Abstract: An image forming apparatus includes a count section configured to count time during which no image forming is performed and a control section configured to allow heating of a heat generating section at temperature for decolorizing after the time counted by the count section reaches the a predetermined threshold time.

Abstract: According to one embodiment, an image forming apparatus includes an image forming portion configured to selectively form a toner image on an image bearing member using a developing device including a decolorizable toner or a developing device including an undecolorizable toner, a transfer portion configured to transfer the toner image, which is formed on the image bearing member, onto a transfer material, and a fixing portion configured to fix the toner image, which is transferred by the transfer portion, on the transfer material. The undecolorizable toner has at least a fixing temperature range in a range equal to or higher than a fixing temperature lower limit of the decolorizable toner and lower than decoloring temperature of the decolorizable toner.

Abstract: An image forming apparatus includes a count section configured to count time during which no image forming is performed and a control section configured to allow heating of a heat generating section at temperature for decolorizing after the time counted by the count section reaches the a predetermined threshold time.

Abstract: An image forming apparatus includes a count section configured to count time during which no image forming is performed and a control section configured to allow heating of a heat generating section at temperature for decolorizing after the time counted by the count section reaches the a predetermined threshold time.

Abstract: According to one embodiment, an image forming apparatus includes an image forming portion configured to selectively form a toner image on an image bearing member using a developing device including a decolorizable toner or a developing device including an undecolorizable toner, a transfer portion configured to transfer the toner image, which is formed on the image bearing member, onto a transfer material, and a fixing portion configured to fix the toner image, which is transferred by the transfer portion, on the transfer material. The undecolorizable toner has at least a fixing temperature range in a range equal to or higher than a fixing temperature lower limit of the decolorizable toner and lower than decoloring temperature of the decolorizable toner.

Abstract: An image forming apparatus includes an image carrier whose surface is moved in a specific direction, a charging device to charge the image carrier, an exposure device to form an electrostatic latent image by exposing a surface of the charged image carrier, a developing device to supply a developer to the image carrier on which the electrostatic latent image is formed, a transfer device to transfer a developer image formed on the surface of the image carrier onto an image forming medium, and a dielectric member that extends from the charging device to the vicinity of the image carrier and is disposed between the charging device and the image carrier surface part exposed by the exposure device, in which the charging device, the exposure device, the developing device and the transfer device are sequentially arranged around the image carrier along the movement direction of the surface of the image carrier.

Abstract: An image forming apparatus includes an image carrier whose surface is moved in a specific direction, a charging device to charge the image carrier, an exposure device to form an electrostatic latent image by exposing a surface of the charged image carrier, a developing device to supply a developer to the image carrier on which the electrostatic latent image is formed, a transfer device to transfer a developer image formed on the surface of the image carrier onto an image forming medium, and a dielectric member that extends from the charging device to the vicinity of the image carrier and is disposed between the charging device and the image carrier surface part exposed by the exposure device, in which the charging device, the exposure device, the developing device and the transfer device are sequentially arranged around the image carrier along the movement direction of the surface of the image carrier.

Abstract: An image forming apparatus according to an embodiment includes: an image carrier; a transfer device which transfers a toner image formed on the image carrier onto a recording medium; a resistance measuring device which causes a current to flow through the recording medium before transferring the toner image and measures the resistance of the recording medium; and a setting unit which sets a condition of the transfer on the basis of the measurement result of the resistance of the recording medium. The resistance measuring device includes an electric shock prevention member which prevents the current from flowing to a user through the recording medium during the measurement of the resistance of the recording medium.

Abstract: An image forming apparatus includes an image carrier whose surface is moved in a specific direction, a charging device to charge the image carrier, an exposure device to form an electrostatic latent image by exposing a surface of the charged image carrier, a developing device to supply a developer to the image carrier on which the electrostatic latent image is formed, a transfer device to transfer a developer image formed on the surface of the image carrier onto an image forming medium, and a dielectric member that extends from the charging device to the vicinity of the image carrier and is disposed between the charging device and the image carrier surface part exposed by the exposure device, in which the charging device, the exposure device, the developing device and the transfer device are sequentially arranged around the image carrier along the movement direction of the surface of the image carrier.

Abstract: An image forming apparatus includes an image carrier whose surface is moved in a specific direction, a charging device to charge the image carrier, an exposure device to form an electrostatic latent image by exposing a surface of the charged image carrier in accordance with an image signal, a developing device to supply a developer to the surface of the image carrier on which the electrostatic latent image is formed, a transfer device to transfer a developer image formed on the surface of the image carrier onto an image forming medium, and a dielectric member that has a dielectric constant of 5 or less and is disposed near the image carrier and between the charging device and the exposure device, in which the charging device, the exposure device, the developing device and the transfer device are sequentially arranged around the image carrier along the movement direction of the surface of the image carrier.

Abstract: An image forming apparatus includes a count section configured to count time during which no image forming is performed and a control section configured to allow heating of a heat generating section at temperature for decolorizing after the time counted by the count section reaches the a predetermined threshold time.

Abstract: According to one embodiment, an image forming apparatus includes an image forming portion configured to selectively form a toner image on an image bearing member using a developing device including a decolorizable toner or a developing device including an undecolorizable toner, a transfer portion configured to transfer the toner image, which is formed on the image bearing member, onto a transfer material, and a fixing portion configured to fix the toner image, which is transferred by the transfer portion, on the transfer material. The undecolorizable toner has at least a fixing temperature range in a range equal to or higher than a fixing temperature lower limit of the decolorizable toner and lower than decoloring temperature of the decolorizable toner.

Abstract: The image forming apparatus according to the embodiment includes a display section configured to display information or an inquiry, an input section configured to receive an input from the operator; and a control section configured to display, when the sheet jam occurs, an inquiry concerning a situation of the occurrence of the sheet jam on the display section and a method to eliminate a cause of the sheet jam estimated on the basis of input in response to the displayed inquiry.

Abstract: An image forming apparatus that transfers a toner image from includes a transfer belt to a sheet via to carry a toner image, a transfer roller. The image forming apparatus transfers the toner image by applying a transfer bias voltage to either the transfer roller or to make contact with the transfer belt to transfer the toner image onto a sheet from the transfer belt, an opposite roller facing the transfer roller across the transfer belt. The transfer bias voltage is decided by adding a transfer roller correction voltage, based on a voltage detected by a voltage detection unit when a predetermined current is applied to either the transfer roller or the opposite roller by a current application unit when no sheet is present in a transfer position, and a sheet correction voltage, based on a sheet kind and an intra-apparatus humidity.

Abstract: An image forming apparatus according to an embodiment includes: an image carrier; a transfer device which transfers a toner image formed on the image carrier onto a recording medium; a resistance measuring device which causes a current to flow through the recording medium before transferring the toner image and measures the resistance of the recording medium; and a setting unit which sets a condition of the transfer on the basis of the measurement result of the resistance of the recording medium. The resistance measuring device includes an electric shock prevention member which prevents the current from flowing to a user through the recording medium during the measurement of the resistance of the recording medium.

Abstract: An image forming apparatus includes an image carrier whose surface is moved in a specific direction, a charging device to charge the image carrier, an exposure device to form an electrostatic latent image by exposing a surface of the charged image carrier in accordance with an image signal, a developing device to supply a developer to the surface of the image carrier on which the electrostatic latent image is formed, a transfer device to transfer a developer image formed on the surface of the image carrier onto an image forming medium, and a dielectric member that has a dielectric constant of 5 or less and is disposed near the image carrier and between the charging device and the exposure device, in which the charging device, the exposure device, the developing device and the transfer device are sequentially arranged around the image carrier along the movement direction of the surface of the image carrier.

Abstract: According to one embodiment, a method of setting, when at least one of image forming units does not perform image formation, an electric field between an image carrier and a transfer device of the image forming unit which does not perform the image formation to have the same direction as that of an electric field between the image carrier and the transfer device which perform the image formation and have a lower strength can be obtained.

Abstract: An image forming apparatus includes a developing contrast voltage controller to control a developing contrast voltage so as to obtain a desired image density, a transfer condition controller to control transfer conditions for transferring a toner image, an environment sensor to detect an environment, and a correcting coefficient setting unit to refer to a database for pre-registering correcting coefficients to correct the transfer conditions corresponding to the developing contrast voltage and environment and set the correcting coefficients on the basis of the developing contrast voltage controlled by the developing contrast voltage controller and the environment detected by the environment sensor.

Abstract: When image adjustment is performed, patterns are formed under an image formation condition within a range in which a problem does not occur in registration adjustment. Formed patterns are detected and the registration adjustment is performed. After the registration adjustment is performed and the charge amount of a developer becomes stable, image quality adjustment for the time of image formation is performed.

Abstract: An image forming apparatus according to one embodiment of the invention includes an image carrier and a cleaning device for cleaning a developer left on a surface of the image carrier. Further, the cleaning device includes: a casing having a rotational shaft; a pressurizing member for applying a force about the rotational shaft to the casing; a cleaning member fixed to the casing for cleaning the developer left on the surface of the image carrier by pressing against the surface by the force about the rotational shaft; a transporting mechanism for transporting the developer in the casing to a position outside of the casing; and a drive mechanism for providing a driving force to the transporting means, and a direction of the driving force is a direction from an application point of the driving force substantially toward a rotational support of the rotational shaft or a direction opposite thereto.