초록 ▼

A plastic body is provided for use in a container which is adapted to hold product under vacuum, without undesirable deformation of the container. The body has a curvilinear bulge at the base of its cylindrical sidewall, and the bulge is dimensioned and configured to permit its slight deflection und

A plastic body is provided for use in a container which is adapted to hold product under vacuum, without undesirable deformation of the container. The body has a curvilinear bulge at the base of its cylindrical sidewall, and the bulge is dimensioned and configured to permit its slight deflection under vacuum which, in turn, facilitates upward movement of the bottom wall of the body. These changes effect a reduction of volume within the body, thereby reducing the level of vacuum which forms therewithin. The characteristics of the body render it particularly well-suited for production in relatively small sizes, utilizing relatively rigid synthetic resinous materials. It is also especially adapted for use in connection with a metal end closure, which may be hermetically sealed thereonto.

대표청구항 ▼

A body for a container adapted when closed to hold a product under vacuum without substantial deformation of the body and without unwanted ingress of oxygen into the body, comprising, an elongated tubular sidewall merging at one end into a bottom wall closing said one end, and merging at the other

A body for a container adapted when closed to hold a product under vacuum without substantial deformation of the body and without unwanted ingress of oxygen into the body, comprising, an elongated tubular sidewall merging at one end into a bottom wall closing said one end, and merging at the other end thereof into means for hermetically securing a closure thereto for closing said other end, said sidewall and bottom wall being integrally formed from synthetic resinous material, said sidewall and bottom wall having a high resistance to the permeability of oxygen, said sidewall throughout a substantial and major portion of its axial length extending from said other end having substantial rigidity and resistance to inward deformation in response to internal vacuum, said sidewall along the remaining portion of its axial length adjacent said one end, and, said bottom wall thereat together having sufficient flexibility for limited deformation in response to internal vacuum thereby to permit said bottom wall to deform axially inwardly of said tubular sidewall as the edge of said sidewall at said one end deflects radially inwardly, and the remaining sidewall portion between said edge and its juncture with said major sidewall portion, deforms to bulge slightly outwardly relative to said edge, whereby said body can achieve a diminished container volume to lower the vacuum level therewithin.