Abstract: A developer supply device, comprising a casing having: a developer reservoir at a bottom part of the casing; a developer amount adjustment chamber provided close to a side of the developer reservoir to communicate with a top portion of the developer reservoir; and a communication part through which the top portion of the developer reservoir and the developer amount adjustment chamber communicate with each other, and further comprising: a carrying substrate having electrodes arranged along a developer transport path to carry a developer through a traveling electric field, each of the electrodes having a longer side extending in a width direction of the developer reservoir, and a developer providing unit to provide the developer into the developer reservoir, and wherein the carrying substrate comprises an upper carrying substrate on an inner wall of the casing on an opposite side of the communication part to carry the developer upward.

Abstract: Background development in a multi-color electrophotographic printer is reduced. A print job including a plurality of separations is received. Each separation has an image area and a non-image area. A printer is provided, including a development member for supplying toner to a photoreceptor for each separation. A developing and a non-developing zone are determined for each separation, corresponding to the image area and non-image area, respectively. Developer is automatically supplied to the development members, and automatically removed developer from the respective non-developing zone of each development member.

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 developer supply device is provided, which includes a developer fluidizing unit including a movable member that moves in a moving direction identical to a developer transfer direction while contacting a predetermined contact range of a developer transfer surface of a transfer board disposed along an inner wall of a developer storage section, which developer fluidizing unit fluidizes development agent stored in the developer storage section by movement of the movable member, and a developer level adjusting unit that adjusts a level of the development agent stored in the developer storage section to be higher than a downstream end of the predetermined contact range of the developer transfer surface of the transfer board in the moving direction of the movable member.

Abstract: A development device includes a developing roller composed of an elastic body. An intermediate roller made of metal is disposed closely to the developing roller so as to face the developing roller. A magnetic roller is disposed closely to the intermediate roller so as to face the intermediate roller. A developer layer composed of a magnetic carrier and a toner is formed on the surface of the magnetic roller. The developer layer is carried to the intermediate roller side, and only the toner in the developer layer is transferred to the intermediate roller. A toner layer formed thus is transferred from the intermediate roller to the developing roller, and brought into contact with the surface of an image carrying member.

Abstract: A developer supply device is provided, which includes a developer retrieving member disposed to face a developer holding surface of a developer holding member across a predetermined distance in a position downstream relative to a developer supply position where the developer holding member faces an intended device to be supplied with development agent in a direction perpendicular to a main scanning direction parallel to an axial direction of the developer holding member. The developer retrieving member is driven to rotate around an axis parallel to the main scanning direction and configured to retrieve the development agent from the developer holding surface under a retrieving electric field that is generated when a retrieving voltage is applied between the developer retrieving member and the developer holding member.

Abstract: A method and apparatus transfer a material from first roller within a container to at least one second roller, and transfer the material from the second roller to at least one third roller. The second roller and the third roller form a loading nip at a location where the second roller is closest to the third roller. The method and apparatus transfer the material from the third roller to at least one recipient device, and measure current flow between the second roller and the third roller using a measurement device. Then, the method alters the relative rotation rate difference between the first roller and the second roller based on the current flow to maintain a predetermined density of the material at the loading nip using a controller.

Abstract: A developing apparatus performs image visualization processing by electrostatically adhering toner carried on a developer carrying member onto an electrostatic latent image formed on an image carrying member. In the developing apparatus, the toner to be supplied to the developer carrying member is directly injected onto the developer carrying members after flying inside an electric field generated immediately before reaching the developer carrying member. The electric field has one of a homopolarity and a reverse polarity to the electrostatic latent image.

Abstract: An image forming apparatus including: an image bearing member; and a developer bearing member bearing a developer including a toner and a carrier, the developer bearing member developing an electrostatic image formed on the image bearing member with the developer, and the developer bearing member being applied with an alternate voltage in order to form an alternate electric field between the developer bearing member and the image bearing member, wherein assuming that electric field intensities Eb and Ed be Eb=|(Vp1?VL)/D| and Ed=|(Vp2?VL)/D|, a relationship, 0?K1>K2, is satisfied, where K1: a gradient at Ed, and K2: a gradient at Eb, and wherein a resistivity ?b of the carrier at the electric field intensity Eb satisfies 1.1×106×en<?b<6.0×107 [?·m] (where: e is the base of natural logarithms; and n=4×Eb×10?7).

Abstract: An image forming apparatus is disclosed. The image forming apparatus includes a photosensitive body, a magnetic roller disposed at a predetermined distance from the photosensitive body, and a donor roller disposed between the photosensitive body and the magnetic roller. The donor roller has a diameter larger than the closest distance between the photosensitive body and the magnetic roller. The image forming apparatus includes gap rings and pressing device to maintain desired gaps between the magnetic roller and the donor roller and between the donor roller and the photosensitive body.

Abstract: A developing device of an electrophotographic image forming apparatus has a first roller and a second roller disposed in a peripheral contact with the first roller to define a contact region therebetween so that the first roller is capable of supplying and collecting a toner to and from the second roller in the contact region. The first roller has a core and a polyurethane foam layer. The polyurethane foam has an open ratio of cells of 2% or more and 50% or less and a hardness of 1 gf/mm or more and 6 gf/mm or less, the hardness being defined by a load per unit length in a longitudinal direction of the first roller, the load being determined by forcing the peripheral surface of the polyurethane foam layer against a substrate, measuring a load necessary for the polyurethane foam layer to be compressed by 30% in thickness, and dividing the load by a length of the polyurethane foam layer in the longitudinal direction.

Abstract: A toner supplying roller is provided in which a polyurethane foam layer can be obtained without decreasing the reactivity of the polyurethane material, and in which contamination by a catalyst remaining in the polyurethane foam layer is suppressed, so that a good image can be obtained. Moreover, the toner supplying roller has suitable aperture cells in the surface, suitably performs the scraping off of the development residual toner and toner supply between the toner supplying roller and the developing roller, and forms a uniform toner thin film on the developing roller, so that a good image can be obtained. In a toner supplying roller including a polyurethane foam layer that is formed on the mandrel periphery using a polyurethane material including a polyol and a polyisocyanate, the polyol and the polyisocyanate have an amine number of 3 mg KOH/g or more and 15 mg KOH/g or less in total.

Abstract: A developing device capable of smoothly dispersing a developer in a development container and an image forming apparatus having the developing device. The developing device includes a development container which contains a developer and has an opening, a development roller which is mounted near the opening of the development container, a conveying member which is movably mounted in the development container to supply the developer to the development roller and moves forward and backward in a direction of the opening, and at least one dispersing member which operates according to the forward/backward movement of the conveying member to disperse the developer in the development container.

Abstract: An image developer, including a developer container containing a developer developing a latent image on a latent image bearer; a developer bearer bearing the developer, located close to or contacting the latent image bearer; and a developer feeding and collection roller feeding the developer onto the developer bearer and scraping the developer therefrom, rotating while contacting thereto with pressure, wherein the developer feeding and collection roller includes an inner layer formed of an electroconductive foamed rubber; and an outer layer formed of an insulative foamed rubber, and wherein the following relationship is satisfied: ??T wherein ? represents a compression amount of the pressure of the developer feeding and collection roller to the developer bearer; and T represents a thickness of the outer layer, and wherein an offset voltage having a polarity opposite to that of the charged developer is applied to the developer feeding and collection roller.

Abstract: A developing device includes a developer supporting member for supporting developer and a developer charging member disposed to face the developer supporting member for charging and supplying the developer to the developer supporting member. The developer supporting member has a surface having a calculated average surface roughness Ra between 0.1 ?m and 0.6 ?m and a surface free energy SFE between 15 mN/m and 26 mN/m. Further, the developer charging member has an Asker F hardness Haf between 24° and 56°.

Abstract: A developing device includes a developer accommodating chamber containing a developer; a developer carrying member for carrying the developer to develop an electrostatic image; a feeding belt for feeding the developer toward the developer carrying member by rotation of the driving roller in a stretched state in which the feeding belt is stretched by a driving roller and a follower roller; and a switching mechanism for switching the feeding belt from a loosened state in which the feeding belt is looser than in the stretched state to the stretched state.

Abstract: A developing cartridge includes: a developing roller main body; a developing roller shaft, which is arranged along a central axis line of the developing roller main body, and which protrudes from both end portions of the developing roller main body along the central axis line, wherein the developing roller shaft includes a small diameter part located at a first end portion in the axis line direction, the small diameter part having an outer diameter smaller than an outer diameter of a second end portion opposite to the first end portion; and a developing gear that is fixed to the first end portion of the developing roller shaft.

Abstract: A developer supply device includes a developer-carrying body having a developer-carrying surface that faces an intended device in a first position and moves in a moving direction, a first transfer board that faces the developer-carrying surface in a second position upstream relative to the first position in the moving direction and transfers the developer to the second position in a direction opposite to the moving direction in the second position, an electrification member facing the developer-carrying surface in a third position downstream relative to the second position and upstream relative to the first position in the moving direction, and a second transfer board that faces the developer-carrying surface in a fourth position downstream relative to the first position and upstream relative to the second position in the moving direction and transfers the developer to a developer storage section in a direction identical to the moving direction in the fourth position.

Abstract: A developing device for developing an electrostatic latent image on an image carrier by supplying a one-component developer to the image carrier. Good images can be obtained over long periods of time, without printing history becoming apparent on account of residual developer. The developing device has a developer carrier that is rotatable and disposed facing an image carrier; and a conductive developer supply and recovery member rotatably arranged so as to abut the developer carrier. The rotation direction of the conductive developer supply and recovery member is opposite to the rotation direction of the developer carrier at a position where the developer carrier and the conductive developer supply and recovery member abut each other. A contact pressure P between the developer carrier and the conductive developer supply and recovery member is set so as to satisfy the relationship 0 (kPa)<P<5.0 (kPa).

Abstract: A developing device is provided that facilitates developing agent delivery upward. A cartridge includes a developing roller, a supply roller, and a container disposed below the supply roller. The container can have an upper portion formed with an opening having upper and lower edges. A conveying member can be rotatably disposed in and in rotational contact with an inner surface of the container for delivering the developing agent upward. The developing agent container can include a first wall portion for receiving developing agent through the opening. The first wall portion extends from the lower edge in a downstream direction with respect to a rotational direction of the conveying member toward a bottommost portion of the supply roller. The container also includes a second wall portion extending from the upper edge in an upstream direction. The conveying member can be in simultaneous sliding contact with the first and second wall portions.

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: In an image forming apparatus, a toner carrier roller rotatably mounted to a housing that stores toner rotates to convey toner to an opposed position facing a latent image carrier outside the housing. A plurality of convex sections are regularly arranged on a surface of the roller in an axial direction parallel to the rotational axis and in a circumferential direction orthogonal to the axial direction and parallel to a circumferential surface of the roller and a concave section surrounds the convex sections. A seal member abuts the surface of the roller moving from the outside toward the inside of the housing at a position downstream of the opposed position in a rotation direction of the roller to prevent toner leakage from inside the housing. The roller moves relative to the seal member in the axial direction.

Abstract: An apparatus includes an upstream transport surface TSa which, while facing a circumferential surface DS of a developing roller, is disposed upstream of an area (developing area) in the vicinity of a latent image forming surface LS, and a downstream transport surface TSb which, while facing the circumferential surface, is disposed downstream of the developing area. The apparatus forms electric fields on the upstream and downstream transport surfaces for moving a charged developer T from an upstream side toward a downstream side. In the apparatus, the transport speed of developer on the upstream transport surface is higher than that on the downstream transport surface. As a result, there can be lowered a speed at which the developer which has not adhered to the circumferential surface and has reached a downstream end portion of the upstream transport surface flies out toward the vicinity of the developing area.

Abstract: Provided are charge-controlled polyurethane foam by which the influence of electrification by friction between toner on the surface layer of a toner-conveying roller and a developing roller can be sufficiently prevented and by which a good image can be stably obtained with a low cost, and a toner-conveying roller using the same. The charge-controlled polyurethane foam is the one wherein the surface layer of the polyurethane foam is impregnated with a charge control agent which is on the negative side or on the positive side in the triboelectric series with respect to substrate polyurethane foam. The toner-conveying roller is the one which supports the charge-controlled polyurethane foam on the periphery of the axis of the roller.

Abstract: A developing device that can be formed at low cost and without increasing the complexity of a die structure of a casing comprises a development roller, a supply roller, a developing portion having an agitating member, a toner hopper disposed above the developing portion, an agitating member in the toner hopper, a partitioning member provided between the developing portion and the toner hopper and having an opening portion, and a collected developer storage portion forming portion for forming a storage space for collected toner collected from the development roller by the supply roller within a fixed distance of the supply roller such that the collected toner moves to the vicinity of the agitating member in the developing portion in accordance with a developer flow generated by the rotation of the supply roller.

Abstract: The developing unit includes a developing section, a developer container, and a partition wall. The developing section includes a developer-bearing member, a supplying member, and a conveying member. The developer container is positioned adjacent to the developing section and configured to contain the developer. The partition wall is positioned adjacent to the conveying member and configured to separate the developing section and the developer container. The partition wall has a supply port, and a return port. A downstream end of the conveying member in a developer conveying direction is extended axially outward with respect to the supplying member. The return port faces the downstream end of the conveying member.

Abstract: A toner supply roller of an electrophotographic imaging apparatus and a method of preparing the toner supply roller are provided. The toner supply roller includes a polyurethane foam, and a metal shaft inserted in the polyurethane foam along an axis thereof, wherein the polyurethane foam includes an ion-conductive agent and a binder, and the binder includes a resin having an amide bond. Accordingly, the toner supply roller including polyurethane foam provides an improved toner supply and prevents image defects.

Abstract: A developer unit for an image forming apparatus is provided. The developer unit includes a developer device having a developer agent carrier, a developer agent supplier, and a restricting member, a developer agent container, which contains the developer agent, and a plurality of conveyers, including a first conveyer and a second conveyer, to convey the developer agent in an axial direction of the developer agent supplier. The first conveyer and the second conveyer are arranged along a circumference of the developer agent supplier and in parallel with the first conveyer.

Abstract: A development agent supply device includes a casing having an opening and a development agent storage section, a development agent holding member housed in the casing such that a development agent holding surface thereof faces a developer-supplied device via the opening, a first electric-field transfer board that transfers development agent with a traveling-wave electric field along a down-facing development agent transfer surface in a predetermined direction from the development agent storage section to the opening and faces the development agent holding surface at a downstream end in the predetermined direction, and a second electric-field transfer board that includes a first section facing an downstream end of the first electric-field transfer board in the predetermined direction, and a second section facing the development agent holding member and transfers development agent received from the first electric transfer board at the first section, to the second section with a traveling-wave electric field.

Abstract: A developing device including a developer bearing member configured to feed a developer to an image bearing member; a developer supplying member, which is contacted with the developer bearing member at a first nip while opposed thereto and which is configured to supply the developer to the developer bearing member; and a developer layer forming member, which is contacted with the developer bearing member at a second nip located on the downstream side from the first nip relative to the rotation direction of the developer bearing member to form the layer of the developer on the developer bearing member, wherein the developer is a nonmagnetic one component developer, and the distance between the front edge of the second nip and the rear edge of the first nip relative to the rotation direction of the image bearing member is greater than 0.8 mm and less than 2.0 mm.

Abstract: Disclosed is a toner supply apparatus that can be employed in an image forming apparatus to supply toner. The toner supply apparatus can include an electrically conductive body, on the surface of which multiple fibers is arranged. The fibers may include nylon 12 fibers containing a conductive material, such as, for example, carbon black.

Abstract: A developing device includes a developer supplying member for supplying developer; and a developer supporting member for supplying the developer supplied from the developer supplying member onto a static latent image supporting member. The developer supplying member includes an outer circumferential portion having an electrical resistivity between 1.2×104 and 1.0×108?.

Abstract: A developer bearing body rotates in a first direction. A supply brush roller, out of contact with the body, also rotates in the first direction. A brush contact member has a first contact portion in contact with bristles of the roller above a first horizontal plane passing through a rotational axis of the roller and upstream in the first rotational direction of the roller, of a portion of the roller opposing the body. A thickness adjusting member has a second contact portion in contact with the body below a second horizontal plane passing through a rotational axis of the body and downstream in the first rotational direction of the body, of the portion of the roller opposing the body. A first vertical plane passing through the first contact portion is closer to the axis of the roller than is a second vertical plane passing through the second contact portion.

Abstract: A developing device includes a developer supporting member having an elastic layer and a surface layer, and a supply member for supplying developer to the developer supporting member. The surface layer is formed of a mixture containing at least an acrylic resin and a polyether type urethane resin. The developer supporting member and the supply member are configured so that the following equations are satisfied: 20?A1?80 0.6?D?2.0 45+0.1×A1×D?F×N?65 where A1 is a weight ratio (%) of the acrylic resin relative to a total weight of the acrylic resin and the polyether type urethane resin, F is an Asker F hardness (degree) of a surface of the supply member, and N is an overlap amount (mm) representing a biting amount of the supply member relative to the developer supporting member.

Abstract: A development agent supply device has a transfer board including a supply section disposed upstream relative to a proximity position in a development agent transfer direction, and a retrieving section disposed downstream relative to the proximity position in the development agent transfer direction. The supply section includes first transfer electrodes arranged along the development agent transfer direction to transfer development agent toward the proximity position with an electric field generated with a supply bias applied to the first transfer electrodes and supply the development agent to the development agent holding surface near the proximity position.

Abstract: A development agent supply device is provided, which includes a development agent holding member configured to rotate around an axis parallel to a first direction such that a development agent holding surface, which faces an intended device to be supplied with development agent in a first position, moves in a second direction perpendicular to the first direction, a transfer board configured to charge and transfer development agent thereon to a second position to face the development agent holding surface, and a facing member disposed to face the development agent holding surface in a position between the first position and the second position in the second direction, the facing member being configured to charge development agent held on the development agent holding surface under an alternating electric field generated between the facing member and the development agent holding member.

Abstract: A developing unit comprises a developing portion, a first developer storage portion and a partitioning wall. The developing portion includes a rotatable developer carrier, a rotatable supply member configured to supply the developer to the developer carrier, a regulating member contacting with the developer carrier to regulate the thickness of the developer on the developer carrier, and a developer feeding member arranged below the regulating member and configured to feed the developer. The partitioning wall is configured to partition between the developing portion and the first developer storage portion. The partitioning wall has a supply port for supplying the developer from the first developer storage portion to the developing portion. The regulating member is contacting with the developer carrier at a contact position located above an upper level of the developer in the developing portion.

Abstract: An aspect of the invention provides a developing unit that includes: a developer; an image carrier on which an electrostatic latent image is formed; a first developer carrier configured to develop the electrostatic latent image formed on the image carrier by causing the developer to adhere to the electrostatic latent image; a first restriction member configured to be in press-contact with the first developer carrier; a second developer carrier configured to abut to the first developer carrier, and to form a developer layer on the second developer carrier; a second restriction member configured to abut to the second developer carrier; and a supplying member configured to supply the second developer carrier with the developer.

Abstract: There is provided an image formation device, comprising: a holding body configured to hold thereon developer and to have a center axis extending in a main scanning direction; and a developer supply unit configured to supply the developer to the holding body through a traveling electric field, the developer supply unit having an opening through which a part of the holding body is accommodated in the developer supply unit. In this configuration, the developer supply unit comprises a sliding member configured to slide on at least a part of a surface of the holding body moving toward an outside of the developer supply unit through the opening.

Abstract: A developing unit of an image forming apparatus includes a developer cartridge detachably mounted on the developing unit, a developing case in which a developing member and a first supply member are provided, a developer supply passage to supply a developer stored in the developer cartridge to the developing case, and a developer supplement unit mounted in a portion connecting the developing case and the developer supply passage, to agitate the developer supplied through the developer supply passage and to supply the agitated developer to the developing case.

Abstract: The first direct-current bias power supply applying the first direct-current bias Vdc1 and the first alternating-current bias power supply applying the first alternating-current bias Vac1 are connected to a development roller. The second direct-current bias power supply applying the second direct-current bias Vdc2 and the second alternating-current bias power supply applying the second alternating-current bias Vac2 are connected to a magnetic roller. The peak-to-peak value Vpp of the first alternating-current bias Vac1 applied to the development roller remains the same, and the second alternating-current bias Vac2 that is in phase with the first alternating-current bias Vac1 and that has a peak-to-peak value of a predetermined value or above is applied to the magnetic roller. Thus, the potential difference between the peak voltage of the development bias on the opposite polarity side to the polarity of the toner and the peak voltage of a supply bias is set at a predetermined value or below.

Abstract: A developing device includes a developer supporting member for attaching developer to a static latent image supporting member supporting a static latent image; and a developer supplying member for supplying developer to the developer supporting member. The developer supporting member has a surface with a static friction coefficient in a range of 0.41 and 1.81. The developer supplying member is pushed against the developer supporting member for a pushing amount in a range of 0.5 mm and 1.5 mm.

Abstract: A developing device that is provided in an image forming device that forms an image includes an image carrier on which an electrostatic latent image is formed; a developer carrier that forms a developer image on a surface of the image carrier by attaching a developer on the electrostatic latent image; a supplying member that supplies the developer to the developer carrier by contacting the developer carrier, and that scrapes the developer remaining on the surface of the developer carrier from the developer carrier, and a deformation amount between the developer carrier and the supplying member is individually configured corresponding to a location where the developing device is provided in the image forming device.

Abstract: A developing apparatus has a developer carrying member carrying a developer thereon, a developer supplying member for supplying the developer to the developer carrying member, and a scraping member for contacting the developer carrying member upstream of the closest position between the developer carrying member and the developer supplying member with respect to the movement direction of the developer carrying member to thereby scrape off the developer from the developer carrying member. There is formed a developer supplying portion surrounded by the scraping member, the developer carrying member and the developer supplying member for supplying the developer from the developer supplying member to the developer carrying member, and the developer scraped off by the scraping member is conveyed to a collecting passage differing from the closest position.

Abstract: The invention provides a developing device, a process cartridge and an image forming apparatus that allow preventing abrupt variations in toner charge on a developing roller, caused by intrusion, into a nip, of toner accumulated above a regulating member of the developing device. A developing device using a one-component developer includes: a supply roller to which one-component developer is replenished, by natural motion, from a developer storing section. The bottom of the developing device is of a size that allows the supply roller to rotate. The developing device further comprises a filling member for filling a space above the regulating member, in order to prevent the toner located above the regulating member from intruding into a nip formed between the supply roller and a developing roller.

Abstract: An image-forming device includes an image acquiring unit, an image forming unit, a determining unit, and a controller. The image acquiring unit acquires image data for one page. The image forming unit forms an image based on the image data. The image forming unit includes a developing roller, a supply roller, and a bias applying unit. The developing roller carries a developer. The supply roller supplies the developer to the developing roller. The bias applying unit applies a first voltage between the developing roller and the supply roller in a first mode, and applies a second voltage between the developing roller and the supply roller in a second mode. The determining unit determines whether the image data includes a part having density greater than or equal to a prescribed density.

Abstract: A development apparatus is provided that can quickly form high quality printing material by steadily supplying developer charged and thinned to a uniform thickness and can also prevent the decrease in the quality of the printing material in a case where the developer carrier and developer supply unit are operated quickly. The toner supply roller is constructed in a manner using the elastic material with a hardness of HAF [degree] set to 20?HAF?80 measured by an Asker F-type and disposed in a manner such that the amount of push ?, defined as the amount pushed by the contact between the developer supply unit and the developer carrier, is 0.5 [mm] or below. In addition, toner supply bias voltage VS [V] applied to the toner supply roller has a frequency f [Hz] of 500?f?5000, and, with VSH and VSL as the peak values of the AC voltage component, fulfill the condition of 1?|VSH?VD|/|VD?VSL?5.

Abstract: An aspect of the invention provides a development device including a rotatable development sleeve which supplies developer to a photosensitive drum, the development sleeve being disposed such that a rotational axis of the development sleeve is orientated toward a vertical direction; a conveying screw which conveys the developer along a rotational axis direction of the development sleeve; and a developer supply guide which guides the developer conveyed by the developer conveying device to the development sleeve. The plural developer supply guides are disposed at predetermined intervals in the rotational axis direction of the development sleeve and between the development sleeve and the conveying screw.

Abstract: A developer supplying member includes a foamed member formed of continuous foams for supplying developer to a developer supporting member. The foamed member has a high resistivity in terms of electrical conductivity through ion conductivity, and has a low resistivity in terms of electrical conductivity after carbon black is attached to foam cell walls thereof.

Abstract: Xerographic imaging modules, xerographic apparatuses including the xerographic imaging modules and methods of making the xerographic imaging modules are disclosed. An embodiment of the xerographic imaging modules includes a photoreceptor roll having a photoconductive surface, a donor roll adjacent the photoreceptor roll for supplying toner to the photoconductive surface, and a toner loading roll adjacent the donor roll for supplying the toner to the donor roll. The toner loading roll includes a core comprised of a foam first material, and a non-porous surface region comprised of the first material. The surface region surrounds the core and forms an outer surface of the toner loading roll.