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, 2010
Filed:
Nov. 29, 2007
Ralph Henry Hagg, Corning, NY (US);
Ralph Henry Hagg, Corning, NY (US);
Corning Incorporated, Corning, NY (US);
Abstract
A plugging apparatus for plugging channels in a honeycomb structure used to form a particulate filter. The apparatus includes an extrusion apparatus that holds plugging material and that has an opening through which the plugging material is extruded. An extrusion plate having first through holes that correspond in location to a subset of honeycomb channels is arranged adjacent the opening. An annular flow plate is operatively arranged face-to-face with the extrusion plate. The annular flow plate has second through holes corresponding in location to the first through holes but that are smaller to compensate for a radial variation in the extrusion rate when plugging the channels in the honeycomb structure. The plugging apparatus is thus able to fill select channel ends with same-size plugs, which leads to a better-performing filter.