Glass bulb blow-molding apparatus

Claim 1

In a glass bulb blow-molding apparatus having a platelike device including orifice plates having means therein defining orifices for conveying semimolten glass in ribbon form, a blowhead device including blowheads mounted for movement along a path of travel over the glass ribbon for blow-molding said glass, a mold-link device including molds and operating in synchronism with said blowhead device, and a first compressed air-storage vessel for supplying compressed air for blow-molding, the combination with said orifice plates, blowheads, molds, and compressed air-storage vessel of a second compressed air storage vessel and a vacuum tank interposed between said first and second compressed air storage vessels, said vessels and tank being consecutively aligned in a row along said path of travel with said second vessel disposed upstream from said tank, said second vessel supplying compressed air for initially blowing parisons from said glass through respective orifice-plate orifices, said vacuum tank being position to evacuate each parison to effect contraCtion of the neck portion thereof for unobstructed entrance into a mold, and said first vessel being positioned downstream from said vacuum tank to supply compressed air for final blowmolding of a glass bulb from each parison in the molds.