US 5,176,293 AGranted

Dispenser with removable unitary cap and threadable overcap

AssigneeAutomatic Liquid Packaging, Inc.

InventorGerhard H. Weiler

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Abstract

A douche or enema dispenser is provided as a unitary hermetically sealed container and a cooperating overcap. The container has a cap structure which is removable by torsion applied through the overcap positioned over the cap structure, engageable with the adjacent container neck portion, and simultaneously rotatable as well as axially movable relative thereto. As the overcap is rotated relative to the neck portion, ribs in the overcap engage tip portions of a wing member associated with the cap structure. Since the cap structure is mounted over and sealed about a frangible web located around the container mouth that is located at the distal end of the neck portion, when sufficient torsion develops, the web is fractured, the cap is removed, and the container is opened. In opening the container, force upon walls of the liquid-filled body portion of the container is minimized.

Claims11

Dependent claims

A dispenser comprising, in combination, a hermetically sealed unitary container having a removable but unitary cap and a cooperative elongated, rotatable and axially movable overcap means for said cap;

said container including a body portion, a neck portion with circumferentially extending external thread means, and a closure portion at the distal end of said neck portion;
said closure portion including said unitary cap, a frangible web between said cap and said neck portion, and wing means extending from said cap;
said overcap means being positioned over said closure portion and said neck portion and including internal thread means engageable with said neck portion thread means and longitudinal internal rib means engageable with said wing means;
said unitary cap being spaced from said external thread means on said neck portion along a distance at least as great as the longitudinal length dimension of the internal thread means in said overcap means;
whereby rotational threading movement of said overcap means relative to said neck portion fractures said frangible web.

2 more elements

Dependencies are inferred from the claim text.