Printing roll having a controllable heat-absorbing internal surface
US7460822B2 · kind B2 · utility
4Cited by
8References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 3, 2006 |
| Grant date | Dec 2, 2008 |
| Priority date | — |
| Expiry date | Apr 12, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/2042
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A roll useful in fusing marking material to a print sheet includes a coating disposed on at least a portion of the inner surface thereof. A lamp disposed inside the roll supplies radiant energy to the inner surface. The coating changes its absorptivity (such as color) as desired, to obtain specific desired temperatures at different portions of the roll. The coating can be thermochromic, changing its absorptivity in response to local temperature; or electrochromic, changing its absorptivity in response to an external electrical stimulus.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.