Toyo Ink Manufacturing Company

Naoji Mizoguchi

Kazuo Kaneko

Fumio Yoshida

Yasuhiko Murase

Eiichi Takama

Kouichi Kanai

A continuous dispersing apparatus in which stirring vanes in a vessel disperse pulverizing media, wherein mill base containing coarse pigment particles is prevented from being discharged. The apparatus includes a vessel for containing pulverizing media with a supply inlet and a discharge outlet being formed at respective ends of the vessel, a rotating disc mounted on a rotating shaft passing through the vessel, and a partition defining a gap which prevents the passage of the pulverizing media while passing dispersed material, the partition dividing the vessel into a plurality of chambers. Each chamber is provided with at least one stirring device mounted on the rotating shaft. The partition includes a rotating disc releasably fixed to the rotating shaft and a ring-shaped plate releasably fixed to the vessel.

Continuous dispersing apparatus

A method for preparing a resinous pigment composition is disclosed which method includes charging pigment, water and water-insoluble resin which is solid at room temperature into a mill containing a dispersing medium and milling the charge at a temperature below the softening point of the resin to reduce the pigment to a fine powder and to disperse it uniformly throughout the resin.

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Tokyo, Japan

Naoji Mizoguchi