Abstract: A toner supply device including a casing and a shutter member. The casing includes a toner container for containing toner, a discharge aperture for discharging the toner from the toner container, and an aperture. The shutter member includes an elastic part having at least one bending portion and the elastic part is elastically deformable. The shutter member is insertable into the casing through the aperture to be movable between a closed position at which the discharge aperture is closed and an opened position at which the discharge aperture is opened while the elastic part is kept elastically deformed.

Abstract: A powder container which is mounted on an image-forming apparatus body, and houses a powder includes a container body configured to carry the powder housed inside thereof from a first end side to a second end side by rotating, and discharge the powder outside from the second end side, a gear formed in an outer circumference of the container body, and a cover which is mounted on the gear to cover at least a tooth section of the gear.

Abstract: A developer conveyance apparatus for an image forming apparatus includes a developer storage portion configured to store developer, a developer conveyance portion arranged inside the developer storage portion and configured to convey the developer through rotation, a drive input portion configured to input a drive force to the developer conveyance portion, and a clutch arranged inside the developer storage portion and configured to transmit the drive force from the drive input portion to the developer conveyance portion, the clutch stopping or decelerating a rotation of the developer conveyance portion when a requisite torque for rotating the developer conveyance portion exceeds a predetermined magnitude, wherein the clutch is arranged inside the developer storage portion and includes at least one clutch side conveyance portion which, when receiving the drive force from the drive input portion, conveys the developer in a developer conveyance direction in which the developer conveyance portion conveys the deve

Abstract: A toner cartridge, a main casing accommodates therein toner and is formed with an opening which provides communication between an interior and an exterior of the main casing. A shutter is movable along the main casing by an external driving force applied in a force direction between a closed position at which the shutter closes the opening and an open position at which the shutter opens the opening. A toner seal is formed with a seal opening opposing the opening of the main casing, and interposed between the main casing and the shutter when the shutter is positioned at the closed position. A guide portion is configured to guide a movement of the shutter in an inclined direction inclined with respect to the force direction.

Abstract: A toner supplying device including a secondary toner container, a first feeding member performing a first feeding operation of feeding toner from a toner container to the secondary container on demand, a second feeding member performing a second feeding operation of feeding the toner from the secondary container to a developing device on demand, and a toner supply controller controlling the amount of the toner in the secondary container to be greater than a predetermined amount. The controller performs first control in which when the first feeding operation is performed, the amount of the toner fed in the second feeding operation per unit of time is decreased, or second control in which when the amount of the toner fed in the second feeding operation is greater than a predetermined amount, the amount of the toner fed in the first feeding operation per unit of time is decreased.

Abstract: A toner cartridge for an electrophotographic image forming device according to one example embodiment includes a housing having a top, a bottom, a front, and a rear positioned between a first side and a second side of the housing. The housing has an elongated shape extending from the first side to the second side. The housing defines a reservoir for containing toner therein. An exit port on the front of the housing is in fluid communication with the reservoir. A port surface surrounding the exit port is positioned to seal against a corresponding surface when the toner cartridge is installed in the image forming device. The port surface is angled upward with respect to the bottom of the housing and faces generally downward.

Abstract: Provided is an image forming apparatus including an apparatus main body, an operation member, a toner container, a shutter, and an interlocking mechanism. The operation member is a member for turning on and off a power supply of the apparatus main body, and takes an ON posture and an OFF posture. The toner container is a container configured to store the toner and including an opening section configured to allow communication between the inside and the outside of the container. The shutter can take an opening posture for opening the opening section and a closing posture for closing the opening section. The interlocking mechanism interlocks the posture of the operation member and the posture of the shutter to set the shutter in the opening posture when the operation member takes the ON posture and to set the shutter in the closing posture when the operation member takes the OFF posture.

Abstract: A toner-container support unit is provided. The toner-container support unit includes: a toner container housing toner; a container mount including an internal space to accommodate the toner container; a toner-container receiver which is provided on an internal end side of the internal space of the container mount; a positioning hole formed on the back end surface of the toner container; a positioning pin provided in the toner-container receiver; a retracting assembly retracing a back end portion of the toner container to the toner-container receiver side when inserting the toner container into the container mount; and an inclination stopper which prevents the inclination of the toner container when the back end portion of the toner container is retracted by the retracting assembly toward the toner-container receiver.

Abstract: An image forming apparatus includes a driving motor, a gear mechanism including a drive gear rotated by driving force of the driving motor and a slave gear meshed with the drive gear, to transmit the driving force to an object, one of the drive gear and the slave gear including a toothless portion without the gear tooth, formed on a circumferential edge of the corresponding gear, a control unit, a detection unit that detects a driving current for the driving motor when the driving motor is working, a decision unit that decides whether the driving current detected by the detection unit is below a predetermined threshold, and a calculation unit that counts the number of times that the decision unit has decided that the driving current is below the threshold, and calculates an amount of movement of the slave gear on the basis of the number of times counted.

Abstract: A developer accommodation unit includes a developer accommodation part that accommodates a developer, an opening part that communicates with the developer accommodation part, a shutter member that is movable between an opened position and a closed position with respect to the opening part, a rotation body that is provided rotatable in the developer accommodation part, and a drive force transmission mechanism that transmits a drive force to the rotation body so that the rotation body rotates. The drive force transmission mechanism includes an engagement mechanism by which the drive force is transmitted to the rotation body when the shutter member is in the opened position.

Abstract: A developing device includes a development roller, a magnetic roller, a transformer, a switching portion, output control portion and a capacitor. The development roller is opposite a photoconductor drum. The magnetic roller performs, with a magnetic brush, the supply of a toner to the development roller and the removal of the toner. The transformer generates an alternating-current voltage applied to the development roller. The switching portion passes and interrupts a current to the transformer. The output control portion stepwise changes, when a duty ratio in switching is changed, the duty ratio a plurality of times from a first duty ratio to a second duty ratio. The capacitor has one end connected to the transformer and the other end connected to the switching portion.

Abstract: A toner container for accommodating toner, includes a first opening through which the toner is passable; a toner feeding member for feeding the toner to the first opening by reciprocating motion toward and away from the first opening; an urging member for urging the toner feeding member; a movable member movable between a position for moving the toner feeding member against an urging force of the urging member and a position for permitting the toner feeding member to move by the urging force of the urging member; a second opening for permitting the urging member and the toner feeding member to pass into the toner container to install them in the toner container; and a cap for closing the second opening.

Abstract: A developing device includes a developer carrying member for carrying developer containing a non-magnetic toner and a magnetic carrier to a position where the developer carrying member is opposed to an image bearing member, and a developing container including a first chamber for accommodating the developer to be supplied to the developer carrying member, a second chamber provided below the first chamber, and an opening for circulating the developer between the first chamber and the second chamber. In addition, a first feeding member and a second feeding member are rotatably provided in the first chamber and the second chamber, respectively, for stirring and feeding the developer.

Abstract: A toner cartridge according to one example embodiment includes a housing that defines a reservoir for containing toner. An exit port in fluid communication with the reservoir faces downward on the front of the housing near a first side. A shutter positioned at the exit port is movable between an open position and a closed position. A toner delivery system for transferring toner from the reservoir includes a main interface gear exposed on the front of the housing near the top of the second side. A rearward facing opening is positioned near the first side of the housing for receiving a first engagement feature in an image forming device for opening and closing the shutter. A forward facing slot is positioned near the first side of the housing for receiving a second engagement feature in the image forming device for locking and unlocking the shutter.

Abstract: A development apparatus includes a developer bearing member which develops a latent image, a first room supplying developer to the developer bearing member, and a second room connecting to the first room via opening portions formed at both ends of the first room, with the first room and the second room forming a circulation passage circulating the developer. In addition, a partition wall partitions the first room and the second room, a replenishment passage connects outside of the circulation passage and replenishes the developer, and a discharge port discharges surplus developer from the development container. A replenishing screw is arranged in the replenishment passage and conveys developer in a replenishing port toward the circulation passage, and a ventilation port is formed at a replenishing port side outside of the circulation passage of the first room or the second room or inside of the replenishment passage.

Abstract: A toner cartridge for use in an image forming device according to one example embodiment includes a housing having a reservoir for containing toner therein. The housing has an exit port in fluid communication with the reservoir to permit toner from the reservoir to pass out of the housing. A first leg and a second leg each project from a bottom portion of the housing to limit the side-to-side travel of the toner cartridge during insertion into the image forming device. Wing guides are positioned on opposite side surfaces of the housing. A stop extends from each wing guide to limit the forward travel of the toner cartridge in the image forming device. Rounded projections extending from the bottom surfaces of the wing guides define contact points to control the vertical position of the toner cartridge in the image forming device.

Abstract: A rotating cover on the developer unit of an imaging apparatus to prevent toner leaks from the toner entry port of the developer unit. When installing a toner cartridge, the cartridge contacts a surface to cause the cover to rotate to an open position, thereby exposing the toner port for receiving toner. Conversely, when the toner cartridge is removed the cover is rotated into a closed position with the aid of a torsion spring so as to seal the toner entry port of the developer unit.

Abstract: In a transport pipe having a first opening portion through which toner is fed in from a toner hopper and a second opening portion through which the toner is discharged to a development device, a transport screw in which a helical blade is formed on a rotational shaft is rotatably provided. The width of the first opening portion in the direction of the rotational shaft is greater than the pitch (L0) of the blade at the first opening portion, and, at the downstream end of the first opening portion in the transport direction, the pitch of the blade is switched from the pitch (L0) to a pitch (L1) which is narrower than the pitch (L0). In this way, the amount of transport of the toner from the toner hopper to the development device with the transport screw is stabilized.

Abstract: An image forming apparatus includes a forced toner consumption controller which executes a forced toner consumption control; a toner supply controller which executes a toner supply control; and a pre-job controller which, upon receipt of an image forming job, and before the start of the job, acquires a toner consumption index value, determines a specific target image density based on the acquired index value, executes a previous toner consumption and supply control including the forced toner consumption control and the toner supply control that makes a toner concentration in a developer of a development device subjected to the forced toner consumption control approach a specific target toner concentration, and then executes a previous image density adjustment control that adjusts one or more image forming conditions to make an image density after the previous toner consumption and supply control approach the specific target image density.

Abstract: A drive transmission structure includes a driven shaft, a drive shaft, and a bearing member. The driven shaft has a drive receiving gear attached thereto and a first shaft portion near the drive receiving gear, to which a rotational force is transmitted. The drive shaft has a drive transmitting gear attached thereto and a second shaft portion near the drive transmitting gear. The drive transmitting gear is engaged with the drive receiving gear so as to transmit the rotational force. The bearing member has a first bearing and a second bearing, which respectively support the first shaft portion and the second shaft portion. In the drive transmission structure, the axis of the drive shaft does not intersect and is non-parallel to the axis of the driven shaft, and the first and second bearings are integrally formed with the bearing member.

Abstract: A toner supply device includes a toner storage section including plural toner containing sections and a dividing part, the plural toner containing sections being arranged from an upstream side to a downstream side in a toner feeding direction and including respective rotating members configured to rotate to feed the toner, the dividing part being formed between the toner containing sections adjacent to each other and including an upper end part. Further, a position of the upper end part of the dividing part is higher than a position of a rotational center of the rotating member included in the toner containing section on the upstream side in the toner feeding direction of the toner containing sections adjacent to each other.

Abstract: The image forming apparatus (1) includes a toner cartridge (71) between a front frame (78) or an front inside cover (79) and a front housing, and a cartridge attaching section (65) includes a shutter stopping section (65i) for opening a shutter (71c) by attachment of the toner cartridge (71) to the toner cartridge attaching section (65), and an IC chip fitting section (65c) to which an IC chip (75) is attached.

Abstract: In an image forming apparatus, a fixing drive motor is positioned inside the image forming apparatus and closely to the front surface of the image forming apparatus so as to be laterally to toner cartridges and a waste toner box in a direction parallel to an outer surface of a front housing section.

Abstract: The developer container includes a rotator that is rotated in the container body, a sequence of gears disposed outside the developer container that transmits a torque to the rotator, and a container guiding portion that fits with a main body side guiding portion and guides the developer container in a direction in which the developer container is attached to a mounting portion of an image forming device main body. A first gear included in the sequence of the gears is movable between an operating position where the first gear engages with a second gear and a retracted position where the first gear is retracted. On a surface on which the container guiding portion is disposed, a part of the container guiding portion is disposed within a projected area of the first gear being disposed at the operating position.

Abstract: A developer supply cartridge detachably mountable to a main assembly of an image forming apparatus includes: a developer accommodating portion; a shutter portion movable between a closed position and an open position; and a movable portion for moving the shutter portion. The movable portion is movable between a first position where the shutter portion is positioned in the closed position. The movable portion performs a preventing operation for preventing movement thereof to the first position by engagement thereof with an engaging portion, provided in the main assembly side, when the movable portion is positioned in the second position during movement of the developer supply cartridge to the main assembly.

Abstract: A toner cartridge having a pressure equalization system for equalizing a pressure differential between a toner reservoir in the toner cartridge and a toner sump developer unit containing ingested air utilizing a ducted shutter that opens and closes an exit port on the housing of the toner cartridge in combination with a passageway in fluid communication with the ducted shutter and the toner reservoir wherein, when the toner cartridge is mated with a developer unit of the imaging apparatus and the shutter is in the open position, exiting toner leaves the cartridge through the exit port and enters the developer unit while air entrained within the developer unit enters the toner reservoir via the exit port, the duct and the passageway equalizing pressure between the toner cartridge and the to developer unit.

Abstract: An image reading apparatus comprising: a reading unit; a feeding unit; a carriage; a motor-side transmission gear for transmitting power from a motor; a feeding unit-side transmission gear for transmitting the power to the feeding unit in a feeding reading of reading an image of the document fed by the feeding unit; a carriage-side transmission gear for transmitting the power to the carriage in a moving reading of reading an image of the document while moving the carriage; a switching gear configured to be switched between a feeding unit-side position and a carriage-side position; a sensor; and a control device configured to, when it is determined that the jam has occurred, drive the motor in a direction of releasing a meshed state between the feeding unit-side transmission gear and the switching gear.

Abstract: A powder conveying apparatus includes a powder containing unit that contains powder and at least a portion of which is deformable; a discharging unit that discharges the powder from the powder housing unit to an outside; a delivery member that moves toward the discharging unit side while pushing the deformable portion of the powder containing unit inward to thereby convey the powder to the discharging unit; and an oscillation applying unit that applies oscillation to the discharging unit. Driving of the oscillation applying unit is controlled in response to an operation of the delivery member.

Abstract: An image forming apparatus includes a toner case, an apparatus main body, and a cover. The toner case includes a case main body, a shutter, and an operation part. The case main body has a discharge port discharging a toner. The shutter opens/closes the discharge port. The operation part is connected to the shutter. The operation part is movable between a port closing position where the operation part makes the shutter close the discharge port and interferes with the cover and an port opening position where the operation part makes the shutter open the discharge port and permits the cover to be closed. When the cover is closed in the state in which the operation part is located at the port closing position, the cover presses the operation part and the operation part moves from the port closing position to the port opening position.

Abstract: A developer supplier for supplying a developer to each of a plurality of developing devices, includes a plurality of developer supplying units each configured to supply a developer in which a toner and a carrier are preliminarily dispersed at a given concentration to each of the plurality of developing devices. A proportion of the carrier included in the developer which is supplied to one of the plurality of developing devices is set so as to be greater than a proportion of the carrier included in the developer which is supplied to the another one of the plurality of developing devices.

Abstract: This developing apparatus includes a toner supply passage for supplying new toner fed from a toner cartridge to a toner carrying region where a toner carrier is arranged, and the toner supply passage is provided with a backflow prevention portion for preventing old toner from backflowing toward the toner cartridge.

Abstract: A powder feeding device includes a powder container, a feeding tank in communication with the powder container, a negative pressure room in communication with the feeding tank via a suction port communicating tube; an air suction device in communication with the negative pressure room via a negative pressure room communication tube; a suction port opening and closing unit that opens and closes the suction port communicating tube; a negative pressure room opening and closing unit that opens and closes of the negative pressure room communication tube; an output port opening and closing unit that opens and closes an output port of the feeding tank; and a controller that performs negative pressure generation control, powder supply control, and powder discharge control. Further, the controller simultaneously starts the negative pressure generation control and the powder discharge control.

Abstract: A printing apparatus that executes printing by using a recording material includes an accepting unit which accepts an instruction from a user, a receiving unit which receives a command from an external device, a first shifting unit to shift the printing apparatus to a state in which the user can supply the recording material according to the instruction accepted by the accepting unit, and a second shifting unit configured to shift the printing apparatus to a state in which the user can supply the recording material according to the command received by the receiving unit. In a case where the printing apparatus is shifted by one of the first shifting unit and the second shifting unit, the printing apparatus is no longer shifted by the other one of the first shifting unit and the second shifting unit.

Abstract: A developer replenishing device includes a container mount to hold a developer container to contain developer used in image formation, an installation completion detector to detect completion of installation of the developer container in the container mount, a replaceable containing portion to contain developer, a conveyance channel to which the containing portion is removably connected and through which developer is transported from the developer container held in the container mount to the containing portion, and a conveyance pump to transport developer from the developer container through the conveyance channel to the containing portion. In a state in which the developer container is not held in the container mount according to a detection result by the installation completion detector, the conveyance pump transports developer from the conveyance channel to the containing portion.

Abstract: A toner supply system having: a receiving section that is set in a body of an image forming apparatus so as not to rotate; and a substantially cylindrical toner container that is mountable in and dismountable from the receiving section and that can be driven to rotate on an axis while being mounted in the receiving section, wherein: the toner container has a first toner feeder for feeding toner stored therein toward the receiving section while the toner container is rotated; and the receiving section has a supply port that permits toner fed thereto with rotation of the toner container to drop down and a toner stirrer that extends to a position close to the first toner feeder located inside the toner container while the toner container is mounted in the receiving section.

Abstract: A toner conveyor includes a noncircular conveyance member rotatable in a predetermined direction of rotation to convey toner to a toner container and a plate-shaped metal scraper slidably contacting the conveyance member with predetermined pressure therebetween to scrape the toner off the conveyance member. The scraper includes a contact end contacting the conveyance member, at least one through-hole spaced apart from the contact end, and a toner carrying face contacting the toner accumulated in the toner container. A lid is attached to the toner carrying face of the scraper to cover the at least one through-hole of the scraper and includes a separation region extending from an upper edge thereof to at least a position disposed opposite a lower edge of the at least one through-hole in a short direction of the scraper. The separation region is separatable from the scraper.

Abstract: A nozzle insertion member arranged in a powder container includes a nozzle insertion opening; an opening/closing member opening/closing the nozzle insertion opening; a supporting member supporting the opening/closing member; and a biasing member provided to the supporting member to bias the opening/closing member toward a closing position. When the powder is supplied to the conveying nozzle along with rotation of a rotary conveyor arranged inside the powder container, the supporting member rotates with the rotation of the conveyor. The opening/closing member is rotated by a drive transmitting mechanism with rotation of the supporting member. The mechanism includes an elongated member arranged on the opening/closing member and penetrating through an opening formed on the supporting member; and a drive transmitted portion formed on the elongated member; and a drive transmitting portion formed on an inner surface of the opening and configured to come into contact with the drive transmitted portion.

Abstract: A toner replenishing container includes a storage chamber, a hole and an identification member. The storage chamber stores a toner for replenishment. The hole is engaged with the toner replenishing container identifying portion of the mounting portion when the toner replenishing container is mounted on the mounting portion, is formed at a predetermined position on a front surface of the toner replenishing container in a mounting direction, and has a polygonal cross-section. The identification member is detachably inserted into the hole in a form corresponding to the polygonal shape of the hole when an orientation of the identification member is rotated about a center line of the hole.

Abstract: A developer transporting device includes a transporting device body including a transporting portion having an inlet, a developer container including a container portion having an outlet connected to the inlet and a cover member that is movable between positions for opening and closing the outlet, a first contact portion supported by the cover member, a guide portion including a passage portion and an inclined portion that is connected to the passage portion and that comes into contact with the first contact portion to move the cover member, and a second contact portion that is provided on the passage portion and extends toward the position for closing the outlet. The second contact portion comes into contact with the first contact portion and moves the cover member toward the position for closing the outlet when the first contact portion passes the second contact portion.

Abstract: A development device can include a developer containing part containing developer, a carrier to carry developer that is supplied from the developer containing part to a development range, a partition dividing the developer containing part into a supply part and a circulation part beneath the supply part to collect developer from the carrier, a first transport member in the supply part of the developer containing part to supply developer from the supply part to the carrier, and a second transport member in the circulation part to transport developer in the circulation part in an axial direction of the carrier. The device can also include a removable seal member, which seals a supplied-developer and/or a collected-developer communicating area.

Abstract: A developer container includes a container body in which a developer containing chamber and a discharge outlet are formed, a developer conveyance member disposed inside the developer containing chamber and including a first conveyance portion and a second conveyance portion downstream from the first conveyance portion in a developer conveyance director, a canopy disposed inside the container body and facing the discharge outlet, a developer conveyance chamber defined by the canopy and an inner face of the container body in which the discharge outlet is formed, and a return opening formed in the canopy downstream from the discharge outlet. A developer conveyance velocity (Q2) of the second conveyance portion of the developer conveyance member to transports the developer toward the return opening is slower than a developer conveyance velocity (Q1) of the first conveyance portion of the developer conveyance member.

Abstract: A developer container includes a containing portion that is capable of containing a developer therein, the containing portion having an opening through which the developer passes; a first opening/closing member that is movable between a first open position at which the opening is open and a first closed position at which the first opening/closing member closes the opening; and a second opening/closing member that is movable between a second closed position at which the second opening/closing member doubly closes the opening by covering an outside of the first opening/closing member and a second open position at which the first opening/closing member is exposed to the outside, wherein a direction in which the second opening/closing member moves between the second open position and the second closed position is different from a direction in which the first opening/closing member moves between the first open position and the first closed position.

Abstract: The present application discloses a developing mechanism including a developing device for developing electrostatic latent images and a container containing developer. The developing device includes a carrier carrying and supplying the developer to the electrostatic latent images; a first housing having a feed port through which the developer is fed; a first conveyance member conveying the developer along a first direction away from the feed port; and a first shutter mechanism selectively opening and closing the feed port. The container includes a second housing having a supply port from which the developer is supplied through the feed port to the developing device; a second shutter mechanism selectively opening and closing the supply port; and a second conveyance member conveying the developer along a second direction across the first direction for developer discharge through the supply port. The feed port is opened earlier than the supply port is opened.

Abstract: A toner refill device includes first and second adapter units defining first and second refill openings, and first and second closure members movable between closed positions open and closed positions to respectively close and open the refill openings. The second closure member has a passage forming element connecting the refill openings when the second closure member is in the open position. The second adapter unit defines an accommodation space for accommodating the passage forming element when the second closure member is in the closed position. The closure members are adapted to be coupled to one another for a joint movement relative to the adapter units. The closure members are rotatably supported in their respective adapter units so as to be jointly rotatable about a common axis of rotation. The second refill opening and the accommodation space are angularly offset from one another about said common axis of rotation.

Abstract: A developer unit for an image forming apparatus is provided. The developer unit includes a developer device with a developer agent carrier and a developer agent supplier, and a developer agent container, which contains the developer agent and is arranged in a lower position with respect to the developer device. The developer agent container is formed to have a fitting wall, which is curved inward at a position to be adjacent to the developer device. The fitting wall is formed to have a feeding opening and a collecting opening. The developer unit is further provided with a first conveyer, which is rotated about a rotation axis to sweep an inner surface of the developer agent container and convey the developer agent toward the feeding opening, and a second conveyer, which is arranged along the developer agent supplier and conveys the developer agent toward the collecting opening.

Abstract: A toner conveying device includes a toner containing part, a conveying member, and a vibration mechanism. The toner containing part contains a toner. The conveying member rotates around a rotation axis so as to convey the toner in the toner containing part. The vibration mechanism vibrates the conveying member in directions of the rotation axis.

Abstract: A toner supply device according to one aspect of the present disclosure includes: a toner case configured to contain toner; and a mounting member on which the toner case is detachably mounted. The mounting member includes: a toner receiving portion configured to receive the toner discharged from the toner case; and a toner holding portion configured to hold the toner received by the toner receiving portion. The toner holding portion includes a movable portion disposed below the toner receiving portion. The movable portion is provided so as to be able to lift and lower relative to the toner receiving portion.

Abstract: A cartridge detachably mountable to a main assembly of an image forming apparatus includes: a frame; a flexible developer bag, provided with an opening and provided inside the frame, for containing a developer; and an elastic member for discharging the developer through the opening by acting on the developer bag. The elastic member is extended from a free state by contact with the developer bag, and elastic energy accumulated by extension of the elastic member acts on the developer bag to discharge the developer through the opening.

Abstract: A developer storage body includes a storage portion in which a developer is stored, a supplying opening through which the developer is ejected, and a conveying member provided in the storage portion. The conveying member is rotatable about a rotation axis so as to convey the developer to the supplying opening. The supplying opening is provided with a plurality of slits extending in a direction substantially perpendicular to the rotation axis of the conveying member.

Abstract: An image forming device includes a plurality of image bearing members, a plurality of developing units, a plurality of toner cartridges, a plurality of shutter driving members, a driving force generating member that generates a driving force, and a driving force transmitting mechanism that transmits the driving force to the shutter driving members. Each toner cartridge includes a casing formed with an opening through which toner accommodated in the casing is supplied to the corresponding developing unit and a shutter movable between an opening position at which the shutter opens the opening and a closing position at which the shutter closes the opening. Each of the shutter driving members moves the corresponding shutter between the opening position and the closing position when supplied with the driving force.