| Patent Number |
Title Of Patent |
Date Issued |
| 6375742 |
Apparatus for processing paper sheets to decolor an image formed thereon |
April 23, 2002 |
| A decoloring apparatus for an image forming material comprising means for bringing a solvent into contact with an image forming material formed on a paper sheet and containing a color former, a developer and a decolorizer, and means for removing a residual solvent from the paper sheet. |
| 6373575 |
Paper classification apparatus |
April 16, 2002 |
| A paper classification apparatus includes a heater for heating paper or a solvent supply unit for supplying a solvent to the paper, a detector, a computer, and a selector guide. The detector detects the reflection density of the paper after being heated or supplied with the solvent. The |
| 6329317 |
Decoloring method of decolorizable image forming material |
December 11, 2001 |
| A method of decoloring an image formed on a paper sheet by using an image forming material containing a color former, a developer and a decolorizer, comprising the steps of bringing a solvent into contact with the image forming material for decoloring the image, and removing the residual |
| 6277208 |
Method of decoloring an image forming material formed on a paper sheet |
August 21, 2001 |
| An image forming material formed on a paper sheet and containing a color former, a developer and a decolorizer, is decolored by heating of the image forming material, contacting the image forming material with a solvent optionally containing a decolorizer, and removing a residual sol |
| 6248692 |
Erasable image forming material |
June 19, 2001 |
| An erasable image forming material includes a color former, a developer, and a decolorizer and is erasable by contact with an erase solvent. Free energy .alpha. required for the decolorizer and the developer to form a complex and free energy .beta. required for the color former and the |
| 6203603 |
Erasable image forming material |
March 20, 2001 |
| An erasable image forming material includes a color former, a developer, a binder resin, and a polymer decolorizer having an electron donating group capable of physically or chemically adsorbing the developer. This polymer decolorizer is, e.g., a polymer compound having a sugar skeleton, |
| 6159654 |
Negative photosensitive polymer composition of a thermosetting polymer precursor curable by cycl |
December 12, 2000 |
| A negative photosensitive polymer composition, which comprises a thermosetting polymer precursor which can be cured through cyclodehydration upon heating, and a photosensitive heat cure accelerator which is capable of accelerating a curing upon irradiation of light (cyclodehydration |
| 6054870 |
Liquid crystal device evaluation method and apparatus |
April 25, 2000 |
| Impurities mixed in the liquid crystal device are detected by a method comprising the steps of applying a DC electric field to a liquid crystal device having a liquid crystal layer between a pair of electrodes, and irradiating the liquid crystal device with light within a specific wa |
| 6017386 |
Decolorizable ink and printer |
January 25, 2000 |
| A decolorizable image forming material comprising a color former, a developer and a decolorizer, the decolorizer comprising a highly amorphous phase separation inhibitor and a slightly amorphous phase separation inhibitor. A cyclic sugar alcohol is used as the highly amorphous phase |
