Abstract: A flexible elongated roller charging blade for use as a replacement in the reycling of toner cartridges used in photoelectric copiers and printers. The blade has a first surface having a semiconductive coating, and a second opposite surface coated with an adhesive to apply to the surface of an initially installed charging blade.

Abstract: The present invention relates to a negatively chargeable toner comprising fine toner particles which contain a thermoplastic resin, a colorant, and a specified compound; the toner externally admixed with inorganic fine particles which have been treated with a hydrophobicizer and a silane coupling agent having a cationic group and/or a silicone oil having a cationic group, and which have a blow-off charge quantity (Q) of −800<Q<0 &mgr;C/g relative to iron oxide particles.

Abstract: A toner metering blade includes an elongated blade holder and an elongated blade element. These components are bonding together, and a toner metering strip is optionally formed on one face of the blade element, in a single molding and material injection operation in which the blade holder is configured to provide a hot runner system.

Abstract: A developing device for an image forming apparatus includes a developer carrier such as a developing sleeve having a magnetic field generating device therein which carries and conveys a developer containing toner and magnetic carrier particles. The developing device also includes a first regulating member such as a blade which regulates the developer being carried and conveyed by the developer carrier, and a developer storing section stores developer scraped off the developer carrier by the first regulating member. The developer storing section includes a second regulating member arranged upstream of the first regulating member with respect to a direction in which the developer carrier conveys the developer. The developing device further includes a toner storing section provided adjacent to the developer storing section to supply toner to the developer carrier.

Abstract: A toner cartridge has a comminuator that prevents the buildup of toner behind the doctor blade that meters the toner delivered to the developer roller for later image development and printing. The comminuator is mounted to, and for movement with, an agitator adjacent to an exit port of the toner hopper. A paddle that rotates within the toner hopper contacts the agitator and generates joint movement of the agitator and comminuator. The comminuator comprises a plurality of spaced blades held by a coupler mounted to the agitator. Alternatively, the comminuator comprises a wire mounted in opposing connectors mounted to the agitator.

Abstract: To prevent formation of a white streaking line on an image by a blade member for a developing unit in an image forming apparatus, a blade member is formed by welding magnetic and nonmagnetic members to each other by laser irradiation. The laser beam is pulsed so that the laser beam irradiating a welding portion is in-focus or out-of-focus.

Abstract: The objects of the invention are to provide a liquid image forming apparatus in which the roughness of the surface of a squeeze roller to remove the carrier in the liquid developer or the excess developing material from the photosensitive member is kept as constant as possible and to provide a squeeze roller and a process for renewing the surface of a squeeze roller. In a liquid image forming apparatus having a squeeze roller 15 in pressure contact with a photosensitive member 1 for wiping off excess liquid developer 6 and a blade 11 for removing the liquid developer 6 adhering to the squeeze roller 15, the squeeze roller comprises a minutely foamed rubber.

Abstract: A developing machine comprising a photosensitive drum for forming an electrostatic latent image on a face thereof, a developing roller for supplying a developing agent to the photosensitive drum, a doctor blade for controlling a thickness of a developing agent layer on the developing roller, a slanted face which is adjacent to the developing roller and prevents movement of the developing agent, a blocking jaw for blocking the developing agent so that a flow of the developing agent is generated and a magnetic roller which is mounted in the developing roller. The magnetic roller is comprised of a plurality of pieces of block magnets which are arranged alternately at particular angles.

Abstract: An image-forming method uses an assembly having a first toner replenishing hopper, a toner storage room, a nonmagnetic cylindrical rotating member provided with a first mixed magnetic field-generating device, a first magnetic blade, a nonmagnetic cylindrical development sleeve provided with a second fixed magnetic field generating device, a second magnetic blade, an electrostatic image holding member, a cleaning device and a second toner-replenishing hopper. At least certain of the foregoing components are set to have specific positional relationships with one another so that the recovered magnetic toner is efficiently reused together with the fresh magnetic toner.

Abstract: A developer amount regulating member includes at least a portion for regulating the amount of a developer, which is made of a polyamide elastomer. The content of a polyamide dimer in the polyamide elastomer is decreased to less than 2500 ppm, thereby suppressing blooming of the oligomer component in long-term use or an environment of high temperature and high humidity, and maintaining the good specularity of the regulating member. Therefore, it is possible to prevent the problem of fogging due to blooming, and provide a high-quality image.

Abstract: A developing device develops a latent image formed on a latent image holding body. The developing device includes a developing roller conveying, with rotation of the developing roller, developer adhered thereto to a developing area in which the latent image on the latent image holding body should be developed, the developer including toner and carriers, a limit member, provided so as to face the developing roller, limiting a height of a layer of the developer on the developing roller, a toner container storing the toner, a toner supply mechanism supplying the toner in the toner container to the developing roller, and a partition member forming a space between the partition member and the developing roller, the toner supplied from the toner container being moved in the space with rotation of the developing roller.

Abstract: An image forming apparatus includes an image bearing member, a developing device to develop a latent image on a surface of the image bearing member, a developer bearing member including a magnet therein, which bears developer on a surface thereof by a magnetic force of the magnet and carries the developer towards a developing position facing the image bearing member by being rotated, a limiting member that is placed facing the developer bearing member so as to limit a thickness of a layer of the developer borne on the developer bearing member, and a developing device casing.

Abstract: A developing apparatus includes a developer bearing member, a first magnetic pole and a second magnetic pole of a same polarity as that of the first magnetic pole, and a regulating member. A regulating portion of the regulating member is provided within a range from a point of the maximum magnetic flux density of the second magnetic pole and an angular point corresponding to a half of the half value width of the second magnetic pole at the downstream side in the rotating direction of the developer bearing member.

Abstract: A developer unit for developing a latent image with marking particles is provided. The developer unit includes a housing defining a chamber for storing a supply of marking particles therein. The developer unit also includes an advancing member for advancing the marking particles on a surface thereof from the chamber of the housing in a first direction toward the latent image. The developer unit also includes a first regulating member for charging the marking particles and for regulating the thickness of the layer of marking particles on the surface of the advancing member. The developer unit also includes a second regulating member spaced from the first regulating member. The second regulating member serves to at least one of charge the layer of marking particles on the surface of the advancing member and regulate the thickness of the layer of marking particles on the surface of the advancing member.

Abstract: An image-forming apparatus is provided that can form good images stably by uniformly and stably charging a non-magnetic single-component developer (such as a toner). In this apparatus, a DC power supply applies a positive voltage Vd to a development roller, and a DC power supply applies a positive voltage Vb to a layer thickness restricting blade. The voltages Vb and Vd satisfy the relationship Vb>Vd+Vt, where Vt is the potential difference in a thickness direction of the layer of toner T adhering to the development roller. The toner T is a suspension polymer toner excelling in fluidity. Accordingly, toner T charged with reverse polarity can be nicely removed. In addition, the action of injecting electric charge to the toner T by the application of the potential Vb to the layer thickness restricting blade 32 is not produced and, even without that action, the toner T can be sufficiently charged by friction-charging produced by the development roller and the supply roller working together.

Abstract: A developing apparatus is provided for incorporation into an image forming machine. The developing apparatus includes a developer accommodating space for containing a developer composition, a series of developing rollers disposed in the developer accommodating space adjacent to each other and in facing relationship to an electrostatic latent image carrier for supplying the developer composition to the image carrier while transferring the developer composition from one developing roller to another, and a developer feed regulator for regulating the transfer of the developer composition between adjacent two of the developing rollers.

Abstract: A developing device which regulates the amount of developer transported on a developing sleeve via a regulating member constructed as a magnetic member, so as to not have large fluctuation in the amount of developer transported by a developing sleeve to a developing region even when there is dislocation in the install position of the regulating member, and which produces excellent images having stable density without image noise.

Abstract: A developer amount restricting member for restricting the amount of developer on a developer bearing member has: (a) an elastic member urged toward the developer bearing member; and (b) a supporting member supporting the elastic member, wherein, when the transverse end portion of the supporting member is supported, the longitudinal end portions of the elastic member warp toward the supporting member.

Abstract: In a development device for developing an electrostatic latent image formed on an image bearing body, the development device includes: a developer bearing body for conveying a developer borne thereon to a developing area on the image bearing body; a plurality of magnetic poles provided inside the developer bearing body; a detaching magnetic pole including optional two adjoining poles of the plurality of magnetic poles which are arranged to have the same polarity as each other for forming a repulsive magnetic field to remove the developer on the developer bearing body; and a magnetic body provided in the vicinity of and spaced away from the detaching magnetic pole, for forming a repulsive magnetic field having the same polarity as that of the detaching magnetic pole.

Abstract: The present invention provides a developing apparatus which comprises a rotatable developer bearing member, a rotatable developer regulating member, a first magnetic portion provided in an opposed relation to the developer bearing member in order to prevent the magnetic toner from leaking at ends of the developer bearing member in a rotation axis direction thereof, and a second magnetic portion provided in an opposed relation to the developer regulating member in order to prevent the magnetic toner from leaking at ends of the developer regulating member in a rotation axis direction thereof, and, in the vicinity of the developer regulating portion, the second magnetic portion is disposed inwardly of the first magnetic portion in the rotation axis direction.

Abstract: A developing unit for an electrophotographic processor includes a developing roller and a doctor blade for controlling an amount of developing material on an outer surface of the developing roller. A developer housing stores the developing material and has an opening for accommodating installation of the developing roller. First and second arm plates are connected to first and second ends of the developer housing, respectively. The first and second arm plates each have an eye into which the developing roller is inserted. First and second protrusions extend outwardly from the first and second arm plates, respectively, and provide surfaces upon which the doctor blade is placed during assembly of the developing unit to ensure a uniform spacial gap between the outer surface of the developing roller and an edge of the doctor blade.

Abstract: A developing device includes a developing sleeve for carrying a magnetic developer, a regulating sleeve for regulating the thickness of the layer of the developer on the developing sleeve, magnets for generating a magnetic field in a layer-thickness regulating portion by the regulating sleeve, and magnetic members provided so as to have a small gap between the circumferences of the developing sleeve and the regulating sleeve. Leakage of the developer from end portions is prevented by forming a magnetic seal by way of a magnetic field between each of the magnetic members, and between the regulating sleeve and the developing sleeve.

Abstract: A magnet roll including a cylindrical permanent magnet having a surface thereon a plurality of magnetic poles which extend along an axis of the magnet roll and an electroconductive ceramic layer formed at least on a circumferential surface of the cylindrical permanent magnet. The electroconductive ceramic layer may be TiC, WC, TiN, TiCN, CrN, ZrN, HfN, Ti+TiN, and Cr+CrN. The magnet roll is used in a developing method of developing a latent image on a photosensitive drum by a magnetic developer while applying a bias voltage to a developing zone, in which the number of the magnetic poles (N) satisfies the relation: N.gtoreq.(V.sub.1 /V.sub.2).times..pi.D/6, wherein V.sub.1 is a peripheral speed (mm/s) of the photosensitive drum, V.sub.2 is a peripheral speed of the magnet roll and D is an outer diameter (mm) of the magnet roll.

Abstract: An image forming apparatus includes an image bearing member on which first and second electrostatic images are formed, a first developing device for developing the first electrostatic image on the image bearing member with a first toner, and a second developing device for developing the second electrostatic image on the image bearing member bearing the first toner image thereon with a second toner. The second developing device has a toner carrying member opposed to the image bearing member and carrying the toners thereon. The force with which the first toner, having mixed into the second developing device, is carried on the toner carrying member is smaller than the force with which the second toner is carried on the toner carrying member.

Abstract: A toner cartridge of a laser printer, copier or facsimile machine has various strips in it for various functions. Among the strips are recovery blades, spreader blades, wiper blades, certain shipping seals, doctor blades and other miscleaneous strips. A device and method is shown that enables any strip or modular shipping seal to be ergonomically installed in a userfriendly way by leaving a strip of protective liner protruding from the strip for easy removal. Also, a device and method for attachment of strips is shown that utilizes a positioning tab stiffener device for userfriendly easy insertion of said strip into a toner cartridge, laser printer, copy cartridge or facsimile machine. After the positioning tab is used to install the strip, the positioning tab stiffener device is removed from the strip assembly. By using preferential 2-sided tapes or transfer tapes that are removable on one surface, the positioning device tab may be removed easier.

Abstract: A developing device according to the present invention has a developer carrying member for conveying a developer to a developing area opposite to an image carrying member with the developer held on its surface and a controlling member for controlling the amount of the developer conveyed to the developing area upon being pressed against the surface of the developer carrying member, the surface of the developer carrying member and/or the surface of the controlling member pressed against the surface of the developer carrying member being composed of an elastic material having a rubber hardness of 20.degree. to 70.degree. and having elongation of 400 to 1200%.

Abstract: A blade controls a layer thickness of the developer and/or triboelectrically charges the developer on a surface of the developing roller in an electrographic imaging device. The blade is a longitudinally extended member made by punching a thin resilient plate of metal in a press mold, and a tip portion thereof has a curved tail part having a smooth surface and a gradually reduced thickness formed as a shear drop upon punching.

Abstract: A developing device for use in an image forming apparatus is constructed such that a pair of upper and lower auger rollers 35 and 34 are arranged in the vicinity of a toner supply port 21A, thereby to transport toner from the toner supply port 21A through a spiral tooth 34A of the lower auger roller 34 toward both ends of the supply roller 20 and from the both ends through a spiral tooth 35A toward the toner supply port 21A, thus circulating toner above the toner supply roller 20 in its both side directions, and that a position of the toner supply port 21A of a toner cartridge 21 corresponds to respective center positions 35C and 34C of the upper and lower auger rollers 35 and 34.

Abstract: It is an object to obtain a blade 1 with which coating or scraping can satisfactorily be performed and which is able to protect a plate-like member 3 from being broken.A blade having a ceramic plate-like member 3 having an edge 3a and secured to the surface of an elongated metal plate 2 in the leading end portion of the elongated metal plate 2, wherein the blade 1 is deflected by 10 cm or more in the direction of the thickness thereof owning to the deadweight without breakage of the ceramic plate-like member 3 when the blade 1 is supported at two ends thereof which are apart from each other by 1 m or longer in the lengthwise direction thereof.

Abstract: A developer carrying member includes a substrate, the surface of which is covered with a conducting layer. The conducting layer contains a binder resin and conducting spherical particles dispersed therein having a number average particle diameter of from 0.3 .mu.m to 30 .mu.m and a true density of 3 g/cm.sup.3 or below.

Abstract: A developing apparatus is provided for developing an electrostatic latent image on a latent image carrier by supplying the latent image carrier with a developer. This developing apparatus includes a toner accommodating chamber for accommodating magnetic toners. The apparatus also includes a developing roller, having a plurality of fixed magnetic pole members and sleeves provided along peripheries of the fixed magnetic pole members and rotating thereabout, for feeding the developer composed of magnetic carriers and magnetic toners to the latent image carrier. The apparatus further includes a developing chamber having a partition wall formed along the developing roller and assuming a configuration adapted to a shape of the developing roller, and a toner supply port for supplying the magnetic toners to the developing chamber from the toner accommodating chamber.

Abstract: An image forming device which allows reducing a linear velocity ratio of a developing roller against a sensitive body, which enables a pole pitch of a magnetic field generating layer to be miniaturized, and which generates a uniform and adequately thick toner layer on the developing roller. A toner regulating element formed by a sheet metal material having elasticity and non-magnetic characteristics elastically contacts a surface of the developing roller. The developing roller has an elastic body layer and a magnetic field generating layer having a minute pole pitch. The toner regulating elements serves to regulate a thickness of the toner layer without vibration induced from the pole pitch of the magnetic field generating layer. Thus, the toner layer can be uniform and of an adequate thickness, and reducing the linear velocity ratio of the developing roller against the sensitive body does not generate any drawbacks.

Abstract: A development device of this invention includes a developer carrier for transporting a developer to a development region opposite to an image bearing body as binding the developer thereto by means of a magnetic force, and a regulating member opposing the developer carrier across a required distance therebetween and regulating the amount of developer transported by the developer carrier to the development region, the regulating member having a greater roughness at its surface opposite to the developer carrier than the developer carrier.

Abstract: An electrophotographic image-forming method in which a thin layer of a developer is formed on a developing roll by an elastic doctor blade tangentially contacting with the surface of the developing roll, and an image-bearing member and the developing roll are brought into contact with each other in a developing zone because either of which is made flexible. In the method of the present invention, the toner remaining on the surface of the image-bearing member is effectively removed and recovered in the developing zone. This prevents the background fogging. The flexible structure of either of the image-bearing member and the developing roll prevents the surface of the image-bearing member from being damaged to ensure a printed image of high quality.

Abstract: A compliant doctor blade has a metal bar (13) with bottom attached by dual side adhesive tape (15) to a resilient layer of porous foam (7). The bottom of the foam layer is attached by dual side adhesive tape (8) to a shim (1), which is stiff in the direction of movement of the roller (9) which the shim contacts. The shim has a polyester body (3) and a bottom layer (5) containing abrasive grit and conductive carbon black. Finally, the end of the doctor blade is dipped in a conductive paste which hardens into a conductive coating (17) which bridges the conductive layer of the shim and the metal bar. Advantages are reduced costs and improved performance, particularly with respect to streaks from prenip packing.

Abstract: A developing device for an image forming apparatus such as a copying machine, a printer, or the like to develop an electrostatic latent image on an image carrier includes a toner carrier which moves while carrying a toner on its surface, and a regulating member for regulating the amount of toner on the toner carrier by applying a moving force to the toner in a direction opposite to the moving direction of the toner carrier. In a regulating portion defined by the regulating member, a convey force received by a toner portion, which does not contact the surface of the toner carrier, from the regulating member is larger than a convey force received from the toner carrier.

Abstract: In a developing device for an image forming apparatus and of the type using a developer consisting of toner and magnetic carrier, a toner hopper has an opening for replenishing toner stored therein. The developer is regulated by a doctor blade to form a thin layer on a developing sleeve. The developer scraped off by the doctor blade is introduced into a developer storing chamber and caused to move toward the opening of the hopper due to its own internal pressure and gravity. The developer from the hopper is returned toward the doctor blade along the surface of the sleeve. The developer on the sleeve and regulated by the doctor blade is conveyed to a developing position where the sleeve faces an image carrier. The toner contained in the developer is a magnetic toner. When the toner concentration of the developer has reached an upper limit, a space or gap exists in the developer storing chamber.

Abstract: A method and apparatus for delivering a uniform supply of toner to a development zone in an electrostatographic system is disclosed. Additional toner control in the form of magnets located near the donor member attract toner to the toner pick-up area and insure that a constant supply of toner reaches the development zone. The additional control of toner is especially useful when the supply of toner to the toner pick-up area is limited or the toner does not naturally flow to the toner pick-up area.. The toner supply is enhanced by a stationary magnet located adjacent the donor member and a magnet located on the charge metering blade. Both of the additional toner supply magnets form magnetic brushes of toner particles on the donor member surface, these magnetic brushes insuring a constant supply of toner to the development zone despite problematic development conditions.

Abstract: A developing device which develops an electrostatic latent image formed on an image-bearing member in an image forming apparatus. The developing device has a developer transporting member for transporting a developer to the image-bearing member, and a rotatable regulating member provided at an upstream side from the developing region with respect to a transporting direction of the developer transporting member for regulating an amount of the developer held on the developer transporting member. The regulating member includes a regulating portion which has a section wherein a distance from a rotational axis of the regulating member to periphery of the regulating portion is not fixed.

Abstract: A development apparatus having a development sleeve for carrying and transporting a magnetic developer, a regulating roll for controlling the thickness of a layer of the developer on the development sleeve, a first magnetic pole provided in the development sleeve in the vicinity of a position of layer thickness control by the regulating roll, a second magnetic pole provided in the regulating roll to form a magnetic field for restraining the developer in cooperation with the first magnetic pole. The first and second magnetic poles are provided on the upstream side of a straight line connecting a center of the development sleeve and a center of the regulating roll in the direction of transport of the developer by the development sleeve so that the following inequalities are satisfied:0<.theta..ltoreq..alpha./2, , 0.ltoreq.r.multidot.sin .phi.<R.multidot.sin .theta.where .alpha. is an angle of a half-value width of a magnetic flux density distribution of the first magnetic pole; .theta.

Abstract: A developer amount controlling member which has a support layer for controlling pressure and an elastic layer for controlling triboelectricity provided thereon, wherein both end portions of the developer amount controlling member are curved from the central portion thereof towards the elastic layer side.

Abstract: An electrophotographic processor containing an image forming apparatus such as a laser printer, a copying machine, and a facsimile machine, is capable of regulating the thickness of toner layer formed on a developing roller so as to be a mono-layer. The electrophotographic image forming apparatus includes: a photosensitive drum rotating at a constant speed; a charging roller for charging a surface of the photosensitive drum; a developing roller for forming a toner image on a electrostatic latent image of the photosensitive drum by transferring toner from the developing roller to the drum; a supplying roller for supplying toner agitated by an agitator; and a doctor blade for regulating the toner layer on a developing roller device so as to be a uniform thickness. The doctor blade contacts the surface of the developing roller at a specific edge thereof, and is affixed to a bracket for supporting the doctor blade at an upper portion thereof, the bracket being affixed to a frame of a developing unit.

Abstract: An apparatus for developing an image by using spherical non-magnetic toner particles has a latent image carrier on which a latent image is formed by a potential contrast, a toner transporter having a surface for transporting the spherical non-magnetic toner particles to the latent image carrier, and an elastic blade having a surface for passing the spherical non-magnetic toner particles transported by the toner transporter through a gap between the surfaces of the toner transporter and elastic blade, thereby forming a thin toner layer which is charged. The toner transporter develops an electrostatic latent image on the latent image carrier with the thin toner layer which is charged. Surface roughnesses of the elastic blade and of the toner transporter are different from each other, and the spherical non-magnetic toner particles are rotated between the elastic blade and the toner transporter and charged electrostacially.

Abstract: A compliant doctor blade having excellent toner metering capabilities is disclosed. The doctor blade includes a compliant laminate (3) having a resin film backing layer and carrying a binder which contains abrasive particles, such as silicon carbide particles, and a conducting means. In a preferred embodiment the conducting means are conductive carbon black particles which are contained in the resin binder which also includes the abrasive silicon carbide. The compliant laminate is supported on an aluminum bar (1). The bar has fastened to its bottom face a compliant foam layer (2) which includes on its bottom face a shim (10) having a stiffness of from about 0.5 to about 31.0 inches of deflection/inch of length/pounds of force. The laminate is bent under the foam layer and shim where it contacts the developer roller (6). The conductive layer remains conductive as it wears during use.

Abstract: An elastic blade is provided with a rubber layer and a surface resin layer provided on the rubber layer, the surface resin layer satisfying the following condition:3.ltoreq.E.times.t.ltoreq.30,whereE: elastic modulus of the surface resin layer (Kg/cm.sup.2);t: thickness of the surface resin layer (cm).

Abstract: A developing apparatus includes a developer carrying member for carrying developer, opposed to an image bearing member for bearing an electrostatic image; a regulating member for regulating an amount of the developer to be applied on the developer carrying member; and electric field generator for generating an oscillating electric field between the developer carrying member and the regulating member; wherein the amount of the developer to be applied on the developer carrying member is regulated to no less than 0.6 mg/cm.sup.2 and no more than 1.5 mg/cm.sup.2 by the regulating member.

Abstract: A method of developing an electrostatic latent image on a rotating image-bearing member with a magnetic developer in which a developing roll consist of only a permanent magnet member and the peripheral speed of the developing roll is regulated to be nearly equal to the moving speed of an image-bearing member. With such a construction, an electrophotographic recording apparatus can be miniaturized while producing an image of high quality.

Abstract: A developing apparatus includes a developer carrying member for carrying a magnetic developer. The developer carrying member is provided with a plurality of magnetic poles. The apparatus also includes a regulating member for regulating the layer thickness of the developer on the developer carrying member, and an elastic rotatable member, disposed upstream of a developer regulating position of the regulating member with respect to a movement direction of the developer carrying member, for supplying the magnetic developer onto the developer carrying member. A surface of the elastic rotatable member is composed of unicellular foamed material.

Abstract: A developing unit including a housing having an opening defining a developing zone, an applicator for applying particulate developer through the opening towards an electrostatographic image to be developed, and a paddle wheel for agitating developer within the housing, for scooping up developer from within the housing and projecting scooped-up developer towards the applicator. A hopper, located outside the width of the development zone supplies toner to the housing, and a primary spiral screw conveys developer from the hopper across the width of the development zone in one direction, while a secondary spiral screw receives developer from the primary spiral screw and conveys developer across the width of the development zone in an opposite direction. A passageway outside the width of the development zone enables the return of developer from the secondary spiral screw to the primary spiral screw.

Abstract: In an image forming apparatus, a developing device of the type developing an electrostatic latent image formed on an image carrier by using single-component type toner has a regulating member for regulating the amount of the toner fed thereto, a first conveying member for conveying the toner regulated by the regulating member and deposited thereon, and a second conveying member for conveying the toner transferred from the first conveying member thereto to the image carrier. The first and second conveying members are each movable at a particular speed in a particular direction. The device is free from problems attributable to oppositely charged toner particles despite the use of the single-component type toner and, in addition, insures attractive images.