Device and method for coating serpentine fluorescent lamps

Details Device and method for coating serpentine fluorescent lamps Device and method for coating serpentine fluorescent lamps

2007-01-16

2007-01-16

Bashore, Alain L. (Department: 1762)

Coating processes

Direct application of electrical, magnetic, wave, or...

Magnetic field or force utilized

C427S064000, C427S157000, C427S230000

Reexamination Certificate

active

10741879

ABSTRACT:
A serpentine tube used in the manufacture of a fluorescent lamp is coated with a reflective or phosphor material. A magnetic material and coating material slurry is placed within one end of a serpentine glass tube. A magnet is placed adjacent the magnetic material and coating material slurry and is moved in a path conforming to the shape of the serpentine tube. The magnet causes the magnetic material and coating material slurry to travel along therewith, coating a portion of the interior surface of the serpentine tube with a reflective, phosphor, or other material. In another embodiment of the invention, abrasive magnetic material is placed within the serpentine lamp for removing a previously coated material resulting in an aperture being formed. The present invention is particularly suited to the manufacture of serpentine fluorescent lamps that are used to illuminate flat panel displays.

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patent: 5209946 (1993-05-01), Lowther et al.
patent: 5344667 (1994-09-01), Seder
patent: 5441774 (1995-08-01), Dutta et al.

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