Blowhead for use in the manufacture of glass containers
AssigneeEmhart Industries, Inc.
InventorThomas V. Foster
Life of this patent
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Abstract
A blowhead (10; 100) for blowing air through a neck opening (12; 112) of a glass parison (14; 114) to cause it to expand. The blowhead defines an air supply passage (28; 128) through which air can enter the parison and an exhaust passage (45; 145) through which air can exhaust from the parison. The cross-sectional area, transversely to the direction of air flow, of at least a portion of the exhaust passage is adjustable.
Claims10
A blowhead for use in the manufacture of glass containers for blowing air through a neck opening of a glass parison positioned in a cavity of a mould to cause the parison to expand to the shape of the cavity, the blowhead comprising a body defining an air supply passage through which, when the blowhead is positioned on the mould, air can enter the parison, and an exhaust passage through which air can exhaust from the parison, and means for adjusting the cross-sectional area, transversely to direction of air flow, of at least a portion of the exhaust passage, said body including first and second body portions which are screw-threadedly engaged with one another so that rotation of one portion relative to the other serves to adjust said cross-sectional area.
Dependencies are inferred from the claim text.