MANUFACTURE OF FLUORESCENT LAMP AND FLUORESENT LAMP

摘要

PROBLEM TO BE SOLVED: To rigidly stick an alloy granule to the tube inside wall and reduce the average quantity and dispersion of a sealed mercury by applying radiation beam energy at a contact part with an alloy containing a sealed mercury and a glass tube and in the vicinity thereof. ;SOLUTION: Both ends of a straight tube shaped glass tube having a phosphor layer 2 on an interior wall face are sealed in a glass stem 3 having an electrode 4 and circular shaped by heating. After air is exhausted from an air exhaust tube 8 of one stem 3 not enclosed, an alloy granule 6 of zinc or the like and mercury and rare gas of a specified pressure are sealed and enclosed. Radiation beam energy is irradiated from an optical fiber 5 with an end 7 of a glass tube 1 where the alloy granule 6 is moved. Thereby, a part of the alloy granule 6 is fused, intruded into a ragged part on an interior wall face of the tube 1, and secured. It is preferable that the end 7 is preheated at a specified temperature before irradiation of radiation beams, and production efficiency is improved. Since the alloy granule 6 is sealed after being circularly molded, mercury is discharged during mold heating, and air is never exhausted by a air exhaust process.;COPYRIGHT: (C)1998,JPO