Abstract: A method of development includes providing a mixture of non-magnetic developer particles and magnetic particles in a developer supply container, carrying the mixture on an insulating surface of an endlessly movable developer carrying member and confining the magnetic particles within the developer supply container by cooperation of a magnetic pole of a fixed magnetic field generator and a magnetic particle confining member. The method also includes providing an electrode opposed to, and extending in a longitudinal direction of, the carrying member, applying a developer application signal between the electrode and the developer carrying member to apply the developer particles only to such an area as corresponds to application of the developer application signal, and developing a latent image on a latent image bearing member with the thus applied developer particles.

Abstract: An image forming apparatus provided with an image transfer discharger for electrostatically transferring the toner image from an image bearing member to a transfer material. It is further provided with charge removing member for removing charge so as to allow the electrostatically attached transfer material from the image bearing member. The charge removing electrode is supplied with a bias voltage from a power source for the developing device, thus the additional means required for the charge removing electrode is minimized. The discharging electrode extends from a bottom of a recess formed by an insulating member. The recess is larger away from the free end of the discharging electrode toward the outside.

Abstract: An image forming apparatus includes an image bearing member on which a toner image is formed. The toner image is transferred onto a transfer material by contacting the transfer material to the image bearing member and applying corona discharge to the back side of the transfer material. The present invention is characterized by the charge removing needles to which a particular voltage is applied. The voltage is such that the discharge occurs between the charge removing electrode needles and the back side of the transfer material when it is present, or the surface of the image bearing member when it is absent only when the transfer corona discharger is operated, and therefore, the air surrounding the needles is ionized. Thus, the discharge does not occur when the transfer charger is not operated, but occurs automatically when the transfer charger is operated.

Abstract: A corona discharging device having a corona discharging electrode to which a high voltage is applied to produce corona discharge. The high voltage applied to the corona discharging electrode is provided by superposing an AC voltage to a DC voltage. The DC voltage and the AC voltage are determined such that the corona discharging current has only the polarity which is the same as that of the DC component voltage. The corona discharge is stabilized and hardly produces a non-uniform discharge.

Abstract: A developing apparatus for developing a latent image on a latent image bearing member, including a magnetic device for forming a magnetic brush of a developer mixture containing developer particles and magnetic particles; a movable developer carrying member for developing the latent image on the latent image bearing member, the developer carrying member being contactable with the magnetic brush to receive the developer mixture; a magnetic particle blocking member, disposed opposed to the developer carrying member at a position downstream of the position where the developer carrying member is contacted with the magnetic brush, for blocking the magnetic particles to form a coating of the developer particles on a surface of the developer carrying member, wherein the coating of the developer particles is conveyed by the movement of the developer carrying member to a developing station where the latent image is developed with the conveyed developer particles.

Abstract: A developing apparatus includes a developer supply container, having an opening, for containing a non-magnetic developer and magnetic particles, an endlessly movable developer carrying member of a non-magnetic material for carrying a developer, which is movable between an inside of the developer supply container and an outside of the developer supply container through the opening, a magnetic particle confining member, provided to an outer surface of the developer carrying member with a gap, a magnet for generating a fixed magnetic field, having a magnetic pole disposed inside of the carrying member and upstream of the confining member with respect to movement of the carrying member, and a magnet, disposed outside of the carrying member and downstream of the confining member with respect to movement of the carrying member, for forming a line of magnetic force extending therefrom to the confining member.

Abstract: In a method of or a device for preventing disturbance of an unfixed image in an image formation process wherein an electrostatic image on an electrostatic image bearing member is developed by a developer, whereafter the developed visible image is transferred to a transfer medium and then the transfer medium is separated from the electrostatic image bearing member and conveyed for utilization, charge remover is provided along the conveyance path of the transfer medium to remove the charge on the surface of the transfer medium as it passes through the conveyance path, thereby preventing the visible image on the transfer medium from being disturbed.

Abstract: A developing apparatus includes a container for containing a non-magnetic developer and magnetic particles, a developer carrier for carrying the non-magnetic developer toward an image bearing member, a regulating member located adjacent to the non-magnetic developer discharge opening of the container to form a gap between the surface of the carrier and the regulating member, and a magnet positioned adjacent to the carrier at the side of the carrier opposite to the regulating member and causing the magnetic particles to form a magnetic brush upstream of the regulating member adjacent to the developer discharge opening of the container with respect to the direction in which the developer carrier is moved, whereby a thin layer of the non-magnetic developer can be formed on the developer carrier.

Abstract: A developing apparatus, including, a developer supply container, having an opening, for containing a non-magnetic developer and magnetic particles, an endlessly movable developer carrying member of a non-magnetic material for carrying a developer, which is movable between an inside of the developer supply container and an outside of the developer supply container through the opening, a magnetic particle confining member, spaced from outer surface of the developer carrying member with a gap, a magnet for generating a fixed magnetic field, having a magnetic pole disposed inside of the carrying member and upstream of the confining member with respect to movement of the developer carrying member, and a magnet, disposed outside of the carrying member in proximity with the confining member at an upstream side thereof with respect to movement of the developer carrying member.

Abstract: A method of development including the steps of forming a thin layer of developer on a surface of a developer carrying member; opposing the surface of the developer carrying member to a latent image bearing member bearing a latent image to be developed with a clearance therebetween which is larger than the thickness of the thin developer layer at a developing position; and intermittently forming an alternating electric field, as a developing bias, across the clearance.

Abstract: A developing apparatus for developing a latent image includes a container, a developer carrying member movable along an endless path from inside the container to the outside, a magnetic field generator inside the carrying member, a partition member in the container for separately supporting, before operation, a first developer of magnetic particles and a second developer of non-magnetic particles, and a regulating member cooperable with the magnetic field generator. Upon release of the partition member, the first developer forms a base layer on the carrying member and the second developer forms on the base layer and then, upon circulation of the carrying member the second developer is moved past the regulating member.

Abstract: A developing apparatus wherein a thin layer of a non-magnetic developer is formed on a developer carrying member includes a developer container for containing a mixture of non-magnetic developer and magnetic particles; a device disposed adjacent to a non-magnetic developer outlet of developer container with a clearance with respect to a surface of developer carrying member, for regulating supply of the non-magnetic developer to developer carrying member surface; magnetic field generating device, disposed across developer carrying member with respect to regulating device, for forming a magnetic brush of the magnetic particles at the upstream side of regulating device with respect to movement of developer carrying member to confine the magnetic particles within developer container.

Abstract: A developing apparatus includes a container for containing a non-magnetic developer and magnetic particles, a developer carrier for carrying the non-magnetic developer toward an image bearing member, a regulating member located adjacent to the non-magnetic developer discharge opening of the container to form a gap between the surface of the carrier and the regulating member, and a magnet positioned adjacent to the carrier at the side of the carrier opposite to the regulating member and causing the magnetic particles to form a magnetic brush upstream of the regulating member adjacent to the developer discharge opening of the container with respect to the direction in which the developer carrier is moved, whereby a thin layer of the non-magnetic developer can be formed on the developer carrier.

Abstract: A thin developer layer forming device includes a developer supply container, having an opening, for containing a non-magnetic developer and magnetic particles, an endlessly movable developer carrying member of a non-magnetic material for carrying a developer, which is movable between an inside of the developer supply container and an outside of the developer supply container through the opening, rotatable member for generating a magnetic field, disposed in the carrying member, and a magnetic particles confining member, provided outside of the developer carrying member and cooperable with a magnetic pole of the magnetic field generating means to confine the magnetic particles within the developer container, wherein the magnetic field generating member is rotated in the developer carrier to move the magnetic particles in a direction opposite to a direction of movement of the developer carrying member.

Abstract: In a magnet roll comprising a plurality of magnet pieces adhesively secured to a supporting shaft, to increase the magnetic flux density of a particular magnetic pole, the magnet pieces are disposed so that they have repelling magnetic forces in the interface between the magnetic piece having said particular magnetic pole and the magnet piece adjacent thereto. Further, in a unitarily molded magnet roll comprising a unitarily molded magnet secured to a supporting shaft, the cross-sectional shape of the shaft is selected in accordance with magnetized poles, whereby the positions of the magnetic poles are prescribed relative to the shaft and a strong magnetic force is obtained.

Abstract: The image forming method is executed by projecting a light image on a rotatable recording member to consecutively form electrostatic latent images corresponding to the light image, developing the latent images, projecting a predetermined amount of light onto a non-imaged area present between two consecutive latent images on the recording member to form an electrostatic image, detecting potential of the electrostatic image, and controlling the development of the latent images next to the electrostatic image detected during the detection of the potential in response to the detection results.

Abstract: An image formation apparatus has an image bearing member, a process device for forming an image thereon, a developing device provided with a container having an opening opposed to the image bearing member and containing a magnetic developer therein, a developing roller for supplying the magnetic developer to the image bearing member, a magnetic field generating member for generating a magnetic field in the gap formed by the opening and the developing roller, and a grip provided on the opposite side of the apparatus from the image bearing member with respect to the opening to make the apparatus portable.

Abstract: An electrophotographic apparatus in which a pre-transfer corona discharger is provided between a developing device and a transfer charger, an AC is applied to the discharge electrode of the discharger, a grid is provided in the opening portion of the discharger, a potential between the dark portion potential and the light portion potential on a photosensitive member is applied as a bias potential, corona discharge of the same polarity as the charge polarity of toner is imparted to toner adhering the dark portion having a potential greater than the grid bias potential to increase the transfer efficiency, and corona discharge of the opposite polarity to the polarity of toner is imparted to toner in the light portion to change the charge polarity of toner and thereby prevent fog.

Abstract: An electrostatic latent image developing method and a device therefor, featured in supplying one-component magnetic developer onto a developer-feeding non-magnetic bearing member to form thereon a magnetic brush of developer under the effect of a magnetic field, then bringing said magnetic brush into contact with the surface of an image-developing developer bearing member to form thereon a thin uniform layer of the developer, and bringing said thin layer to a developing position to develop an electrostatic latent image formed on a latent image bearing member. At the development the thin layer of the developer is so spaced in the developing position from the latent image bearing surface as to form a clearance therebetween, across which an AC bias electric field is applied.

Abstract: A development apparatus has a developer supporting member having a magnet therein and a thickness controlling member for the developer, the developer being a magnetic one-component developer which is applied to the surface of the developer supporting member by means of the thickness controlling member, the applied surface of the developer supporting member being brought into a position opposed to a latent-image carrying member to develop the latent image thereon, the surface of the developer supporting member being roughened by sand blast treatment with irregularly shaped and/or sized particles.