Invention Grant
US5162055A Bulb forming orifice plate for bulb making apparatus 失效
灯泡制造装置的灯泡形成孔板

Bulb forming orifice plate for bulb making apparatus
Abstract:
An orifice plate for a glass ribbon machine has an orifice provided with a side wall having a continuously variable angle. When used for making envelopes for incandescent lamps, the plate provides stronger bulbs.
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