Method of checking channel connections and detecting heater circ

Details Method of checking channel connections and detecting heater circ Method of checking channel connections and detecting heater circ

1987-03-16

1987-12-29

Smith, Jerry

Boots, shoes, and leggings

364477, 364557, 364580, 371 20, 371 24, F25B 1300, G10M 1900, G05D 2300

Patent

active

047165200

ABSTRACT:
A method of checking to determine (a) whether the heating elements and temperature sensors of the various components of a hot melt heating and dipensing system, such as, hot melt dispensers, hoses, and associated reservoir and manifold, are connected in proper circuit configuration, (b) whether any of the heating circuits are in an open-circuit condition and/or their respectively associated signal-controlled switches which control energization of the heaters thereof are short circuited, and (c) whether any of the temperature sensors are open-circuited. The checking is performed by a microprocessor having multiple channels to different ones of which are connected the sensors and signal-controlled switches of the different system components.

REFERENCES:
patent: 3795916 (1974-03-01), Wallace et al.
patent: 4541066 (1985-09-01), Lewandowski
patent: 4574871 (1986-03-01), Parkinson et al.
patent: 4577149 (1986-03-01), Zbinden

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