Method of applying protective coating on lamp envelope

Details Method of applying protective coating on lamp envelope Method of applying protective coating on lamp envelope

C - Chemistry, Metallurgy

03

C

204/91.33

C03C 17/32 (2006.01) B05D 1/30 (2006.01) F21K 5/08 (2006.01)

Patent

CA 1122155

METHOD OF APPLYING PROTECTIVE COATING ON LAMP ENVELOPE ABSTRACT OF THE DISCLOSURE A method of applying a protective light transmitting coating on the exterior surface of the glass envelope of a lamp, the method comprising: holding the lamp with its longitudinal axis disposed horizontally and rotating the lamp about its longitudinal axis; dispensing a liquid coating material onto the rotating lamp envelope from a dispensing means located above the lamp; and allowing the envelope coating to be cure-hardened, such as by irradiation. The method is particularly useful for applying an optically clear photopolymer coating on the glass envelope bf a photoflash lamp and curing the coating by irradiation with a source of ultraviolet light.

325520

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