Reversible thermosensitive recording medium, label, and image forming and erasing method using the same
US6818591B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 19, 2002 |
| Grant date | Nov 16, 2004 |
| Priority date | — |
| Expiry date | Feb 6, 2023 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41M2205/38
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A reversible thermosensitive recording medium comprising an concealing layer provided between a reversible thermosensitive recording layer which is reversibly changed in its color by heat and a photo-thermal conversion layer which absorbs light with generating heat, wherein the concealing layer has an optical characteristic that the ratio of a light absorptivity of light having 555 nm wavelength, in comparison with a light absorptivity of laser light wavelength, is 80% or less. This reversible thermosensitive recording medium has a concealing layer to conceal the color of the photo-thermal conversion layer, thereby the visibility and the contrast of the obtained images are significantly improved, further more, durability in repeated used is also significantly improved.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.