Abstract: The powder paint feeder for powder coating directly is installed to a powder paint tank of a fluidized bed type. In the powder paint feeder, a cylindrical screw casing is inserted into the powder paint tank and fixed thereto and has an introducing port into which the powder paint fluidized in the powder paint tank is introduced and a discharging port through which the powder paint dispersed externally of the powder paint tank is discharged. A screw is accommodated in the screw casing and feeds the powder paint introduced from the introducing port to the discharging port while compacting it. A deaerating device is disposed to the screw casing and deaerates the fluidized powder paint to accelerate the compaction of the powder paint. A dispersing blade is mounted on the rotational shaft of the screw in the vicinity of the discharging port downstream of the screw for dispersing the compacted powder paint. A driving device rotates the rotational shaft of the screw.

Abstract: A powder supplying apparatus supplies, for example, a powder spraying apparatus with fine powder particles such as of ceramics having particle sizes of several .mu.m to 10 .mu.m at an extremely small rate of several grams to several tens of grams per hour, in the form of micronized discrete particles dispersed at a high degree of uniformity. The powder spraying apparatus is capable of spraying the fine powder particles on an object surface with a high degree of uniformity of distribution. The disclosed apparatus is used typically in uniformly spraying the above-mentioned fine powder particles which serve as spacers between a pair of transparent substrates of a liquid crystal display panel, for the purpose of maintaining a uniform and constant gap to be filled with a liquid crystal between these transparent substrates.

Abstract: A method of spraying a powder onto a substrate includes the steps of mounting the substrate in a fixed position; mounting a spray nozzle such that an outlet end thereof confronts the substrate; moving the spray nozzle such that a locus on the spray nozzle moves along a zig-zag pattern; and spraying the powder from the spray nozzle onto the substrate during the movement of the spray nozzle. The step of mounting the spray nozzle includes mounting the spray nozzle to a first oscillation link, and mounting the first oscillation link to a reciprocable slider. The step of moving the spray nozzle includes oscillating the first oscillation link relative to the slider, and reciprocating the slider during oscillation of the first oscillation link. The step of mounting the spray nozzle further includes mounting the slider to a second oscillation link. The step of reciprocating the slider includes oscillating the second oscillation link about a pivot point.

Abstract: A powder supplying apparatus supplies, for example, a powder spraying apparatus with fine powder particles such as of ceramics having particle sizes of several .mu.m to 10 .mu.m at an extremely small rate of several grams to several tens of grams per hour, in the form of micronized discrete particles dispersed at a high degree of uniformity. The powder spraying apparatus is capable of spraying the fine powder particles on an object surface with a high degree of uniformity of distribution. The disclosed apparatus is used typically in uniformly spraying the above-mentioned fine powder particles which serve as spacers between a pair of transparent substrates of a liquid crystal display panel, for the purpose of maintaining a uniform and constant gap to be filled with a liquid crystal between these transparent substrates.