| 摘要 |
<p>The present invention is directed to a metered dispensing cap system for containers such as tubes and the like. The system has a base element (5) which is attachable to the neck of a squeezeable container and which has a sidewall portion (23) and a top (7). The base element has an opening (8) in the top for outflow of a material from a squeezeable container into a meter element. This base element may be removeably attachable, e.g. by being screwed on, or may be permanently attached, e.g. by being integrally molded with the container. A one way valve (9) is located in the opening of the base element to permit the flow of material from a container through the opening while preventing backflow. The system also includes a meter element (11) which acts like an inverted trap and which has a sidewall portion and a top with an opening (17) in the top for dispensing of the material therefrom. The sidewall portion of the meter element is slightly larger than and has the same across sectional shape as the sidewall portion of the base element and this sidewall portion of the meter element is higher than and located about and encompasses the sidewall portion of the base element. Further, the meter element is vertically slideable along the sidewall portion of the base element with an upward position for receiving a volume of material in a pre-determined amount when the squeezeable container is squeezed and downward position whereby the opening in the top of the meter element allows for dispensing of the desired amount of fluid when the meter element is pushed down.</p> |
