Dispensing – Automatic control – Temperature responsive or soluble controller
Patent
1981-11-27
1984-03-20
Rolla, Joseph J.
Dispensing
Automatic control
Temperature responsive or soluble controller
222 63, B67D 508
Patent
active
044375816
ABSTRACT:
A master control for preventing the operation of a hot melt adhesive pump motor in a hot melt adhesive dispensing system until the adhesive has reached a dispensable molten state. The hot melt adhesive dispensing system includes an adhesive melting tank and a heater for heating the tank, which in turn heats the adhesive. A heater control energizes the heater when the temperature of the tank falls below a predetermined temperature so that, after an initial "on time", the heater control de-energizes the heater for periods of time of increasing length as the temperature of the adhesive increases. The master control enables the operation of the adhesive pump motor when the "off time" of the heater exceeds a predetermined period of time. This predetermined period is selected so that at the corresponding adhesive temperature the adhesive is in a dispensable molten condition.
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Nordson Corporation
Rolla Joseph J.
Shaver Kevin P.
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