Method for automatically controlling a chemical cleaning stage of a metal strip cleaning line

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United States of America Patent

PATENT NO 6524391
APP PUB NO 20020139391A1
SERIAL NO

09823556

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Abstract

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An automatic system is used for controlling the cleaning stage of a strip cleaning line, e.g. an aluminum strip cleaning line. The cleaning line includes a chemical cleaning section and at least one rinse section, with cleaning solution being sprayed onto the top and bottom faces of the aluminum strip as it passes through the cleaning section. A programmable logic controller has a dwell time set point for each coil of aluminum strip, which gives for standard conditions of chemical concentration and temperature the time the strip should be exposed to the spray. The controller receives input signals based on the measured temperature and concentration of the cleaning solution and adjusts the dwell time of the cleaning solution spray on the aluminum strip accordingly.

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Patent Owner(s)

Patent OwnerAddress
ALCAN INTERNATIONAL LIMITEDMONTREAL QUEBEC H3A 3G2

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Simpson, Stephen D Kingston, CA 4 13

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