Patent ID: 7954446

Claim:
A hopper used for cleaning a coating machine by extending a rotary atomizing head through an opening formed in an upper surface of a hopper housing and spraying a residual coating material and a thinner on the inside thereof upon cleaning a rotary atomizing coating machine by supplying the thinner thereto, comprising: an airstream control member for preventing flow ascending toward the outside of the housing through a gap between the rotary atomizing head and the opening from the inside of the housing by the rotation of the rotary atomizing head positioned below a negative pressure zone formed just below the rotary atomizing head by the rotation thereof corresponding to the gap between the rotary atomizing head and the opening, and an air vent hole formed in the control member for supplying air to the negative pressure zone from a portion therebelow; an upper surface cover formed with an opening mounted detachably to a housing main body forming the peripheral wall of the hopper housing, the airstream control member being formed detachably to the upper surface cover, and the upper surface cover and the air stream control member are exchangeable, the upper surface cover including a plurality of apertures positioned around the peripheral edge of the opening in the upper surface cover; and a plurality of bent brackets extending from the peripheral edge of the airstream control member and extending through respective said apertures formed around the peripheral edge of the opening in the upper surface cover to fix the airstream control member to the upper surface cover.