Honeycomb filters with reduced number of unplugged partial peripheral cells and methods of manufacturing same
US7517379B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 16, 2005 |
| Grant date | Apr 14, 2009 |
| Priority date | — |
| Expiry date | May 23, 2027 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/24149
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method of blocking partial cells at the periphery of diesel filters is disclosed. The method comprises plugging the partial cells with a suitable plugging material. In one embodiment, a line of plugging material is applied to either or both of the end faces of the diesel filter along an outermost row of partial cells to block same. In another embodiment, the outermost wall the diesel filter is first beveled to form a beveled edge and uniquely off-set the partial cells. Then the beveled edge has applied thereto a plugging material, such as a line or bead. A honeycomb structure having reduced number of unplugged partial cells at the periphery is also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.