Patent ID: 8737861
Filing Date: 2014-05-27
Classification: G03G

Abstract:
1. A fixing device comprising: a fixing rotation body configured to be in contact with a side of a recording medium, an unfixed image formed on the side of the recording medium, and heat and fix the unfixed image onto the recording medium; a pressing rotation body configured to be in contact with another side of the recording medium, no unfixed image being formed on the other side of the recording medium, and press the recording medium to the fixing rotation body; and a temperature detection unit configured to detect a temperature of the pressing rotation body; wherein in a case where an input voltage rate to the fixing device is equal to or greater than a predetermined value and an outside air temperature is equal to or greater than a predetermined value, the fixing device determines that the warm-up operation is finished when a predetermined time period has elapsed since a warm-up operation has started before a temperature detected by the temperature detection unit is equal to or greater than a predetermined temperature or when the temperature detected by the temperature detection unit is equal to or greater than the predetermined temperature before the predetermined time period elapses since the warm-up operation has started.