Bottles and jars – Closures – Including visual indicia
Patent
1986-09-10
1987-08-11
Hall, George T.
Bottles and jars
Closures
Including visual indicia
206807, B65D 5502
Patent
active
046855785
ABSTRACT:
A sheet or strip of material has compartments or cavities therein, at least some of which contain materials flowable under pressure such as liquids. Upon the application of pressure, liquid will move within the sheet to contact or penetrate other compartments. The contact between the displaced liquid and other materials within the sheet create a color change which is visually observable. A color change thus indicates that sufficient pressure has been applied to the sheet to cause internal transfer of the liquid. These sheets can be used on packages and containers such as boxes, cartons, jars, bottles and the like. The selection of a sheet which ruptures at a chosen threshold pressure can be used to indicate if an undesirable level of pressure, such as that necessary to twist open a cap, had been applied to the article underneath the sheet.
REFERENCES:
patent: 3450129 (1969-06-01), Avery et al.
patent: 3700529 (1972-10-01), Monaghan
patent: 3776220 (1973-12-01), Monaghan
patent: 4462224 (1984-07-01), Dunshee et al.
patent: 4480760 (1984-11-01), Schonberger
patent: 4511052 (1985-04-01), Klein et al.
patent: 4519515 (1985-05-01), Schonberger
patent: 4591062 (1986-05-01), Sandhaus
Hall George T.
Litman Mark A.
Minnesota Mining and Manufacturing Company
Sell Donald M.
Smith James A.
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