Abstract: A developing device frame unit supporting a regulating member regulating the layer thickness of developer on a developer carrier. The unit includes a frame having a seal forming portion, first and second, first and second end seals contactable to the carrier surface to prevent carrier-axial-direction leaking of the developer, and a blade sealer sealing between the regulating member and the frame to prevent developer leaking when the regulating member is mounted. The blade sealer is an elastomer resin material which is injection-molded with a metal mold and in the seal forming portion where the end seals are provided. The blade sealer connects the end seals with each other, and a protrusion provided by a squeezed-out portion of the resin material is provided by injecting, into a space defined by the metal mold, the seal forming portion, and the end seal seals, a resin material volume larger than a volume of the space.

Abstract: This invention provides a seal for the tank/developer section of a two-piece toner cartridge that is applied externally to the section at the opening of the developer roller, where it is intended to confront the drum in the fully assembled cartridge. The seal assembly includes a resilient seal member, illustratively constructed from a stiffening bar that caps a resilient/pliable foam or another elastomer. The foam impinges on the doctor blade where it meets the developer roller, to bias the doctor blade against the developer roller and seal this region against the exit of toner. The foam and stiffening bar have an elongated length that matches the developer opening so that this region is fully sealed along its length. The stiffener is flexibly attached to a sheet material. The sheet is secured to the cartridge surface at a respective edge on each side by releasable adhesive.

Abstract: A developing device includes a housing containing toner having an opening at a side thereof, a developing roller supplying the toner supplied through the opening to a photoconductive drum, and a regulator contacting the outer circumference of the developing roller to regulate the amount of the toner supplied to the photoconductive drum. The housing also includes a lower frame having both side portions and a lower end portion respectively forming both edges and a lower edge of the opening in a lengthwise direction, and an upper frame welded and coupled to the lower frame and including a leading end portion forming an upper edge of the opening and a recess portion recessed from the leading end portion at both end portions of the leading end portion in the lengthwise direction. Both side portions of the lower frame includes a first surface contacting the recess portion to prevent the upper frame from being pushed toward the developing roller when the upper frame is welded and coupled to the lower frame.

Abstract: A unit includes an injection path provided on a frame member and through which a molten resin flows when a seal portion is formed through injection molding, an injection port provided at one end side of the injection path in an injection direction in which the molten resin flows through the injection path and through which the molten resin is injected into the frame member, and a discharge port which is provided at another end side of the injection path in the injection direction and through which the molten resin having passed through the injection path is discharged to a seal forming portion.

Abstract: A developing device for an image forming apparatus may include a seal and a casing to prevent leakage of developer. In some examples, the seal member may include multiple side surfaces while the casing may include projections that may abut and contact various surfaces of the seal member. According to one arrangement, the casing may include first, second and third protrusions, where each protrusion is configured to abut and contact a corresponding surface of the seal member. Additionally, the second projection may protrude in a position inside of the first projection while the third projection may protrude in a position between the first and second projections.

Abstract: A seal member is described that is configured to prevent leakage of micro-powder from a rotating body such as a developing roller. The seal member of the rotating body of an image forming device using toner of the micro-powder includes base fabric consisting of knitting or fabric, loop-shaped pile yarn or cut-shaped pile yarn, which is supported on a surface of the base fabric by the entanglement or support of ground yarn of the base fabric, and a coating layer which has penetrated from a back surface of the base fabric to which a coating agent is applied to the side of pile yarn. A height of the coating agent which has penetrated from the back surface of the base fabric is the same as or less than a thickness of the base fabric which is configured by the height of the ground yarn which supports the pile yarn.

Abstract: A cartridge detachably mountable to a main assembly of an image forming apparatus includes: a frame; an accommodating portion, constituted by the frame, for accommodating a developer; a seal portion for preventing the developer from being leaking out from the accommodating portion, wherein the seal portion is formed by injection molding at a seal forming portion provided on the frame and is projected from the seal forming portion; and a sprue which is formed integrally with the seal portion by a resin material remaining in a path for permitting flow of the resin material melted when the seal portion is formed by the injection molding and which is projected from the frame in a position different from a position of the seal portion so as to be higher than the seal portion on the basis of the frame.

Abstract: A developing cartridge includes: a frame defining a developer chamber therein for accommodating developer and being formed with an opening elongated in a longitudinal direction for allowing the developer to flow out of the developer chamber; a member assembled to the frame at a position opposite to the developer chamber with respect to the opening; a seal extending in the longitudinal direction and interposed between the member and the frame; and a protrusion protruding into the seal from at least one of the frame and the member in a protruding direction crossing the longitudinal direction, the protrusion being configured to restrict the seal from moving in the longitudinal direction.

Abstract: A developing device frame unit supporting a regulating member regulating the layer thickness of developer on a developer carrier. The unit includes a frame having a seal forming portion, first and second, first and second end seals contactable to the carrier surface to prevent carrier-axial-direction leaking of the developer, and a blade sealer sealing between the regulating member and the frame to prevent developer leaking when the regulating member is mounted. The blade sealer is an elastomer resin material which is injection-molded with a metal mold and in the seal forming portion where the end seals are provided. The blade sealer connects the end seals with each other, and a protrusion provided by a squeezed-out portion of the resin material is provided by injecting, into a space defined by the metal mold, the seal forming portion, and the end seal seals, a resin material volume larger than a volume of the space.

Abstract: A cleaning device includes a cleaning member that cleans a surface of an image carrier by removing developer from the surface of the image carrier, the developer remaining on the surface of the image carrier instead of being transferred onto a transfer body; a housing that receives the developer removed by the cleaning member; a transporting member provided in the housing, the transporting member transporting the developer toward an end of the image carrier in a rotational axis direction; a first sealing member that fills a gap between the image carrier and the housing at an upstream side in a transporting direction of the developer; and a second sealing member that fills a gap between the image carrier and the housing at a downstream side in the transporting direction of the developer, the second sealing member having a denser structure than the structure of the first sealing member.

Abstract: A toner container includes a main casing, a shutter, and a seal member. The main casing accommodates toner and is formed with a communication hole through which an interior and an exterior of the casing communicate. The shutter is selectively movable between an open position and a closed position for opening and closing the communication hole, respectively, and in either one of an opening direction and a closing direction. A shutter base portion includes edges, one positioned downstream of the other in the closing direction; and a folded portion. The seal member, configured to encircle the communication hole, is disposed between the casing and the shutter in the closed shutter position. The base portion slidingly contacts the seal member when the shutter moves between the open and closed positions. The folded portion is folded at one edge to be positioned opposite to the seal member relative to the base portion.

Abstract: A developing device configured to prevent a leakage of developer through a gap between a frame and a longitudinal end of a developer supply roller, includes an elastic bush member, a groove to which the bush member is attached and including an opening to allow an end of the developer supply roller to pass through a seating surface when the developer supply roller is mounted on the groove in a direction intersecting the longitudinal direction, an abutment portion for regulating movement of the bush member in the longitudinal direction, and a bearing member configured to rotatably support an end of the developer supply roller and compress, in the longitudinal direction, the bush member sandwiched between the abutment portion and the bearing member and bias the bush member against an inner wall of the groove.

Abstract: A developing device includes first and second frames; a developer carrying member; an end portion seal, provided in the first frame, for sealing between an end portion and the first frame to prevent leakage; a sheet, provided in the second frame in contact with the developer carrying member along the rotation axial direction of the developer carrying member; a filler filling a space defined by the first and second frames, the end portion seal and the sheet at a connecting portion where the end portion seal and the sheet contact each other; and a projected portion provided in the first frame and projected into the space, the projected portion is spaced from the second frame, the end portion seal in the rotation axial direction.

Abstract: A developing apparatus for an image forming apparatus includes a frame having a developer container; a developing roller; a blade for regulating a developer layer thickness on the roller, the blade including a base end portion supported by the frame, and a free end portion contacted to the roller; and an elastic seal provided between the frame and the blade to prevent leakage of the developer from the developer container in an axial direction of the roller at an end portion, wherein in a state before the roller is mounted to the frame, a thickness of the seal, measured in a compression direction in which the seal is compressed by the blade, is larger in a free end portion side than in a base end portion side with respect to a direction crossing with the axial direction.

Abstract: A development device used for an image forming apparatus includes a frame member, a developer bearing member configured to develop a latent image formed on an image bearing member using developer, and an edge portion sealing member provided between an edge portion in a rotational axis direction of the developer bearing member and the frame member to prevent the developer from leaking to an outside of the development device from between the edge portion and the frame member, and including, in a state of being compressed between the edge portion and the frame member, a layer that includes an aggregate of a plurality of foam cells in which a foam cell communicating with an adjacent cell via a communication hole and a foam cell not communicating with an adjacent cell are mixed in a direction from an inside of the development device to the outside thereof.

Abstract: An image formation apparatus is provided, to which developing devices, each having an opening, and developer cartridges for respectively supplying a developing agent to the openings of the developing devices are mountable. The apparatus includes developing device shutters, each configured to open and close a respective one of the openings of the developing devices mounted to the apparatus; and a link mechanism configured to move the developing device shutters linked with each other.

Abstract: A developer storage device includes a rotation member including a shaft portion protruding from a main body thereof; a support member formed with a hole by which the shaft portion is supported; and a first seal member disposed between the main body of the rotation member and the support member and including a hole into which the shaft portion is inserted. The support member includes a step portion. The step portion includes a first restraint section which restrains motion of the first seal member in an axial direction of the shaft portion, and a second restraint section which restrains motion of the outer periphery of the first seal member in a radial direction of the shaft portion.

Abstract: A developing device is provided which includes a developer carrier configured to carry developer and rotate, a developing frame configured to rotatably support the developer carrier, and a seal member disposed between the developing frame and an end portion of the developer carrier in an axial direction of the developer carrier. The seal member includes a base and a mesh textile disposed on top of the base and configured to contact the developer carrier. The mesh textile includes interlacing warp threads and weft threads such that there are spaces between adjacent warp threads and adjacent weft threads.

Abstract: A toner cartridge includes: a main body; a shutter; a toner seal; and a shift member. The main body defines an internal space for accommodating toner and formed with a communication hole, through which an interior and an exterior of the main body communicate. The shutter is movable between an open position in which the communication hole is open and a closed position in which the communication hole is closed. The shutter is also shiftable between a first position in which the shutter is positioned away from the main body and a second position in which the shutter is positioned close to the main body. The toner seal is disposed between the main body and the shutter when the shutter is in the closed position. The shift member is configured to shift the shutter from the first position to the second position when the shutter is in the closed position.

Abstract: An image forming apparatus includes: a photosensitive drum; a developing roller; a supply roller; and a cleaning roller. The developing roller supplies developer to the photosensitive drum. The supply roller supplies developer to the developing roller and has a supply roller body. The cleaning roller collects developer on the photosensitive drum and has a cleaning roller body. Axial end faces of the cleaning roller body and axial end faces of the supply roller body are at the same position in the axial direction, or the axial end faces of the cleaning roller body is positioned outward of the axial end faces of the supply roller body in the axial direction. The cleaning roller rotates in one of a forward direction and a reverse direction at a contact portion where the cleaning roller contacts the photosensitive drum. The cleaning roller rotates at a peripheral speed slower than a peripheral speed of the photosensitive drum when rotating in the forward direction.

Abstract: A sealing device usable with an ink developer unit including a plurality of rollers and a plurality of end cap members includes a first replaceable compliant sealing member and a latch member. The first replaceable compliant sealing member has a plurality of replaceable seal exterior surfaces to form a seal between a first set of rollers of the plurality of rollers and one of the end cap members. The latch member has a closed state to maintain a sealing force on the first replaceable compliant sealing member and an open state to remove the sealing force on the first replaceable complaint sealing member.

Abstract: A developer supply device including a developer carrying body, extending in a width direction, configured to carry developer and a casing including an wall, extending in the width direction, disposed between a first room on which the developer carrying body is disposed and a second room configured to store the developer is provided. The first room and the second room communicate each other through an opening formed above the wall. The wall includes end portions having a first height and a central portion. The central portion is disposed between the end portions and has a second height which is higher than the first height.

Abstract: A development device includes a developer containing part containing two-component developer, a cylindrical developer carrier to carry by rotation the developer to a development range, a first developer transport member disposed in the developer containing part, to supply the developer to the developer carrier while transporting the developer in an axial direction of the developer carrier, and a magnetic field generator disposed inside the developer carrier, having three developer-carrying magnetic poles, consisting of a development pole to generate a first magnetic field in the development range, a pre-development pole to generate a second magnetic field to transport the developer supplied from the developer containing part to the development range, and a post-development pole to generate a third magnetic field disposed between the first magnetic field and the second magnetic field, to transport the developer to a release position where the developer is separated from the developer carrier.

Abstract: A developer supply device is provided, which includes side seal members each of which is disposed to extend across a casing-side facing portion of a casing and a supporting-member-side facing portion of a board supporting member, the casing-side facing portion and the supporting-member-side facing portion facing one of both ends of a developer carrying surface in a first direction, the developer carrying surface being a cylindrical circumferential surface of a roller main body which surface is formed parallel to the first direction to carry development agent thereon. Each of the side seal member is configured to slide in contact with one of both ends of the developer carrying surface in the first direction while filling in a gap between the casing and one of both ends of the roller main body in the first direction.

Abstract: A developing device comprising: a developing roller; a casing that includes a developer storage unit; a roller supporting unit and an opening; and a seal member that is mounted on the casing outside the opening in the central axis direction and faces an end portion of the developing roller, the seal member configured to rub against the end portion of the developing roller when the seal member is elastically deformed, wherein the casing includes: an outer projection that is provided along a moving direction of the developing roller to abut on an outer end portion of the seal member, the outer projection protruding in a position which is inside the roller supporting unit; and an inner projection provided along the outer projection so as to abut on an inner end portion of the seal member, the inner projection protruding in a position which is outside the opening.

Abstract: A developing device includes a seal member adhered to a frame along an axial direction of a developing roller. The seal member seals between the frame and an outer peripheral surface of the developing roller. The frame has a seal supporting surface extending along the axial direction, on which the seal member is supported in a cantilevered fashion. The seal member includes a sheet-like member and an elastic adhesive member. One end portion of the sheet-like member is fixed to the seal supporting surface through the elastic adhesive member, and the other end portion is in contact with the outer peripheral surface of the developing roller. The elastic adhesive member has a first surface adhered to the sheet-like member and a second surface adhered to the seal supporting surface, and at least one slit is formed along the axial direction from the second surface toward the first surface.

Abstract: A developing cartridge and an image forming apparatus employing the same which include a developer sealing configuration to prevent a developer in a developing chamber of the developing cartridge from leaking during a distribution process are disclosed. The developing cartridge of an image forming apparatus, the developing cartridge including: a developing housing which accommodates therein a developer and includes an opening through which the developer is supplied to the outside; an image carrier which is mounted in the developing housing; a developing roller which is mounted in the opening of the developing housing to face the image carrier and develops an image on the image carrier; and a sealing member which includes a sealing part partially provided between the image carrier and the developing roller in a sealing location and sealing the opening and a grip part extended from the sealing part to an outside of the developing housing.

Abstract: A device is disclosed. The device contains a roller, a housing configured to accommodate the roller, at least one seal comprising a first material, wherein the at least one seal is disposed between the roller and the housing, and at least one second material disposed adjacent to the seal.

Abstract: A development device includes a casing storing development agent, a developing member that is rotatably supported in an opening of the casing and configured to hold development agent thereon, a first seal member that extends in a first direction parallel to a rotational axis of the developing member and has a base end at a side of the casing and a free end contacting an entire length, in the first direction, of the developing member, and an elastic member disposed between the casing and the free end so as to face the entire length, in the first direction, of the developing member. The elastic member presses the free end against the entire length, in the first direction, of the developing member.

Abstract: A development apparatus for an image forming apparatus includes a first sealing member provided in the supporting portion and configured to seal a gap between a peripheral surface of the development roller and the frame member at one end side of the frame member in the axis direction to prevent the developer from leaking from the frame member; and a second sealing member made of a resin and configured to seal the through hole, and the first sealing member, the supporting portion, and the second sealing member are arranged in this order on the same plane perpendicular to the axis direction.

Abstract: Disclosed are a developing unit and an image forming apparatus having the same. The developing unit includes a partition frame provided separately from the housing of the developing unit. The partition frame is supported within the housing of the developing unit in such a manner to define a path of movement of developer within the housing through an opening formed in the partition frame. A removable sealing member is detachably arranged on the partition frame to prevent developer leakage during storage or transporting of the developing unit. The installation of the removable sealing member is made easier by the partition frame provided separately from the housing.

Abstract: A consumables storage container has an opening through which consumables are supplied. The consumables storage container includes a seal detachably attached to the opening to seal the opening, a part ID storage disposed on the seal, and a positioning holder to position and hold the seal at a prescribed position where the part ID storage is readable after the opening is unsealed.

Abstract: A developing device including a first frame including a first welding surface and a second frame including a second welding surface, wherein the first frame and the second frame are welded so that the first welding surface and the second welding surface are opposite to each other, and wherein the developing device further includes: a seal member that is adhered to a first adhesion surface of the first frame and a second adhesion surface of the second frame, wherein the seal member covers a first side end portion from a first side in an orthogonal direction at an opposite part, where the first welding surface and the second welding surface are disposed opposite one another; and a filling agent that is filled between the seal member and the first side end portion in the orthogonal direction at the opposite part.

Abstract: A developing device includes a developing container, provided with an opening, for containing a developer; a developing roller, provided at the opening, for forming a developer image on an image bearing member; a seal member, provided at the opening along an end portion of the developing roller, for preventing toner leakage from a gap between the opening and the developing roller; and a developer supplying roller, including a core material and a cylindrical elastic member which is provided around the core material and is contacted to the developing roller, for supplying the developer to the developing roller. The cylindrical elastic member has an end surface and a central portion with respect to a longitudinal direction thereof. The end surface has an outer diameter larger than that of the central portion so as to be in non-contact with the seal member.

Abstract: A developer containing device for containing a developer includes a partition arranged between an outer space and an inner space for containing the developer, a bearing arranged on the partition, a rotation shaft carried by the bearing and extending from the outer space to the inner space, a sealing member arranged on the inner space side, having one end side fixed to the partition and the other end side being in contact with a surface of the rotation shaft, and thereby isolating the bearing from the inner space, a communication groove arranged at the surface of the rotation shaft, and connecting the outer space to a closed space isolated from the inner space by the sealing member, and a communication passage arranged on the partition for connecting the outer space to the closed space.

Abstract: A developing device includes: a frame having an opening; a developer carrying member rotatably supported to the frame; and a side seal. The developer carrying member is rotatable about its axis in a rotating direction and has an axial end portion in an axial direction. The side seal is disposed between the frame and a peripheral surface of the axial end portion, and has a contact member contacting the peripheral surface. The contact member includes: a first seal member disposed adjacent to an edge of the opening in the axial direction; and a second seal member disposed adjacent to and upstream of the first seal member in the rotating direction. The first seal member permits developer to move inward in the axial direction and provides a mobility of developer therein higher than that of the second seal member that is made of a material that restricts movement of developer.

Abstract: A developing device includes: a frame; a developer carrying member rotatably supported to the frame; and a side seal. The developer carrying member is rotatable about its axis in a rotating direction and has an axial end portion and a remaining portion inward of the axial end portion in an axial direction. The side seal is disposed between the frame and a peripheral surface of the axial end portion and includes: a contact member that can contact the peripheral surface; a support member disposed between the contact member and the frame; and a double-sided tape for adhering the contact member to the supporting member. The contact member includes: a first seal member; and a second seal member disposed adjacent to and upstream of the first seal member in the rotating direction. The first seal member and the second seal member are affixed to one adhesive surface of the double-sided tape.

Abstract: An image forming apparatus detects the presence or absence of a toner seal and whether a cartridge is loaded on a main body of the image forming apparatus without use of an additional redundant detection means, due to the provision of an electrically-conductive layer at the toner seal for sealing and closing an opening in a process cartridge including a developer container.

Abstract: A sealing member for use in an electrophotographic image forming device according to one example embodiment includes a molded body formed of an elastomer material and internal lubricant additives. The lubricant additives include at least about 20% by weight of the molded body. The lubricant additives include a wet lubricant, a dry lubricant and rounded beads.

Abstract: An electrophotographic printer includes a rotatable photoreceptor adapted to receive dry toner and a rotatable toning member arranged with respect to the photoreceptor to supply toner thereto. A seal includes a complaint contact member and a non-contact member. The contact member is arranged in mechanical contact with the photoreceptor. The non-contact member is spaced apart from the surface of the toning member by a selected non-zero distance, the selected distance being greater than zero. This reduces dusting.

Abstract: A longitudinal end portion of an opposing magnetic member of a developer supporting rotator is positioned more longitudinally outside than a longitudinal end portion of a toner supporting side magnetic member. With respect to the opposing magnetic member facing the toner supporting side magnetic member and a downstream magnetic member disposed more downstream than the opposing magnetic member in a rotational direction, a magnetic force generated in a vicinity of both longitudinally end portions thereof is greater than a magnetic force generated longitudinally inside thereof. A housing includes a sealing portion that projects from a position facing a face at a longitudinal end portion of the developer supporting rotator toward the face, such that the sealing portion prevents the toner in a space between the face and an inner face of the housing from scattering outside.

Abstract: A cartridge for containing toner material used in an image-forming device according to one example embodiment includes a developer roll, two J-seals that provide interfaces with the developer roll at the ends thereof, and an air duct that conducts airflow across the interfaces to cool the developer roll and seals. The air duct is an unitary structure including an elongated hollow body and a pair of nozzles in fluid communication with the hollow body. One of the nozzles is disposed at a distal end of the developer roll near one J-seal, and the other of the nozzles is disposed at a proximal end of the developer roll near the second J-seal.

Abstract: A toner box for being detachably mounted in a developing unit of an image-forming device, includes: a main body; a shutter; a shutter cover; and a toner seal. The main body is configured to accommodate toner therein and has a main-body-side communication through-hole, through which an interior and an exterior of the main body communicate. The shutter is disposed so as to be capable of moving between an open position in which the shutter opens the main-body-side communication through-hole, and a closed position in which the shutter closes the main-body-side communication through-hole. The shutter cover is configured to cover part of the shutter. The shutter cover has a cover-side communication through-hole at a position corresponding to the main-body-side communication through-hole to allow communication of toner through the main-body-side communication through-hole.

Abstract: A developing apparatus, including: a developer container; a toner bearing member including a roller portion; a seal; a regulating member; and a development entrance sealing member, wherein the seal includes a contact portion which contacts the roller portion, wherein the contact portion includes a low-friction region including a material on at least a part of a contact surface with the roller portion, wherein the low-frictional region including the material has frictional resistance between the contact surface and the roller portion lower than frictional resistance between the contact portion without the material and the roller portion, and the material reduces the frictional resistance at the contact surface, and wherein a circumferential surface of the roller portion contacting the low-friction region is arranged to face outward in a longitudinal direction of the photoconductor from a contact region of the cleaning unit with the photoconductor.

Abstract: A cleaning device wherein a cleaner container is provided with an opening, opposing an image bearing drum, for permitting a developer removed from the drum by a cleaning member to enter the container. The cleaning member is fixed at a downstream side of the opening with respect to a rotational moving direction of the drum. The container is provided with a fixing surface for a flexible sheet at an upstream side of the opening with respect to the direction. The sheet is fixed to the fixing surface at an end portion thereof opposite an end portion thereof where the sheet contacts the drum, and at an end portion of the fixing surface with respect to a drum axis direction, the fixing surface protrudes toward a upstream side with respect to a rotational moving direction of the drum beyond a central portion of the fixing surface.

Abstract: A developing device includes a casing having an opening extending in a first direction, a developing roller, a thickness-regulation portion, a sealing member and a contact portion. The thickness-regulation portion includes a thin-plate member and a regulating portion. The thin-plate member has a base end portion fixed to the casing and a free end portion to which the regulating portion is fixed. The thin-plate member has a lateral end extending in a second direction. The regulating portion has an end face extending in a direction. The sealing member is disposed on the thin-plate member and in intimate contact with the end face of the regulating portion. The contact portion is fixed on the thin-plate member at a position closer to the lateral end than the sealing member to the lateral end and made of a material whose hardness is higher than that of the sealing member.

Abstract: A developer transporting mechanism includes a pipe-like transporting path, sealing member, shutter, and urging member. The pipe-like transporting path, through which a developer is transported, has an discharge port at part of its side surface. The shutter is slidable along the surface of the sealing member to open and close the discharge port. The urging member urges the shutter in a direction in which the discharge port is closed. The sealing member is secured to the outer circumferential surface of the pipe-like transporting path. The sealing member also has a reduced part; its dimension in a width direction orthogonal to a direction in which the shutter moves is gradually reduced from the upstream end in the closing direction of the shutter toward the downstream end.

Abstract: A development device includes a developer bearer to carry by rotation developer to a development range facing a latent image bearer, and a developer regulator to adjust an amount of developer transported to the development range by the developer bearer. Multiple projections are formed in a surface of the developer bearer, and the developer bearer rotates in a reverse direction to a direction of rotation for image development while image development is not performed. The developer regulator includes a blade having a first end held by a regulator holder and a second end that contacts the multiple projections formed in the surface of the developer bearer and is disposed in a direction counter to the direction of rotation of the developer bearer for image development.

Abstract: Conventionally, when a developer is supplied into a developer receiving apparatus from a developer supply container using the air, a filter is provided in the developer receiving apparatus side, but the pressure feeding type wherein a mixture of the air and the developer is continuously fed from the developer supply container into the developer receiving apparatus side involves a problem of filter clogging. The developer supply container side is provided with a pump portion which effects a suction operation for moving the air from inside of the developer receiving portion to the developer accommodating portion side and a discharging operation for moving the air from the inside of the developer accommodating portion to the developer receiving portion side. By this, a back washing effect of dusting the developer from the filter is applied to the filter portion during the suction operation, so that the clogging of the filter is suppressed.

Abstract: A developing device includes : a first developing body that develops a developing agent image on a development surface using a developing agent; a second developing body that develops a developing agent image on the development surface using the developing agent; and a sealing member that is disposed between a region where a first delivery pole and a second delivery pole are opposed to each other and the development surface, and adjacently to the first developing body and the second developing body at distances so small that developing agents formed as magnetic brushes on a first conveyance pole and a second conveyance pole respectively can touch the sealing member to secure sealing to prevent the developing agent from leaking to the outside of a device body.