Reversible heat-sensitive paper and methods for writing information
US7151074B1 · kind B1 · utility
Assignees
Inventors
Key dates
| Filing date | Nov 5, 1999 |
| Grant date | Dec 19, 2006 |
| Priority date | — |
| Expiry date | Nov 5, 2019 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41M5/305
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A reversible heat-sensitive layer 1a provided with an electron donative precursor and a reversible developer that colors and discolors the precursor, is provided on the surface of a base, and the reversible heat-sensitive recording layer is heated previously to a molten state and then quickly cooled to a solid colored state. Using this reversible heat-sensitive paper (reversible writing heat-sensitive paper), the reversible heat-sensitive recording layer is heated during operation to a color-erasing temperature range lower than the melting temperature of the layer, thereby, a heated part is discolored and written with information. Thus, the life of the reversible heat-sensitive layer can be prolonged and information can be written with weak light.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.