Patent ID: 7287662
Filing Date: 2007-10-30
Classification: B65D

Abstract:
1. A closure plug for containers comprising a bottom wall and a cylindrical sidewall, said sidewall formed with a relatively sharp external helical screw thread and a circumferentially enlarged rim having an annular undersurface, an annular inclined conical gasket seat immediately under said plug rim flaring straight radially outwardly and upwardly from a lowermost minimum diameter to an uppermost maximum diameter, a radially outwardly extending gasket retaining lip separate from and below said plug gasket seat interposed said gasket seat and said sidewall thread extending in a plane parallel to said undersurface of said plug rim, said gasket retaining lip having a separate uniform substantially continuous upwardly and outwardly facing annular surface and a substantially constant radial extension greater than said gasket seat minimum diameter and less than the outside radial extension of the crest of said sidewall thread thereby creating a uniformly constant gasket seat and separate retaining lip geometry substantially throughout 360 degrees so as to retain said gasket on said separate straight conical gasket seat during threaded insertion and removal of said plug.