Method and Apparatus for Producing a Package or for Packaging a Food Product
AssigneeKraft Foods R & D, Inc.
InventorsRonald Exner, Olav Dagestad
Life of this patent
Estimating the term…
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.
Claims43
A package formed from a substrate, the package comprising:
- a first and a second surface portion of the substrate, wherein the first and the second surface portions are sealed to each other;
- a third surface portion adjacent the first surface portion, and at least partially covered with a coating;
- a bonding force between the coating and the substrate, the bonding force having a first value;
- a fourth surface portion adjacent the second surface portion, and only partially covered with an adhesive;
- a bonding force between the adhesive and the substrate having a second value and a bonding force between the adhesive and the coating having a third value, where both the second and the third value are greater than the first value;
- and
- a color of the coating different from a color of the third surface portion, the fourth surface portion, or the adhesive and wherein the coating and the adhesive are at least partially in contact with each other, so that separating the fourth surface portion from the third surface portion will at least partially remove the coating from the third surface portion.
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.
A machine for producing a packaging material comprising:
- a device for covering at least a first and a second surface portion of a substrate with a sealant;
- a device for covering a third surface portion adjacent the first surface portion with a coating, the coating and the substrate having a bonding force therebetween and the bonding force having a first value;
- and
- a device for covering only a part of a fourth surface portion adjacent the second surface portion with an adhesive.
A packaging material formed from a substrate, the packaging material comprising:
- a first and a second surface portion of the substrate, wherein the first and the second surface portions are covered with a sealant;
- a third surface portion adjacent the first surface portion, and at least partially covered with a coating having a bonding force between the coating and the substrate, where the bonding force has a first value;
- a fourth surface portion adjacent the second surface portion and only partially covered with an adhesive;
- a bonding force between the adhesive and the substrate having a second value and a bonding force between the adhesive and the coating having a third value, where both the second and the third values are greater than the first value;
- and
- a color of the coating different from a color of the third surface portion, the fourth surface portion, or the adhesive.
Dependencies are inferred from the claim text.