Title:
EXHAUST GAS PURIFYING FILTER
Document Type and Number:
WIPO Patent Application WO/2003/076773
Kind Code:
A1
Abstract:
An exhaust gas purifying filter comprising a honeycomb structure made of porous ceramic material and having a plurality of through-holes (3), one of the respective ends of predetermined ones of the through-holes (3) and the other ends of the remaining through-holes (3) being formed with pore seals (10), whereby a partition wall (2) partitioning the through-holes (3) serves as a filter layer, the exhaust gas purifying filter being characterized in that the pore sealing lengths of the pour seals (10) differ from each other. While having such characteristics as high porosity and thin wall, the filter hardly causes defects, such as damage to pour seals, falling-off and the like, during packing, conveying or handling.
Inventors:
MIWA SHINICHI (JP)
Application Number:
PCT/JP2003/001503
Publication Date:
September 18, 2003
Filing Date:
February 13, 2003
Export Citation:
Assignee:
NGK INSULATORS LTD (JP)
MIWA SHINICHI (JP)
MIWA SHINICHI (JP)
International Classes:
B01D39/14; F01N3/02; B01D39/20; B01D46/00; B01D46/24; B01D53/94; B01J35/04; B28B11/00; F01N3/022; F01N3/035; (IPC1-7): F01N3/02
Foreign References:
| EP0737801A1 | 1996-10-16 | |||
| JPH02112919U | 1990-09-10 | |||
| JPS6110917U | 1986-01-22 | |||
| JPH0263020U | 1990-05-11 | |||
| JPH04243524A | 1992-08-31 |
Other References:
See also references of EP 1484482A4
Attorney, Agent or Firm:
Watanabe, Kazuhira (No.8 Kikuboshi Tower Building 20-1, Asakusabashi 3-chome Taito-ku Tokyo, JP)
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