Abstract: An image forming apparatus has a plurality of image bearing bodies in a predetermined sequence, an intermediate transfer medium for running in contact with each of the plurality of image bearing bodies, and a plurality of supporting rollers for driving the intermediate transfer medium. At least one image bearing body and at least one supporting roller are arranged such that a radius deviation of the image bearing body is in registration along a transfer medium with a radius deviation of the supporting roller.

Abstract: An image forming apparatus has a plurality of image bearing bodies in a predetermined sequence, an intermediate transfer medium for running in contact with each of the plurality of image bearing bodies, and a plurality of supporting rollers for driving the intermediate transfer medium. The rollers are manufactured such that a driven coupler is engaged with the roller body in a predetermined orientation with a location of a radius deviation along the circumference of the roller body.

Abstract: An image forming apparatus has a plurality of image bearing bodies in a predetermined sequence, an intermediate transfer medium for running in contact with each of the plurality of image bearing bodies, and a plurality of supporting rollers for driving the intermediate transfer medium. A distance between points of contact of at least two image bearing bodies on the intermediate transfer medium is a positive integer multiple of the length of circumference of one of the supporting rollers.

Abstract: A delivery unit and method for removing carrier vapor in a wet-type printer. The delivery unit includes a delivery guide, delivery rollers and a duct for collecting carrier vapor generated from a paper by the latent heat on the paper passing through the delivery guide in order to prevent the carrier vapor from leaking outside of the printer. The carrier vapor collection duct includes upper and lower housings connected to each other to form a predetermined space therein. The upper housing has a vent on one side thereof and an air inlet on the opposite side. A fan is mounted on the vent. The carrier vapor is collected in the duct of the delivery unit and then sent to the catalyst unit by the fan to be oxidized. Accordingly, the delivery unit can prevent the white carrier vapor generated from the paper passing through the delivery unit from leaking outside the printer.

Abstract: An oxidation catalyst device provided with a duct, a fan, a heater, an oxidation catalyst carrying element, and a heat-radiating duct. The duct is connected to a fixation device of the wet-type electrophotographic image forming apparatus. The fan, the heater and the oxidation catalyst carrying element are provided in the duct. The heat-radiating duct is installed to surround the duct and an airflow passage is formed between the outer wall of the duct and the inner wall of the heat-radiating duct.

Abstract: A liquid image developing system includes a development container to store a developer; a photosensitive body; a development roller partially soaked in the developer in the development container and to rotate opposite to the photosensitive body; a metering blade to scratch the developer attached to a circumference of the development roller to a predetermined thickness; a depositing plate spaced from the development roller to form a space therebetween; a supplying portion to supply the developer to the space between the development roller and the depositing plate; and a power supply to apply a voltage to the depositing plate so that the developer is transferred to the development roller from the space by an electric force. Accordingly, a high-concentration developer can be directly used in the development operation without a dilution operation, and thus the structure to supply the developer can be considerably simplified.

Abstract: A developer, for an electrophotographic image forming system, includes a developer container for storing developing solution, a developing roller which is partially soaked in the developing solution stored in the developer container and installed to rotate in an opposite direction of a photosensitive medium, a cleaning roller, which is soaked in the developing solution, is installed to rotate opposite to the developing roller and removes the developing solution remaining on the surface of the developing roller, and a developing solution agitator, which agitates the developing solution, and thereby keeps the developing solution in uniform concentration.

Abstract: A wet electrophotographic image forming machine that informs a user of a timing for replacing development cartridges. The image forming machine comprises a control section for sensing the condition of the developer stored in one or more developer housings on the basis of a measured electric current flowing between one or more developer feeding members and one or more developer application members via the developer provided therebetween, and a display section for externally displaying the developer condition according to a signal from the control section. The control section evaluates the magnitude of the electric current and provides a signal to the control section for display if there is a developer amount or concentration deficiency.

Abstract: A liquid developer imaging system and a method using the system for developing an image, including a cartridge for containing a developing solution; a developing container for receiving the developing solution supplied from the cartridge via a predetermined supply line; a developing roller partly submerged in the developing solution contained in the developing container, installed to be rotated facing a photosensitive object; and a metering blade for scraping off the developing solution coated on the surface of the developing roller to a predetermined thickness, is provided. According to the system, a developing supply structure can be considerably simplified because a high-density developing solution is directly used in developing an image without a process of diluting the solution, and an image can be developed to have high definition because the concentration of the developing solution coated on the developing roller is regularly controlled by a metering blade.

Abstract: A transfer unit of an electrophotographic image forming apparatus. The transfer unit includes a transfer belt which is rotated while contacting a photosensitive drum, a driving assembly having a driving roller supported by a plurality of main frames to rotate the transfer belt, and a steering roller portion supported by the plurality of main frames and which pushes the transfer belt to tighten the transfer belt. The apparatus further includes a transfer backup roller assembly having a plurality of transfer backup rollers which are installed inside the transfer belt to support a plurality of auxiliary frames and support the transfer belt, and a plurality of guide rollers supported by the plurality of auxiliary frames and to guide the transfer belt, and a transfer backup roller ascending and descending portion which ascends and descends the transfer backup roller assembly towards the driving assembly.

Abstract: In a laser printer using a plurality of laser scan units, a laser scan unit is capable of manually adjusting a plurality of laser beams to be parallel. The laser scan unit assembly includes a laser scan unit having a window on a front surface through which a laser beam is emitted, a hinge portion provided at one side of the laser scan unit to pivotably dispose the laser scan unit on the body, and an adjusting portion provided on the side of the laser scan unit opposite from the hinge portion, to adjust an amount the laser scan unit pivots. The body has a hinge supporting portion provided thereon to support rotation of the hinge portion. The hinge portion is formed as a hinge shaft and the hinge supporting portion is formed as a groove to support the hinge shaft. The adjusting portion includes a first adjusting unit which is an inclined surface, and a second adjusting unit which is a screw and is provided on the body.

Abstract: A developing system of a liquid electrophotographic image forming device. The developing system includes a development container in which a developer is stored, a development roller which rotates opposite to a photosensitive body, and being partially soaked in the development container, and a metering blade. The metering blade has a first face contacting the circumference of the development roller and a second face by which a predetermined angle is formed with respect to the first face, which maintains a developer layer on the circumference of the development roller at a predetermined thickness. By optimizing related parameters of the metering blade, the developer layer on the development roller can be regulated, thereby achieving good image quality.

Abstract: The present invention provides an ink delivery system and an ink delivery method of a liquid-type electrophotographic printer which are adapted to detect whether or not liquid in any one of containers which supply ink and a solvent to circulation tanks is exhausted without installing separate level sensors.

Abstract: An apparatus prevents developer wraparound in a wet electrophotographic printer using wraparound preventing units. Each of the wraparound preventing units has varied diameter parts formed at both ends of a developing roller, and matching parts formed at both ends of a metering roller to correspond to the varied diameter parts of the developing roller. Since the varied diameter parts and the matching parts are respectively installed at both ends of the developing roller and the metering roller, developer wraparound is not generated in the developing roller and a photosensitive roller during development.

Abstract: A photosensitive drum cleaning device of a wet type printer includes: a cleaning blade disposed on a photosensitive drum to contact and wipe an outer circumference of the rotating photosensitive drum, for removing a developer that has not been transferred to a transfer belt but remains on the photosensitive drum; and a developer drain holder for collecting and discharging the developer removed by the cleaning blade. The cleaning blade includes first and second guide wings which are respectively formed at opposite sides of a contact portion of the cleaning blade and the photosensitive drum and which have a predetermined height. The guide wings prevent the developer that is wiped by the cleaning blade from streaming down over the opposite sides of the cleaning blade. The guide wings are formed integrally with the cleaning blade to have a width that is thinner than the thickness of the cleaning blade.

Abstract: A developing system of a liquid electrophotographic image forming device. The developing system includes a developer container in which a developer is stored, a development roller which rotates opposite to a photosensitive body, and being partially soaked in the development container, and a metering blade. The metering blade has a first face contacting the circumference of the development roller and a second face by which a predetermined angle is formed with respect to the first face, which maintains a developer layer on the circumference of the development roller at a predetermined thickness. By optimizing related parameters of the metering blade, the developer layer on the development roller can be regulated, thereby achieving good image quality.

Abstract: A liquid image developing system includes a development container to store a developer; a photosensitive body; a development roller partially soaked in the developer in the development container and to rotate opposite to the photosensitive body; a metering blade to scratch the developer attached to a circumference of the development roller to a predetermined thickness; a depositing plate spaced from the development roller to form a space therebetween; a supplying portion to supply the developer to the space between the development roller and the depositing plate; and a power supply to apply a voltage to the depositing plate so that the developer is transferred to the development roller from the space by an electric force. Accordingly, a high-concentration developer can be directly used in the development operation without a dilution operation, and thus the structure to supply the developer can be considerably simplified.

Abstract: A developer, for an electrophotographic image forming system, includes a developer container for storing developing solution, a developing roller which is partially soaked in the developing solution stored in the developer container and installed to rotate in an opposite direction of a photosensitive medium, a cleaning roller, which is soaked in the developing solution, is installed to rotate opposite to the developing roller and removes the developing solution remaining on the surface of the developing roller, and a developing solution agitator, which agitates the developing solution, and thereby keeps the developing solution in uniform concentration.

Abstract: A liquid developer imaging system and a method using the system for developing an image, including a cartridge for containing a developing solution; a developing container for receiving the developing solution supplied from the cartridge via a predetermined supply line; a developing roller partly submerged in the developing solution contained in the developing container, installed to be rotated facing a photosensitive object; and a metering blade for scraping off the developing solution coated on the surface of the developing roller to a predetermined thickness, is provided. According to the system, a developing supply structure can be considerably simplified because a high-density developing solution is directly used in developing an image without a process of diluting the solution, and an image can be developed to have high definition because the concentration of the developing solution coated on the developing roller is regularly controlled by a metering blade.

Abstract: An ink delivery system and an ink delivery method are disclosed.