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AssigneeThe Continental Group, Inc.
InventorsJames J. Fridl, Heinz W. Nonnemann, Robert D. Payne, Wesley J. Szpitalak
Estimating the term…
This relates to the provision of a vacuum indicator in a container wherein a product is vacuum packaged. Most specifically, an end unit for a conventional container is provided with a vent opening through which air rushes into the container when opened. There is secured to the underside of the end unit a whistle device in communication with the opening so that the inwardly rushing air actuates the whistle device and causes the whistle device to emit a whistling sound in accordance with the vacuum present within the container and thereby gives an audible indication of the freshness of the product.
An end unit attached to a vacuum pack container, said end unit including a flat panel portion with an opening therethrough, vacuum indicating means in the form of a whistle device on the underside of said flat panel portion in communication with said opening, and a removable closure secured to an upper side of said flat panel and normally closing said opening.
Dependencies are inferred from the claim text.