Patent ID: 9031443
Filing Date: 2015-05-12
Classification: G03G

Abstract:
1. An image forming apparatus comprising: an image forming station configured to form an unfixed image on a recording material; a fixing portion configured to heat and fix an unfixed image formed on the recording material, said fixing portion including a heater, a fixing rotatable member, and a pressing roller cooperative with said fixing rotatable member to form a nip for nipping and feeding the recording material; an ambient condition sensor configured to detect an ambient temperature and an ambient humidity; and a controller configured to control said fixing portion and to control a conveyance of the recording material, wherein said controller starts, upon receiving print instructions, electric power supply to said heater so as to raise a temperature of said fixing portion to a control target temperature for a fixing operation, and wherein said controller sets a time period from the timing at which the temperature of the fixing portion reaches the control target temperature to the timing at which the recording material enters the nip, on the basis of the ambient temperature and the ambient humidity.