Ngk Insulators, Inc.

Masahiro Masuda

Yukihito Ichikawa

Nobuhiro Terada

Tatsuhiko Hatano

Naoya Fukuda

Eigo Hirotsuzi

A method for manufacturing a plugged honeycomb structure includes the steps of: applying a predetermined amount of the plugging slurry on a face of an end face sealing member, one end face of the masked honeycomb structure is pressed against the face to which the plugging slurry was applied of the end face sealing member to fill the plugging slurry in the predetermined cells on the one end face side, and drying at least the plugging slurry at a portion in contact with the face of the end face sealing member in a state that the face of the end face sealing member is pressed against the one end face of the masked honeycomb structure. The method can manufacture simply at a low cost a plugged honeycomb structure with reduced accumulation of deposit on an end face when the honeycomb structure is used as a filter or the like.

Method for manufacturing plugged honeycomb structure

A method of producing a composite type magnetic head core, WHEREIN a first and a second ferrite block are joined together into an integral ferrite structure, such that a metallic magnetic film is interposed between opposite portions of joining surfaces of the two ferrite blocks which define a magnetic gap open in a track portion provided by the ferrite blocks, and said integral ferrite structure is cut to shape a yoke portion which includes at least a part of the track portion. Said metallic magnetic film, said track portion and said yoke portion having a first, a second and a third width as measured in a direction parallel to said magnetic gap, respectively, characterized in that: Before the two ferrite blocks are bonded together at the joining surfaces, the metallic magnetic film is formed on at least one of the opposite portions of the joining surfaces, such that the width of the film is no less than the width of the track portion, and is no more than the width of the yoke portion.

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Inuyama, Japan

Masahiro Masuda