Abstract: Method and apparatus for the preparation of hollow plastic articles wherein an improved injection blow molding process is obtained and improved temperature control of the parison is obtained by the use of a plurality of molds and cores. At least one temperature controlled mold and core is used to adjust the temperature of the parison. The temperature adjusted parison is then stretched and/or blown in at least one second mold by a second core, cooled therein and transferred by at least one third ejector core to additional finishing molds for further cooling or to removal means.

Abstract: Method and apparatus for the preparation of hollow plastic articles wherein improved temperature control of the parison is obtained by altering the heat content of a parison by a first, temperature controlled mold and core, transferring the parison to a second, temperature controlled mold, and substantially equalizing the temperature distribution of the parison by heat exchange with the second mold.

Abstract: A method and apparatus for forming hollow objects of moldable organic plastic material by providing a parison on a blow core, locating said blow core bearing said parison in a blow mold, expanding said parison within said blow mold, separating said expanded parison from said core while the parison remains in said blow mold and transferring said expanded parison from said blow core within said blow mold to another core and/or blow mold. In a preferred embodiment, a plurality of cores and molds are employed to provide an extended cooling sequence for the final article.

Abstract: Plastic articles and apparatus for making the same in which a preformed sleeve is placed over a core, a parison is injected around the core and sleeve in a parison mold and the parison is blown in a blow mold together with the sleeve.

Abstract: A multilayered hollow plastic container having improved resistance to permeation by unwanted gases, especially injection blow molded containers having a preformed inner lining which is applied to a core prior to the formation of the composite parison. One layer is a barrier plastic having substantial but incomplete resistance to gas permeation, and another layer contains a getter material capable of binding unwanted gas uniformly dispersed throughout.

Abstract: A method of making multilayered hollow plastic containers having improved resistance to permeation by unwanted gases, especially injection blow molded containers having a preformed inner lining which is applied to a core prior to the formation of the composite parison. One layer is a barrier plastic having substantial but incomplete resistance to gas permeation, and another layer contains a getter material capable of binding unwanted gas uniformly dispersed throughout. The resultant improved container is characterized by having improved resistance to gas permeation.

Abstract: Composite plastic containers and method for making the same in which a preformed sleeve is caused to expand with a plastic layer in the course of an injection blow molding operation and to adhere, upon expansion, to said plastic layer due to atmospheric pressure acting on the inside of said sleeve without an opposing pressure on the outside thereof.

Abstract: A method for obtaining a multilayered, hollow plastic article having side walls which are oriented in the axial, radial and tangential directions. Plastic material is injection molded about a liner covered core to form a multilayered parison which is then transferred on the core to first and second blow molds for blow molding to a hollow article. A parison mold and core are maintained in axial alignment and the liner and blow molds are moved therebetween for engagement with the core.

Abstract: A materials composite having improved resistance to permeation by unwanted substances, especially gas permeation. The composite includes a first layer of a barrier having partial resistance to permeation and a second layer adhered to the first layer. The composite includes a uniformly dispersed getter material capable of absorbing unwanted substance permeating through the barrier.

Abstract: Method and apparatus for the preparation of oriented hollow objects of moldable organic plastic material by providing a parison on a first blow core, expanding said parison into an intermediate shape, as by pre-expanding it, transferring said pre-expanded parison to a second blow core, finally extending and expanding said parison to form said hollow object in finished shape.

Abstract: A filled, fluid barrier resistant plastic container is obtained wherein the container is exposed to a temperature in excess of 175.degree. F., as for example being filled with a material maintained at said elevated temperature. A multilayered, hollow plastic container is provided having outer and inner portions of thermoplastic materials resistant to temperatures in excess of 175.degree. F., and a barrier layer of thermoplastic material between the outer and inner portions. The container may be filled with a material at a temperature in excess of 175.degree. F. but below the temperature of resistance of the inner and outer layers whereby the barrier layer softens or melts, and the filled container is cooled to ambient temperature whereby the barrier layer reforms in place to provide the filled, barrier resistant container of the present invention.

Abstract: A method for making composite plastic containers in which a preformed sleeve is caused to expand with a plastic layer in the course of an injection blow molding operation and to adhere, upon expansion, to said plastic layer due to atmospheric pressure acting on the inside of said sleeve without an opposing pressure on the outside thereof.

Abstract: A method and apparatus for the production of plastic containers, especially injection blow molded containers having a preformed inner lining which is applied to the blow core prior to formation of the composite parison. The temperature of the blow core is adjusted prior to application of the lining so that it is suitable for receiving and heating said lining.

Abstract: A method and apparatus for forming hollow objects of moldable organic plastic material by providing a parison on a blow core, locating said blow core bearing said parison in a blow mold, expanding said parison within said blow mold, separating said expanded parison from said core while the parison remains in said blow mold and transferring said expanded parison from said blow core within said blow mold to another core and/or blow mold. In a preferred embodiment, a plurality of cores and molds are employed to provide an extended cooling sequence for the final article.

Abstract: Method and apparatus for the preparation of oriented hollow objects of moldable organic plastic material by providing a parison on a first blow core, expanding said parison into an intermediate shape, as by pre-expanding it, transferring said pre-expanded parison to a second blow core, finally extending and expanding said parison to form said hollow object in finished shape.

Abstract: A multilayered, hollow plastic container having resistance to elevated temperatures and barrier resistance, and a method for providing same. The container has an outer first portion of a material resistant to temperatures in excess of 175.degree. F., an inner second portion of a material resistant to temperatures in excess of 175.degree. F. and a third portion barrier layer of a thermoplastic material between said first and second portions. Also, a multilayered plastic sheet material having resistance to elevated temperatures and barrier resistance.

Abstract: An improved method of transferring liners to a blow core in a method of making a composite plastic article wherein a plastic parison is formed in a parison mold around and in conformity with a blow core, the parison, sleeve and core being subsequently confined in a blow mold and expanded therein. In accordance with a method of preparing composite liners, scrap produced in the preparation thereof may readily be reclaimed.

Abstract: A method of making lined, hollow plastic articles wherein a parison is formed on a core in a parison mold by molding plastic around the core in a parison mold cavity and subsequently expanding the parison in a blow mold. A preformed plastic sleeve is formed on the core prior to molding plastic around the core in the parison mold cavity.