Abstract: An image forming apparatus includes: a transfer member that secondarily transfers a developer image primarily transferred to a intermediate transfer medium, to a recording medium; a charging member that charges residual developer remaining on the intermediate transfer medium after the developer image is secondarily transferred from the intermediate transfer medium to the recording medium; and a storage portion that stores information on a image bearing member. A bias applied to the charging member is changed based on the information when the residual developer charged by the charging member is collected by being transferred from the intermediate transfer medium to the image bearing member.

Abstract: The image forming apparatus includes an image bearing member, a charge member, a transfer unit, an application unit, a cleaning member, a detection unit that detects an index value, and a control unit that, in a case where one or a plurality of consecutive toner images for which the index value is equal to or greater than a first threshold value is formed, performs control which increases an absolute value of the transfer voltage for a toner image to be formed next, and in a case where one or a plurality of consecutive toner images for which the index value is less than a second threshold value equal to or greater than the first threshold value is formed, performs control which decreases an absolute value of the transfer voltage for a toner image to be formed next.

Abstract: The image forming apparatus includes a control unit configured to selectively execute an operation for applying a voltage with a polarity opposite to an original charging polarity of a toner to a first charging member and a second charging member and an operation for applying a voltage with the polarity opposite to the original charging polarity of the toner to one of the first charging member and the second charging member and a voltage with the same polarity as the original charging polarity of the toner to another of the first charging member and the second charging member as a cleaning operation for charging a secondary transfer residual toner to the polarity opposite to the original charging polarity of the toner by using the first charging member and the second charging member to transfer the secondary transfer residual toner onto an image bearing member.

Abstract: When executing a job which is a series operations for forming images on a single or a plurality of transfer materials and outputting the transfer material(s), started by a start instruction, a control device switches a polarity of a voltage applied by a first transfer power source in response to a switching of a polarity of a voltage applied by a charging power source, and switches a voltage applied by a second transfer power source from a first voltage to a second voltage which is larger in absolute value than the first voltage.

Abstract: An image forming apparatus charges toner on a transfer belt by using a first brush and collects the toner, in which a second brush is provided on the upstream side of the first brush, and the amount of inroad of the second brush into the transfer belt is larger than the amount of inroad of the first brush into the transfer belt.

Abstract: The image forming apparatus includes a charge power source and a controller, wherein he charge power source is configured to switch a voltage with the same polarity as an original charging polarity of a toner and a voltage with a polarity opposite to the original charging polarity of the toner and apply the voltages to a charge device, and the controller executes a control of switching a polarity of a voltage to be applied from the charge power source to the charge device from the opposite polarity to the same polarity before termination of secondary transfer of all of toner images in a job, and moving both a residual toner charged to the opposite polarity through application of the voltage with the opposite polarity and a residual toner charged to the same polarity through application of the voltage with the same polarity to an image bearing member.

Abstract: The image forming apparatus includes a control unit configured to selectively execute an operation for applying a voltage with a polarity opposite to an original charging polarity of a toner to a first charging member and a second charging member and an operation for applying a voltage with the polarity opposite to the original charging polarity of the toner to one of the first charging member and the second charging member and a voltage with the same polarity as the original charging polarity of the toner to another of the first charging member and the second charging member as a cleaning operation for charging a secondary transfer residual toner to the polarity opposite to the original charging polarity of the toner by using the first charging member and the second charging member to transfer the secondary transfer residual toner onto an image bearing member.

Abstract: The image forming apparatus includes a control unit that executes a supply operation to supply a toner charged with a regular charge polarity, to at least one abutting portion of a plurality of abutting portions, at the time of image non-formation, the plurality of abutting portions being formed by a plurality of cleaning members and a plurality of image bearing members, the control unit determining an image bearing member to which the most amount of the toner charged with the regular charge polarity is supplied, based on image formation information, the image formation information being information about an image formation executed before the supply operation is executed.

Abstract: An image forming apparatus includes: a transfer member that secondarily transfers a developer image primarily transferred to a intermediate transfer medium, to a recording medium; a charging member that charges residual developer remaining on the intermediate transfer medium after the developer image is secondarily transferred from the intermediate transfer medium to the recording medium; and a storage portion that stores information on a image bearing member. A bias applied to the charging member is changed based on the information when the residual developer charged by the charging member is collected by being transferred from the intermediate transfer medium to the image bearing member.

Abstract: A heater used for a fixing device includes a substrate, first and second conductor patterns formed at either end of the substrate in the short direction of the substrate, a third conductor pattern formed between the first and second conductor patterns and separated from the two conductor patterns, a first heating member disposed between the first and third conductor patterns and electrically connected to the two conductor patterns, and a second heating member disposed between the second and third conductor patterns and electrically connected to the conductor patterns. The heater has both end regions in which the widths of the third conductor pattern in the short direction is smaller than that of a middle portion of the third conductor pattern. The widths of the first and second heating members in the end regions are smaller than the widths of the first and second heating members in the other region, respectively.

Abstract: A heater used for a fixing device includes a substrate, first and second conductor patterns formed at either end of the substrate in the short direction of the substrate, a third conductor pattern formed between the first and second conductor patterns and separated from the two conductor patterns, a first heating member disposed between the first and third conductor patterns and electrically connected to the two conductor patterns, and a second heating member disposed between the second and third conductor patterns and electrically connected to the conductor patterns. The heater has both end regions in which the widths of the third conductor pattern in the short direction is smaller than that of a middle portion of the third conductor pattern. The widths of the first and second heating members in the end regions are smaller than the widths of the first and second heating members in the other region, respectively.

Abstract: A heater used for a fixing device includes a substrate, first and second conductor patterns formed at either end of the substrate in the short direction of the substrate, a third conductor pattern formed between the first and second conductor patterns and separated from the two conductor patterns, a first heating member disposed between the first and third conductor patterns and electrically connected to the two conductor patterns, and a second heating member disposed between the second and third conductor patterns and electrically connected to the conductor patterns. The heater has both end regions in which the widths of the third conductor pattern in the short direction is smaller than that of a middle portion of the third conductor pattern. The widths of the first and second heating members in the end regions are smaller than the widths of the first and second heating members in the other region, respectively.

Abstract: A pressure roller for use in a fixing device includes a core metal, an elastic layer, a releasing layer, and an adhesive layer configured to cause the elastic layer and the releasing layer to adhere to each other, wherein the adhesive layer contains monomer electrolyte.

Abstract: A heater used for a fixing device includes a substrate, first and second conductor patterns formed at either end of the substrate in the short direction of the substrate, a third conductor pattern formed between the first and second conductor patterns and separated from the two conductor patterns, a first heating member disposed between the first and third conductor patterns and electrically connected to the two conductor patterns, and a second heating member disposed between the second and third conductor patterns and electrically connected to the conductor patterns. The heater has both end regions in which the widths of the third conductor pattern in the short direction is smaller than that of a middle portion of the third conductor pattern. The widths of the first and second heating members in the end regions are smaller than the widths of the first and second heating members in the other region, respectively.

Abstract: A pressure roller for use in a fixing device includes a core metal, an elastic layer, a releasing layer, and an adhesive layer configured to cause the elastic layer and the releasing layer to adhere to each other, wherein the adhesive layer contains monomer electrolyte.