Abstract: A powder conveying device includes: a conveying nozzle, provided with a powder receiving opening; an open/close member to open/close the powder receiving opening; a flange provided to the open/close member; a biasing member to bias the open/close member; and a container setting section to which a part of a powder container is to be fit. The powder container includes: a conveyor to convey the powder from a second end of the powder container to a first end; a container opening protruding from the first end; a nozzle receiving opening into which the conveying nozzle is to be inserted; and a butting portion provided in the container opening, to butt against the flange. When the powder container is attached to the powder conveying device, the container opening is fitted to the container setting section, and the flange and the biasing member are housed in an inner space of the container opening.

Abstract: A first contact portion provided on a first shutter member that opens and closes a receiving port for receiving a developer from a cartridge and a second contact portion provided on the cartridge are configured to contact each other in an attachment and detachment direction of the cartridge so that the first shutter member is in a position at which the receiving port is opened. The first shutter member is urged by a first urging member so that a contacting state between the first contact portion and the second contact portion is maintained until a second shutter member that opens and closes a supplying port of the cartridge closes the supplying port when the cartridge is discharged from the apparatus body.

Abstract: In an example, a container includes a housing with a memory resource embedded therein, an electrical contact coupled to an exterior of the container, and an electrical lead coupled to the memory resource and the electrical contact. In another example, a toner cartridge includes a controller embedded within a material of a housing and an electrical contact on an exterior surface of the housing and electrically coupled to the controller. In an example method of manufacturing a container, a memory resource is placed in a mold, material is injected into the mold such that the memory resource is embedded in the material, and the material is allowed to solidify.

Abstract: Example implementations relate to an apparatus to transfer a quantity of print material to a printing device through a transfer mechanism. In some examples, the apparatus includes a container including the quantity of print material, a transfer mechanism associated with the container, and a sensor associated with the transfer mechanism. In some examples, the sensor is to communicate to the printing device information about the transfer of the quantity of print material through the dispenser mechanism.

Abstract: A developer supply container supplies a developer through a developer receiving opening displacably provided in a developer receiving apparatus to which the developer supply container is detachably mountable. The developer supply container includes a developer accommodating portion to accommodate a developer, and a discharge opening to permit discharge of the developer in the developer accommodating portion toward the developer receiving opening. An engaging portion, engageable with the developer receiving apparatus, displaces the developer receiving opening toward a position of the discharge opening at the time when the developer supply container is mounted to the developer receiving apparatus, with a mounting operation of the developer supply container.

Abstract: A development cartridge is provided. The development cartridge includes a toner container, having a first air vent and a second air vent, to accommodate a toner, a developing portion to receive the toner from the toner container and having a developing roller installed therein, a toner refilling portion, connected to an end of the toner container in a longitudinal direction, to provide the toner container with a passage for refilling the toner, a filter installed in the first air vent to reduce leakage of the toner, and a pressure releasing member to communicate with the toner container via the second air vent and being transformable in a contracted state and an expanded state to expand a volume of the toner container, wherein the first air vent is formed at a position farther from the toner refilling portion than the second air vent.

Abstract: If a user is not familiar with the operation for the developer supply container, the rotating operation for the developer supply container may be insufficient, so that developer supply container does not reach a predetermined operating position, with the result of abnormal developer supply. by increasing a rotation load of a second gear 6 which is in an operable connection with a drive gear member 12 of the developer receiving apparatus 10 by a function of a locking member 7, the developer supply container 1 mounted to the developer receiving apparatus 10 is rotated toward the supply position. After the developer supply container 1 rotates to the supply position, the locking by the locking member 7 is released, by which the rotation load applied to the second gear 6 is reduced, so that drive transmission, thereafter, to the feeding member 4 for developer supply is smooth.

Abstract: There are provided a rotatable developer accommodating portion accommodating a developer, a discharge end portion provided at a bottom side with a discharge opening for discharging the developer accommodated in the developer accommodating portion, an engaging portion 30 engageable with a portion-to-be-engaged 11b with a mounting operation of the developer supply container 1 to displace the portion-to-be-engaged 11b in an upward direction U to bring the receiving opening into fluid communication with the discharge opening, and a swing shaft 41 rotatably supporting engaging portion 30 provided at such a position that opposite end portions of the engaging portion 30 a rotatable.

Abstract: There are provided a rotatable developer accommodating portion accommodating a developer, a discharge end portion provided at a bottom side with a discharge opening for discharging the developer accommodated in the developer accommodating portion, an engaging portion 30 engageable with a portion-to-be-engaged 11b with a mounting operation of the developer supply container 1 to displace the portion-to-be-engaged 11b in an upward direction U to bring the receiving opening into fluid communication with the discharge opening, and a swing shaft 41 rotatably supporting engaging portion 30 provided at such a position that opposite end portions of the engaging portion 30 a rotatable.

Abstract: A cartridge attachable to an apparatus main body of an image forming apparatus, the apparatus main body having a restricting portion and to which the cartridge is mounted by being moved from a unmounted position to a mounting-completed position in a first direction, the cartridge includes a developer container provided with a supply port, and a shutter movable between an opening position for opening the supply port and a closing position for closing the supply port, having a restricted portion, and configured to be in the closing position when the cartridge is in the unmounted position and be in the opening position when the cartridge is in the mounting-completed position, wherein a movement of the shutter in a second direction perpendicular to the first direction is restricted by an engagement between the restricting portion and the restricted portion when the cartridge is in the mounting-completed position.

Abstract: A toner refill cartridge includes a body in which toner is accommodated, a plunger inserted into the body and movably coupled to the body in a longitudinal direction of the body to push the toner out of the body, a toner injection completion signal generator used to detect toner injection completion according to movement of the plunger, and a connection interface located at a tip portion of the body and connectable to an image forming apparatus to transfer information about a toner refill cartridge to the image forming apparatus.

Abstract: A developer supply container includes a developer accommodating portion 2a for accommodating toner, a developer supply opening 5b for discharging the toner accommodated in the developer accommodating portion 2a from the developer supply container 1, a feeding portion 2b for feeding the toner in the developer accommodating portion 2a toward the developer supply opening 5b, a rotatable drive receiving portion 7a for receiving a rotational force for rotating the feeding portion 2b, and a holding projection 4h held by a holding mechanism 304 provided in the developer supply container 1 to determine a position of the developer supply container 1, wherein the developer supply opening 5b is disposed between the drive receiving portion 7a and the holding projection 4h. By this, a stability of connection between the discharge opening of the developer supply container and the receiving port of the image forming apparatus side is improved.

Abstract: A rotational force is transmitted to a main assembly side feeding member for feeding the toner into a main assembly side toner accommodating portion from a coupling member provided on a cartridge. The cartridge includes a photosensitive drum, a discharge opening configured to discharge the toner removed from the photosensitive drum toward the main assembly side feeding member, and a coupling member configured to transmit the rotational force to the main assembly side feeding member. The coupling member is movable between a first position for transmitting the rotational force to the main assembly side feeding member and a second position retracted from the first position.

Abstract: A cartridge comprises a frame including a chamber, a photosensitive drum supported by the frame, a first coupling member operatively connected to the photosensitive drum such that a rotational force can be transmitted from the first coupling member to the photosensitive drum, and a second coupling member provided adjacent to an opening in the cartridge. The chamber is in fluid communication with the opening, with the second coupling member forming at least a part of the passageway through which toner can move from the chamber to the opening.

Abstract: Examples described herein relate to a system consistent with the disclosure. For instance, the system may comprise a valve body having a first opening, a print substance valve disposed inside of the valve body including a second opening, and a liner coupled to the print substance valve including a third opening, where the liner is to clean print substance, when present, from the system responsive to the transition of the system into either of a closed position or an open position.

Abstract: An image forming apparatus includes a toner container and an apparatus main body. The toner container contains a toner. To the apparatus main body, the toner container is attached in a detachable manner. The toner container includes a container main body and a shutter. The container main body has a toner discharge port. The shutter is rotatable between a close position where the shutter closes the toner discharge port and an open position where the shutter opens the toner discharge port. The apparatus main body includes a driving source and a connection mechanism connectable the driving source to the shutter. When the driving source is driven in a state where the connection mechanism connects the driving source to the shutter, a driving force of the driving source is transmitted to the shutter via the connection mechanism, and the shutter is rotated from the close position to the open position.

Abstract: A rotational force is transmitted to a main assembly side feeding member for feeding the toner into a main assembly side toner accommodating portion from a coupling member provided on a cartridge. The cartridge includes a photosensitive drum, a discharge opening configured to discharge the toner removed from the photosensitive drum toward the main assembly side feeding member, and a coupling member configured to transmit the rotational force to the main assembly side feeding member. The coupling member is movable between a first position for transmitting the rotational force to the main assembly side feeding member and a second position retracted from the first position.

Abstract: A cartridge comprises a frame including a chamber, a photosensitive drum supported by the frame, a first coupling member operatively connected to the photosensitive drum such that a rotational force can be transmitted from the first coupling member to the photosensitive drum, and a second coupling member provided adjacent to an opening in the cartridge. The chamber is in fluid communication with the opening, with the second coupling member forming at least a part of the passageway through which toner can move from the chamber to the opening.

Abstract: A system with a container including a protrusion, and a receiver to receive the container. The receiver includes a slide block that is movable relative to a body of the receiver, the slide block including two surfaces, a first surface, initially contacted by the protrusion of the container during insertion of the container into the receiver, having a first slope to resist movement of the container towards the receiver, and a second surface, subsequently contacted by the protrusion of the container during the insertion of the container into the receiver, having a second slope to interact with the protrusion of the container to assist movement of the container towards the receiver. This construction provides the user with a changing insertion force to indicate proper mounting of the container.

Abstract: A rotational force is transmitted to a main assembly side feeding member for feeding the toner into a main assembly side toner accommodating portion from a coupling member provided on a cartridge. The cartridge includes a photosensitive drum, a discharge opening configured to discharge the toner removed from the photosensitive drum toward the main assembly side feeding member, and a coupling member configured to transmit the rotational force to the main assembly side feeding member. The coupling member is movable between a first position for transmitting the rotational force to the main assembly side feeding member and a second position retracted from the first position.

Abstract: A rotational force is transmitted to a main assembly side feeding member for feeding the toner into a main assembly side toner accommodating portion from a coupling member provided on a cartridge. The cartridge includes a photosensitive drum, a discharge opening configured to discharge the toner removed from the photosensitive drum toward the main assembly side feeding member, and a coupling member configured to transmit the rotational force to the main assembly side feeding member. The coupling member is movable between a first position for transmitting the rotational force to the main assembly side feeding member and a second position retracted from the first position.

Abstract: There is provided an erroneous mounting prevention system in which, by moving a second cartridge in a mounting direction to mount the second cartridge on a first apparatus main body, a protruding portion is brought into abutment with a surface portion, and, by moving a first cartridge in the mounting direction to mount the first cartridge on the first apparatus main body, the first cartridge is mounted on the first apparatus main body without being restricted from being moved by the surface portion.

Abstract: An attachment and detachment structure attaches and detaches a toner container to and from an attachment unit. The toner container includes a container main body, a rotational member and a power transmission body. The rotational member rotates around an axis to agitate the toner contained in the container main body. The power transmission body is provided outside the container main body and rotates around an axis to transmit a rotational force to the rotational member. The attachment unit includes a contact body which comes into contact with the power transmission body on attachment process and detachment process of the toner container to and from the attachment unit and rotates the power transmission body. The power transmission body comes into contact with the contact body on the attachment process of the toner container to the attachment unit, and is rotated around the axis to rotate the rotational member around the axis.

Abstract: Conventionally, the developer in the developer supply container is discharged by an air-supply pump and a suction pump which are provided in the main assembly side of the image forming apparatus, and therefore, the developer is compacted by the increase of the internal pressure of the developer supply container resulting from the air-supply. Therefore, the proper suction of the developer from the developer supply container becomes difficult with the result of shortage of the developer amount to be supplied. A bellow-like pump is provided on the side of the developer supply container, and the pump alternately repeats the suction operation and the discharging operation through the discharge opening by a driving force inputted from the image forming apparatus side. By this, the developer can be sufficiently loosened, thus properly discharging the developer.

Abstract: An image forming apparatus includes an image holding member, a charging unit, an electrostatic image forming unit, a developing unit that includes an electrostatic image developer and develops the electrostatic image with the electrostatic image developer, a transfer unit, a fixing unit, a replenishment toner container that includes a replenishment toner that is to be supplied into the developing unit and discharges the replenishment toner by rotation of the replenishment toner container, a replenishment toner container mounting unit that holds the replenishment toner container and rotates the replenishment toner container, and a toner supply pass that connects the replenishment toner container mounting unit to the developing unit. The replenishment toner includes toner particles and silica particles having a number average particle size of 110 nm to 130 nm, a large-diameter-side number particle size distribution index (upper GSDp) of less than 1.080, and an average circularity of 0.94 to 0.

Abstract: A developer supply device includes a body, a developer supply unit drawably insertable into the body, and a developer container removably installable in the developer supply unit. The developer container contains a developer and includes a developer discharge port. The developer supply unit includes a lever that closes the developer discharge port when the lever has moved to a first position and opens the developer discharge port when the lever has moved to a second position, and a lock that engages an engagement portion of the lever in conjunction with an operation of drawing the developer supply unit from the body to restrict the lever from moving from the first position to the second position and disengage from the engagement portion in conjunction with an operation of inserting the developer supply unit into the body to allow the lever to move from the first position to the second position.

Abstract: A developer conveyance device includes a downward conveyance path in which a developer falls under gravity, a transverse conveyance path communicating with a lower end of the downward conveyance path and extending in a transverse direction intersecting with the downward conveyance path, a transport screw disposed in the transverse conveyance path, and a floating member. The transport screw is configured to rotate in a predetermined direction to transport the developer in the transverse direction. The floating member is configured to contact the transport screw rotating in the predetermined direction to float in the downward conveyance path.

Abstract: A cartridge comprises a frame including a chamber, a photosensitive drum supported by the frame, a first coupling member operatively connected to the photosensitive drum such that a rotational force can be transmitted from the first coupling member to the photosensitive drum, and a second coupling member provided adjacent to an opening in the cartridge. The chamber is in fluid communication with the opening, with the second coupling member forming at least a part of the passageway through which toner can move from the chamber to the opening.

Abstract: The present disclosure features an image forming apparatus having a first developing unit having a first developing roller; and a first toner supply unit configured to supply toner to the first developing unit, the first toner supply unit having: a first container configured to accommodate the toner therein, the first container having a first inlet opening through which the toner is received in the first container and a first outlet opening through which the toner in the first container is discharged; a first lid configured to close the first inlet opening; and a first shutter configured to open the first outlet opening when the first lid closes the first inlet opening, and to close the first outlet opening when the first lid opens the first inlet opening.

Abstract: A developing device includes: a housing having a first transport path through which developer is supplied, a second transport path adjoining the first transport path with a first partition wall therebetween, and a first communication path communicating with the second transport path on a downstream side in a developer transport direction in the first transport path; a first transport member disposed in the first transport path and having an axially rotatable first rotary shaft and a first spiral blade projecting from an outer circumferential surface of the first rotary shaft; a second transport member disposed in the second transport path and having an axially rotatable second rotary shaft and a second spiral blade projecting from an outer circumferential surface of the second rotary shaft; and a first blade member projecting from the outer circumferential surface of the first rotary shaft, at a position facing the first communication path, the blade member discharging the developer onto the second transport

Abstract: A replaceable unit for an electrophotographic image forming device according to one example embodiment includes a housing having a reservoir for storing toner. A rotatable shaft is positioned within the reservoir and has an axis of rotation. A first magnet and a second magnet are connected to the shaft and rotatable around the axis of rotation in response to rotation of the shaft. The first magnet and the second magnet are detectable by a magnetic sensor when the replaceable unit is installed in the image forming device. A polarity of the first magnet is oriented opposite a polarity of the second magnet relative to the shaft. An amount of angular offset between the first magnet and the second magnet varies depending on an amount of toner in the reservoir.

Abstract: A toner cartridge includes a first casing, a second casing, an auger screw, and a shutter. The first casing has a first internal space. The second casing has: a second internal space smaller than the first internal space; a first opening allowing toner in the second internal space to be discharged; and a second opening allowing air in the second internal space to be sent to an outside. The auger screw is rotatable about a first rotation axis and configured to convey toner in the first internal space to the second internal space. The shutter is rotatable relative to the second casing about a second rotation axis between a first position in which the shutter closes the first opening and a second position in which the shutter opens the first opening. In a state where the shutter is at the second position, the shutter does not close the second opening.

Abstract: A toner cartridge according to one example embodiment includes a housing having a toner reservoir. An outlet port faces downward on a front of the housing near a first side of the housing. A linkage is positioned on the first side of the housing and has an engagement surface that is accessible at the rear of the housing. A projection is positioned on the first side of the housing and is movable between a first position and a second position. The projection is operatively connected to the linkage such that the projection moves upward from the first position to the second position when the engagement surface receives a forward force that is toward the front of the housing. The projection extends outward sideways from the first side when the projection is in the second position.

Abstract: A replaceable unit for an electrophotographic image forming device according to one example embodiment includes an electrical contact positioned on a first side of a housing of the replaceable unit for contacting an electrical contact in the image forming device. A guide on the first side of the housing is positioned closer to a front of the housing than the electrical contact and leads rearward toward the electrical contact. The guide includes an inside surface that faces inward sideways toward a second side of the housing. At least a portion of the inside surface is angled inward sideways from front to rear permitting contact between the inside surface and an electrical connector in the image forming device to draw the electrical connector in the image forming device inward sideways relative to the replaceable unit during insertion of the replaceable unit into the image forming device.

Abstract: A toner cartridge extrusion device that extrudes a toner cartridge with a driving force of a driver is provided. The toner cartridge extrusion device includes a single detector that performs drive detection to detect drive of the driver and extrusion detection to detect whether or not the toner cartridge has been extruded.

Abstract: A toner container includes a housing having a toner reservoir. An input gear is positioned on the housing for mating with a corresponding output gear in an image forming device when the toner container is installed in the image forming device. A toner agitator is movably positioned in the reservoir. The toner agitator is operatively connected to the input gear such that rotation of the input gear in a first rotational direction causes movement of the toner agitator for agitating toner in the reservoir. An encoded member is encoded with authentication information of the toner container and is operatively connected to the input gear such that rotation of the input gear in a second rotational direction causes movement of the encoded member for communicating the authentication information of the toner container to a controller of the image forming device when the toner container is installed in the image forming device.

Abstract: A cartridge includes a shutter that opens and closes when the cartridge is attached and detached to a developing unit or image forming apparatus. The cartridge includes a casing having a chamber with a first opening at one end portion allowing toner to flow out of the casing. The cartridge includes a cover that covers the first opening, movable with the casing and having a second opening allowing toner to flow out of the cover. The shutter is located at the one end portion and has a protrusion further from the one end portion than the cover. The developing unit supports the protrusion when the cartridge is mounted thereon, and the casing pivots with the cover relative to the developing unit between a first position where the shutter closes the second opening and a second position where a third opening of the shutter overlaps the second opening.

Abstract: An image forming device that forms an image through exposure of any one of a plurality of photosensitive members to light, image developing, and image transfer. The image forming device includes a holder, a conveyance unit, a first developer unit, and a second developer unit. The holder holds one or more containers of developer and causes the developer to flow out from a container selected from the held containers. The conveyance unit conveys the developer from the container to a destination and can switch the destination between at least the first developer unit and the second developer unit. The first developer unit uses the developer to develop an electrostatic latent image formed on a first photosensitive member. The second developer unit uses the developer to develop an electrostatic latent image formed on a second photosensitive member. The image is the same color regardless of which developer unit is used.

Abstract: A powder container contains powder and is attached to an image forming apparatus including: a conveying nozzle to convey the powder; a powder receiving hole of the conveying nozzle to receive the powder from the powder container; an apparatus main-body gear to transmit a driving force to the powder container; and a container receiving section including the conveying nozzle and receiving the powder container. The powder container includes: an opening at one end of the powder container in a longitudinal direction; a nozzle receiver at the opening to receive the conveying nozzle; a conveyor to convey the powder; and a container gear to drive the conveyor by meshing with the apparatus main-body gear. The container gear is to mesh with the apparatus main-body gear at a position closer to the opening than the powder receiving hole in the longitudinal direction. The opening is to mate with the container receiving section.

Abstract: A cartridge includes a shutter that opens and closes when the cartridge is attached and detached to a developing unit or image forming apparatus. The cartridge includes a casing having a chamber with a first opening at one end portion allowing toner to flow out of the casing. The cartridge includes a cover that covers the first opening, movable with the casing and having a second opening allowing toner to flow out of the cover. The shutter is located at the one end portion and has a protrusion further from the one end portion than the cover. The developing unit supports the protrusion when the cartridge is mounted thereon, and the casing pivots with the cover relative to the developing unit between a first position where the shutter closes the second opening and a second position where a third opening of the shutter overlaps the second opening.

Abstract: There are provided a rotatable developer accommodating portion accommodating a developer, a discharge end portion provided at a bottom side with a discharge opening for discharging the developer accommodated in the developer accommodating portion, an engaging portion 30 engageable with a portion-to-be-engaged 11b with a mounting operation of the developer supply container 1 to displace the portion-to-be-engaged 11b in an upward direction U to bring the receiving opening into fluid communication with the discharge opening, and a swing shaft 41 rotatably supporting engaging portion 30 provided at such a position that opposite end portions of the engaging portion 30 a rotatable.

Abstract: A developer accommodating unit includes a frame that has an opening for discharging a developer, and a sealing unit that has a sealing portion for sealing the opening, in which a state of the sealing unit is capable of changing from a first state in which the sealing portion seals the opening to a second state in which the opening is opened. A tip of a first part is positioned on a downstream side of the base of the first part in a first direction if the sealing unit is in the first state, and the first part is deformed such that the tip of the first part is positioned on an upstream side of the base of the first part in the first direction if the state of the sealing unit changes from the first state to the second state.

Abstract: A rotating device includes a body having a bottom wall extending in one direction; a holding object including a rotating portion extending in the one direction and a supporting portion supporting the rotating portion at one end of the rotating portion in the one direction such that the rotating portion is rotatable on an axis extending in the one direction, the holding object being provided on the bottom wall; a first holding portion provided on the body and holding the supporting portion of the holding object at one end of the supporting portion in the one direction; a second holding portion provided on the body and holding the supporting portion of the holding object at an other end of the supporting portion in the one direction; and a transmitting portion provided on the body and transmitting a rotational force to the rotating portion of the holding object.

Abstract: An image forming apparatus including a rotatable developer container, a receiving device which receives the container and is inserted in a direction along a rotational axis of the container and which receives the developer discharged from the container when the container is in a first position, and a regulating member provided on the container. The regulating member prevents, during transportation of the image forming apparatus, the container from moving to the first position from a second position which is upstream of the first position with respect to an inserting direction of the container and in which the developer is not discharged from the container.

Abstract: A toner supply device includes: a device body; and a toner bottle, wherein a toner supply port is formed in each of the device body and the toner bottle, either one of the device body and the toner bottle includes: a shutter that can be selectively moved between a shielding position and an open position; and a first engagement part, the other one of the device body and the toner bottle includes a second engagement part, the shutter is moved from the shielding position to the open position and the shutter opens the toner supply port, and then the first engagement part is engaged with the second engagement part, and the shutter is moved from the open position to the shielding position and the shutter closes the toner supply port, and then engagement between the first engagement part and the second engagement part is disengaged.

Abstract: A cartridge detachably mountable to a main assembly of an image forming apparatus includes a drum unit including a photosensitive drum; a developing unit including a developing roller, a driving force receiving portion, and a development gear; a driving train for transmitting the driving force to the development gear. The developing roller is movable between a contact position and spacing position relative to the drum. The driving train includes a first driving portion connected with the driving force receiving portion and a second driving portion for transmitting the driving force toward the gear. When the developing unit is in the contact position, the first and second driving portions are connected with each other to transmit the driving force from the first driving portion to the second driving portion, and when the developing unit is in the spacing position, the first and the driving portion are not connected.

Abstract: A developer supply container 1 is detachably mountable to a developer receiving apparatus including a developer receiving portion 11 provided with a receiving port 11a for receiving a developer, a portion-to-be-engaged 11b a displaceable integrally with the developer receiving portion 11. The developer supply container 1 includes an engaging portion 30 and a discharging portion provided with a shutter opening 4j for discharging the developer accommodated in a developer accommodating portion. The engaging portion 30 is provided at only one side with respect to a predetermined direction crossing with a mounting direction of the developer supply container 1 in the crossing with a displacing direction of the developer receiving portion 11. The engaging portion 30 engages with the portion-to-be-engaged 11b with a mounting operation of the developer supply container 1 to bring the receiving port 11a in the communication with the shutter opening 4j.

Abstract: A cartridge support unit includes a housing, a toner cartridge, a guide member, a shutter body, and at least one snap fit portion. The housing has an opening. The toner cartridge has a cylindrical shape, has an outer circumferential surface, and is removably mounted in the housing. The guide member has portions and is provided at such a position in the housing that the opening is interposed between the portions of the guide member. The shutter body slides against the guide member from a closed position where the shutter body covers the opening to an open position where the shutter body exposes the opening. The at least one snap fit portion extends from the shutter body and has a protrusion. The protrusion is pushed by the outer circumferential surface of the toner cartridge so as release a lock state at the closed position.

Abstract: A developing device includes a container containing developer, into which toner is supplied from a supply port provided in the upper part of the container; and a rotary member disposed so as to oppose the supply port and having a projection on the circumference thereof, the rotary member transporting the developer and accumulating the developer in the supply port when the level of the surface of the developer inside the container is higher than or equal to a threshold height, and the rotary member transporting the toner from the supply port to the container through a path formed between the rotary member and the container by pushing the toner with the projection when the level of the surface is lower than the threshold height.

Abstract: A developer supply container 1 detachably mountable to a developer supplying apparatus 201 includes a developer accommodating portion 2 capable of accommodating a developer, a discharge opening 4a for discharging the developer accommodated in the developer accommodating portion 2 toward the developer supplying apparatus 201, a pump portion 3a for effecting a discharging operation through the discharge opening 4a, a communicating portion 4d provided at a position contacting the discharge opening 4a and capable of storing a constant amount of the developer, and a regulating portion 7 capable of taking a developer flow regulating state in which the flow of the developer into the communicating portion 4d and a developer flow non-regulating state in which the entering of the developer is not regulated, the regulating portion 7 taking the developer flow regulating state in a discharging operation of the pump portion 3a, wherein the regulating portion 7 is provided with an air flow path 7g for communicating between