Textiles: fluid treating apparatus – Machines – Liquid supply or vapor supply to liquid
Patent
1980-05-08
1982-12-07
Coe, Philip R.
Textiles: fluid treating apparatus
Machines
Liquid supply or vapor supply to liquid
222 56, 222 64, 366142, 366152, 366153, 366161, 366162, D06B 2326, B01F 1502
Patent
active
043620337
ABSTRACT:
An automatic chemical mixing system using a single level sensor, preferably an ultrasonic sensor, for monitoring the contents of a mixing tank. The level sensor provides an analog signal to a controller indicative of the level of liquid in the tank. Supply pipes from several sources of different chemicals lead to the tank through respective controllable valves. The required percentage of each chemical can be entered manually into the controller and each valve is opened in turn by the controller until the various percentages are reached. Provision is also made for adding small quantities of a further chemical which is supplied by a metering pump. The controller ensures that this is done after the other chemicals have been added. A mixer, also under control of the controller, starts running when all the chemicals have been added and stops when a predetermined low level is reached. A supply line from the tank to a process stage includes a controllable valve which is opened by the controller at the end of a fill cycle and closed when the tank is empty. The system incorporates alarms indicating "slow fill" and other problems. The mixture obtained is of repeatable accuracy and can be used as feedstock to a cloth processing stage in which chemicals are fed to a saturator at a known percentage of the weight of the cloth being processed per minute.
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Coe Philip R.
Dominion Textile, Inc.
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