Abstract: An electrostatic latent image formed on an image carrier is developed and then transferred to a paper sheet. In a normal copy mode, the image transferred to the paper sheet is fixed at a relatively high pressure, and in a multiple super position mode, it is fixed at a relatively low pressure. Thereafter, the paper sheet is conveyed again to a step for trasferring another image.

Abstract: A stripper finger mechanism is provided for separating record sheets from the surface of a roll member. In a preferred embodiment, a plurality of flexible stripper fingers are arranged so that the finger ends are angled against a fuser roller surface to effect initial separation of a fused copy sheet. The fingers have generally centrally located raised edges to provide a gradually sloping rigid support which lifts the fused copy sheet following initial separation.

Abstract: A dual scanning mode copying machine capable of selectively operating under a primary scan mode, in which a document placed on a stationary document support is scanned by an optical system being moved below the document support, and under a secondary scan mode in which a document fed through a document feeder is moved relative to and above the optical system. The machine includes a detector for detecting the insertion of the document into the document feeder. When this detector detects the insertion of the document into the document feeder, the optical system is brought to a stationary position immediately below the document feeder and next to the document support.

Abstract: A device is described for developing a latent electrostatic image which is present on a surface, for example a photoconductor surface. The device has one or more regions of a first type having relatively large dimensions and one or more regions of a second type having relatively small dimensions, both dimensions being measured parallel to the direction of relative movement of the device with respect to the image surface.The regions described may be separately and independently supplied with electric potentials.A method is described for developing a latent electrostatic image with use of a device according to the invention whereby energizing of the first and second type regions is carried out in accordance with developer-density and/or contrast requirements.

Abstract: An image forming machine provided with an image bearing member having a photosensitive material on its surface, a developing device for developing a latent electrostatic image formed on the surface of the photosensitive material, a cleaning device for removing toner remaining on the surface of the photosensitive material, and toner feed means for feeding the toner recovered in the cleaning device to the developing device. According to one aspect, the machine is constructed such that the color of toner used in the developing device can be easily determined. According to a second aspect, the image bearing member, the developing device and the cleaning device are mounted on a detachable unit frame, and the unit frame is adapted to be mounted and detached by means of a simple structure. According to a third aspect, the machine is constructed such that the toner recovered in the cleaning device is mixed in a predetermined amount with fresh toner and then fed to a developing chamber in the developing device.

Abstract: A copy machine is provided wherein a document on a document table is exposed by an exposure lamp, a toner image is formed on a photosensitive drum by reflected light from the document, and the toner image is transferred and fixed on a copying paper sheet. Half of a document on the document table is copied on an upper surface of a copying paper sheet, and the other half thereof is copied on a lower surface of the sheet. In this case, when a check command is entered in a continuous copying operation mode, the copying operation is interrupted after one copied sheet is obtained and a copied state can be checked. When the copied state is good, the interruption is released by entering another check command so as to restart the copying operation.

Abstract: A copying machine utilizing a generally endless photoreceptor belt trained between reduced and large diameter rolls. At least one of the rolls is drivingly coupled with a drive unit and is driven at a low speed when and so long as the machine is in a standby condition to avoid localized heating of the photoreceptor belt.

Abstract: A reproducing machine in which an electrostatic latent image recorded on a photoconductive member is developed with a liquid developer material comprising at least a liquid carrier having pigmented particles dispersed therein. The developed image is transferred from the photoconductive member to a sheet of support material. The sheet of support material, with the developed image thereon, passes through a housing. In the housing, heat and pressure are applied to the sheet of support material to vaporize the liquid carrier and to fuse the pigmented particles to the sheet of support material in image configuration. An interior surface of the housing is cooled to liquefy the vaporized liquid carrier thereon.

Abstract: An apparatus for handling an original in a copy machine comprises: feed rollers and a flat face belt for feeding a sheet original; feed-out rollers for feeding out the original after the exposure; two sensors for sensing the front edge and rear edge of the original; clutches and a drive motor for driving the feed and feed-out rollers and belt; and a control unit or a microcomputer. The two sensors output detection signals indicative of the front and rear edges of the original to the microcomputer, which computes the feed-out timing of the original and the feed timing of an original to be fed next in response to those signals, thereby controlling the feed operation of the original in accordance with the size of the original. Thus, the total copy time can be minimized and the original jam can be also promptly detected irrespective of the size of the original.

Abstract: An image forming apparatus has a light source, and one or more liquid crystal units for forming a latent image on the photosensitive drum by controlling the passage of the light from the light source between the light source and the drum. The liquid crystal units have a plurality of shutter arrays arranged with a plurality of microshutters. The microshutter has a miniature region for controlling the passage of the light, and the regions are different at every microshutter for forming the individual shutter arrays.

Abstract: A contact brush charging device together with a method for charging an insulating layer are provided wherein the charging brush comprises a plurality of resiliently, flexible thin fibers having an electrical resistivity of from about 10.sup.2 ohms-cm to about 10.sup.6 ohms-cm and being substantially resistivity stable to changes in relative humidity and temperature. In a preferred embodiment the plurality of fibers are arranged in a uniform distribution of fibers along the length of the brush and comprise partially carbonized polyacrylonitrile fibers having an electrical resistivity from about 10.sup.3 ohms-cm to about 10.sup.5 ohms-cm and being substantially homogeneous in composition.

Abstract: A full waste toner container detector system which includes a waste toner container for storing waste toner collected from a photoreceptor surface, a flexible film member which projects into the container when the container is not filled up with waste toner and projects outwardly from the container due to the waste toner pressure when the container is full of waste toner, a reflection plate mounted on the external surface of the flexible member, a light source for irradiating the reflection plate, and a sensor provided in such a position as to receive light reflected by the reflection plate when the flexible member projects outwardly from the container.

Abstract: An image forming apparatus includes a detachable sub-assembly consisting of a latent image holder drum and cleaning means in a unitary assembly, whereby after the sub-assembly is removed from the image forming apparatus, the cleaning device and latent image holder drum can be individually separated from the sub-assembly. Also, a peel-off device is mounted on the sub-assembly for peeling recording paper away from the latent image holder drum.

Abstract: A system for reducing hydrocarbon emissions from a high speed liquid reprography process. Hydrocarbon ladened vapors from the reprography process are directed through an activated charcoal bed. The bed is regenerated from time to time by a flow of controlled temperature regenerating air. Whereas the reprography process generates hydrocarbons at a highly fluctuating rate and mixed in large volumes of air, the carbon bed regeneration produces hydrocarbons at a controlled rate in a small volume of air. These hydrocarbons are removed by removal means which may be either a catalytic reactor or a condensation device.

Abstract: A cleaning blade and process for use in an image forming apparatus wherein the blade removes residual developer from a photosensitive member. The cleaning blade can be in close contact with the photosensitive member. The blade extends substantially at right angles to the direction in which the photosensitive member moves. It has a lubricant layer formed on both end portions in the longitudinal direction of the blade, which forms part of a surface contacting the photosensitive member.

Abstract: An electric photographical copying system which provides a main charger for charging the photo-conductive layer of the recording medium, an optical exposure means for projecting an image of an original onto the photo-conductive layer to make an electrostatic latent image thereon, a developing device for developing the latent image with developer, a transfer device for transferring the image developed onto a copy sheet, a cleaning device for cleaning residual developer on the photo-conductive layer and an erasing device for erasing the surface potential of the photo-conductive layer. The devices are successively activated in an order to use the recording medium repeatedly.

Abstract: In a copier with a sorter with plural bins for collating the copier output copies, and an alternate copy output tray (which may be separated or comprise one bin of the sorter) and a document feeder for sequentially feeding one or more document sheets placed therein to the copier to be copied, and a copy count control for selecting one or more copies to be made by the copier and copy sheet output switching for switching the copy output to the sorter for collation or to the alternate copy output tray for stacking; an automatic document sheet sensing system provides signals indicative of whether or not more than one document sheet had been placed into the document feeder by sensing the feeding of one (the first) document sheet by the document feeder to be copied and the presence or absence of at least one additional document sheet in the document feeder, and a copier control responsive to either a signal indicative of only one document sheet or to the selecting of only one copy in the copy count control to autom

Abstract: A windowing system for use when using data to form video display images. The digital data is operated on by a transfer function delineated by predefined parameters or by newly generated parameters determined by the image being displayed.

Abstract: A multi-mode imaging system provides the capability of reproducing documents in a conventional COPY mode wherein a document is placed on a platen and scanned to create an exposed latent image on a photosensitive member. The system is adapted to operate in a second, print (WRITE) mode wherein an image bar, such as a light-emitting diode (LED) array or a liquid crystal shutter (LCS), is placed into optical alignment with a fixed optical system including a linear lens array. The image bar is electrically addressed to create a light output in an image-wise pattern (LCD) or to change the state of the LCS. The image output is optically coupled into the lens array which projects the image onto the photosensitive member. In one embodiment, the image bar is partially within the end portion of a movable plate.

Abstract: An image forming apparatus has an original feeder which is operable in a first mode in which a plurality of originals are fed to an exposure position one at a time and an exposure operation is carried out a preset number of times for each original and a second mode in which the plurality of originals are fed to the exposure position one at a time and one cycle of exposure operation is carried out for each original and the above operation is repeated by the preset number of times, a storage having a plurality of record sheet trays, and a control unit for controlling the storage such that the record sheets are distributed to the trays in the first mode and the record sheets are stored in one of the trays in the second mode.