Abstract: Method for applying powder to objects, such as electric motor stators and permeable substrates. The apparatus includes a first chamber having upper and lower portions. A powder fluidizing bed is disposed at the lower portion and receives and fluidizes a bed of powder to form a powder cloud within the first chamber. An opening is disposed at the upper portion of the first chamber and directs at least one stream of the powder from the powder cloud out of the first chamber. An object holder is disposed above the opening and is configured to hold at least one of the objects at a position for intersecting the stream of powder.

Abstract: Apparatus for applying powder to objects, such as electric motor stators and permeable substrates. The apparatus includes a first chamber having upper and lower portions. A powder fluidizing bed is disposed at the lower portion and receives and fluidizes a bed of powder to form a powder cloud within the first chamber. An opening is disposed at the upper portion of the first chamber and directs at least one stream of the powder from the powder cloud out of the first chamber. An object holder is disposed above the opening and is configured to hold at least one of the objects at a position for intersecting the stream of powder.

Abstract: Apparatus for applying powder to objects, such as electric motor stators and permeable substrates. The apparatus includes a first chamber having upper and lower portions. A powder fluidizing bed is disposed at the lower portion and receives and fluidizes a bed of powder to form a powder cloud within the first chamber. An opening is disposed at the upper portion of the first chamber and directs at least one stream of the powder from the powder cloud out of the first chamber. An object holder is disposed above the opening and is configured to hold at least one of the objects at a position for intersecting the stream of powder.

Abstract: A fiber bundle workpiece is coated with a particulate material during passage about a plurality of pulleys arranged to establish a serpentine travel path portion through a coating zone. The pulleys have arcuate grooves extending thereabout, which cause the fiber bundle to twist axially, and the fibers of the bundle move with respect to one another as the fiber bundle moves along the serpentine path. These two actions increase coating efficiency and the penetration of particulate material into the fiber bundle. The travel path portion will preferably lie in a horizontal plane, and the coating unit will normally constitute an electrostatic fluidized bed of particulate material. After exiting the coating zone, the fiber bundle may pass through an oven to partially melt the particulate material, and thereby cause the particles to adhesively attach to the fiber bundle.