Signals and indicators – Alarms – Reeled material end
Patent
1981-06-03
1983-08-16
Kazenske, E. R.
Signals and indicators
Alarms
Reeled material end
116137R, 46179, 206459, 206829, 215262, 220231, 220359, 220373, G08B 300, B65D 5124, G10K 500
Patent
active
043984916
ABSTRACT:
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.
REFERENCES:
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patent: 2764121 (1954-02-01), Showstack
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patent: 4277300 (1978-07-01), Taluba
Fridl James J.
Nonnemann Heinz W.
Payne Robert D.
Szpitalak Wesley J.
Brown Charles E.
Chapman J.
Kazenske E. R.
The Continental Group Inc.
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