发明名称 |
Rewriteable card, printing apparatus for printing the card and a method of judging the life of the same |
摘要 |
A rewriteable card of the invention is composed of a thermally reversible thermosensitive recording material which changes reversibly between a slightly opaque state and a transparent state depending on a given heating condition wherein the rewriteable card includes a reference slightly opaque portion at the part thereof having the reflectance equivalent to a slight opacity state of the thermally reversible thermosensitive recording material in an early stage or a last stage of use of the rewriteable card. A method of judging the life of the rewriteable card is based on the result of detection of the reflectance on a printing slightly opaque portion and that on the reference slightly opaque portion, and a printing apparatus is provided with a card life judging device employing the judging method.
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申请公布号 |
US5448280(A) |
申请公布日期 |
1995.09.05 |
申请号 |
US19940345432 |
申请日期 |
1994.11.21 |
申请人 |
TOHOKU RICOH CO., LTD. |
发明人 |
MATSUDA, HIDEAKI;TAZAWA, SHIGERU |
分类号 |
B41J2/32;B41J2/45;(IPC1-7):B41M5/00 |
主分类号 |
B41J2/32 |
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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