초록 ▼

A powder coating apparatus fluidizes coating powder in a powder container and mixes with the fluidized powder an additional substance, such as steam, water or other liquid. The additional substance is delivered into the interior of one or a plurality of enclosed bells which extend across the powder

A powder coating apparatus fluidizes coating powder in a powder container and mixes with the fluidized powder an additional substance, such as steam, water or other liquid. The additional substance is delivered into the interior of one or a plurality of enclosed bells which extend across the powder container. Each bell has a respective lower opening deep enough into the powder container to be immersed in the fluidized coating powder. The additional substance is delivered under pressure through a tube passing through the bell, through outlet nozzles in the tube and into the bell and then pressurizes the bell to keep the fluidized powder out of the bell and to deliver the additional substance out of the lower opening into the fluidized powder.

대표청구항 ▼

A powder coating apparatus, comprising: a powder container for holding powder to be fluidized, the container having a perforated bottom; means, coupled to the bottom of the powder container, for fluidizing the powder in the powder container; apparatus for feeding a flowable additional substance into

A powder coating apparatus, comprising: a powder container for holding powder to be fluidized, the container having a perforated bottom; means, coupled to the bottom of the powder container, for fluidizing the powder in the powder container; apparatus for feeding a flowable additional substance into the fluidized coating powder, the apparatus including: at least one bell disposed in the powder container, the at least one bell having the shape of a closed vessel except for one side thereof which is substantially open to define a contiguous lower opening, the at least one bell being at least partially disposed in the powder container with the lower opening thereof facing the bottom of the container and deep enough therein to be immersed in powder in the container to create an air pocket in the at least one bell whereby the air pocket within the at least one bell is effective for preventing powder from entering into the bell and for maintaining the level of any powder entering the bell lower than the level of the powder outside the bell; means for supplying the additional substance under pressure; a feeding device located in the at least one bell, in the air pocket thereof and therefore above the level of powder in the bell, for feeding the additional substsance from the supplying means into the air pocket in the at least one bell to enable the additional substance to leave the bell through the lower opening therein and to enter into the fluidized coating powder for mixing therewith.