Image forming apparatus controlling temperature of fixing portion in image formation mode and in standby modes

摘要

An image forming apparatus comprising sheet cassettes accommodating different kinds of sheets, respectively; an image forming station for forming images on the sheets fed from the accommodating portions in response to image formation instructions; a heater for heating the images on the sheets; an acquiring portion for acquiring information corresponding to kinds of the sheets; a controller configured to control a target temperature when the heater heats the image on the sheet, on the basis of the information; a selector for selecting one of modes including a first mode in which the target temperatures are set for the kinds of the sheets, respectively and a second mode in which the target temperatures are set commonly to the kinds of the sheets, wherein the controller sets the target temperature of the heater in a stand-by state, at a common temperature, when the selector selects the second mode.

主权项

1. An image forming apparatus comprising:
a first accommodating portion configured to accommodate at least one sheet; a second accommodating portion configured to accommodate at least one sheet of a type different from the sheet accommodated in said first accommodating portion; an image forming portion configured to form a toner image on the sheet fed from one of said first and second accommodating portions in response to an image formation instruction in an image formation mode; a fixing portion configured to fix the toner image formed on the sheets by said image forming portion; an acquiring portion configured to acquire information corresponding to the type of sheet accommodated in each of said first and second accommodating portions; a first controller configured to control the temperature of said fixing portion in the image formation mode so as to maintain at a target temperature in the image formation mode which is set based on the type of the sheet, acquired by said acquiring portion, used in the image formation mode; and a second controller configured to control an operation of said fixing portion in a plurality of stand-by modes waiting for the image formation instruction so as to maintain at a target temperature in the stand-by modes, wherein the plurality of stand-by modes include a first stand-by mode in which the target temperature in the first stand-by mode is variably set based on the type of the sheet used in a last image formation mode, and a second stand-by mode in which the target temperature in the second stand-by mode is commonly set based on the types of the sheets accommodated in said first and second accommodating portions.