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:
Oct. 08, 2013
Filed:
Nov. 26, 2007
Jochen Linhart, Schwikheim, DE;
Andreas Franz, Ludwigsburg, DE;
Jochen Linhart, Schwikheim, DE;
Andreas Franz, Ludwigsburg, DE;
Mann + Hummel GmbH, Ludwigsburg, DE;
Abstract
The invention concerns a method for producing a ceramic filter body () for filtering an exhaust gas stream () of a diesel engine. The filter body () has planar and porous filter sections () that are designed to be passed by the exhaust gas flow () in a direction transverse to the face of the filter sections (). A planar permeable fiber web (), in particular of filter paper, is first impregnated with finely ground ceramic material () only across sections under formation of a non-impregnated section (). The only partially ceramic-impregnated fiber web () is subsequently brought into the shape of a blank of the filter body () in such a way that the impregnated areas of the fiber web () assume the shape of the filter body (). The fiber web () impregnated section-wise with the ceramic material () and shaped is subsequently sintered under heat in such a way that the fibers () of the fiber web are burned off and the ceramic material () is sintered under formation of the filter body () with filter sections () that are continuously porous and gas-permeable between their two faces ().