Coating apparatus – Projection or spray type – Applying solid particulate material
Patent
1975-12-15
1977-04-19
Rimrodt, Louis K.
Coating apparatus
Projection or spray type
Applying solid particulate material
118DIG5, 118629, B05B 714
Patent
active
040181855
ABSTRACT:
A powder feeder pick-up tube having a central powder delivery tube receiving powder entrained in a propellant gas, an outer concentric tube delivering propellant gas to the powder delivery tube and evenly entraining powder in the gas as the powder enters the powder delivery tube. The propellant delivery tube has an inwardly curving end that forms a gap with the open end of the powder delivery tube, and the geometry of the curving end and the size of the gap are factors determining the operational characteristics of the pick-up tube. Variations on the basic pick-up tube include a concentric fluidizing tube surrounding the propellent delivery tube and locally fluidizing powder around the opening of the powder pick-up tube. The shape of the fluidizing orifice at the outlet of the fluidizing tube may be modified to alter its fluidizing characteristics. The tube is immersed in a hopper of powder when operating and the entire hopper may be fluidized and vibrated to assist the operation of the pick-up tube. Passing fluidizing gas through the fluidizing tube allows a reserve tube to remain immersed in a powder hopper without clogging when not in use.
REFERENCES:
patent: 1585990 (1926-05-01), Houghton
patent: 2093995 (1937-09-01), Blow
patent: 2242182 (1941-05-01), McCann
patent: 3100724 (1963-08-01), Rocheville
patent: 3139044 (1964-06-01), Cole
patent: 3472201 (1969-10-01), Quackenbush
patent: 3880116 (1975-04-01), Prillig et al.
Coors Container Company
Rimrodt Louis K.
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