Abstract: An image forming apparatus has a movable image bearing member, a image forming device for forming a developer image on the image bearing member, and an intermediate transfer member on which the developer image on the image bearing member is transferred while it is moving at a predetermined surficial moving speed different from the surficial moving speed of the image bearing member. The image forming apparatus forms a predetermined image prior to formation of a normal image.

Abstract: An image forming apparatus has a movable image bearing member, a image forming device for forming a developer image on the image bearing member, and an intermediate transfer member on which the developer image on the image bearing member is transferred while it is moving at a predetermined surficial moving speed different from the surficial moving speed of the image bearing member. The image forming apparatus forms a predetermined image prior to formation of a normal image.

Abstract: Provided is an image forming apparatus, including: a movable image bearing body; an image forming unit for forming a developer image on the image bearing body; a transferring unit for transferring the developer image formed on the image bearing body onto a moving transferring medium; and a control unit for controlling the image forming unit to form a predetermined image composed of a dot image with a predetermined density prior to formation of a normal image, in which a composite image is formed from the normal image and the predetermined image in an area where the normal image is to be formed, and the dot image is formed in a dot area having the normal image and the predetermined image overlapped with each other, with a density determined on the basis of a relationship between a density of the normal image and the predetermined density in the dot area.

Abstract: Provided is an image forming apparatus, including: a movable image bearing body; an image forming unit for forming a developer image on the image bearing body; a transferring unit for transferring the developer image formed on the image bearing body onto a moving transferring medium; and a control unit for controlling the image forming unit to form a predetermined image composed of a dot image with a predetermined density prior to formation of a normal image, in which a composite image is formed from the normal image and the predetermined image in an area where the normal image is to be formed, and the dot image is formed in a dot area having the normal image and the predetermined image overlapped with each other, with a density determined on the basis of a relationship between a density of the normal image and the predetermined density in the dot area.

Abstract: A stepping motor control circuit sets the setting values of each defining a driving pulse period corresponding to a number of velocity steps at the time of accelerating or decelerating a stepping motor in a register, and performs calculation so as to divide each difference between driving pulse periods in between respective setting values into a predetermined number of pieces to change the driving pulse period. By doing so, this smoothly controls the acceleration and deceleration of the stepping motor without enlarging circuit scale and stepping out even if there is no excessive torque margin.

Abstract: Provided is an image forming apparatus, including: a movable image bearing body; an image forming unit for forming a developer image on the image bearing body; a transferring unit for transferring the developer image formed on the image bearing body onto a moving transferring medium; and a control unit for controlling the image forming unit to form a predetermined image composed of a dot image with a predetermined density prior to formation of a normal image, in which a composite image is formed from the normal image and the predetermined image in an area where the normal image is to be formed, and the dot image is formed in a dot area having the normal image and the predetermined image overlapped with each other, with a density determined on the basis of a relationship between a density of the normal image and the predetermined density in the dot area.

Abstract: An image forming apparatus has a movable image bearing member, a image forming device for forming a developer image on the image bearing member, and an intermediate transfer member on which the developer image on the image bearing member is transferred while it is moving at a predetermined surficial moving speed different from the surficial moving speed of the image bearing member. The image forming apparatus forms a predetermined image prior to formation of a normal image.

Abstract: The fixing apparatus has a fixing member which is heated by a heating member and for heating and fixing a toner image on a recording material, temperature detecting device for detecting a temperature of the fixing member by absorbing an infrared ray emitted from the fixing member, and controlling device for controlling power-supply to the heating member, based on an output of the temperature detecting device. In the fixing apparatus, an infrared ray emissivity of the fixing member is equal to or lower than an infrared ray emissivity of the toner within a detection range of the temperature detecting device.

Abstract: A stepping motor control circuit sets the setting values of each defining a driving pulse period corresponding to a number of velocity steps at the time of accelerating or decelerating a stepping motor in a register, and performs calculation so as to divide each difference between driving pulse periods in between respective setting values into a predetermined number of pieces to change the driving pulse period. By doing so, this smoothly controls the acceleration and deceleration of the stepping motor without enlarging circuit scale and stepping out even if there is no excessive torque margin.

Abstract: A temperature control apparatus for controlling a fuser in an image forming apparatus is provided. The temperature control apparatus has a thermistor for detecting the temperature of a fusing roller; a switching circuit for turning ON/OFF the power supply to the fusing roller; and a microcomputer for periodically outputting, when controlling the temperature, an instruction signal instructing at least one of turning ON and OFF of the power supply to the fusing roller on the basis of the detected temperature. When the instruction signal to be periodically output from the microcomputer is output within a predetermined time longer than the instruction-signal output period, the switching circuit is turned ON/OFF in accordance with the instruction signal, and when no instruction signal is output, the switching circuit is turned OFF.

Abstract: The fixing apparatus has a fixing member which is heated by a heating member and for heating and fixing a toner image on a recording material, temperature detecting device for detecting a temperature of the fixing member by absorbing an infrared ray emitted from the fixing member, and controlling device for controlling power-supply to the heating member, based on an output of the temperature detecting device. In the fixing apparatus, an infrared ray emissivity of the fixing member is equal to or lower than an infrared ray emissivity of the toner within a detection range of the temperature detecting device.

Abstract: A temperature control apparatus for controlling a fuser in an image forming apparatus is provided. The temperature control apparatus has a thermistor for detecting the temperature of a fusing roller; a switching circuit for turning ON/OFF the power supply to the fusing roller; and a microcomputer for periodically outputting, when controlling the temperature, an instruction signal instructing at least one of turning ON and OFF of the power supply to the fusing roller on the basis of the detected temperature. When the instruction signal to be periodically output from the microcomputer is output within a predetermined time longer the instruction-signal output period, the switching circuit is turned ON/OFF in accordance with the instruction signal, and when no instruction signal is output, the switching circuit is turned OFF.