Method and apparatus for controlling a coating head, and a coating head

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United States of America Patent

PATENT NO 9393593
APP PUB NO 20130064968A1
SERIAL NO

13699703

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Abstract

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A method and apparatus are described for controlling a coating head, which exerts a nip pressure to a fibrous web to be coated while the fibrous web is supported by a backing roll. An output signal of a sensor integrated within the backing roll is read, thus producing a measured indication of the nip pressure. A number of actuator control values are derived at least partly from said measured indication of the nip pressure. Said actuator control values are delivered as commands to a number of respective actuators that contribute to creating the nip pressure, to control an amount of a coating substance on the fibrous web in the coating head.

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Patent Owner(s)

Patent OwnerAddress
VALMET TECHNOLOGIES INCKEILASATAMA 5 ESPOO FI-02150

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Niemi, Olli Helsinki, FI 1 1
Pitkänen, Tatu Nummenkylä, FI 10 7

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