Apparatus for automatic film thickness control

Details Apparatus for automatic film thickness control Apparatus for automatic film thickness control

1990-02-16

1992-09-15

Jones, W. Gary

Coating apparatus

Control means responsive to a randomly occurring sensed...

Responsive to attribute, absence or presence of work

118697, 118712, 118126, 118407, 118413, B05C 502

Patent

active

051474620

ABSTRACT:
Paint or the like coating is applied to a gap between an elongated strip article and an extended surface, such as a coating head. A variable load, such as provided by air cylinders, is continuously exerted on the extended surface during operation for urging the extended surface against the applied layer on the strip, so as to maintain a uniform metering gap between the extended surface and the coated strip surface. The extended surface has a sensor for repetitively determining metering gap. A computer monitors the sensor output and causes load-exerting air cylinders to vary their applied load, in order to urge the coating head toward or away from the back-up roll, so as to reduce difference between the sensed metering gap and a predetermined gap, thus producing a uniform coating film thickness on strip articles having non-uniform surface topography.

REFERENCES:
patent: 2909660 (1959-10-01), Alexander
patent: 4291642 (1981-09-01), Kolc
patent: 4375202 (1983-03-01), Miller
patent: 4675230 (1987-06-01), Innes
patent: 4702931 (1987-10-01), Falcoff
patent: 4732776 (1988-03-01), Boissevain
patent: 4899687 (1990-02-01), Sommer et al.
patent: 4899691 (1990-02-01), Fitzgerald, Jr. et al.

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