Record receiver having plural interactive leaves or a colorless – Having a colorless color-former – developer therefor – or... – Method of use – kit – or combined with marking instrument or...
Patent
1996-07-03
1999-02-09
Hess, Bruce H.
Record receiver having plural interactive leaves or a colorless
Having a colorless color-former, developer therefor, or...
Method of use, kit, or combined with marking instrument or...
503208, 503209, 503216, 503225, B41M 534
Patent
active
058694200
ABSTRACT:
A rewritable thermal recording medium comprises a recording material containing a color former and a developer. Recording-erasing of information is performed on the basis of a change in the state of the recording material. The developer is formed of a compound capable of forming a liquid crystal phase and/or represented by general formula (I) given below ##STR1## wherein Ar denotes a noncondensed polycyclic structure consisting of a plurality of ring structures connected to each other via any of a single bond, a vinylene bond and an ethynylene bond or a condensation polycyclic structure, X denotes an ether bond, a thioether bond, an ester bond or an amide bond, Y is an acidic group, R is a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkenyl group, or a substituted or unsubstituted alkynyl group, m is an integer of 1 to 3, and n is 0 or 1.
REFERENCES:
patent: 5663115 (1997-09-01), Naito et al.
Patent Abstracts of Japan, JP 7-156540, Jun. 20, 1995.
Hess Bruce H.
Kabushiki Kaisha Toshiba
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