Abstract: A toner image transfer type electrographic copying apparatus is disclosed which comprises an endless image carrier, at least two support rollers around which the endless image carrier is wrapped, a drive motor and clutch for rotating one of the support rollers, a control device for controlling the operation of the clutch, a lamp and lens mechanism for forming an electrostatic latent image on the surface of a unit length portion of the endless image carrier, a device for developing the electrostatic latent image on the surface of the endless image carrier so as to change it into a toner image, a device for transferring the toner image onto the surface of a transfer paper sheet, and a device for removing residual toner on the image carrier. The toner-removing device is disposed adjacent to the image-developing device.

Abstract: The alignment of data as required in an L-stage is carried out with a first aligner which is controlled by a wired logic for exclusive use, while the alignment of data as required in an E-stage is carried out with a second aligner which is controlled by a microinstruction. Regarding those among macroinstructions which need to fetch storage operands in only the L-stages, the alignment of the storage operand is carried out by means of the first aligner. On the other hand, in the execution of macroinstructions which need to fetch storage operands in both the L-stages and the E-stages, the storage operands fetched in the L- and E-stages are respectively aligned by means of the first and second aligners.

Abstract: A data shunting and recovering device is provided to shunt and hold the data stored in a register and its address before writing the register during a delay period following generation of an interrupt. This data is then restored into the register when an instruction of recovering is given. Therefore, it is allowed to achieve the moderating effects of delaying the stopping of the stage advance in data processing upon generation of an instruction for interruption without loss of data stored in the memory prior to writing during this delay period.

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: 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: A magnetic brush developing apparatus has a developing casing having a developer supply station and a developing station, a magnetic brush carrier member in the developing casing between the developer supply station and the developing station, and a magnet roller member rotatably mounted within the magnetic brush carrier member and driven in one direction for moving a developer in the form of a magnetic brush around the peripheral surface of the magnetic brush carrier member in a direction opposite the one direction from the developer supply station to the developing station.

Abstract: A data processing system using a store data buffer control device includes plural store data buffers and the data from a processor is temporarily stored in the store data buffers and then transferred to a memory. A shift register is used to trace the storing requests from the processor so that the storing requests re-executable in the instruction re-execution taking place at the time of a fault occurring are distinguished from the storing requests not re-executable in the same operation. The data held in the store data buffers corresponding to the re-executable requests is invalidated while the data held in the store data buffers corresponding to the non-re-executable requests is kept valid.

Abstract: Disclosed is a data processing system comprising means for storing a plurality of macroinstructions and data, means for determining a starting address of data participating in practice of a macroinstruction read out from the storing means and the entire length of said data in response to said read-out macroinstruction and reading out said data from said storing means based on the thus determined address and entire length, means for shifting the read-out data by a quantity determined by said macroinstruction and means for masking a part, determined by said macroinstruction, of said shifted data, wherein practice of macroinstructions is controlled by a microinstruction sequence, an align field is disposed for these microinstructions to control said read-out means, shifting means and masking means, said shifting means is arranged so that said shifting quantity is determined in response to said starting address and said align field, and means for putting out mask pattern signals indicating the position of data to

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: A photocopying machine equipped with a variable magnification arrangement including a cassette containing large-size copy paper and positioned to permit lengthways transport of copy paper through the machine and a cassette containing small-size copy paper and positioned to permit sideways transport of copy paper through the machine. The cassettes comprise actuation elements which actuate different combinations of switches in a control circuit, which in response causes adjustment of positions of photocopying machine elements for production of photocopies of different magnifications and causes selective forwarding of copy paper of the required size from a cassette.

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 method of removing foreign materials from developers characterized by intermittently supplying a magnetic developer to the peripheral surface of a nonmagnetic sleeve provided with a rotatable magnet roller in its interior, while recovering, at a position a specified distance away from the location of supply of the developer along the sleeve peripheral surface, the forward end portion of a layer of the developer moving along the sleeve peripheral surface in a direction opposite to the direction of rotation of the magnetic roller to thereby remove foreign materials from the magnetic developer.

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.

Abstract: A circuit outputs different subsidiary address data depending on operand address data contained within operand designation fields and operation codes of system instructions. A control storage, which stores microinstructions, is accessed for the initial microinstructions, contained within microinstruction sequences for system instructions, at storage locations specified by the operation codes and the subsidiary address data. As a result, different microinstruction sequences for system instructions with the same operation code can be initiated depending on the operand address data, without using any microinstructions for testing the operand address data.

Abstract: An electrophotographic copying apparatus which includes a thin sheet original transporting device having transporting rollers and disposed adjacent to a transparent platform for holding thick originals at the upper portion of the copying apparatus, and an image forming optical system moving device for moving the optical system from a scanning starting position for thick original copying to a stationary optical system position for thin sheet original copying in association with a change-over of operation from copying a thick original to copying a thin sheet original in order to eliminate disadvantages inherent in exposures in conventional copying apparatuses, and the distance between first and second reflecting mirrors of the optical system at the scanning starting position for copying thick originals is set to be less than that when the optical system is in the stationary position for reduction of the size of the copying apparatus.

Abstract: An electrophotographic copying apparatus which is equipped with an improved arrangement for removing jammed copy paper. The apparatus is provided with a photoreceptor and a developing device combined into one unit which can be withdrawn to provide sufficient space for removing jammed copy paper, and is also provided with copy paper transporting members, a corona charger, a transfer charger, a copy paper separating claw etc. which can be moved away from a transfer section in one operation for facilitating access to the jammed copy paper in an efficient manner in the case of copy paper jamming. The transfer charger is covered when it is moved away from the transfer section to protect it from possible damage.

Abstract: The heat and pressure rolls of a fusing apparatus for an electrophotographic copying machine are shifted into pressure contact with one another while a support sheet bearing a toner powder image passes therebetween, and are separated while the sheet is not therebetween. A driving mechanism drives both rolls when not in contact, while one of the rolls drives the other while in pressure contact. A shifting mechanism is actuated by a sheet detector for shifting the rolls into and out of contact.In another embodiment, the rolls are in light rolling contact, with no sheet passing therebetween, under the weight of one of the rolls idly mounted in place. A pressing mechanism presses the rolls into pressure contact, upon actuation by a sheet detector, while the sheet passes between the rolls.

Abstract: In an electrophotographic copying machine having a transparent support for support thereon the original to be copied, an illumination device for illuminating the original on the transparent support and a photoreceptor surface adapted to be driven past charging, exposure, developing, transfer and cleaning stations, a discharging device for extinguishing unnecessary electrostatic charge on the photoreceptor surface which is formed at an area between each two adjacent areas to be optically exposed to the incoming light, which discharging device has at least one light guide having one end situated adjacent an intercepting mechanism and the other end situated in the vicinity of the photoreceptor surface. The intercepting mechanism is brought into operation to intercept passage of discharging light towards the photoreceptor surface.

Abstract: Devices for controlling the heating of fuser roll apparatus are disclosed. In fuser roll apparatus a toner powder image is heated under pressure on a supporting sheet to be fixed thereon. The apparatus comprises a plurality of heaters for heating a fuser roll; and a plurality of surface temperature detecting elements for detecting the surface temperature of the fuser roll, the power to the respective heaters being independently controlled according to detecting signals from the respective surface temperature detecting elements.