Press and blow glass forming
AssigneeCorning Glass Works
InventorsJohn J. Scholl, Warren D. Staley
Life of this patent
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Abstract
A method is disclosed for pressing and blowing a hollow article wherein a soft blank having a cavity is press formed which may require only minimal surface reheating prior to the blowing of such blank into a finished hollow article. At the completion of the press forming, the core temperature of the soft blank is substantially equal to the delivery temperature of the charge from which the soft blank is formed.
Claims12
A method of forming a thin walled lightweight hollow glass article which comprises, delivering a charge of molten glass to a parison mold, rapidly press forming said charge to form a soft blank having a cavity formed therein, minimizing the amount of heat extracted from said molten charge during said press forming so that at the completion of said press forming the core temperature of the soft blank is substantially equal to the delivery temperature of said charge, controllably developing said soft blank, and blowing said developed blank into a finished lightweight hollow glass article having relatively thin walls.
A method of pressing and blowing a parison to form a hollow glass article wherein the necessity for reheating the pressed parison surface prior to blowing is minimized which comprises, delivering a charge of molten glass into a cavity of a parison mold, relatively positioning a neck ring about the cavity adjacent said mold, rapidly press forming said charge of molten glass into a soft parison having a cavity formed therein, minimizing glass to metal contact time during the loading and pressing of said soft parison to reduce the amount of heat extracted from said charge of molten glass, maintaining the core temperature of said soft parison at the completion of said press forming substantially equal to the delivery temperature of said molten charge, suspending said soft parison from said neck ring, elongating said parison, and blowing said elongated parison into a finished hollow glass article.
Dependencies are inferred from the claim text.