Liner and preform
AssigneePlastipak Packaging, Inc.
InventorRichard C. Darr
Life of this patent
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Abstract
An improved multi-layer preform is provided which includes: (a) a plastic inner liner, having a cylindrical-walled lower portion and a cylindrical-walled upper portion integral with and extending upwardly from said lower portion, and (b) a molded outer layer. The liner further includes (a) a mount means, such as a generally continuous annular groove, or (b) a vent means, such as a plurality of recesses or grooves positioned circumferentially about the upper portion of the liner, or (c) both a mount means and vent means used in functional combination.
Claims22
A plastic multi-layered preform for manufacturing a blow molded container, comprising:
- an inner liner having a closed bottom portion, a lower portion integral with and extending upwardly from said bottom portion, and a substantially cylindrical upper portion integral with and extending upwardly from the lower portion, the upper portion having an open neck and an upper rim;
- the liner further includes an interior surface, an exterior surface, and a mount means to facilitate engagement of the liner to a male mold portion;
- and
- a molded outer layer substantially adjacent to the plastic inner liner.
A plastic multi-layered preform for manufacturing a blow molded container, the preform including an inner liner having a closed bottom portion, a lower portion integral with and extending upwardly from said bottom portion, and a substantially cylindrical upper portion integral with and extending upwardly from the lower portion, the upper portion having an open neck and an upper rim;
- the liner further includes an interior surface, an exterior surface, a longitudinal central axis, and at least one vent means recessed into the interior surface of the liner to permit the escape of gas from the interior of the liner when an external part engages the interior surface of the liner;
- and
- a molded outer layer substantially adjacent to the plastic inner liner.
Dependencies are inferred from the claim text.