Container closure and method for manufacture thereof

Details Container closure and method for manufacture thereof Container closure and method for manufacture thereof

B - Operations, Transporting

29

C

18/52

B29C 45/44 (2006.01) B65D 41/18 (2006.01)

Patent

CA 1315931

25,950 ABSTRACT OF THE DISCLOSURE A container closure comprises a cylindrical molded uni- tary member defining a top panel and a skirt depending from the top panel to an open end for securement to the container, the skirt being interiorly tapered at the open end. The taper begins flush with the outer surface of the skirt and ends in a first circum- ference extending radially of the central axis of such cylinder. The skirt further defines a bead extending radially interiorly of the skirt to a second circumference radially closer to the cylinder central axis than the first circumference. The closure provides sealing retention pressure in accordance with the radially interior extent of the bead and exhibits evidence of an initial removal from the container. In one embodiment, the bead is generally of semi- spherical configuration and flow passages may exist in the bead, preferably over less than the hemispherical extent thereof. The method for making the closure involves the use of a stripper plate to participate in part in defining a mold cavity.

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