Patent ID: 8909124
Filing Date: 2014-12-09
Classification: G03G

Abstract:
1. An image forming apparatus configured to selectively perform one-side image formation and duplex image formation, comprising: a sheet feed unit that feeds a sheet to an image forming unit forming a toner image on the sheet; a fixing unit that fixes the toner image to the sheet; a re-transport roller that reverses the sheet with the toner image fixed on the sheet and re-transports the sheet to the image forming unit when forming an image on both sides of the sheet; an obtaining unit that obtains information of a temperature of the re-transport roller; and a control unit that controls the sheet feed unit based on the information obtained by the obtaining unit, when a duplex image formation in which an image is to be formed by the image forming unit on both sides of a first sheet is started right after a one-side image formation in which an image is formed by the image forming unit on one side of a last sheet, so as to change a wait time, from the end of a first sheet feed operation for feeding the last sheet through the image forming unit in the one-side image formation to the start of a second sheet feed operation for feeding the first sheet through the image forming unit in the duplex image formation in response to the obtaining unit obtaining information of the temperature of the re-transport roller representing a temperature below the dew condensation temperature at the surface of the re-transport roller, wherein the wait time is for allowing dew condensation on the re-transport roller to evaporate.