Patent ID: 6863705

Claim:
A method of manufacturing an exhaust gas purifying filter for purifying exhaust gas by collecting particulates contained in exhaust gas exhausted from an internal combustion engine, comprising the steps of: making a honeycomb body having bulkheads, which are formed into a honeycomb-shape, and also having a plurality of cells, which are partitioned by the bulkheads and penetrate both end faces, when ceramic material containing organic binder is formed into the honeycomb body by extrusion, dried and cut into a predetermined length; inserting a tapered jig having a tapered forward end portion into an opening portion of the cell of the honeycomb body; heating the bulkheads so as to soften them; deforming the bulkheads by a pushing force given by the tapered jig so that the opening portion of the cell is expanded and a large opening portion is formed and an opening portion of the adjoining cell is reduced; and firing the honeycomb body.