Coating processes – Electrical product produced – Integrated circuit – printed circuit – or circuit board
Patent
1983-07-25
1985-02-19
Lusignan, Michael R.
Coating processes
Electrical product produced
Integrated circuit, printed circuit, or circuit board
427 32, 427321, 427329, 4273983, 427433, B05D 104, B05D 118
Patent
active
045005613
ABSTRACT:
The molten exterior surface portion of a hot dip galvanized steel strip is solidified after the strip is withdrawn from a bath of molten zinc by spraying finely divided particles of a liquid nucleating agent for initiating solidification. The particles are sprayed into an electrostatic field alongside the strip. The particles are initially directed along a path which avoids impingement against the strip. However, the smaller particles are attracted to the strip under the influence of the electrostatic field, to initiate solidification. The larger particles have a momentum along their path large enough to resist the influence of the electrostatic field, thereby permitting the larger particles to continue along a path which avoids impingement. This minimizes the formation of undesirably large spangles and an undesirable surface appearance on the strip.
REFERENCES:
patent: 2094583 (1937-10-01), Cook et al.
patent: 2605377 (1947-04-01), Kaehni et al.
patent: 2994618 (1922-01-01), Landgraf
patent: 3004514 (1961-10-01), Loes
patent: 3148080 (1960-05-01), Mayhew
patent: 4284495 (1981-08-01), Newton
Cox, Technical Paper FC81-433, "New Developments in Electrostatic Deposition of Functional Coatings", Society of Manufacturing Engineers, Dearborn, Michigan, 1981.
"Electrostatics and Its Application", John Wiley & Sons, New York, 1973, Chapter 11, Electrostatic Coating, pp. 250-269.
International Science and Technology, Jan., 1967, "Electrostatic Engineering", pp. 38-45.
Carter William A.
Coduti Phillip L.
Kim Yong-Wu
Sok Brian A.
Inland Steel Company
Jaconetty Ken
Lusignan Michael R.
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