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:
Apr. 01, 2008
Filed:
Feb. 02, 2006
Dieter B. Heerdt, Hendersonville, TN (US);
Andreas Pahl, Erkrath, DE;
Dieter B. Heerdt, Hendersonville, TN (US);
Andreas Pahl, Erkrath, DE;
Illinois Tool Works Inc., Glenview, IL (US);
Abstract
An electronic control circuit, for use in connection a hot melt adhesive dispensing system having a relatively large applicator head, has a plurality of heater circuits and a plurality of temperature sensors disposed upon different regions of the relatively large applicator head, wherein the electronic control circuitry can effectively interface between the plurality of heater circuits and the plurality of temperature sensors, and the adhesive supply unit (ASU) hose and head connector, so as to control individual ones of the plurality of heater circuits and thereby ensure that all of the heater circuits will maintain the same temperature setting throughout all regions of the applicator head. A second electronic control circuit enables the temperature sensors to effectively be eliminated due to the fact that the temperature value of each heater circuit can be calculated from resistance and temperature coefficient values characteristic of the heater circuit, wherein the electronic control circuitry can again interface between the heater circuit and the adhesive supply unit (ASU) temperature controller.