Importance

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Abstract

The disclosed method and device use a gear rotatably carried by a holder and a movable support board supporting a film-attached ceramic honeycomb body, the gear having pointed teeth disposed at a suitable pitch, and as being thrusted into the body through the film attached to the body the gear is allowed to sway, so that the film is perforated at positions corresponding to selected open ends of throughholes of the body while allowing the gear to sway, so that the throughholes are selectively plugged by pressing sealant therein through the perforated film and the body is rendered into a ceramic honeycomb filter with filtering passages formed of partitions of the thus plugged throughholes.

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First Claim