Coating processes – Electrical product produced – Fluorescent or phosphorescent base coating
Reexamination Certificate
2003-11-14
2009-08-11
Talbot, Brian K (Department: 1792)
Coating processes
Electrical product produced
Fluorescent or phosphorescent base coating
C427S106000
Reexamination Certificate
active
07572479
ABSTRACT:
A method and apparatus for coating the glass envelope and portions of the end caps of fluorescent light tubes in a continuous and sequential manner with a thermo-plastic material. The coating is applied by a cross head extruder through which the light tubes are sequentially fed. A vacuum applied during the coating process promotes direct and intimate contact between the coating and the light tubes. The end caps may be heated prior to coating to ensure adherence of the coating to the end caps and not to the glass envelope. Post-coating processes include cooling the coating, severing individual light tubes from the chain of sequentially coated light tubes, and readying the coated light tubes for packaging. The method is automatic, with the apparatus being automatically controlled by a control unit.
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Cannon Mark
Nolan Robert J.
K&L Gates LLP
Shat-R-Sheild
Talbot Brian K
LandOfFree
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