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US 5,927,525 AGranted
Multi-layer containers and preforms
AssigneePlastipak Packaging, Inc.
InventorsRichard C. Darr, Michael C Kitzmiller
Life of this patent
Estimating the term…
Abstract
A multi-layer preform for forming multi-layer containers includes an extruded inner barrier layer, said inner layer having an upper portion adapted to be formed into an upper portion of a container, an intermediate portion adapted to be formed into an intermediate portion of a container, an extruded and a base portion adapted to form a base portion of a container. The preform includes an outer injection molded layer.
Claims20
A multi-layered preform for blow molding a container which comprises:
- an extruded inner layer forming a cavity and defining an upper portion adapted to be formed into an upper portion of a container and including an access opening therein, an intermediate portion adapted to be formed into an intermediate portion of the container, and a closed base portion adapted to be formed into a base portion of the container;
- an outer injection molded layer located substantially adjacent the inner layer and coextensive therewith and comprising the major portion of the preform;
- and wherein the inner layer comprises at least two layers, with the innermost first layer extending over the entire upper portion, the intermediate portion and the base portion, and the intermediate second layer comprising an oxygen barrier layer extending from above the closed base portion to below the access opening, wherein the innermost first layer and the outer injection molded layer both extend above the intermediate barrier layer to the access opening and below the intermediate barrier layer to the closed base portion.
A multi-layered container, which comprises:
- an extruded inner layer forming a cavity and defining an upper portion including an access opening therein, an intermediate portion and a closed base portion;
- an outer injection molded layer located substantially adjacent the inner layer and coextensive therewith and comprising the major portion of the container;
- wherein the inner layer comprises at least two layers, with the innermost first layer extending over the entire upper portion, the intermediate portion and the base portion, and the intermediate second layer comprising an oxygen barrier layer extending from above the closed base portion to below the access opening, wherein the innermost first layer and the outer injection molded layer both extend above the intermediate barrier layer to the access opening and below the intermediate barrier layer to the closed base portion.
Dependencies are inferred from the claim text.