Patent ID: 8883286
Filing Date: 2014-11-11
Classification: B01D,F01N,Y02T,Y10T

Abstract:
1. A honeycomb structure comprising: a ceramic block including at least one honeycomb fired body that has cell walls extending along a longitudinal direction of the at least one honeycomb fired body to define cells and that has a peripheral wall formed around the at least one honeycomb fired body, wherein the peripheral wall of the at least one honeycomb fired body, which forms a periphery of the ceramic block, is a stepped peripheral wall provided with a level difference including a projected portion and a recessed portion in a cross section perpendicular to the longitudinal direction of the at least one honeycomb fired body, wherein the projected portion and the recessed portion are formed by at least one of a curved line and a straight line in the cross section perpendicular to the longitudinal direction of the at least one honeycomb fired body by being subjected to chamfering, wherein the peripheral wall includes a first portion extending from one end of the peripheral wall to the projected portion that is chamfered, the first portion being formed entirely of a planar outer surface that extends from the one end to the projected portion that is chamfered, and wherein the planar outer surface of the first portion extends along cell walls of a plurality of the cells of the at least one honeycomb fired body.