Abstract: A developing unit includes a developer casing, a developer carrying member, and a receptacle. The developer carrying member is mounted on the developer casing. The receptacle is supported on the developer casing to be slidable linearly with respect to the developing casing, and is configured to accommodate a waste developer.

Abstract: A image forming device includes a main casing, a photosensitive-member unit including a plurality of photosensitive members aligned in a first direction, and a belt disposed in confrontation with the photosensitive members. The photosensitive-member unit is movable in the first direction with respect to the main casing, and is pulled out of the main casing when pulled in a pull-out direction parallel to the first direction. The photosensitive-member unit is provided with a cleaning member that is disposed on an upstream side of a most-upstream one of the photosensitive members with respect to the pull-out direction. The cleaning member slidingly contacts the belt when the photosensitive-member unit is moved with respect to the main casing. The cleaning member is located at a predetermined position separate from the belt when the photosensitive-member unit is at a mounting position within the main casing.

Abstract: A plurality of photosensitive bodies is juxtaposed in a conveying direction, in which a recording medium is conveyed, with confronting the conveying unit. Each of a plurality of developing units is configured to move between a first position where the developing unit is capable of supplying developer to the corresponding photosensitive drum and a second position where the developing unit separates from the corresponding photosensitive drum. A cleaning member is configured to move between a third position where the cleaning member is capable of collecting a waste developer deposited on the conveying unit and a fourth position where the cleaning member separates from the conveying unit. A receptacle is slidably supported on one of the developing units and accommodates the collected waste developer. The cleaning member moves integrally with the receptacle. The receptacle and the one of the developing units are integrally detachably mounted on the main casing.

Abstract: Provided is an image forming apparatus including an image forming section forming images on image forming faces of a recording medium, a condition setting section individually setting an operating condition of the image forming section for forming the image on a first image forming face of a recording medium and another operating condition of the image forming section for forming the image on a second image forming face of the recording medium opposite to the first image forming face in the manual duplex mode, and a control section controlling the image forming section on the basis of each operating condition set by the condition setting section.

Abstract: In an image forming apparatus, a first photoconductor drum for use in at least in a monochrome printing mode is located upstream, in a direction of transport of a medium, of a plurality of second photoconductor drums for use in a color printing mode. A transfer bias for each of transfer members is regulated in such a manner that a transfer bias applied in the monochrome printing mode between a second photoconductor drum located adjacently downstream of the first photoconductor drum and the corresponding transfer member is larger than that applied in the color printing mode. A developing bias for each of the development rollers is regulated in such a manner that an absolute value of a developing bias voltage applied to a development roller corresponding to the first photoconductor drum in the monochrome printing mode is smaller than that applied in the color printing mode.

Abstract: An image-forming apparatus includes an endless belt, a photosensitive member, a driving member, a recovering member, and a cleaning member. The endless belt has a surface extending in a first direction. The photosensitive member opposes the surface to provide the surface with toner. The driving member drives the belt so that the surface moves in the first direction during an image-forming period and moves in the opposite direction during a recovering period after the image-forming period. The recovering member recovers, during the image-formation period, residual toner remaining on the photosensitive member after the toner has been provided on the surface, and provides, during the recovering period, the recovered residual toner on the photosensitive member to be provided on the surface. The cleaning member opposes the surface upstream of the photosensitive member in the first direction to clean, during the recovering period, the recovered residual toner provided on the surface.

Abstract: An image forming apparatus includes first photosensitive members, first chargers for charging the first photosensitive members, developer carriers for supplying developer to the first photosensitive members, a first charging-bias applying unit that applies charging biases to the first chargers, development-bias applying units for applying development biases to the corresponding developer carriers, a charging-current sensing unit that separately senses a charging current flowing in each of the first chargers, and a control unit that controls the development biases based on the sensed charging current.

Abstract: An image forming apparatus includes a transfer bias set up section and a developing bias set up section. The transfer bias set up section sets a transfer bias applied to each transfer member so that the transfer bias applied to a transfer member corresponding to a photosensitive member on the most downstream side is greater than a transfer bias applied to a transfer member other than this transfer member. The developing bias set up section sets a developing bias applied to each developing member to a first developing bias in a single-side printing mode, and sets up the developing bias applied to each developing member in formation of an image on a first surface and in formation of another image on a second surface to a second developing bias lower than the first developing bias when the image formed on the second surface is a color image.

Abstract: An image forming apparatus includes: a first photosensitive drum for a monochrome printing mode; second and third photosensitive drums for a color printing mode; a moving unit moving a medium from the first photosensitive drum via the second photosensitive drum to the third photosensitive drum; charger devices for charging the photosensitive drums; transfer devices for transferring developer images on the photosensitive drums to the medium; and a control unit configured to control charging biases of the charger devices and transfer biases of the transfer devices. The control unit executes, in the monochrome printing mode, an energy saving control in which absolute value of charging bias applied to the charger device for the third photosensitive drum is smaller than an absolute value of a charging bias applied to the charger device corresponding to the second photosensitive drum.

Abstract: Provided is an image forming apparatus including an image forming section forming images on image forming faces of a recording medium, a condition setting section individually setting an operating condition of the image forming section for forming the image on a first image forming face of a recording medium and another operating condition of the image forming section for forming the image on a second image forming face of the recording medium opposite to the first image forming face in the manual duplex mode, and a control section controlling the image forming section on the basis of each operating condition set by the condition setting section.

Abstract: An image forming apparatus includes: photosensitive members; an endless belt facing the photosensitive members; developing rollers respectively supplying, to the photosensitive members, developer of different colors which is charged to a first polarity; cleaning rollers adjacent to the photosensitive members; a separating mechanism separating the developing roller from the photosensitive member in a single color printing. If in a multi color printing, a control unit applies a cleaning bias whose polarity is a second polarity opposite to the first polarity and which holds a first electric potential to each cleaning roller. If in the single color printing, the control unit executes a bias reduction control in which a cleaning bias applied to the cleaning roller not used in the single color printing is given the second polarity and is made to hold a second electric potential whose absolute value is smaller than that of the first electric potential.

Abstract: Provided is an image forming apparatus including an image forming section forming images on image forming faces of a recording medium, a condition setting section individually setting an operating condition of the image forming section for forming the image on a first image forming face of a recording medium and another operating condition of the image forming section for forming the image on a second image forming face of the recording medium opposite to the first image forming face in the manual duplex mode, and a control section controlling the image forming section on the basis of each operating condition set by the condition setting section.

Abstract: A image forming device includes a main casing, a photosensitive-member unit including a plurality of photosensitive members aligned in a first direction, and a belt disposed in confrontation with the photosensitive members. The photosensitive-member unit is movable in the first direction with respect to the main casing, and is pulled out of the main casing when pulled in a pull-out direction parallel to the first direction. The photosensitive-member unit is provided with a cleaning member that is disposed on an upstream side of a most-upstream one of the photosensitive members with respect to the pull-out direction. The cleaning member slidingly contacts the belt when the photosensitive-member unit is moved with respect to the main casing. The cleaning member is located at a predetermined position separate from the belt when the photosensitive-member unit is at a mounting position within the main casing.

Abstract: An image forming apparatus may be provided with a belt configured to move in the predetermined direction and face a photoreceptor, a charge removal member, and a conductive member. The charge removal member may be configured to remove charge of the belt. The conductive member may be located at the downstream side of the charge removal member in the predetermined direction. The conductive member may include a surface facing the belt.

Abstract: An image forming device performs an image forming operation in either one of a color mode or a monochrome mode. The image forming device includes a plurality of photosensitive members, a plurality of collecting members configured to collect excrescences from the corresponding photosensitive members, and a reverse-transfer member that performs a reverse-transfer operation to transfer the excrescences collected by the collecting members back onto the photosensitive members and further onto an endless bearing member. A control unit controls the reverse-transfer member to perform the reverse-transfer operation at a frequency when image forming operations are performed in succession in the monochrome mode. The control unit sets the frequency based on an image forming condition.

Abstract: In an image forming apparatus, a first photoconductor drum for use in at least in a monochrome printing mode is located upstream, in a direction of transport of a medium, of a plurality of second photoconductor drums for use in a color printing mode. A transfer bias for each of transfer members is regulated in such a manner that a transfer bias applied in the monochrome printing mode between a second photoconductor drum located adjacently downstream of the first photoconductor drum and the corresponding transfer member is larger than that applied in the color printing mode. A developing bias for each of the development rollers is regulated in such a manner that an absolute value of a developing bias voltage applied to a development roller corresponding to the first photoconductor drum in the monochrome printing mode is smaller than that applied in the color printing mode.

Abstract: A color image forming apparatus is described. The color image forming apparatus may includes: a belt that travels in a prescribed direction; a plurality of image carriers arranged in parallel in the prescribed direction, and opposed to the belt and carrying developing agent images of different colors respectively; a backup roller arranged in opposed relation to the belt; a cleaning roller arranged in opposed relation to the backup roller with the belt sandwiched therebetween, and adsorbing an adherent to the belt by a potential difference produced between the backup roller and the cleaning roller; and a discharge member opposed to the belt between a position more downstream in the prescribed direction than a position where the cleaning roller is opposed to the belt and a position more upstream in the prescribed direction than a position where the image carrier arranged on the most upstream side in the prescribed direction is opposed to the belt, for discharging the belt.

Abstract: A plurality of photosensitive bodies is juxtaposed in a conveying direction, in which a recording medium is conveyed, with confronting the conveying unit. Each of a plurality of developing units is configured to move between a first position where the developing unit is capable of supplying developer to the corresponding photosensitive drum and a second position where the developing unit separates from the corresponding photosensitive drum. A cleaning member is configured to move between a third position where the cleaning member is capable of collecting a waste developer deposited on the conveying unit and a fourth position where the cleaning member separates from the conveying unit. A receptacle is slidably supported on one of the developing units and accommodates the collected waste developer. The cleaning member moves integrally with the receptacle. The receptacle and the one of the developing units are integrally detachably mounted on the main casing.

Abstract: An electrophotographic image forming apparatus is provided. The image forming apparatus includes an image forming unit configured to form an image on a recording medium; a fixing unit configured to fix the image onto the recording medium by applying heat and pressure; a re-transport unit configured to re-transport the recording medium which has passed through the fixing unit, to the image forming unit along a re-transport path; a cooling unit provided between the fixing unit and the image forming unit along the re-transport path and configured to cool the recording medium transported by the re-transport unit; a parameter signal output unit configured to output a signal corresponding to a parameter for controlling the cooling unit; and a controller configured to control the cooling unit according to the signal output from the parameter signal output unit.

Abstract: An image-forming apparatus includes an endless belt, a photosensitive member, a driving member, and a recovering member, and a cleaning member. The endless belt is circularly movable and has a surface extending in a first direction. The photosensitive member is opposed to the surface to provide the surface with a toner. The driving member drives the endless belt so that the surface moves in the first direction during an image-forming period and moves in a second direction opposite to the first direction during a recovering period posterior to the image-forming period. The recovering member recovers, during the image-formation period, a first residual toner remaining on the photosensitive member after the toner has been provided on the surface, and provides, during the recovering period, the recovered first residual toner on the photosensitive member to be provided on the surface.