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
1988-06-20
1999-09-28
Hess, B. Hamilton
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...
427150, 427151, 503208, 503209, B41M 518
Patent
active
RE0363219
ABSTRACT:
In a heat-sensitive recording material incorporating a colorless or pale-colored basic dye and a color acceptor which is reactive with the basic dye to form a color when contacted therewith, the recording material is contained in a heat-sensitive recording layer ##STR1## wherein X is --O-- or --COO--, R.sub.1 to R.sub.4 are each hydrogen atom, alkyl having 1 to 8 carbon atoms, aryl having 6 to 10 carbon atoms, aralkyl having 7 to 9 carbon atoms, chlorine atom, acetyl, propionyl, methoxy, methylthio, methoxycarbonyl, cyano, nitro or cyclohexenyl, substituents R.sub.1 and/or R.sub.2 or substituents R.sub.3 and R.sub.4 may link together to form aromatic ring(s), n is an integer of 1 to 10.
REFERENCES:
patent: 4251593 (1981-02-01), Sakamoto et al.
patent: 4342473 (1982-08-01), Chang
patent: 4444844 (1984-04-01), Kubo et al.
patent: 4479138 (1984-10-01), Ikeda et al.
Aoyagi Shoji
Arai Naoto
Ishibashi Takashi
Kitani Masakatu
Saito Toranosuke
Hess B. Hamilton
Kansaki Paper Manufacturing Co. Ltd.
Sanko Kaihatsu Kagaku Kekyusho Corporation
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