Container
AssigneeAmerican Can Company
InventorsDonald C. Vosti, Alan Silverman
Life of this patent
Estimating the term…
Abstract
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.
Claims20
A body for a container which is adapted, when closed, to hold a product under vacuum, comprising a sidewall and a bottom wall integrally formed as a single piece from a relatively rigid synthetic resinous material, said sidewall being generally cylindrical with an open upper end, having means adjacent said upper end for hermetically securing a closure thereto and having, at the juncture with said bottom wall, a bulge of curvilinear cross-section, taken longitudinally through said sidewall, said bottom wall closing the lower end of said sidewall and being of circular configuration, said body having an angular, downwardly-directed circumferential edge at said juncture and extending about said bottom wall, said material in said bulge being thinner than that in the remainder of said sidewall and said material in the portion of said bottom wall adjacent said circumferential edge being thinner than said material of said bulge so that, upon hermetic sealing of said body and development of a substantial vacuum within the resultant container, at least a portion of said bulge may deform, to permit upward movement of said bottom wall, to thereby diminish the volume of the container and hence the vacuum level therewithin.
A package including:
- a body comprising a sidewall and a bottom wall integrally formed as a single piece from a relatively rigid synthetic resinous material, said sidewall being generally cylindrical with an open upper end, having means adjacent said upper end for hermetically securing a closure thereto and having, at the juncture with said bottom wall, a bulge of curvilinear cross-section, taken longitudinally through said sidewall, said bottom wall closing the lower end of said sidewall and being of circular configuration, said body having an angular, downwardly-directed circumferential edge at said juncture and extending about said bottom wall, said material in said bulge being thinner than that in the remainder of said sidewall and said material in the portion of said bottom wall adjacent said circumferential edge being thinner than said material of said bulge so that upon hermetic sealing of said body and development of a substantial vacuum within the resultant container, at least a portion of said bulge may deform, to permit upward movement of said bottom wall, to thereby diminish the volume of the container and hence the vacuum level therewithin;
- a closure hermetically secured to said upper end of said sidewall and closing said body;
- and a product contained therewithin.
Dependencies are inferred from the claim text.