| 摘要 |
Disclosed is a new and improved apparatus primarily developed for use in dispensing powder to a media surface comprising a mounting means, a hopper tube, a poro us hopper feed roller, a vortex chamber, a plurality of primary air manifolds a nd a plurality of two air bars. The hopper tube contains the porous hopper feed roller in rotatable manner. The porous hopper feed roller controls the quantity of powdered particulate material being discharged into the vortex chamber. A variable speed motor is provided and provides for 1/2 to 25 RPM rotational speed of the porous hopper feed roller. The vortex chamber receives the desired quantity of powdered particulate materia l from the hopper tube. The vortex chamber has an air pressure receipt means creating a vortex of rotating air within the vortex chamber. The vortex of rotating air within the vortex chamber receives the powdered particulate material from the hopper tube. The vortex chamber has an air pressure discharge means. A plurality of two primary air manifolds are provided receiving a measured amount of air pressure from an outside air pressure source. A plurality of two longitudinal air bars are provided.
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