Method and apparatus for coating fluorescent lamp tubes

Details Method and apparatus for coating fluorescent lamp tubes Method and apparatus for coating fluorescent lamp tubes

Category

H - Electricity

Subcategory

01

Subsubcategory

J

CPC

117/20, 117/71,

IPC codes

H01J 9/22 (2006.01) C07D 417/12 (2006.01) C07D 513/00 (2006.01) C07D 513/04 (2006.01)

Type

Patent

Patent number

CA 1299450

Description

LD 9325 METHOD AND APPARATUS FOR COATING FLUORESCENT LAMP TUBES ABSTRACT OF THE DISCLOSURE Method and apparatus for electrostatically applying phosphor coatings to the interior surface of fluorescent lamp tubes includes equipment for applying an electrical charge of one polarity to the glass wall and electrical charge of the opposite polarity to the phosphor particles to cause the phosphor particles to adhere to the glass surface until the particles can be heated to bond them to the interior surface of the glass by lehring. By using electrostatic deposition the lehring may be done at a lower temperature than is required with conventional phosphor deposition using organic binders so that U-shaped fluorescent lamps do not experience distortion from the lehring temperature.

Application Number

510399

Affiliated with

Also associated with

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