Coating apparatus – Projection or spray type – Applying solid particulate material
Reexamination Certificate
2006-07-11
2006-07-11
Fiorilla, Chris (Department: 1734)
Coating apparatus
Projection or spray type
Applying solid particulate material
C118S326000, C454S053000, C055SDIG046
Reexamination Certificate
active
07074274
ABSTRACT:
Systems and methods for applying powder coating materials in electrostatic spray systems are provided. For example, a gravity feed of recovered powder coating from the recovery system to the feed system is disclosed. In addition, a powder feed system is disclosed wherein a powder suction lance assembly has only two operable positions, a first for feeding powder from a fluidized hopper and also corresponding to a purge position for a novel purge manifold, and a second retracted position for powder color changes and servicing. Also, a pump assembly block in physical communication with an air line attachment plate, a suction tube plate, and a hose manifold is disclosed. A plurality of attachment members removably attach the air attachment plate, a suction tube plate, and the hose manifold plate to the pump assembly block. Method for applying a first powder color and a second powder color in a powder feed center are also provided. The one method includes, among other things, the step of replacing a first pump assembly and with a second pump assembly that is in fluid communication with the one or more spray devices. The second pump assembly may be a new, previously cleaned, or color dedicated pump assembly. So configured, the present invention reduces the amount of time required for a powder color change in an electrostatic spray system and reduces color cross-contamination effects involved when changing between powder colors. Powder contacting surfaces are reduced, as well.
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Jones Edward L.
Kreeger Kenneth A.
Peddie Andrew M.
Schroeder Joseph G.
Shutic Jeffrey R.
Calfee Halter & Griswold LLP
Fiorilla Chris
Nordson Corporation
Tadesse Yewebdar
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