| 摘要 |
To provide a halogen incandescent bulb with controlled variation in wall thickness of the bulb, a bulb tube (20) first has a cup region (26) formed thereon. The cup region, by radial application of force, for example by rollers (22), is constricted, and the constriction then pulled to form a small, closed projecting tip (19). Mold jaws (27) then mold the shape of the bulb; the mold jaws are formed with a cavity (29') to receive the projecting tip (19) which, then, has the end cut off to provide an attachment cannula (30) for the pumping tube (32). The pumping tube is melted on the nipple (29) of the cup (26) of the bulb. A filament mount (8) with filaments (9) is then introduced, and pinch jaws (35) pinch-seal the filament mount in the bulb and finish-shape the bulb. The bulb can then be flushed, evacuated, and filled with the requisite halogen containing fill through the pumping tube (32), which then is tipped off.
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