Abstract: A cleaning device for an image forming apparatus such as an electrophotographic copying machine wherein the cleaning device is usable for removing toner from a photosensitive member. The cleaning device is effective to provide a solution to the problem caused by the toner particles and other foreign matter gripped between the cleaning member and the photosensitive member. According to this invention, the problems are solved by controlling the manner of bringing the cleaning member into contact with the photosensitive member and/or the manner of bringing the same out of contact.

Abstract: An electrophotographic copier including a combined charging and transferring unit which is positioned adjacent the exposure station of the copier. The illuminating device for reflecting light off of the image to be copied is located after the exposure station to reduce the distance between the charging and exposing steps so that dark decay of the photoconductor is substantially eliminated.

Abstract: A copying machine which develops an electrostatic latent image corresponding to an original image into a toner image, transfers the toner image on the copying paper and fuses the toner image later on the copying paper by means of a heating and fusing device, detects types of copying papers to be transferred by the toner image and when the copying paper is large in size, a fixed standstill time is arranged between the scanning and exposing operation of an original and a restoring operation to a home position is made and a fusing operation is prevented without fail when a temperature of the heating and fusing device drops below a fusing temperature.

Abstract: An electrographic printer/copier includes a paper path which is easily accessed from the top of the machine and permits copies to be collated automatically. The machine includes a paper tray which adjusts to organize successive pages into related reports.

Abstract: A toner density detecting device has NESA glass, a bias voltage source, a resistor and/or a varistor or Zener diode, and a luminosity detecting circuit which detects the density of toner adhering to the NESA glass using a light source and a photodiode as a light receiving element. The resistor permits detection at a high voltage without causing breakdown while the provision of the varistor in parallel with the resistor permits the application of constant voltage to the NESA glass. In addition a toner supply device has a detector and a toner supply circuit which compares the detection signal from the detector with two reference signals included therein to supply either a constant amount of toner or supply the toner for a predetermined period of time.

Abstract: To reduce the material in a transformer core and winding assembly, the edges of the core winding legs are relieved so as to achieve improved conformity with the inside corners of the coils disposed thereabout. More intimate spacing of the coils relative to the legs is therefore accommodated with consequent material savings in both the core and the winding coils. Methods for relieving the leg edges by bevelling and notching are disclosed.

Abstract: A contactless electric control handle having a field coil for forming an electro-magnetic field, inductive pick-up coils angularly spaced apart around the axis of the field. The rod of the control handle constitutes the core of the field coil. The field coil and the pick-up coils have the shape of annular, concentric conductors, whereas ferrite is applied to the rod in order to employ high frequencies up to 1 MHz.

Abstract: A copying apparatus capable of automatically adjusting the image density by reading the average density of the original document and still allowing fine adjustment by the operator for covering minor fluctuation in the image density.

Abstract: A developing apparatus, including, a developer supply container, having an opening, for containing a non-magnetic developer and magnetic particles, an endlessly movable developer carrying member of a non-magnetic material for carrying a developer, which is movable between an inside of the developer supply container and an outside of the developer supply container through the opening, a magnetic particle confining member, spaced from outer surface of the developer carrying member with a gap, a magnet for generating a fixed magnetic field, having a magnetic pole disposed inside of the carrying member and upstream of the confining member with respect to movement of the developer carrying member, and a magnet, disposed outside of the carrying member in proximity with the confining member at an upstream side thereof with respect to movement of the developer carrying member.

Abstract: An optical assembly for forming an image of the original to be copied on a photosensitive member at a selected magnification, is detachably mounted in a copying apparatus. The optical assembly includes a number of small imaging elements which are arranged in a row or rows in the direction crossing the optical axes of the imaging elements. The copying apparatus is provided with a detector for detecting the imaging magnification of the optical assembly mounted in the copying apparatus. The optical assembly provided with a portion actable on the detector.

Abstract: This invention relates to a harmonically graded airgap reluctance-type rotating electric resolver. The magnetic permeance of the airgap is made to vary sinusoidally. Therefore, only the fundamental wave exists, free of higher harmonics. The invention has application in numerous fields, including commutation of brushless motors and to precisely position machinery tools relative to work pieces in numerically controlled machines.

Abstract: A toner handling apparatus for use in transfer-type electrophotographic copying machines, such as a toner collecting container for accommodating the toner collected from a photoconductive member by a cleaner, or an image forming unit which includes the photoconductive member and a copying element (developing device and/or cleaner) disposed around the photoconductive member and adapted to accommodate a developer therein and which is removably installable in its entirety in the main body of the copying machine, which is provided in its opening with a thermally expandable resin and a heater for expanding the resin. The resin, which is unexpanded, expands to a thickness several times to several tens of times as large as the original thickness when heated to the expanding temperature and becomes adhesive upon expansion.

Abstract: In a sorting machine designed for use with a copying machine capable of handling paper of various sizes, a vertical array of sorting bins includes an uppermost sorting bin with an expandable surface area. This allows the sorting machine to handle extraordinarily large paper without increasing the footprint of the sorting machine. The uppermost position ensures that when expanded, the expandable sorting bin will stand over the copying machine, which does not normally need great overhead clearance. The expandable sorting bin may be expandable by virtue of a hinged, sliding or detachable extension plate, and may be expanded automatically when the copying machine detects and signals the use of larger paper. Multiple expandable sorting bins may be used for sorting the extra-large paper. In addition, the sorting machine may have one normal-sized sorting bin in alignment with a main receiving tray of the copying machine so as to allow the main tray to accommodate extra-large paper.

Abstract: An automatic sheet feeder for feeding a sheet to a processing station to record the information on the sheet. Also, an image recording apparatus provided with such an automatic sheet feeder. The automatic sheet feeder includes a sheet stacking tray for supporting a stack of sheets, a feeder for feeding one by one the sheets out of the stack, a processing station for effecting a required processing to the surface of the sheet bearing the information to be recorded, which is being advanced by the feeder, and a conveyor for returning the sheet which has passed through the processing station to the stacking tray.

Abstract: In an electronic device, of the type having an electronic component carried on a substrate, a housing to enclose the component, and terminal leads attached to the substrate, the housing is attached to the substrate by means of crimped tabs formed on extensions of the terminal leads. The extensions are directly generally perpendicularly to the substrate, and they terminate in inwardly-bent tabs which engage the housing in slots provided in the top surface of the housing. The tabs are crimped downwardly into the slots to lock the housing onto the substrate. An O-ring may optionally be retained in the housing, whereby the crimping of the tabs compresses the O-ring against the substrate to provide a substantially hermetic seal.

Abstract: There is provided a polyphase assembly for controlling A.C. devices and capable of producing an electrical impedance of a substantial resistive component. The assembly has a plurality of windings, separate for each phase, wound on and along a single, axially directed core. The core is constituted by at least one ferromagnetic body. The air boundary to air boundary thickness of at least the portions of the core covered by the windings is greater than 1.6 mm.

Abstract: A development apparatus and method positions the development electrode (30), in a liquid development system, in a close, spaced apart relationship to a moving photosensitive surface (12). The development electrode (30) has plural supply conduits (76) and at least one drain conduit (84) for eliminating toner starvation during the development process. The development apparatus and method further employ a pressurized filter element (50) having a cell size larger than the particle size to be trapped for reducing the occurrence of voids on the output copy. The filter (50) is configured to provide, in its sealed housing, input (80) and output (82) manifolds.

Abstract: A cleaning device for a photosensitive drum a rotatable cylindrical device including a permanent magnet, for carrying toner wiped off the surface of the photosensitive drum, a scraper for making contact with the peripheral surface of the rotatable cylindrical device, and a rotary blade formed of a magnetic material. The rotary blade scrapes off the toner blocked by the scraper upon rotation of the rotary blade so as to force the toner to fall off for toner recovery.

Abstract: A microform reader-printer apparatus which includes a slide assembly having coupled thereto a view mirror moveable between a viewing and a non-viewing position, a print mirror moveable between a print and a non-print position, and a control system including a drive motor coupled to the slide assembly for causing the control system to selectively move the slide assembly into either a predetermined viewing or printing position, and when in the printing mode, the document page selected for reproduction is printed using an electrophotographic reproduction engine.

Abstract: An electrophotographic copying machine of the type in which the copying machine is separated into two sections including a photoreceptor, a developing device, a supporting device for rotatably supporting the developing device so that the developing device is rotated as automatically being separated from the photoreceptor according to the self-weight of the developing device when the copying machine is separated into the two sections. Either the developing device or the photoreceptor can be replaced without damaging the surface of the photoreceptor at all.