摘要:
In an image forming apparatus having a detachable process cartridge in which an image carrier on which an electrostatic latent image is formed, and a developing unit which develops the electrostatic latent image so that a toner image can be formed, both integrally formed into one unit. There is provided a developer container including a discharge section which can be inserted into a supply opening of the developing unit, and a container in which a predetermined amount of developer is contained, wherein the developer container is provided to the toner supply opening of the developing unit and the developer is supplied into the developing unit housing when a toner stirring screw of the developing unit is rotated.
摘要:
An image forming machine such as a copier and a printer for forming a color image on a recording sheet. The image forming machine includes: a photoreceptor for carrying the color image; an image writer such as a laser beam generator for forming a latent image of the color image on a surface of the photoreceptor; plural color developers for developing the latent image with color toners so that a developed color image is formed on the surface of the photoreceptor; a transferer for transferring the developed color image from the photoreceptor to the recording sheet; a cleaner for cleaning a residual portion of the developed color image on the photoreceptor; and a controller for controlling a cleaning operation of the cleaner which starts the cleaning operation after the transferring operation is completed. In the image forming machine, the plural color developers, the transferer, and the cleaner are located facing toward the surface of the photoreceptor, and a length of the surface between the transferer and the cleaner through the plural color developers is longer than a length of the color image. In addition, the image writer, the plurality of color developers, the transferer and the cleaning device are located in a specific order around the photoreceptor.
摘要:
In a color image forming machine including a belt-shaped photoreceptor stretched around a plurality of rollers, and a horizontal portion of the photoreceptor being disposed above and in parallel to face a plurality of developing devices, a charging device and a transfer device are disposed to face the photoreceptor at a common position where the photoreceptor is curved around one roller. A cleaning device is disposed to face the photoreceptor at a position where the photoreceptor is curved around the other roller. The charging device is used as a transfer device by changing supplied voltage or is interchangeable with the transfer device by being either slid or rotated between two positions. The photoreceptor, the developing devices and the cleaning device are integrally formed as a cartridge which is detachably mountable to the machine. The photoreceptor is rotated at least five times when a color image is formed by the processes of charging, exposing, transferring and cleaning, and is rotated at least twice when a monochromatic image is formed by the processes.
摘要:
A method for determining toner adhesion amounts of plural color toners on a photoreceptor. The method includes the steps of: (1) forming plural reference latent images, each of which is corresponding to a respective component color image of a reference toner image; (2) developing the reference latent images, each of which is developed with a respective color toner of the plural color toners, so that developed reference latent images are superimposed, each at a time, on the photoreceptor to form the reference toner image; (3) detecting the toner adhesion amounts of the plural color toners by detecting the reference toner image every time when one of the developed reference latent images is superimposed on the same portion of the photoreceptor; and (4) determining whether the toner adhesion amounts of the plural color toners are normal or abnormal according to results of the detecting step.
摘要:
A color image forming apparatus for forming a color image comprising; an image retainer for carrying the color image, a charger for charging a surface of the image retainer, a latent image former for forming a latent image on the charged surface of the image retainer, a multicolor developer for developing the latent image, a black developer for developing the latent image, a transfer sheet conveyer for conveying a transfer sheet and transferring the developed latent image onto the transfer sheet, and a cleaner for cleaning a residual developer on the surface of the image retainer, in which the image retainer, either one of the black developer or the multicolor developer, and the cleaning means are formed as a detachable processing cartridge, and the rest of the black developer or the multicolor developer is detachable to the body of the color image forming apparatus.
摘要:
The invention provides a method of forming a color image on a recording material by transferring a toner image formed on an image carrying means to the recording material and by fixing the toner image on the recording material. The method further includes adhering a transparent toner layer onto the recording material, and fixing the transparent toner layer together with the toner image on the recording material.
摘要:
In an image-forming system where a photosensitive belt is exposed to and scanned with a laser beam to form an image on the surface of the photosensitive belt, a standard pattern having laser beam-transmitting portions and non-transmitting portions arranged alternately in the direction of main scanning of the laser beam is formed on the photosensitive belt, and light-detecting means is disposed to detect the intensity of the laser beam transmitted through the transmitting portions. Dislocation of the focal point of the laser beam is detected based on the difference of the detected beam intensity between the transmitting portions and the non-transmitting portions, and based on the result of this detection, a collimator lens is moved in the direction of the optical axis to correct the dislocation of the focal point.
摘要:
An image forming apparatus which includes a recording sheet storage unit disposed within a main body and a feeder for feeding recording sheets from the recording sheet storage unit. Further included is a detector which emits a signal beginning an automatic loading of the recording sheet storage unit into the main body after manual placement of the storage unit at a predetermined position, and the unloading of the recording sheet storage device when such is desired. Further included is a second detector which detects the fully loaded position of the recording sheet storage device, as well as a conveyor for conveying the storage device to the fully loaded position when loaded, and removing the storage device therefrom during unloading.
摘要:
A color image forming apparatus in which at least one registration mark is formed on a movable image retainer, and exposed by an exposing device. A position of the registration mark is detected by a detecting device and a signal is generated based on the detected position of the registration mark. An exposing position of the exposing device is corrected by a correcting device in accordance with the signal to form a latent image on the image retainer.
摘要:
The invention provides a sheet feed cassette for holding various sizes of sheets to be fed to an image recording apparatus in a feed direction. The cassette comprises a first casing having a sheet placement area, and a second casing slidably connected to the first casing for expanding the area. The first casing is detachably mounted on the image recording apparatus.