发明名称 |
Heat sensitive system and use thereof |
摘要 |
A heat sensitive system comprises a document having a localized, non-pressure sensitive, coating of chromogenic composition activated at moderate temperatures. Quickly striking the chromogenic composition with a fingernail or blunt object produces a colored image by frictional heat. The chromogenic composition contains a chromogenic compound and a color developer which are non-pressure sensitive and non-reactive at room temperature. The chromogenic composition can be an intimate mixture of the chromogenic compound and the developer or alternatively separate layers of each of the components.
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申请公布号 |
US5427415(A) |
申请公布日期 |
1995.06.27 |
申请号 |
US19920987710 |
申请日期 |
1992.12.09 |
申请人 |
WALLACE COMPUTER SERVICES, INC. |
发明人 |
CHANG, JOHN C. H. |
分类号 |
B41J2/315;B41J2/32;B41M3/14;B41M5/34;B42D15/00;B44F1/10;G07D7/12;G07D7/14;G09F3/02;(IPC1-7):B42D15/10 |
主分类号 |
B41J2/315 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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