METHOD OF APPLYING PROTECTIVE COATING ON LAMP ENVELOPE

摘要

METHOD OF APPLYING PROTECTIVE COATING ON LAMP ENVELOPE 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.