Stock material or miscellaneous articles – Structurally defined web or sheet – Discontinuous or differential coating – impregnation or bond
Patent
1997-11-14
1999-12-21
Krynski, William
Stock material or miscellaneous articles
Structurally defined web or sheet
Discontinuous or differential coating, impregnation or bond
428199, 428209, 428343, 428352, 428354, 428472, 428915, 428916, 101 32, B32B 2700, B31F 100
Patent
active
060046562
ABSTRACT:
A color changeable device that has been partially activated. The device comprises a flexible substrate with a first major surface and a second major surface and an interference color generating laminate on the first major surface. The color generating laminate comprises a first layer and a second layer in intimate contact. When the first and second layers are in intimate contact, the laminate generates an interference color. When the first and second layers are not in intimate contact, the laminate does not generate the interference color. The substrate and laminate include a first permanent deformation causing separation of the first and second layers at a first portion of the device while retaining the first and second layers in intimate contact at a second portion of the device. The device is particularly useful for confirming the authenticity of an article without having to remove the color change device from the article.
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International Search Report from International Application No. PCT/US98/04951.
Gosselin Raymond R.
Spielbauer Thomas M.
3M Innovative Properties Company
Cronin Chris
Krynski William
Trussell James J.
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