Abstract: A fixing device includes a heating member that heats a recording medium having an image while transporting the recording medium by rotating; a measuring member that measures a temperature of the heating member and includes a body member, and a cantilever member whose base end is fixed to the body member and whose free end is in contact with the heating member; and a supporting member that supports the measuring member and includes a contact portion, the contact portion being in contact with a base portion of the cantilever member.

Abstract: An image forming apparatus includes a toner case and an attachment part. The toner case includes a case main body, a rotator, a transmitter and a moving mechanism. The rotator rotates around a rotation axis. At least apart of the rotator is stored in the case main body. The transmitter is arranged outside the case main body and has a transmitting coupling. The attachment part includes a manipulation member and a driving coupling. As the manipulation member moves from a first manipulating position to a second manipulating position in a state where the toner case is attached to the attachment part, the moving mechanism moves the transmitter from a first position to a second position which is arranged at an outside of the first position in a rotation axis direction of the rotator, and the transmitting coupling is coupled to the driving coupling.

Abstract: A photoreceptor includes: a cylindrical support on which a photosensitive layer is formed and to which a predetermined voltage is applicable; and a flange provided in an end portion of the support, the flange including a Helmholtz resonator including a cavity portion and a communication portion allowing the cavity portion and an outside to communicate with each other.

Abstract: An image forming apparatus includes: a first image forming unit which forms a first image on a first recording medium with a first material that is not thermally decolorizable; a second image forming unit which forms a second image on a second recording medium with a second material that is thermally decolorizable; a fixing device which is on a common carrying path shared by the first recording medium and the second recording medium and fixes the first image to the first recording medium; and a controller which controls the fixing device so that a temperature of the fixing device is lower than a decolorizing temperature of the second material when the second recording medium reaches the fixing device.

Abstract: An image forming apparatus includes a lower unit, an upper unit, and a coupling section. The upper unit is disposed on the lower unit. The coupling section couples the upper unit to the lower unit. The lower unit includes a first vertical plate member. The first vertical plate member is disposed in a rear position in the lower unit along a rear surface of the lower unit. The upper unit includes a second vertical plate member. The second vertical plate member is disposed in a rear position in the upper unit along a rear surface of the upper unit. The coupling section includes a plurality of engagement sections and a mating engagement section that engages with the engagement sections. The engagement sections are arranged along and supported on the second vertical plate member. The mating engagement section is elongated along and supported on the first vertical plate member.

Abstract: A developing sleeve includes first axially extending groove portions which satisfy D1?2R and W1?2R, where 2R is a volume-average particle size of a carrier, D1 is a maximum depth of each first groove portion and W1 is a width an opening of each first groove portion with respect to a circumferential direction of the developing sleeve, and second axially extending groove portions. Each second groove portion satisfies D2<2R, where 2R is the volume-average particle size of the carrier and D2 is a maximum depth of each second groove portion. Each or a plurality of the second groove portions are disposed between the first groove portions with respect to the circumferential direction of the developing sleeve.

Abstract: A developing cartridge has a casing accommodating toner therein; a developing roller rotatable about a first axis extending an axial direction; a cam electrically connected to the developing roller and rotatable about a second axis extending the axial direction from a first position to a second position, the cam being positioned at a third position distant from the casing by a first distance in the axial direction at the first position, and the cam being positioned at a fourth position distant from the casing by a second distance at the second position in the axial direction, the second distance being greater than the first distance; and a gear rotatable about the second axis, the gear engaging with the cam in a case where the cam is at the first position, and the gear disengaging from the cam in a case where the cam is at the second position.

Abstract: An image formation apparatus includes: a process device that forms a developer image; a transfer device that transfers the developer image formed by the process device onto a recording medium; a voltage applier that applies a voltage to the transfer device; and a voltage controller that acquires information on a width of the recording medium in a direction orthogonal to a medium conveyance direction, and controls the voltage applied by the voltage applier to the transfer device based on the width of the recording medium.

Abstract: An image forming apparatus includes a body casing, a pressing member, a process cartridge, and a drawer. The body casing includes a positioning member. The pressing member is disposed inside the body casing. The process cartridge includes a photosensitive drum. The drawer is configured to support the process cartridge and to move, in a sliding direction orthogonal to an axis direction of the photosensitive drum, between an inside position that is a position inside the body casing and an outside position that is a position outside the body casing. The process cartridge includes an engagement portion and a spring. The engagement portion is configured to be positioned by the positioning member. The spring is configured to be pressed by the pressing member such that the engagement portion is pressed toward the positioning member.

Abstract: An image forming apparatus, having a main body, a top cover, a first exposure device, a second exposure device, and a linkage mechanism, is provided. The top cover is pivotable about a first pivot axis. The first exposure device and the second exposure device are supported by the top cover pivotably about a second pivot axis and a third pivot axis, respectively. The second exposure device is at a position closer to the first pivot axis than the first exposure device. The linkage mechanism moves the first exposure device from a first retracted position toward a first exposing position and the second exposure device from a second retracted position toward a second exposing position in conjunction with the top cover moving between a first position and a second position. The linkage mechanism moves the first exposure device at a timing later than the second exposure device.

Abstract: Provided is a developer container, including: a frame body having an opening; a sealing member configured to seal the opening; an unsealing member configured to unseal the opening by moving the sealing member and accommodated inside the frame body; and a part of the sealing member peelably bonded to an outer peripheral edge of the opening on an opposite side of the unsealing member with respect to the opening.

Abstract: A developing unit configured for operating with a two-component developer material includes carrier particles to which the toner particles are adhered. The developing unit includes: at least one developer member rotatably mounted in the housing and configured for transferring toner particles to a photoconductor member, and a conveying assembly configured for conveying toner particles to the at least one developer member or away from the at least one developer member. The conveying assembly includes an auger and which includes a bar shaped shaft, a helical screw blade arranged around the shaft, and at least a first elongate element arranged at a distance of the shaft.

Abstract: An image forming apparatus includes: a fusing unit that heats a toner image and fixes the toner image on a recording medium; an exhaust passage that allows air heated by the fusing unit to flow and discharges the air to an outside of the apparatus; a delivery unit that moves the air in the exhaust passage in a discharge direction; a target structural component to which the air is to be delivered; a ventilation passage that connects a portion on a downstream side of the delivery unit of the exhaust passage in the discharge direction and the target structural component, and that allows the air to flow; and an adjuster that adjusts a passage through which the air flows, at a branch point between the exhaust passage and the ventilation passage.

Abstract: A belt device includes a belt member, a detected unit, a window, an optical detector, and a regulation member. The belt member is movable in a direction of belt movement. The detected unit disposed on at least one side of the belt in a width direction of the belt intersecting with the direction of belt movement and extending in the direction of belt movement. The window transmits detection light emitted toward the detected unit and reflected light from the detected unit. The optical detector detects the detected unit. The regulation member is disposed on at least one side in a width direction of the window to keep the detected unit away from the window.

Abstract: An information storage device installed in a removable device configured to be removably installed in an image forming apparatus body, includes: an information storage unit that stores information communicated between the image forming apparatus body and the removable device; a terminal that comes in contact with a body side terminal; and a substrate that holds the information storage unit and the terminal and includes a hole configured to be engaged with a protruding section installed in the image forming apparatus body. The terminal includes a plurality of terminals each including one of a plurality of metallic plates arranged in a transverse direction thereof. An earth terminal, which comes in contact with a body side earth terminal formed in the protruding section, is formed in the hole. The hole is disposed at a position sandwiched between two metallic plates among the plurality of metallic plates.

Abstract: A polishing unit is attached to an opening/closing cover included in a fixing device so as to polish a fixing belt. The polishing unit includes: a polishing unit body support member that is detachably attached to the opening/closing cover; and a polishing section that is held by the polishing unit body support member and that makes contact with the fixing belt so as to polish the fixing belt when the opening/closing cover is closed.

Abstract: In an axial direction of a developing sleeve that bears magnetic developer on an outer circumferential surface thereof, ends of a sheet-shaped stirring member that stirs the magnetic developer in a container frame to move the magnetic developer toward the developing sleeve are disposed on an outer side of a region in a magnetic field region generated by a magnet roller disposed on an inner side of the developing sleeve. The region has a magnetic field strength equal to or larger than a predetermined magnetic flux density at which the magnetic developer can be borne on the surface of the developing sleeve.

Abstract: A decoloring apparatus includes an erasing unit configured to generate heat so as to erase an image formed on a sheet with an erasable material, a sheet storing unit to store one or more sheets, each having the image formed thereon with the erasable material, a sheet conveying unit configured to convey the sheets from the sheet storing unit to the erasing unit, a quantity sensor configured to detect a quantity of the sheets stored in the sheet storing unit, and a control unit configured to determine whether or not the detected quantity is greater than a predetermined value, and control the sheet conveying unit to convey the sheets and the erasing unit to generate heat, when the detected quantity is determined to be greater than the predetermined value.

Abstract: An image forming apparatus in which a developer bearing member is disposed below a cleaning member, which cleans a charging member, so as to overlap with the cleaning member when viewed in a vertical direction and includes a base body and an elastic layer covering the base body and having a width in a longitudinal direction of the developer bearing member that accommodates the entire region of the cleaning member in the longitudinal direction. In the longitudinal direction, the cleaning member is disposed at a position where the entire region thereof in the longitudinal direction is accommodated in the width of the elastic layer.

Abstract: Provided is an electrophotographic photoreceptor 1 including the outer periphery of a cylindrical substrate 20, at least a photosensitive layer 21. One or more processed lines 20a are provided on one or both of end portions in the axial direction outside an image forming region of the outer peripheral surface of the substrate 20 along the circumferential direction. Also provided is an image forming apparatus including the electrophotographic photoreceptor.