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. 10, 2012
Filed:
Sep. 23, 2008
Frank-günter Niemz, Rudolstadt, DE;
Bernd Riedel, Unterwellenborn, DE;
Carmen Knobelsdorf, Saalfeld, DE;
Frank-Günter Niemz, Rudolstadt, DE;
Bernd Riedel, Unterwellenborn, DE;
Carmen Knobelsdorf, Saalfeld, DE;
Thüringisches Institut für Textil-und Kunststoff-Forschung E.V., Rudolstadt, DE;
Abstract
The invention relates to a flat heater, which is used for applications in the range of heating voltages of up to 1000 V, produces attainable powers of up to 2 kW/mand is characterized by the fact that the electrical resistance required for the heating is formed by an electrically conductive cellulose nonwoven. Metallic contacts which are incorporated ensure the connection of the conductive cellulose nonwoven to a voltage source. Polymer films applied on both sides provide mechanical and electrical protection and prevent the ingress of moisture into the cellulose nonwoven.