickles
patent: 4073966 (1978-02-01), Scholes et al.
Walberg, A. Electrostatic, "Application of Water-Born and High-Solids Coatings" in Plating and Surface Finishing, Feb. 1978.
Luneberg et al, "Electrostatic Spraying of Water Thinned Paints" in Metal Finishing, Oct. 1962.
Chang Wen-Hsuan
Sickles James E.
Akorli Godfried R.
Bell Janyce A.
Lusignan Michael R.
Morris George D.
PPG Industries Inc.
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