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US 7,460,822 B2Granted
Printing roll having a controllable heat-absorbing internal surface
AssigneeXerox Corporation
InventorsScott M. Potter, John Poxon, Pieter Mulder
Life of this patent
Estimating the term…
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.
Claims12
An apparatus useful in printing, comprising
- a roll defining an outer surface and an inner surface;
- a structure for controlling absorptivity of at least a portion of the inner surface, the structure including a material that changes absorptivity in response to electrical stimulus.
Dependencies are inferred from the claim text.