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what is the lower pressure roller ?

Fixing roller commonly known as heating roller, is one of the components of the fuser unit.The utility model is composed of two parts of a fixing upper roller and a fixing lower pressuere roller.
Here let me tell you what is the lower pressure roller :
The middle of the lower roller is a steel solid roller, in the middle of the majority (Correspond to the upper fixing roller) and it has a rubber layer about 0.8CM thick, usually red, in the rubber layer is coated with a thin layer of high temperature (80 degrees) chemical film. Its main function is to press the upper roll of the fixing, which is not driven in itself. The power of the rotation is from the friction of the fixing upper roller and the rotation of the fixing upper roller can fix the copy carbon powder image by high temperature and send it to the paper tray of the copier.
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