Method of controlling thickness of coated film on web-like membe

Coating processes – Measuring – testing – or indicating – Thickness or uniformity of thickness determined

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427428, 118249, 118258, 118672, 118708, B05D 128

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053105737

ABSTRACT:
A paint in a paint pan is picked up through a gap h.sub.PA formed between a pickup roll and an applicator roll, part of the paint is attached to the applicator roll and delivered to a sheet as a supply flow rate q.sub.A. The film thickness coated on the sheet is controlled in accordance with a model equation: M={(q.sub.A -q.sub.L).multidot..gamma..multidot.C}/LS which has evaluated a difference between the supply flow rate q.sub.A and a leak flow rate q.sub.L not transferred onto the sheet, remaining on the applicator roll and escaping through a gap h.sub.AS (.gamma. is the specific gravity of the paint, C the concentration of a solid content of the paint and LS a moving speed of the sheet).

REFERENCES:
Patent Abstracts of Japan, vol. 016, No. 081, Feb. 27, 1992 & JP-A-32 70 759 (Kawasaki Steel Corp.), Dec. 2, 1991.
Patent Abstracts of Japan, vol. 013, No. 042, Jan. 30, 1990 & JP-A-63 242 375 (Sumitomo Metal Ind. Ltd.), Oct. 7, 1988.
Patent Abstracts of Japan, vol. 012, No. 231, Jun. 30, 1988 & JP-A-63 024 119 (Kawasaki Steel Corp.), Feb. 1, 1988.
Patent Abstracts of Japan, vol. 014, No. 340, Jul. 23, 1990 & JP-A-21 16 705 (Kawasaki Steel Corp.), May 1, 1990.
Patent Abstracts of Japan, vol. 005, No. 054, Apr. 15, 1981 & JP-A-56 007 663 (Murayama Fumio), Jan. 26, 1981.

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