Printed matter – Having revealable concealed information – fraud preventer or... – By removeable material
Patent
1986-11-12
1988-04-19
Bell, Paul A.
Printed matter
Having revealable concealed information, fraud preventer or...
By removeable material
428346, 428352, 428 40, 283 97, B42D 1500, B41M 518
Patent
active
047384727
ABSTRACT:
A thermosensitive label rendered unusable by removal from its first application includes a thermosensitive color-forming layer on one side of a substrate and a remoistenable adhesive on an opposite side of the substrate. The substrate is selected to have a tensile strength less than that necessary to separate the substrate from a surface after its first application thereto without ripping. The activation temperature of the thermosensitive color-forming layer is selected so that attempts to remove the label from its first application by means of heat, or steam, cause discoloration of the label.
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Bell Paul A.
Hackler Walter A.
Ricoh Electronics, Inc.
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