Patent ID: 8238771
Filing Date: 2012-08-07
Classification: G03G

Abstract:
1. An image forming apparatus having a paper-type detecting unit, comprising: a paper-type detecting unit that detects a paper type of a sheet to be printed, the paper-type detecting unit detecting paper type as a differential voltage between an output voltage before sheet insertion and an output voltage after sheet insertion; a fixing unit that sets fixing temperature on the basis of the paper type detected by the paper-type detecting unit and fixes a toner image on the sheet; a paper-type-detection-failure determining unit that determines a failure if the output voltage before sheet insertion is outside a first predetermined voltage range, and, determines a failure if the output voltage before sheet insertion is within the first predetermined voltage range and the differential voltage is outside a second predetermined voltage range; a paper-type-during-failure setting unit that sets in advance, according to a region, a paper type to be used as a paper type during a failure; and a condition-during-failure setting unit that sets, if the paper-type-detection-failure determining unit determines that the paper-type detecting unit is in failure, a printing condition for the paper type set by the paper-type-during-failure setting unit.