Patent ID: 7846527
Filing Date: 2010-12-07
Classification: B01D,F01N,Y10T

Abstract:
1. A honeycomb filter including porous partition walls which define a plurality of cells as through channels of a fluid, first cells opened in one end of the filter and plugged in the other end thereof and second cells plugged in the one end and opened in the other end being alternately arranged, the fluid flowing into the one end of the filter where the first cells open being passed through the partition walls and being discharged as the passed fluid into the second cells, the passed fluid being discharged from the other end of the filter where the second cells open, wherein each cross-sectional area of the first cells is larger than that of the second cells in a cross section cut along a plane perpendicular to the longitudinal direction of the cells, the first cells and the second cells are alternately arranged in a first direction and a second direction perpendicular to the first direction in the cross section cut along the plane perpendicular to the longitudinal direction of the cells, the thickness of a 1-1 wall between the adjacent first cells is larger than that of a 1-2 wall between each first cell and the second cell adjacent to the first cell, and the thicknesses of the porous partition walls satisfy the following formula (1): in which Rib Rib