Printing roll having a controllable heat absorbing internal surface
US7532848B2 · kind B2 · utility
1Cited by
8References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 14, 2008 |
| Grant date | May 12, 2009 |
| Priority date | — |
| Expiry date | Jul 14, 2028 |
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.