초록 ▼

A screw-on closure for bottles that initially works with an induction seal liner and provides a leak resistant reseal on the bottle after the liner is removed. The closure has a unique annular convex sealing surface that overlies the mouth of the bottle. The sealing surface and the closure body area

A screw-on closure for bottles that initially works with an induction seal liner and provides a leak resistant reseal on the bottle after the liner is removed. The closure has a unique annular convex sealing surface that overlies the mouth of the bottle. The sealing surface and the closure body area supporting it are sufficiently massive to withstand the heat generated in an induction liner sealing process and have a geometry that promotes a line contact with the mouth of the bottle to ensure a drip resistant reclose. A dispensing aperture of the cap is sealed by a hinged flap that has its sealing surface areas strategically located relative to the hinge to ensure repeated drip free opening and closing dispensing operation.

대표청구항 ▼

[ What is claimed is:] [1.] An injection molded thermoplastic screw-on dispensing cap comprising an internally threaded skirt, an end wall integral with the upper end of the skirt, a dispensing aperture in the end wall, a member for selectively opening and closing the aperture to respectively allow

[ What is claimed is:] [1.] An injection molded thermoplastic screw-on dispensing cap comprising an internally threaded skirt, an end wall integral with the upper end of the skirt, a dispensing aperture in the end wall, a member for selectively opening and closing the aperture to respectively allow or prevent dispensing of the contents of a bottle on which the cap is threaded, the end wall including an annular sealing surface having a radial width that is about the same size as a nominal wall thickness of the cap and being adapted to overlie an edge of a mouth of the bottle, the sealing surface being generally convex across its radial width, the sealing surface having the general shape of a truncated torroid and having sufficient mass and heat transfer characteristics to resist substantial permanent deformation during an induction heating process while it presses an induction seal liner carried in the cap onto the edge of the mouth of a bottle and its convex shape forms a line contact circumferentially continuous seal with the edge of the mouth of the bottle when the liner is removed and the cap is reinstalled to ensure a drip resistant seal therewith upon application of moderate reclosing torque.