HIGH GLOSS COLOR PRINTS BY TANDEM FUSING PROCESS
Original Publication Date: 1995-Aug-31
Included in the Prior Art Database: 2004-Apr-07
Xerox Disclosure Journal
An important customer requirements for pictorial process color is high gloss and in particular, variable gloss or customer selectable gloss. In contrast, monochrome black prints typically require low gloss. Disclosed is a fuser subsystem which fulfills the requirements for both monochrome black and full color. Because of the higher gloss requirements in color, special material packages and long dwell times are required, which suggest higher fuser loads and higher fuser energy use. One way to relax these requirements on the fuser and still achieve a glossy image is to feed a fused print through a second set of hard rolls loaded to a high contact pressure. The hard roll directly in contact with the image is heated to a specified temperature which corresponds to and produces the desired gloss level. The process is similar to the known calendering operation in a paper machine. Preferably, a minor paper buckle is present in the region between the hard roll pair and the fuser/pressure roll pair to prevent pulling of the copy sheet through the fuser system which may create wrinkle. The development of the buckle may be accomplished by imposing a small speed differential between the roller pairs.