Abstract: An electrostatic reproducing apparatus comprising a charged particle modulating electrode unit, wherein the common electrode and the control electrode are divided into a plurality of the groups, respectively, in the direction in which the particle passing apertures are arranged. Each of thus divided common electrode groups is disposed in a staggered manner with respect to the corresponding control electrode groups, and the same electric potential is applied to two adjacent common electrode groups opposed to that control electrode group through which a charged particle is to be modulated. The control electrode groups are disposed in such a manner that a boundary between two adjacent common electrode groups is aligned with the center line of the opposed control electrode group. At least one of the surfaces of said charged particle modulating electrode unit is provided with a solid state scanning system of wiring formed integrally therewith.

Abstract: An electrostatic recording apparatus comprising an ion modulator, a driving circuit for transforming a first image signal into a second image signal and for applying said second image signal to the ion modulator, a member for forming electrostatic latent image, and a photon coupled isolator. A voltage of the second image signal is higher than a voltage of the first image signal. The first image signal is supplied to the driving circuit through the photon coupled isolator. The ion modulator is a multilayered ion modulator comprising a layer of insulating material, a continuous layer of conductive material and a segmented layer of conductive material on the other side of said insulating layer. Each segment of the segmented conductive layer is insulatively isolated from each other segment. The multilayered ion modulator has at least one of row of apertures formed therethrough. A segment of the segmented conduction layer is formed around each aperture.

Abstract: A copying machine comprising an image signal generating unit including a solid image pickup element for converting an optical image into an electric signal; an ion generating source; and an electrostatic image forming unit including an ion control electrode. The ion control electrode has a control electrode and a common electrode arranged to face each other through an insulating layer and formed with fine openings arranged in a row or in plural adjacent rows. At least one of the electrodes being divided into such a plurality of blocks as has its one or plural openings electrically insulated at a close spacing across the aforementioned arranged openings and as are wired to receive electric signals from the aforementioned image signal generating unit, the common electrode being operative to control the flow of ions, which are directed toward a charge holder, if necessary, together with the control electrode in response to a bias voltage applied.

Abstract: A recording apparatus in which the coordinates of a portion of an image to be extracted or erased are determined, a scanning position is detected, and an image signal is switched for blocking or allowing the passage of image signals when said predetermined coordinates coincide with said detected position. An extrction means for extracting a portion of a document image or, an erasure device for erasing a portion of a document image, a designating device for designating a portion to be extracted or erased, and a numerical device for introducing the coordinates of the portion to be extracted or erased are provided.

Abstract: An electrostatic reproducing apparatus, in which the ion flow passing through an ion modulating electrode and reaching a reproducing member is increased by strengthening the electric field between the electrode of the ion modulating electrode and the reproducing member. Ion transmissive apertures formed in the ion modulating electrode is made to have a larger diameter at its ion outlet than at its ion inlet so that the ion transmission factor may be improved. Condenser electric field generating means such as an electrode for generating an electric field to converge the ion flow toward the ion transmissive aperture of the ion modulating electrode is mounted on the common electrode of the ion modulating electrode at its inlet so that the ion flow of the ion generator using the corona wire may be highly dense.

Abstract: A method for image reproduction using an ion modulation electrode adapted to form images on a charge receptor. The ion modulation electrode is divided into a plurality of groups, and digital or analog image signals are held in element corresponding to the group and are formed parallel signals, and the parallel signals are applied to respective groups. The ion modulation electrode includes a continuous layer of conductive material, a segmented layer of conductive material and an insulating layer interposed therebetween. An image reproducing apparatus which includes an ion generator, an ion modulation electrode dividing electrically into a plurality of groups and modulating ion flow generated the ion generator, and a charge receptor receiving modulated ion flow. To the groups are applied image signals which are held in element corresponding to group and are formed parallel signals.

Abstract: An ion modulating electrode to form an electrostatic image on the image recording member by modulating the ion flow includes a multi-layer structure consisting of a first conductive layer and a first dielectric layer, a second conductive layer, and a second dielectric layer and a third conductive layer, stacked together in that order to form a multi-layer structure, through-apertures formed in this multi-layer structure, and a dielectric or semiconductive thin film coated on the first conductive layer or third conductive layer. A high-frequency voltage is applied between the first conductive layer and the second conductive layer to produce ions in these apertures. A voltage is applied to the third conductive layer for enhancing the passage through the apertures of ions generated in these apertures by high frequency voltage. The thin film covers a part of the inside of the apertures.

Abstract: An image reproducing apparatus includes an ion modulating electrode and a device for imparting oscillation thereto. The ion modulating electrode is formed of a continuous layer of conductive material, a segmented layer of conductive material, an insulating layer interposed between the continuous and segmented layers, and at least a row of apertures for modulating ion flow generated by a charge generator. At least one embodiment of the device for imparting oscillation includes a rotor or cam rotatable to apply oscillation to a receiving plate. In another embodiment, the oscillation imparting device is formed of a permanent magnet, a coil placed in the magnetic field generated by the magnet, an oscillator for applying an alternating current to the coil and an oscillation element connected to the coil.