Apparatus for alternately sifting and blending powders in the same operation

摘要

A tumbling container is mounted for rotation with a curved screen fixedly mounted within the tumbling container. A multiple vane paddle is mounted to a shaft that is rotatably mounted to the tumbling container. The paddle vanes are formed with angular edges. As the tumbler rotates and the paddle rotates, powder is repeatedly dropped onto the screen to be sifted with the aid of the paddle. Rotating the tumbler further drops unsifted portions of the powder from the screen to mix with additional powder in the tumbler body. Thus, sifting and blending of powders is accomplished in one single operation. The invention utilizes an apparatus having a multiple section screen and a multiple section paddle to enable assembly through the openings in the tumbling container. The screen of a second embodiment has a cowl adjacent to each screen opening to optimize powder lump disintegration.

主权项

1. An apparatus for alternately sifting and blending powders in the same operation, comprising:
a. a first screen section; b. a second screen section configured for being assembled in alignment with the first screen section; c. a first end frame configured to be removeably assembled to the first screen section; d. a second end frame configured to be removeably assembled to the second screen section; e. means for assembling the first end frame, the first screen section, the second screen section and the second end frame together; f. a first agitator section; g. a second agitator section configured for being assembled coaxially to the first agitator section between the first and the second end frames; and h. a shaft for mounting the first and second agitator sections for rotation; i. whereas the end frames and the screen sections are removeably assembled within a tumbling container for rotation therewith, and the agitator sections are assembled to each other on the shaft, the shaft mounted to the tumbling container for independent rotation relative thereto.