Method and apparatus for forming stretch blow molded containers
AssigneeGraham Packaging Company, L.P.
InventorsKent Goss, Paul Kelley, Scott Bysick, Philip Sheets
Life of this patent
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Abstract
The present invention relates to a base assembly (100) for forming a base portion of a plastic container. The base assembly comprises a base pedestal (104), a base mold attached to the base pedestal, a push rod (102) movable between a first position and a second position with respect to the base mold to reposition a portion of the plastic container, and an activation mechanism adapted to move the push rod between the first position and the second position.
Claims8
A method of stretch blow molding a plastic container, comprising:
- (a) enclosing a parison within a mold cavity of a blow mold within a stretch blow molding system, the blow mold comprising a side mold assembly and a separate base plug including a base mold defining a contact surface to form a shape of at least a part of a base portion of a plastic container, the contact surface including a cavity, an outer surface and an end surface of a push rod, the cavity being recessed relative to the end surface of the push rod, wherein the push rod extends through the base plug;
- (b) inflating the parison within the mold cavity to form a blow molded container having a movable region using the method of stretch blow molding;
- and
- (c) moving a portion of the blow mold to reposition the movable region while the blow mold container is in the mold cavity by moving the push rod from a first position to a second position so as to reposition the movable region from an outwardly protruding position toward an inwardly protruding position.
A method of stretch blow molding a plastic container, comprising:
- (a) enclosing a parison within a mold cavity of a blow mold within a stretch blow molding system defining the mold cavity, the blow mold comprising a side mold assembly and a separate base plug including a base mold defining a contact surface to form a shape of at least a part of a base portion of a plastic container, the contact surface including a cavity, an outer surface and an end surface of a push rod, the cavity being recessed relative to the end surface of the push rod, wherein the push rod extends through the base plug;
- (b) inflating the parison within the mold cavity to form a blow molded container having a movable region using the method of stretch blow molding;
- and
- (c) moving a portion of the blow mold to reposition the movable region while the blow mold container is in the mold cavity by moving the push rod from a first position to a second position so as to reposition the movable region from an outwardly protruding position toward an inwardly protruding position.
Dependencies are inferred from the claim text.