Record receiver having plural interactive leaves or a colorless – Having a colorless color-former – developer therefor – or... – Identified organic electron acceptor other than phenolic resin
Patent
1997-12-03
1999-07-27
Hess, Bruce H.
Record receiver having plural interactive leaves or a colorless
Having a colorless color-former, developer therefor, or...
Identified organic electron acceptor other than phenolic resin
503201, 503225, 503226, B41M 534
Patent
active
059289880
DESCRIPTION:
BRIEF SUMMARY
DESCRIPTION
1. Technical Field
The present invention relates to a thermosensitive reversible recording material capable of being recorded by color-developing and of being erased by color-erasing, and of holding the color-developed condition and the color-erased condition at room temperature. More particularly, the present invention relates to a thermosensitive reversible recording material capable of forming colored images having a high contrast on a white. ground, having a good image-retention characteristic and capable of being repeatedly color-developed and color-erased many times.
2. Background Art
Generally, since a thermosensitive recording apparatus is compact and cheap and is easy to maintain, a thermosensitive recording material has been used as an output sheet for computers, measurement equipments, registers, CD.multidot.ATM, facsimiles, automatic ticket vending machines, and hand-held terminals and, recently, as a magnetic and thermosensitive recording card for prepaid cards and point cards, in which a magnetic recording facility is added. In conventional magnetic, thermosensitive recording cards, while the magnetic information can be renewed at every use, the thermally recorded images cannot be renewed and additional information, for example, remaining number of uses, must be additionally recorded in a portion of the card free from the recorded images. However, since the area of the portion of the card capable of receiving the additional information is limited, the amount of the thermally recorded information is limited or, when the additional information-recording area is filled, the card is replaced by a new one. Accordingly, to solve the above-mentioned disadvantages, a development of a thermosensitive reversible recording material capable of repeatedly renewing the information record has been strongly demanded.
Also, based on a recent emphasis on waste-treatment and forest-preservation, re-use of the thermosensitive recording material is desired. There have been various attempts to re-using thermosensitive recording material. Especially, a thermosensitive reversible recording material capable of repeatedly renewing the recorded information many times is demanded to be developed, as widely usable means which does not need a large scale of apparatus, for example, an ink-removing apparatus.
Also, the thermosensitive reversible recording materials as disclosed in Japanese Unexamined Patent Publications No. 3-233,490 and No. 5-42,762 have attracted public attention as a recording material for simple display, and a thermosensitive reversible recording material suitable for the above-mentioned display apparatus is strongly demanded to be developed.
On the basis of the above-mentioned demands, various types of reversible thermosensitive recording materials have been proposed.
For example, in Japanese Unexamined Patent Publications No. 63-107,584, No. 4-78,573 and No. 4-358,878, reversible thermosensitive recording materials utilizing a polymer capable of changing transparency thereof in response to heating conditions are described. However, since these recording materials utilize a transparent-to-opaque changing phenomenon due to a phase transition of the polymer, a satisfactory transparency and a sufficient opacity cannot be easily obtained, the contrast between the color-developed images and the color-erased image traces is low, and naked eye-observation in the dark is difficult. Also, in general, the above-mentioned type of recording materials are disadvantageous in that since white images are recorded on a colored ground of the recording material, a recording material capable of recording colored images on a white ground, namely, a paper-like recording material, is difficult to obtain.
As means for solving the above-mentioned problems of the conventional reversible thermosensitive recording materials, a dye-type reversible thermosensitive recording material using a conventional dye usable for conventional thermosensitive recording materials and capable of reversibly recording with the dye is k
REFERENCES:
patent: 4628337 (1986-12-01), Sekine et al.
Nishioka Makoto
Yamane Kazuo
Hess Bruce H.
Oji Paper Co. Ltd.
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