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:
Sep. 28, 2004
Filed:
Feb. 27, 2002
Herbert Günther, Allendorf, DE;
Christel Kretschmab, Borhen, DE;
Peter Otschik, Possendorf, DE;
Gunther Heisskanaltechnik GmbH, Frankenberg, DE;
Abstract
An electric surface heating element is installed by direct application to the periphery of a cylindrical material pipe ( ) of a hot runner nozzle ( ). Said surface heating element consists of a ceramic dielectric layer ( ) which is directly applied to the metal pipe ( ) or to the wall ( ) thereof, at least one layer ( ) consisting of heating conductor strips ( ) and an electrically insulating ceramic covering layer ( ) which is applied on top of the latter. Film, or thick-coat screen printing technology are suitable as coating processes. However, thick-coat technology using round printing is preferably used for the layer construction as a whole. Alternatively, the ceramic dielectric layer ( ) can be fixed to the periphery of the hot runner pipe ( ) in the form of a prefabricated green film and subsequently baked.