Self-closing closures

Details Self-closing closures Self-closing closures

1975-04-01

1976-09-21

Knowles, Allen N.

Dispensing

Outlet element operated by pressure of contents

Spring form, resilient or compressible flow controller or...

B65D 3550

Patent

active

039814190

ABSTRACT:
A self-closing closure comprises two annular parts intended to be snapped together one of said parts being integral with a conical diaphragm having a central sleeve-shaped part with a discharge opening whereas the other one has radial spokes ending in a central part from which a stem projects. The end of said stem normally fills the opening of the sleeve and, to obtain an improved discharge function the end of the stem is substantially cylindrical and continues in a slightly conical part whereas the discharge opening has a cylindrical end portion smoothly continuing inwardly in a conical portion the inner envelope surface of the discharge opening being convex to establish a linear contact with the conical part of the stem. The end portion of the stem may be tubular.

REFERENCES:
patent: 1925925 (1933-09-01), Kunkel
patent: 2002723 (1935-05-01), Voke et al.
patent: 2556571 (1951-06-01), Bobbs et al.
patent: 3412910 (1968-11-01), Hahn

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