Cleaning device of heat-fixing device

Abstract

Abstract PURPOSE:To surely prevent adhesion of toner to a fixing roller, by providing the fixing roller and 1st and 2nd cleaning rollers in such a way that they are arranged in the described order under a condition here they can be contacted with and separated from each other and their mold releasability and temperature are lowered in this order, and setting the surface temperature of the 2nd cleaning roller at or lower than the melting point of the toner. CONSTITUTION:A heat-fixing roller 1 is covered with a resin 1b having a good mold releasability and a thermistor 12 is contacted with the surface of the roller 1 so as to control the surface temperature of the roller 1. Then the 1st cleaning roller 13 which is contacted with the roller 1 is covered with another resin 13c having an inferior mold releasability and the 2nd cleaning roller 14 which is contacted with the roller 13 is covered with a resin 14b having a more inferior mold releasability. Surface temperature of each roller is gradually lowered as in the case of mold releasability and the surface temperature of the roller 14 is set at or lower than the melting point of adhering toner. Therefore, the toner adhering to the fixing roller 1 is surely transferred to the roller 14 through the roller 13 and offset can be prevented.

Inventors

• 👤 Moriyoshi Matsushiro
• 👤 松代　守可

Bibliographic Details