Abstract: An image forming method which includes the steps of providing a developing agent holder for holding one component developing agent layer arranged to contact a latent image holder, developing a latent image on the latent image holder and to simultaneously clean up the developing agent adhering to the surface a non-latent image area on the latent image holder, wherein the cleaning up is carried out under the condition expressed by the following formula:0.5.ltoreq.(Vd/Vp).multidot.m.ltoreq.3.0wherein ghe moving speed of the developing agent holder is defined as Vd, the moving speed of the surface of the latent image holder is defined as Vp and the developing agent adhering density is defined as m (mg/cm.sup.2), and the amount of the remaining toner after transferring that remains on the latent image phase of the latent image holder is set less than 0.35 mg/cm.sup.2.

Abstract: A transfer device for transferring a toner image on an image carrier onto a transfer material, including a transfer drum, a supporting device for the transfer material in place on the surface of the transfer drum and an electrode for applying a bias voltage to an electroconductive layer of the transfer drum. The transfer drum includes a rotatably supported drum member, a flexible elastomer layer on the peripheral surface of the drum member, and an electroconductive layer on the elastomer layer. The elastomer layer of the transfer drum is made of a foaming elastomer such as a polyurethane foam so that the transfer material is in contact with the toner image on the image carrier under a small amount of pressure and with an ample contact width.

Abstract: Thienodiazepine compounds of the general formula ##STR1## wherein R.sup.1 and R.sup.2 are the same or different and respectively stand for a hydrogen atom, a halogen, an alkyl or an aralkyl, or mean a group wherein R.sup.1 and R.sup.2 combinedly together form a ring; R.sup.3 stands for an oxygen atom, R.sup.4 stands for a hydrogen atom, an alkyl, an alkenyl or a group of the formula --(CH.sub.2).sub.m COOR.sup.6 (wherein R.sup.6 l stands for a hydrogen atom, an alkyl, an alkenyl or an aralkyl and m stands for an integer of 1-6), or R.sup.3 and R.sup.4 stand for a group wherein R.sup.3 and R.sup.4 combinedly together form a group of the formula .dbd.N--N.dbd.C(R.sup.5)-- [wherein R.sup.5 stands for a hydrogen atom, an alkyl, an alkenyl, an aralkyl or a group of the formula --(CH.sub.2).sub.n COOR.sup.7 (wherein R.sup.

Abstract: A developing device effects desirable development when the amount of charging of toner, q (C/g), the amount of toner deposited on the surface of a developing roller per unit area, m (g/cm.sup.2), the speed of movement of the surface of the developing roller, v (cm/sec), the available length of the developing roller, l (cm), and the magnitude of electric resistance between the surface of the developing roller and a power source for developing bias, R (.OMEGA.), are adjusted so as to satisfy the formula, .vertline.q.vertline.m.ltoreq.100/vlR. The developing device produces a developed image desirable in quality and free from background fogging when the magnitude of a developing electric current, I (A), is adjusted so as to satisfy the formula, R.ltoreq.200/I.

Abstract: A developing apparatus is disclosed that employs one-component non-magnetic toner. The apparatus includes a movable developing agent carrier that has a surface polished to a first finish, roughened to a second finish, and then metal plated. The agent carried carries a one-component developing agent composed of non-magnetic toner and supplies the developing agent to an electrostatic latent image. An elastic coating member is disposed to press on the surface of the movable developing agent carrier so that the free end thereof is directed opposite to the moving direction of the movable developing agent carrier, and a toner stirring member disposed in a toner container contiguously to or in sliding contact with the movable developing agent carrier. The apparatus provides a uniform toner layer over a long period of time and supplies stable and high quality images.

Abstract: A developing apparatus comprises a developing roll for carrying a nonmagentic toner thereon, and an elastic blade pressed against the outer circumferential surface of the developing roll to apply the toner thereto. The toner is applied to the surface of the developing roll by the elastic blade to form a thin layer of the toner on the surface of the developing roll. The thin layer is opposed to a photosensitive body to deposit the toner on a latent image on the photosensitive body. The developing roll has a surface which is opposite to the photosensitive body and the whole of which is roughened.

Abstract: A developing apparatus comprises a developing roll for carrying a nonmagnetic toner thereon, and an elastic blade pressed against the outer circumferential surface of the developing roll to apply the toner thereto. The toner is applied to the surface of the developing roll by the elastic blade to form a thin layer of the toner on the surface of the developing roll. The thin layer is opposed to a photosensitive body to deposit the toner on a latent image on the photosensitive body. The developing roll has a surface which is opposite to the photosensitive body and the whole of which is roughened.

Abstract: In a developing device for supplying developer to latent images formed on an image support, a container in which the developer is contained has a sloping bottom. The container has an opening in its top so as to release the developer particles therethrough. The container houses a developer carrier, which is arranged above the sloping bottom of the container with one end located on the lower side of the sloping bottom of the container immersed in the developer particles, and with its other end located on the higher side of the sloping bottom thereof. The developer carrier has a plurality of linear electrodes arranged thereon, starting from one end to the other end, and has an electric field generator connected to these linear electrodes to successively apply voltages to these electrodes so as to generate an electric field which advances according to a lapse of time, whereby the developer particles are carried along the developer carrier, from one end to the other.

Abstract: An ion flow modulator with high reliability used in a photocopying machine to obtain a high quality image.

Abstract: In a recording apparatus of the present invention, a visible image based on image information is formed on an ordinary sheet by a developer. The recording apparatus comprises a developing roller spaced at a predetermined distance from and facing the ordinary sheet and carrying the developer thereon, a recording electrode and a signal source connected thereto, for propelling the developer on the developing roller to the ordinary sheet by generating an electric field between the ordinary sheet and the developing roller according to the image information, a plurality of mutually insulated electrodes provided on the developing roller and extending therefrom in one direction, an A.C. and a D.C. source are connected to the electrodes, for generating an alternating electric field between adjacent ones of the electrodes to cause oscillations of the developer found between the adjacent electrodes along electric lines of force therebetween to thereby liberate the developer from the developing roller.

Abstract: A developing apparatus has a toner carrier having a horizontal portion disposed near the surface of a photoconductive member on which an electrostatic latent image is formed, and an inclined portion having one end portion embedded in a toner. The horizontal and inclined portions having strip electrodes thereon. A voltage circuit applies to the strip electrodes potentials, which change in a stepwise manner as a time function, so as to form electric fields shifting from the inclined portion to the horizontal portion. An opposed electrode is disposed to oppose the inclined portion. A voltage, which is half the maximum value of the potentials applied to the strip electrodes of the toner carrier, is applied to the opposed electrode.

Abstract: A developing device is provided for developing by means of a toner an electrostatic latent image formed on the surface of a photosensitive drum which rotates along one direction at a given speed. The developing device comprises a developing roller movably disposed at a given distance from the photosensitive drum, for causing the toner thereon to move in accordance with the movement thereof, whereby the toner thereon is supplied to the photosensitive drum by means of the surface potential of the electrostatic latent image, and a layer regulating member for regulating the amount of the toner put on the developing roller. The developing roller rotates in other direction at a speed relative to the given speed.

Abstract: A developing device is provided for developing by means of a toner an electrostatic latent image formed on the surface of a photosensitive drum which rotates along one direction at a given speed. The developing device comprises a developing roller movably disposed at a given distance from the photosensitive drum, for causing the toner thereon to move in accordance with the movement thereof, whereby the toner thereon is supplied to the photosensitive drum by means of the surface potential of the electrostatic latent image, and a layer regulating member for regulating the amount of the toner put on the developing roller. The developing roller rotates in other direction at a speed relative to the given speed.

Abstract: An electrostatic copying apparatus comprises a charging/cleaning device which has both a charging function for charging a photosensitive layer and a cleaning function for removing a developer remaining on the photosensitive layer. The charging/cleaning device includes a first common rotatable roller having an electrical conductive contactor on the outer periphery thereof, a voltage applying mechanism for applying a voltage between furs of the contactor and a photosensitive drum. The furs applied with the voltage charge the photosensitive layer and electrostatically attract the developer remaining on the photosensitive layer to clean thereof. The charging/cleaning device further includes a recovering mechanism for recovering the developer attracted to the furs therefrom.

Abstract: A developing apparatus for developing an electrostatic image on an electrostatic image bearing member. The apparatus is provided with a container for storing toner which is a single component developer. A developing brush roller having fur on its peripheral surface transports the toner from the container and applies it to the electrostatic latent image. The developing brush roller is constructed of a core formed with elastic material and a fur formed on the peripheral surface of the core which contacts the surface of the electrostatic image bearing member.

Abstract: A developing apparatus is used with an image forming system provided with a photosensitive layer on which a static latent image is impressed and which is formed of first and second portions having different surface potentials. The developing apparatus comprising a developing roller which is rotatably arranged and fitted with a large number of hairs for feeding a developing agent such as a toner to the surface of the photosensitive layer in contact therewith. The developing agent is attracted to the first portion of the surface of the photosensitive layer with a strong attractive force and to the second portion of the surface with a weak attractive force. The developing apparatus further comprises electrode tube for removing that portion of the developing agent which is attracted to the second portion with the weak attractive force.