Patent ID: 8978909
Filing Date: 2015-03-17
Classification: B65D

Abstract:
1. A closure device for a container, which seals an opening that opens at the top of a container and has a rim on its periphery, comprising: a seal member that covers the opening and which has rubber elasticity, said seal member including a flange that is mounted on the upper surface of the rim, said flange containing a compressible projection that projects upwardly from the upper surface of the flange and is annularly arranged in contact with and disposed along an outer circumference of the flange in planar view; and a lid member connected to a cap body and adapted to press and thereby hold the seal member on the upper surface of the rim, said cap body containing a top wall and a cylinder part that extends down from the outer circumference of the top wall, and an annular locking member disposed along the inner surface of the cylinder part and containing a locking part that engages and locks with an under surface of the rim when the lid is pushed down, said annular locking member further provided with longitudinally disposed stabilizers, whereby a diameter of a virtual circle that passes through the inner edges of each stabilizer is set at about the same as the outer diameter of the rim, or slightly smaller than the outer diameter of the rim, and wherein the cap body further contains a receiving projection which projects downward from an annular part on the under side surface of the top wall, said annular part having an inner diameter that is larger than that of the opening and an outer diameter that is smaller than that of the flange of the seal member; and wherein at least part of the compressible projection is positioned radially outward relative to the receiving projection.