Asahi Chemical Synthetic Co., Ltd.

Melt Technical & Research Co., Ltd.

Sankichi Ohi

Naoki Kobayashi

Apparatus for intermittently applying a fluid coating substance such as a workpiece or a substrate on an object such as a workpiece or a substrate. The apparatus is provided with a storage chamber to which is provided the fluid coating substance under pressure. The storage chamber has an inner rigid side provided with an orifice nozzle through which the coating substance is discharged for application. The coating substance is discharged intermittently in discrete quantitites, of minute volume if desired. The discharge is effected under control of a rotatably driven discoidal rotor in the form of a ceramic discoid disposed interiorly of the storage chamber. The discoidal rotor is provided with a through opening in the form of a cross sectional passageway extending between opposite sides thereof. The discoidal rotor has one of its sides bearing on the side of the storage chamber and as it rotates the passageway therein is intermittently aligned with and in communication with the orifice of the storage chamber. The passageway thus establishes communication periodically between the orifice and the interior of the storage chamber and the fluid coating substance is accordingly discharged under pressure as discrete small volume quantitites. The rotor is coupled to a driven shaft by a disk and universal joint constructed to maintain the rotor one side bearing closely against the rigid inner surface of the side of the storage chamber and to allow the rotor to move axially in its axis of rotation toward the orifice side of the storage chamber in response to a biasing force.

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Tokyo, Japan

Sankichi Ohi