Patent ID: 7014055
Filing Date: 2006-03-21
Classification: B65D,Y10S

Abstract:
1. A synthetic resin container closure for closing a container having a mouth-neck portion with an internal diameter D 4 , said container closure comprising: a circular top panel wall; a cylindrical skirt wall extending downwardly from the peripheral edge of the top panel wall and formed from a synthetic resin as a single unit with the top panel wall; an outer cylindrical sealing protrusion extending downwardly from the inner surface of the top panel wall; an inner cylindrical sealing protrusion extending downwardly from the inner surface of the top panel wall and having a maximum external diameter D an annular sealing ridge located between the outer cylindrical sealing protrusion and the inner cylindrical sealing protrusion and projecting downwardly from the inner surface of the top panel wall, wherein: 0.25 mm≦(D the inner peripheral surface of the outer cylindrical sealing protrusion extends downwardly with an outward inclination at an angle θ the outer peripheral surface of the inner cylindrical sealing protrusion extends downwardly with an outward inclination at an angle θ the inclination angle θ the inner peripheral surface of the inner cylindrical sealing protrusion extends downwardly with an outward inclination at an angle θ the inclination angle θ the thickness of the inner cylindrical sealing protrusion gradually decreases as the inner cylindrical sealing protrusion extends downwardly from the inner surface of the top panel wall.