Methods for direct thermal recording media based on selective change of state
US12246550B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 27, 2022 |
| Grant date | Mar 11, 2025 |
| Priority date | — |
| Expiry date | Feb 9, 2043 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41M2205/38
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Direct thermal recording media are designed to operate based on a thermally-induced change of state rather than a thermally-induced chemical reaction between a leuco dye and an acidic developer. The media use two types of solid scattering particles, one of which changes its state from solid to liquid during printing, and the other of which does not. The former particles, upon melting, fill spaces between the latter particles, thus eliminating or substantially reducing light scattering, which makes an underlying colorant visible at selected print locations where heat is locally applied. The media can provide high quality thermally-produced images at print speeds at least as high as 10 inches per second (ips).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.