Abstract: An image forming device includes: image forming sections that form toner images with charged toners of respective colors on respective surfaces of image retainers; a transfer accepting body to whose surface the toner images are transferred electrostatically; transfer members that transfer the toner images to the transfer accepting body; a first charge applying section that switches, according to an instruction, between a first mode of applying the charge to all the transfer members and a second mode of applying the charge to apart of the transfer members; and a second charge applying section that applies, when the charge is applied in the second mode, a charge having the same polarity as that of the charged toners, to the transfer accepting body surface, at an applying point upstream from where the toner images are transferred to the transfer accepting body in a moving direction of the transfer accepting body.

Abstract: A warpage leveling unit includes a surface roughening member that is provided to oppose to a side end portion of an image carrier which has an endless-belt-shape, is entrained around a plurality of rollers, and carries an image on a surface of the image carrier, wherein the surface roughening member comes into contact with a surface of the side end portion which is warped.

Abstract: An image forming apparatus includes: an image carrier having an endless circumferential surface on which a latent image is formed due to an electrostatic potential difference; a developing device that attaches a toner to the image carrier to form a toner image; an endless intermediate transfer belt that is entrained around a plurality of roll members and moves circumferentially, and contacts the image carrier to transfer the toner image to the intermediate transfer belt; a transferring device that further transfers the toner image that has been transferred to the intermediate transfer belt, to a recording sheet; and a load applying member that cooperates with one of the roll members placed inside the intermediate transfer belt, to nip the intermediate transfer belt to apply a load to the intermediate transfer belt, the load applying member contacting a non-image region of the intermediate transfer belt.

Abstract: An image forming apparatus comprises a first image forming unit that transfers a base toner image formed on a first image carrier to an intermediate transfer member and forms an image and second image forming units that are plurally disposed downstream of the first image forming unit in a moving direction of the intermediate transfer member, transfer different color toner images formed on second image carriers to the intermediate transfer member and form images. The base toner image is formed beforehand in a single color region transferred onto the intermediate transfer member from the second image carriers of the second image forming units.

Abstract: An image forming device includes: image forming sections that form toner images with charged toners of respective colors on respective surfaces of image retainers; a transfer accepting body to whose surface the toner images are transferred electrostatically; transfer members that transfer the toner images to the transfer accepting body; a first charge applying section that switches, according to an instruction, between a first mode of applying the charge to all the transfer members and a second mode of applying the charge to apart of the transfer members; and a second charge applying section that applies, when the charge is applied in the second mode, a charge having the same polarity as that of the charged toners, to the transfer accepting body surface, at an applying point upstream from where the toner images are transferred to the transfer accepting body in a moving direction of the transfer accepting body.

Abstract: A cleaning device, comprises: a plurality of brush rolls being contact with a surface of the image carrier that a toner is attached; and a biasing unit applying bias voltages having different polarities from each other to at least two of the brush rolls, the plurality of brush rolls including a first brush roll and a second brush roll, a bias having a polarity opposite to a normal polarity of the toner being applied to the first brush roll, a bias having the same polarity as the normal polarity of the toner being applied to the second brush roll, a surface circulating speed of the first brush roll being set to be higher than the surface circulating speed of the second brush roll.

Abstract: An image forming apparatus includes: an image forming section that forms a plurality of images including an image of a low-gloss toner lower in glossiness than any other color toner and an image of a transparent toner; an intermediate transferer to which the plurality of images formed by the image forming section are transferred; and a control section that controls a position for forming the image of the transparent toner, so as to prevent the image of the transparent toner from being transferred under the image of the low-gloss toner on the intermediate transferer.

Abstract: An image forming apparatus includes: an image carrier having an endless circumferential surface on which a latent image is formed due to an electrostatic potential difference; a developing device that attaches a toner to the image carrier to form a toner image; an endless intermediate transfer belt that is entrained around a plurality of roll members and moves circumferentially, and contacts the image carrier to transfer the toner image to the intermediate transfer belt; a transferring device that further transfers the toner image that has been transferred to the intermediate transfer belt, to a recording sheet; and a load applying member that cooperates with one of the roll members placed inside the intermediate transfer belt, to nip the intermediate transfer belt to apply a load to the intermediate transfer belt, the load applying member contacting a non-image region of the intermediate transfer belt.

Abstract: An image forming apparatus includes an image carrier that holds a toner-image; an intermediate transfer member onto which the toner-image that has been held on the image carrier is transferred; a transfer unit that transfers onto a recording medium the toner-image that has been transferred onto the intermediate transfer member, the transfer unit transferring thereon a color-toner-image for checking toner-image, which has been formed in a non-image forming region on the intermediate transfer member; an application unit that applies an adhesion force reducing agent to a surface of the transfer unit before the color-toner-image for checking formed on the intermediate transfer member passes through the transfer unit, the adhesion force reducing agent reducing adhesion force to the transfer unit of the color-toner-image for checking; and a cleaning unit that removes the color-toner-image for checking that has been transferred onto the transfer unit and the adhesion force reducing agent.

Abstract: An image forming apparatus includes: an image carrier that holds a toner image; an intermediate transfer body to which the toner image carried on the image carrier is transferred; an applicator that applies a protective agent which blocks cracks in the surface of the intermediate transfer body to the intermediate transfer body; and a controller that changes, in accordance with the degree of damage to the surface of the intermediate transfer body, the amount of the protective agent to be applied by the applicator to the surface of the intermediate transfer body.

Abstract: A warpage leveling unit includes a surface roughening member that is provided to oppose to a side end portion of an image carrier which has an endless-belt-shape, is entrained around a plurality of rollers, and carries an image on a surface of the image carrier, wherein the surface roughening member comes into contact with a surface of the side end portion which is warped.

Abstract: An image forming apparatus comprises a first image forming unit that transfers a base toner image formed on a first image carrier to an intermediate transfer member and forms an image and second image forming units that are plurally disposed downstream of the first image forming unit in a moving direction of the intermediate transfer member, transfer different color toner images formed on second image carriers to the intermediate transfer member and form images. The base toner image is formed beforehand in a single color region transferred onto the intermediate transfer member from the second image carriers of the second image forming units.

Abstract: An image forming apparatus includes an image carrier that holds a toner-image; an intermediate transfer member onto which the toner-image that has been held on the image carrier is transferred; a transfer unit that transfers onto a recording medium the toner-image that has been transferred onto the intermediate transfer member; the transfer unit transferring thereon a color-toner-image for checking toner-image, which has been formed in a non-image forming region on the intermediate transfer member; an application unit that applies an adhesion force reducing agent to a surface of the transfer unit before the color-toner-image for checking formed on the intermediate transfer member passes through the transfer unit, the adhesion force reducing agent reducing adhesion force to the transfer unit of the color-toner-image for checking; and a cleaning unit that removes the color-toner-image for checking that has been transferred onto the transfer unit and the adhesion force reducing agent.

Abstract: An image forming apparatus includes: an image carrier that holds a toner image; an intermediate transfer body to which the toner image carried on the image carrier is transferred; an applicator that applies a protective agent which blocks cracks in the surface of the intermediate transfer body to the intermediate transfer body; and a controller that changes, in accordance with the degree of damage to the surface of the intermediate transfer body, the amount of the protective agent to be applied by the applicator to the surface of the intermediate transfer body.

Abstract: A cleaning device, comprises: a plurality of brush rolls being contact with a surface of the image carrier that a toner is attached; and a biasing unit applying bias voltages having different polarities from each other to at least two of the brush rolls, the plurality of brush rolls including a first brush roll and a second brush roll, a bias having a polarity opposite to a normal polarity of the toner being applied to the first brush roll, a bias having the same polarity as the normal polarity of the toner being applied to the second brush roll, a surface circulating speed of the first brush roll being set to be higher than the surface circulating speed of the second brush roll.

Abstract: An image forming apparatus capable of minimizing local degradation of the image carrier and effectively preventing image defects due to resistance reduction and adhesion of release agent, without lowering productivity. The image forming apparatus includes an image making unit, having an image carrier, with plural image carrying regions, the image making unit adapted to cause the image carrying regions on the image carrier to carry images and then to transfer the images onto the sheet in a series of image making cycles, and an image making controller for controlling the image making unit according to job commands for making images. The image making controller includes a reference signal changing circuit for changing reference signal for each job, and the reference signal determines which of the image carrying regions on the image carrier should be an image writing position.

Abstract: An image forming apparatus includes: a transfer unit T2 including the inside transfer roll 29, the outside transfer roll 30 transfers the toner image from the toner image holding belt B onto the recording sheet that passes through the transfer region Q4 when transfer voltage is applied to between the inside transfer roll 29 and the outside transfer roll 30; electric-field adjusting conductive member 51 disposed in proximity to and along the inner side of the toner image holding belt B leaving the transfer region Q4 at a position located downstream of the transfer region Q4; and electric-field adjust-potential applying means 53; 54 applies a potential, which weakens an electric field developed between the outside transfer roll 30 and the inside transfer roll 29 in a region located downstream of the transfer region Q4, to the electric-field adjusting conductive member 51.

Abstract: The present invention prevents a recording sheet from generating wrinkles, by expanding means having an inverted crown shape pressing roll or a special sheet shape discharge restraining baffle, at the nip portion, expanding the recording sheet toward the right and left sides from the central portion in the sheet moving direction, temporal adsorbing means having discharge-output control means for an adsorbing charger or a contact pressure adjustment mechanism of the pressing roll temporarily adsorbing, in the nip portion, the leading end of the recording sheet to the dielectric film with small adsorbing force, correction means having an outer roll and an inner roll or the like disposed between the recording-sheet adsorbing apparatus and a portion for electrostatically transferring a toner image disposed downstream from the recording-sheet adsorbing apparatus applying pressure to the dielectric film to which the recording sheet has been adsorbed so that a state of adsorption of the recording sheet before a firs

Abstract: An image formation apparatus for transporting a transfer material P and forming an image on the transfer material P is provided with an operation mode dedicated to transfer materials of a multilayer structure In the operation mode, setting of at least one operation condition of an attraction condition of the transfer material P on a transfer material support 8, a transfer condition of a toner image to the transfer material P, a peeling condition of the transfer material P from the transfer material support 8, a fixing condition of a toner image onto the transfer material P, and a static electricity elimination condition of an image support 1 or the transfer material support 8 is changed in response to the characteristics of a resistance value, etc., of the transfer material P.

Abstract: An image forming apparatus which forms an image by transferring a developed image formed on an image holding member onto a transfer material by a transfer unit. The image forming apparatus is further provided with an induced-charge density suppressing unit. This induced-charge density suppressing unit suppresses the density of electric charge induced in the area of the image holding member which is opposite to an image forming member as a result of stoppage of the image forming member that is opposite to the image holding member and is electrostatically charged.