Abstract: A method and apparatus of electrophotography used for a printer or a copying machine, wherein a toner having no photoconductivity is applied on a surface of a photoconductive layer of a photoreceptor consisting of a transparent conductive layer and the photoconductive layer which are sequentially formed on a transparent substrate. The photoconductive layer is exposed from a side of the transparent substrate. Toner particles on an exposed region of the photoconductive layer are transferred to toner-receiving paper opposite the photoconductive layer so as to form a toner image. A process for developing a latent image can be omitted. In addition, a special toner such as a photoconductive toner having low sensitivity is not used, thereby forming a high-quality image.

Abstract: The present invention is aimed at reading picture image information of an original by illuminating the original with light and by receiving the transmitted or reflected light from the original. The picture image reader in accordance with the present invention includes an optical sensor for reading picture image information by receiving light from the original that is illuminated by light, a moving mechanism for relatively moving the optical sensor and the original, an overlapping mechanism for overlapping a portion of the reading region for picture images, in the reading of picture images by the optical sensor, and a synthetic picture image formation circuit for synthesizing picture image of the overlapped portion so as to have the picture image coincident with the picture image in the original, based on each picture image information that are read in overlapped manner.

Abstract: In a color picture reproducing apparatus, a color light receiving element array has light receiving element which are arrayed in one line and have color separation filters. At least three light receiving elements are assigned for each pixel. The apparatus picks up color signals for each pixel, and reproduces a color picture for each pixel using these picked up color signals. The color signals, which are derived from the pixels of the array on which a portion of a color picture, such as an edge of a black character picture is imaged, inevitably contain errors arising from positional differences between the light receiving elements in one pixel. The errors deteriorate the quality of a reproduced picture. To prevent this, a color signal processing circuit is arranged to interpolate the color signals from adjacent pixels according to the positions of the light receiving elements in one pixel. A signal interpolating circuit for the signal interpolation may separately be provided.

Abstract: A method for driving a light scanning apparatus having a drive means which drive a scanning unit in accordance with input signals. The cycle of scanning is divided into a plurality of periods. Drive signals of different levels are supplied to the drive means during said periods, respectively.

Abstract: A laser scanning apparatus for scanning a stationary document, which comprises a laser beam deflecting means for deflecting a laser beam such that it scans the stationary document in a main scanning direction, a movable optical means provided between the laser beam deflecting means and stationary document and serving to deflect the laser beam such that it scans in an auxiliary scanning direction substantially at right angles to the main scanning direction, and an optical detecting means moved together with the movable optical means and receiving the scattered beam component from said document.

Abstract: A light beam scanning device for scanning by a light beam a member to be scanned which is subjected to relative continuous feeding, comprising a main-scanning means for causing said light beam to scan said member to be scanned in a direction vertical to the direction in which it is fed, and a correcting sub-scanning means for causing said light beam to scan said member to be scanned in the direction in which it is fed, whereby the loci of scanning of said light beam on a surface to be scanned of said member become substantially parallel.

Abstract: A valve sealing device is proposed consisting of two parts, one of which contacts the body of the valve and is made of an expanded graphite compact or an expanded graphite--inorganic binder composite compact, and the other of which contacts the valve member and is made of a carbonaceous material--metallic material composite, a carbonaceous material impregnated with an inorganic binder, or a metallic material; a valve using such a sealing device is also proposed.