APPARECCHIO PER LA FORNITURA DI UNA COMPOSIZIONE TERMOFUSIBILE ALLO STATO FUSO

For enabling a body, e.g. a melt chamber and/or nozzle for a hot-melt composition, to be heated to and maintained precisely at a desired temperature, a predetermined temperature value is stored as a numerical value in a computer, and the output of a sensor, e.g. each of the thermistors (TS 1-3), mou...

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Bibliographische Detailangaben
Hauptverfasser:	ROBERT YARDLEY, EWEN ROTHNIE CAMERON
Format:	Patent
Sprache:	ita
Schlagworte:	AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING CONTROLLING PERFORMING OPERATIONS PHYSICS REGULATING SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES TRANSPORTING WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Beschreibung
Zusammenfassung:	For enabling a body, e.g. a melt chamber and/or nozzle for a hot-melt composition, to be heated to and maintained precisely at a desired temperature, a predetermined temperature value is stored as a numerical value in a computer, and the output of a sensor, e.g. each of the thermistors (TS 1-3), mounted on the body, whose output is in the form of an analogue signal, is supplied to an A-D convertor which converts the signal to a numerical value, this output value and the stored value being then compared, at predetermined intervals, and a command being supplied to the respective heater circuit (H1-3) appropriate to the difference between the two values. When the temperature enters a predetermined band about the desired temperature, the heater circuit is energised by regular pulses of variable duration.