Abstract: Disclosed is an electronic ignition signal distributor for automobile engine, in which cylinders of the engine are identified using an ignition sequence counter and basing on the reference position signal and crank angle signal. The cylinder identity signal is taken AND with the distributed ignition position signal before being applied to the ignition device, thereby preventing the delivery of an active ignition signal in the event of a malfunctioning of the counter or cylinder identifying circuit, and ultimately preventing an erroneous ignition of irrelevant cylinders caused by a noise or the like.

Abstract: An improved method of controlling toner concentration for electrophotographic copying apparatus employing a dual component developing material which is composed of toner particles and magnetic particles. The method is arranged to detect the amount of magnetic particles adhering onto a photosensitive member for controlling the toner replenishing amount according to the amount of the magnetic particles thus detected.

Abstract: In a method of controlling a 4-stroke cycle internal combustion engine for automobile, when only a positional signal, which is generated each time the crank shaft of engine is rotated once, is first generated after the start of engine, only the fuel injection control is immediately made. When both the positional signal and a reference cylinder signal which is generated each time the crank shaft is rotated twice are generated after the start of engine, the fuel injection control and ignition control are made.

Abstract: A magnetic brush developing apparatus includes a material transport guide member extending from a developing material supply position to a developing region, in addition to a rotatable developing sleeve having an inwardly disposed rotatable manetic roller driven for rotation in the same direction as the sleeve. A clearance is maintained between the guide member and the outer peripheral surface of the developing sleeve to allow transport by the rotation of the magnetic roller of developing material, having magnetic carrier particles and electrically insulative toner particles, from the developing material supply position along the outer surface of the guide member to the developing region in a direction opposite to the direction of rotation of the magnetic roller and developing sleeve.

Abstract: A method for developing by a plurality of times, an electrostatic latent image carried on a surface of an electrostatic latent image support member through employment of developing sleeves having magnetic rollers to be driven for rotation provided therein, which includes the steps of effecting the developing for each of the plurality of times, with the magnetic roller being rotated under such a state that developing irregularities in a direction intersecting a relative moving direction of the electrostatic latent image support member with respect to the developing sleeve, are formed in a developed image when the developing for each of the plurality of times is effected independently, causing pitches of the developing irregularities to coincide with each other, and deviating phases of the respective developing irregularities so that the respective developing irregularities are offset to each other so as to obtain the developed image having a uniform and sufficient image density without developing irregularitie

Abstract: An electrophotographic copying apparatus which is capable of controlling copied image density under the state where the density variation of the line image and that of the solid image are generally kept constant, with a simultaneous increase of the amount of density variation for the line image.

Abstract: The present invention is concerned with a developer removing device for a copying apparatus. An electrostatic latent image is developer by a magnetic brush developing using a developer mix of magnetic carriers of small diameter and insulative non-magnetic toner charged to polarity opposite to one another and in which some of the magnetic carriers are transferred onto the background portion of the latent image. The developer removing device has a structure for removing the magnetic carriers adhering to the background portion at least either by magnetic force or electrostatic force.

Abstract: An improved magnetic brush developing method for use in electrography which employs a dual-component developing material including electrically insulative magnetizable particles and electrically insulative non-magnetizable particles. In the developing method, magnetic attractive force exerted on the magnetizable particles located at the developing position where a magnetic brush of the developing material formed on a developing material support member is in rubbing contact with electrostatic latent images on a recording medium, is made larger than the electric repelling force acting on the magnetizable particles for preventing the magnetizable particles from adhering to the recording medium.

Abstract: A magnetic brush developing apparatus for use in an electrophotographic copying machine for developing an electrostatic image and utilizing a developer which is constituted by non-magnetic particles and magnetic particles. The apparatus includes a rotatable multipole magnetic member within a rotatable developing sleeve for transporting developing material affected by the magnetic member in a direction opposite the direction of rotation of the sleeve, at least one cleaning member for removing part of the developer which is at most only slightly affected by the magnetic member and transported in the direction of rotation of the sleeve, and at least one resilient scraping member for scraping the affected developer from the surface of the sleeve and being sufficiently resilient to allow the slightly affected developer material to pass between the scraping member and the sleeve so as to avoid buildup of the slightly affected developer between the scraping member and the sleeve.

Abstract: The present invention provides a magnetic brush developing apparatus for developing latent electrostatic images with a particulate magnetic developer which comprises:(a) a rotatable non-magnetic developing sleeve,(b) first drive means connected to said sleeve for rotating said developing sleeve in a specified direction,(c) a magnetic roller rotatably disposed within the developing sleeve,(d) second drive means connected to said magnetic roller for rotating the magnetic roller in the same direction as the developing sleeve to transport said magnetic developer along the peripheral surface of the developing sleeve in a direction opposite to the direction of rotation of the developing sleeve,(e) a brush bristle height adjusting plate member having one end in pressing contact with the peripheral surface of said sleeve and a developer guide surface at an acute angle with respect to a tangent to said sleeve, said tangent extending in the direction of rotation of said sleeve, for scraping developer particles moving i

Abstract: An electrographic developing method comprising forming a magnetic brush of a developer composed of at least two components of insulating toner particles and insulating carrier granules, and brushing a surface bearing an electrostatic latent image with the brush to render the latent image visible, the carrier granules having the properties of (1) triboelectrifying the toner particles to a polarity suitable for developing the latent image by coming into frictional contact with the toner particles, (2) being magnetic, (3) having a resistivity of at least 10.sup.12 ohm-cm, and (4) being 5 to 40 .mu.m in size.

Abstract: An improved developing material supplying device for use in a developing apparatus of an electrophotographic copying machine which includes a developing material supplying roller having at least one developing material measuring recess formed by cutting the peripheral surface of the supplying roller into flat shape and rotatably provided at a developing material supplying opening of a developing material storage tank, a driving mechanism for the supplying roller, a developing material measuring regulating member provided where the recess of the supplying roller at the supplying opening is rotated from inside to outside of the storage tank, and a shield member capable of covering the entire surface of the recess and provided where the recess at the supplying opening moves from outside to inside of the storage tank.

Abstract: A developing material for use in a dry developing electrophotography process which comprises an electrically insulating magnetizable toner including at least resin and magnetizable fine particles, and fine particles of resin different from the electrically insulating magnetizable toner in their position on the frictional electrical charging row. The electrically insulating magnetizable toner and fine particles of resin are mixed in a predetermined rate to form the developing material of the invention.

Abstract: A dry process developing apparatus for use in an electrophotographic copying machine which includes a developing non-magnetizable sleeve and a multipolar magnet member arranged to be rotated in the same direction at different speeds, the speed of rotation of the developing sleeve causing movement of those particles of the developing material which at the most are only slightly affected by the multipolar magnet member in the direction of rotation of the sleeve, and the speed of rotation of the multipolar magnet causing the movement of particles of developing material affected by the magnet around the sleeve in a direction of rotation opposite that of the magnet and at a speed greater than the speed of the developing sleeve. Scraping members are provided for sliding contact with the peripheral surface of the developing sleeve in the directions against and following the direction of rotation of the developing sleeve.