Reversible thermosensitive recording medium, card, label, disk, disk cartridge, tape cassette, method of producing the recording medium, and method of recording and erasing images using the same
US6362130B1 · kind B1 · utility
Assignees
Inventors
Key dates
| Filing date | Sep 2, 1998 |
| Grant date | Mar 26, 2002 |
| Priority date | — |
| Expiry date | Sep 2, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B23/046
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A reversible thermosensitive recording medium is capable of assuming a first color in a first temperature range which is above room temperature, having a first color assuming initiation temperature and a first color assuming upper-limit temperature, and assuming a second color when heated to a second temperature range which is above the first temperature range and then cooled, having a second color assuming lower-limit temperature, (a) the first color assuming upper-limit temperature being 125° C. or more, (b) the difference between the first color assuming upper-limit temperature and the second color assuming lower-limit temperature being 20° C. or less, and (c) the first color assuming initiation temperature being 95° C. or more, and a method of recording and erasing images, using the recording medium, a method of producing the recording medium, and the application thereof a card, a label, writable or rewritable disk cartridge, disk and tape cassette are proposed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.