The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 24, 2005
Filed:
Jul. 15, 2003
Herbert Günther, Allendorf (Eder), DE;
Herbert Günther, Allendorf (Eder), DE;
Gunther GmbH & Co. Metallverarbeitung, Frankenberg, DE;
Abstract
A temperature sensor for use in hot runner systems includes a resistive element which is connectable via contacting means to a control circuit for a heating device and which includes at least one element portion of larger electrical resistance than its remaining portions, preferably larger by a factor of 2 to 100. The resistive element portions may form U-shaped bows or loops or may be meandering. Two resistive tracks above one another are separated by insulating layers, e.g. ceramic dielectric layers. The resistive element portions may consist of different materials. In connection with a heating device, the temperature sensor is located on or in the body of a manifold or a nozzle, with meandering and/or bifilar heating conductors whose electrical resistance in the middle is smaller than in the top and bottom regions. The temperature sensor portion is tightly enclosed in a zone of high resistance by adjacent heating conductors. A dielectric layer may be undetachably fixed to the manifold or nozzle body and after firing, be under compressive pretension relative to the body.