Abstract: An image forming system including multiple photoconductors arranged in a line extending in a vertical direction and forming one body as one unit, and multiple development devices and multiple exposure devices arranged on one side of the line of the multiple photoconductors. An image is transferred to a recording medium on an other side of the line of the multiple photoconductors.

Abstract: A position controller for motors for increasing the position loop gain of a full-close control system without causing recurrence of vibration. The controller where a position signal representing the position of a movable table and outputted from straight-line motion position sensing means attached to a straight-line motion mechanism is used as a position feedback signal comprises differentiating means (2) for differentiating a straight-line motion position signal and outputting a straight-line motion speed signal, subtracting means (4) for calculating the difference between a speed command signal and the straight-line motion speed signal, integrating means (3) for integrating a difference signal outputted form the subtracting means, proportional gain means (1) for receiving the output signal from the integrating means, and adding means (19) for adding the output signal form the proportional gain means to the speed command signal and outputting a new speed command Vr.

Abstract: An image forming system including multiple photoconductors arranged in a line extending in a vertical direction and forming one body as one unit, and multiple development devices and multiple exposure devices arranged on one side of the line of the multiple photoconductors. An image is transferred to a recording medium on an other side of the line of the multiple photoconductors.

Abstract: A picture image forming apparatus comprising a photoreceptor belt driven by a drive device, a plurality of developing devices for forming toner picture images on the photoreceptor belt, an intermediate transfer device, to a surface of which toner picture images on the photoreceptor belt are overlappingly transferred plural times when a picture image is to be formed on a single page, and a transfer roller for pushing a sheet against the intermediate transfer device in order to transfer toner picture images to the sheet, and wherein the intermediate transfer device is an intermediate transfer belt contacted by the photoreceptor belt to be driven thereby, and the intermediate transfer belt is trained around a photoreceptor-side roller and a transfer-side roller for pushing the sheet against the transfer roller, and wherein a diameter d2 of the transfer-side roller is smaller than a diameter d1 of the photoreceptor-side roller.

Abstract: A fuel vapor treatment canister is described. The canister includes a casing having first and second end walls between which an inside space is formed. The first end wall has a first opening in communication with a fuel tank, and a second opening in communication with an air intake passage of an engine. The second end wall has a third opening in communication with the atmosphere. The inside space includes first and second chambers. The first chamber is located closer to the first end wall than the second chamber. A first fuel vapor adsorbing material is disposed in the first chamber. A second fuel vapor adsorbing material and a heat-accumulative material are disposed in the second chamber. The heat-accumulative material is larger in specific heat than the second fuel vapor adsorbing material.

Abstract: An image forming system having multiple photoconductors arranged in a line and forming one body as one unit, multiple development devices and multiple exposure devices arranged on one side of the line of the multiple photoconductors, an intermediate transfer device arranged on the other side of the line of the multiple photoconductors and a form cassette arranged below the line of the multiple photoconductors. The image forming system further includes a transfer device and a fusing device arranged at an opposite side of the intermediate transfer device with respect to the line of the multiple photoconductors.

Abstract: A method of determining the level of the effect of each system entity on the overall system performance, wherein the status of each entity at each one of discrete points of time is determined as the corresponding one of an active and an inactive status; the length of the active period in which each entity is situated without interruption in the active status is determined as an active time; and, on the basis of the relationship in magnitude between the system entities with respect to the determined active time, the level at which each entity affects the performance of the system is determined.

Abstract: An image forming system having multiple photoconductors arranged in a line and forming one body as one unit, multiple development devices and multiple exposure devices arranged on one side of the line of the multiple photoconductors, an intermediate transfer device arranged on the other side of the line of the multiple photoconductors and a form cassette arranged below the line of the multiple photoconductors. The image forming system further includes a transfer device and a fusing device arranged at an opposite side of the intermediate transfer device with respect to the line of the multiple photoconductors.

Abstract: A fixing device in an image formation apparatus has a heating roller and a backup roller. These rollers are each coated with single silicone rubber layers around the respective peripheries of their core bars. This silicone rubber has a volume resistance value of 1013 &OHgr;·cm or more. The heating roller is charged with electricity of the same polarity as the polarity of toner particles due to frictional electrification caused at the time of feeding of a recording medium. The heating and the backup roller are polarized reverse to the polarity of the recording medium. A quantity of charged electricity on the backup roller is made larger than that on the heating roller. This permits the image formation apparatus to prevent offset from occurring at the time of fixing a toner image onto the recording medium to cope with various types of recording media.

Abstract: In order to provide an image forming system characterized by compact configuration, high speed printing, high picture quality recording and excellent maintainability without image misregistration, an image forming system is provided, wherein multiple photoconductors are arranged along one of the surfaces of the intermediate transfer belt which is elongated in the longitudinal direction, and a fusing device is located on the other surface, with the photoconductors being integrated in one unit.

Abstract: An electrophotographic apparatus comprising: a housing; a photosensitive member electrified by an electrification device; an exposure device for forming an electrostatic latent image onto the photosensitive member; a developing device for forming a toner image onto the photosensitive member; an intermediate transfer body to which the toner image is to be transferred; a transfer device for transferring the toner image formed on the intermediate transfer body onto a paper; a fixing device for heating the toner image on the paper; device for ejecting the paper outside the housing; device for exhausting the heat derived from the fixing device outside the housing; a cover provided on an upper portion of the fixing device; and an airflow path extending in a longitudinal direction of the fixing device and being provided by the cover and the housing, wherein the heat exhausting device is provided in an end portion of the airflow path.

Abstract: A fuel vapor treatment canister for controllably storing and releasing fuel vapor from a fuel tank and the like of an automotive vehicle. The fuel vapor treatment canister comprising a casing having first and second end walls between which an inside space is formed. The first end wall has a first opening in communication with a fuel tank, and a second opening in communication with an air intake passage of an engine. The second end wall has a third opening in communication with the atmosphere. The inside space includes first and second chambers. The first chamber is located closer to the first end wall than the second chamber. A partition wall is disposed to divide the inside space into the first and second chambers. The partition wall structure has an air permeability and a heat insulating ability higher than that of metal. A first fuel vapor adsorbing material is disposed in the first chamber. A second fuel vapor adsorbing material and a heat-accumulative material are disposed in the second chamber.

Abstract: Registration controlling methods are provided for a color electrophotographic apparatus capable of forming an image without color registration errors and uneven color. This is accomplished by preventing a photosensitive medium from being undesirably moved in the direction perpendicular to the transportation direction caused by an electrostatic attractive force between the photosensitive medium and an intermediate transfer device, even if there is a twist between the fixed axis of the member supporting the photosensitive medium and the axis of the member supporting the intermediate transfer device. With these methods, a fur brush cleaner made of a conductive brush is detached from the intermediate transfer device during the time period after the start of driving the photosensitive medium and until the front edge of the photosensitive medium reaches the intermediate transfer device.

Abstract: A predetermined processing liquid is supplied by a liquid supplying unit to a sheet of transfer paper having a surface on which toner is stably attached. An adhesive state of the toner on the transfer paper sheet is changed to an unstable adhesive state. The processing liquid is constructed by water, aqueous solutions of a surfactant, a water-soluble polymer, etc. The transfer paper sheet including the processing liquid is fed to a toner separating unit. While the toner is heated and pressurized in the toner separating unit, the toner is attached to a separating roller having a surface on which the softened toner is easily attached. The toner separating unit then separates only the transfer paper sheet from the surface of the separating roller by a separating claw. The processing liquid is removed from the transfer paper sheet by heating the transfer paper sheet, etc. using a drying unit such that the transfer paper sheet can be reused for a copying machine, etc.

Abstract: An intermediate transcription drum is supported so as to be driven in contacting relationship with a photosensitive belt. The rotating speed of the photosensitive belt driving motor is controlled by a control unit such that one rotation cycle of the intermediate transcription drum becomes a given cycle. An adjustment of the speed control data for the photosensitive belt driving motor is performed in the interval between electrostatic latent image forming. Thereby, a speed difference between the photosensitive belt and the intermediate transcription drum does not occur, and a plurality of the toner images can be transferred and accurately superposed onto the outer surface of the intermediate transcription drum.

Abstract: The present invention relates to a desk-top type color electro-photographic apparatus which is easy in use, small in size and light in weight, wherein maintenance such as changing its photosensitive member can be performed by a user and color adjustment is performed with high accuracy of less than 100 .mu.m. Developing units for four colors are placed in a rank, a single endless-belt-shaped photosensitive member being placed below them to form an approximately oval shape, the photosensitive member being touched with a transfer member on its major axis side to transfer each color of images. In addition to this, the photosensitive member is employed a cartridge type for easiness of user's maintenance and constructed such that highly accurate positioning between the body of apparatus and the cartridge can be performed.

Abstract: The present invention provides an electrophotographic copying apparatus in which a copy sheet is attracted to and delivered by a transfer belt to perform a transfer operation, wherein a sag of the leading end of the copy sheet is removed to prevent the copy sheet from being attracted to a photoreceptor, venting method of preventing attraction of the copy sheet. Stacked copy sheets are individually separately supplied, with each of the copy sheets being electrostatically attracted to and delivered by the transfer belt. The copy sheet is held between the photoreceptor and the transfer belt and is in contact with them. The photoreceptor carries an electrostatic latent image corresponding to an image information and a toner electrostatically attracted to the electrostatic latent image. The toner image on the photoreceptor is transferred to the copy sheet.

Abstract: A method for xerographic printing, comprises the steps of, holding a part of a work sheet at a position other than a leading end of the work sheet, before the leading end contacts with a toner image forming surface on which a toner image is formed by an electrostatic, charge of toner, holding both surfaces of the leading end of the work sheet and applying a frictional force to at least one of the surfaces of the leading end so that a tension is applied to the work sheet between the held part and the leading end, before the leading end contacts with the toner image forming surface, and making the work sheet contact with the toner image forming surface, and transferring the toner image from the toner image forming surface to the surface of the work sheet by generating an electric field for attracting the charged toner to the surface of the work sheet.

Abstract: A copy sheet, to which a developed image has been transferred by a transfer device, continues to be attracted to a copy sheet carrying surface of an insulating film and delivered toward a fusing roller pair. A force in a direction for pressing the copy sheet toward the insulating film is exerted, by an attraction strengthening device, on the copy sheet which is passing the vicinity of a downstream end of the copy sheet carrying surface after the transfer operation. This force strengthens a force for retaining the copy sheet on the copy sheet carrying surface of the insulating film, so as to hinder a portion of the copy sheet from being bent upwardly to the side of a photoreceptor and separated from the insulating film. Thus, separation of the copy sheet from the insulating film can be prevented from extending as far as a transfer position.

Abstract: A predetermined processing liquid is supplied by a liquid supplying unit to a sheet of transfer paper having a surface on which toner is stably attached. An adhesive state of the toner on the transfer paper sheet is changed to an unstable adhesive state. The processing liquid is constructed by water, aqueous solutions of a surfactant, a water-soluble polymer, etc. The transfer paper sheet including the processing liquid is fed to a toner separating unit. While the toner is heated and pressurized in the toner separating unit, the toner is attached to a separating roller having a surface on which the softened toner is easily attached. The toner separating unit then separates only the transfer paper sheet from the surface of the separating roller by a separating claw. The processing liquid is removed from the transfer paper sheet by heating the transfer paper sheet, etc. using a drying unit such that the transfer paper sheet can be reused for a copying machine, etc.