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US 4,339,258 AGranted
Method for blow molding and cooling hollow glassware
AssigneeVitro Tec Fideicomiso
InventorJohn K. Martin
Life of this patent
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Abstract
A method of blow molding hollow ware in a paste mold machine includes positioning a blow nozzle in spaced non-sealed relation to the neck ring. During the blowing portion of the molding cycle, air is continuously flowed into and out of the ware so as to simultaneously cool and shape the ware.
Claims1
A method of blow molding hollow glassware comprising:
- pressing a preform in a parison mold with a controlled pressure plunger and thereafter supporting said preform by a rotatable neck ring within a closed blow mold;
- positioning a nozzle in aligned but non-sealed spaced relation to said neck ring;
- and
- forming said preform into ware having the shape of said blow mold by forcing air through said nozzle into the interior of the ware while permitting air to exit from the ware through the space between said nozzle and said neck ring to simultaneously shape and internally cool the ware.
1 more element
Dependencies are inferred from the claim text.