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US 8,002,941 B2Granted
Method and apparatus for producing a package or for packaging a food product
AssigneeKraft Foods R & D, Inc.
InventorsRonald H. Exner, Olav Dagestad
Life of this patent
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Abstract
A package material with a tamper evident feature and methods of manufacture thereof, are disclosed herein. The package comprises a colored primer or lacquer coating applied along a portion of a seal and further comprising a peelable sealant. When opened the peelable sealant is separated from the portion of the seal containing colored primer or lacquer and removes a section of the coating, thus providing a visual indication that the package has been opened.
Claims11
A method for producing a packaging material comprising the steps of:
- covering at least a first and a second surface portion of a substrate with a sealant;
- covering a third surface portion adjacent the first surface portion with a coating having a bonding force between the coating and the substrate, where the bonding force has a first value;
- and
- covering a part of a fourth surface portion adjacent the second surface portion with an adhesive, where the adhesive and the substrate have a bonding force therebetween having a second value, and the adhesive and the coating have a bonding force therebetween having a third value, where both the second and the third value are each greater than the first value, and a color of the coating being different than a color of the third surface portion, the fourth surface portion, or the adhesive.
1 more element
Dependencies are inferred from the claim text.