Patent ID: 8672183
Filing Date: 2014-03-18
Classification: B65D

Abstract:
1. A thin walled collapsible container, the container comprising an outlet end, a closed base end, a front wall, a rear wall and two side walls, the container closed but for an opening from the outlet end, the outlet end having a top wall with a generally rectangular perimeter as seen in end view, the top wall including an annular central portion about an axially extending neck open to the opening and peripheral edge portions about the central portion merging with the front, rear and two side walls, the front, rear and two side walls extending longitudinally of the container from the outlet end to the base end about a longitudinal of the container parallel an axis coaxially through the neck, a flat central plane is disposed intermediate the side walls, the longitudinal lies in the flat central plane, the container symmetrical about the flat central plane, the base end having a bottom wall with a generally rectangular perimeter as seen in end view, the bottom wall including a central portion and peripheral rounded edge portions about the central portion merging the central portion into the front, rear and two side walls, the base end having support portions of the peripheral rounded edge portions of the base end disposed in a flat plane normal to the longitudinal of the container and serving to support the container on a horizontal support surface with the longitudinal of the container to extend vertically upwardly, the front wall and rear wall each carrying a respective front and rear valley having left and right valley side walls extending centrally into each front and rear valley toward a respective other of the rear and front wall to a respective front and rear valley apex each extending longitudinally of the container in the flat central plane from an outlet end of the respective front and rear valley apex to a base end of the respective front and rear valley apex, each of the front and rear valley ending longitudinally in a respective front and rear valley outlet end valley end wall which bridges between the right and left valley side walls of its respective front and rear valley, the front and rear outlet end valley end wall being located between its respective front and rear valley and the outlet end, each of the front and rear valley ending longitudinally in a respective front and rear valley base end valley end wall which bridges between the right and left valley side walls of its respective front and rear valley, the front and rear base end valley end wall being located between its respective front and rear valley and the base end, each valley end wall presenting a surface symmetrical about the flat central plane about its respective outlet end or base end of its front and rear valley apex, wherein on collapsing of the container under a vacuum applied to withdraw fluid from the opening the side walls are drawn together towards the flat central plane with the front and rear walls folding about the front valley apex and the rear valley apex, the base end having a three dimensional structure formed by its bottom wall, central portion and peripheral edge portions sufficiently strong to resist deflection and maintain its support portions in a flat plane on collapsing of the container wherein the surface of each valley end wall extends 180 degrees about its respective outlet end or base end of its front and rear valley apex.