Record receiver having plural interactive leaves or a colorless – Having a colorless color-former – developer therefor – or... – Plural colors or plural diverse systems
Patent
1988-11-15
1989-10-10
Hess, Bruce H.
Record receiver having plural interactive leaves or a colorless
Having a colorless color-former, developer therefor, or...
Plural colors or plural diverse systems
428913, 430138, 503215, 503226, B41M 516, G03C 172
Patent
active
048732192
ABSTRACT:
An improved self-contained record material having tamper resistance through an indicator quality is disclosed. The self-contained record material of the invention is suitable for forming a visible mark with a focussed means of pressure application such as a stylus, needle, or pen and which mark can then later be in part fixed by unfocussed light. The self-contained record material comprises a substrate on which is coated two sets of microcapsules only one of which is made photosensitive to change in viscosity upon exposure to actinic radiation, and the first of which are conventional microcapsules. The color formers in each of the sets of microcapsules are selected to express a different observed color. Original markings, for example, could be black (combination of the orange and blue color formers). After exposure to actinic radiation desensitizing the blue color former containing capsules, subsequent markings are orange indicating the aspect of the subsequence in time.
REFERENCES:
patent: 4440846 (1984-04-01), Sanders et al.
patent: 4576891 (1986-03-01), Adair et al.
patent: 4760048 (1988-07-01), Kurihara et al.
Brown Robert W.
Churchill Donald
Appleton Papers Inc.
Hess Bruce H.
Mieliulis Benjamin
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