Heat fixing assembly control for image forming apparatus, involves maintaining temperature of heating roller more than minimum temperature, during power saving mode followed by resetting roller to operation mode

摘要

Temperature rise of heating roller (13) is controlled based on temperature measurement result in usual operation mode. When temperature of roller reaches target fixing temperature at which toner image melts, roller is reset to usual operation mode from power saving mode within the desired time. The roller is controlled to be maintained at temperature more than minimum temperature, during power saving mode. Temperature rise per unit time of heating roller (13) is measured by temperature measurement unit (6). Independent claims are also included for the following: (a) Control device of heat fixing assembly; (b) Heat fixing assembly; (c) Image forming apparatus with heat fixing assembly