초록 ▼

A composite plastic container is formed by blow molding a body from a plastic parison into a base having a bottom, side walls and an open top, which includes an upper annular edge. A peripheral shoulder defines the upper portion of the body. The double side walls and bottom are relatively thick for

A composite plastic container is formed by blow molding a body from a plastic parison into a base having a bottom, side walls and an open top, which includes an upper annular edge. A peripheral shoulder defines the upper portion of the body. The double side walls and bottom are relatively thick for strength and stability; the bottom also including a substantially solid rim in alignment with the annular edge for enhanced stability. A central opening in the bottom forms a plastic plug to anchor the bottom to the base. The lip of the shoulder mates and substantially covers the annular edge forming a smooth, rounded interface in the preferred embodiment. The peripheral lip can mate in other ways with the annular edge. Other features include an insert label and a protrusion in a side wall to form a window. In the related method, the steps in the broadest sense include placing the base into a mold, inserting the plastic parison through the open top of the base, blow molding the parison to form a container body and controlling the molding step so as to form a peripheral shoulder mating with the annular edge.

대표청구항 ▼

[ What is claimed is:] [1.]1. A composite container formed at least in part by blow molding from a plastic parison with biaxial stretching, comprising:a molded base having a bottom, side walls and an open top forming an annular edge;a plastic container body formed from said parison extending into sa

[ What is claimed is:] [1.]1. A composite container formed at least in part by blow molding from a plastic parison with biaxial stretching, comprising:a molded base having a bottom, side walls and an open top forming an annular edge;a plastic container body formed from said parison extending into said base through the open top, said plastic container body being formed juxtaposed to said bottom and sidewalls of said molded base, wherein the bottom of said base includes a central opening for receiving and forming a plug from said parison to anchor said bottom during forming of said body;a peripheral shoulder defining the upper portion of the plastic container body and mating with said edge,whereby said composite container includes thick double side walls and bottom for strength and stability, and a relatively thin shoulder.