| 摘要 |
An apparatus for applying a coating of an atomizable material, such as a phosphor slurry, to the inside surface of a glass tube comprises a rotatable member having a surface for receiving material, a device for rotating the member and conduct for delivering material to the surface of the member. The rotating and delivery mechanisms are preferably situated along the same direction as the extension of the axis of rotation through the surface of the member. The apparatus may include a device for electrically charging the material prior to coating. A method for applying the coating of atomizable material to the inside surface of a glass tube comprises positioning a rotatable member within the tube, delivering the material to a surface of the member adapted to receive the material, and rotating the member at a predetermined velocity to atomize the material and inpact the surface of the tube with at least a portion of the atomized material. A potential differnce may be established between the atomized material and the surface of the tube to improve coating efficiency. The surface of the tube may be maintained at an electrical potential, and multiple coatings may be produced.
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