Abstract: An exhaust system of a liquid electrophotography printer includes: an exhaust line to discharge air inside an engine cell to an outside thereof; at least one exhaust fan, which is installed inside the exhaust line to generate and move the air inside the engine cell; a heating coil to heat the air to be discharged through the exhaust line to ignite impurities contained in the air; and an oxidative catalyst filter to filter and deodorize the impurities. The heating coil may be installed inside the exhaust line and coated with platinum on the outer surface. The oxidative catalyst filter may be installed inside the exhaust line, and may be a metallic honeycomb carrier coated with a catalyst mixture, or a non-woven heating mat coated with a catalyst mixture. The heating coil and the oxidative catalyst filter are typically sequentially installed adjacent to each other.

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: A paper detecting device to detect paper presence on a paper plate in a paper feeding cassette, and comprising a light-emitting device and a light-receiving sensor. In the paper feeding cassette, an end-fence is movably mounted, and at least one of the light-emitting device and the light-receiving sensor is mounted on a base of the end-fence to be covered by the stacked paper. Accordingly, before developing a new image, the complete consumption of the paper supply can be detected, and therefore, the toner can be saved.

Abstract: A liquid electrophotographic image-forming apparatus is provided including an anti-wraparound device having a bushing formed on both ends of a rotary shaft of a transfer backup roller to slide thereon, a shielding member installed on the bushing and contacting the transfer belt and the cleaning blade to prevent developer removed by the cleaning blade from flowing to the sides of the transfer belt, and an elastic member installed on both sides of the transfer backup roller for elastically biasing the bushing toward the transfer belt. Therefore, a wraparound phenomenon generated on the sides of the cleaning blade and transfer belt can be prevented, thus obtaining a higher image quality.

Abstract: A paper detecting device to detect paper presence on a paper plate in a paper feeding cassette, and comprising a light-emitting device and a light-receiving sensor. In the paper feeding cassette, an end-fence is movably mounted, and at least one of the light-emitting device and the light-receiving sensor is mounted on a base of the end-fence to be covered by the stacked paper. Accordingly, before developing a new image, the complete consumption of the paper supply can be detected, and therefore, the toner can be saved.

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: In an electrostatic transfer type liquid electrophotographic printer, an applied pressure between each photosensitive drum and a first transfer roller corresponding to the photosensitive drum is reduced along a downstream of a traveling direction of a transfer belt to prevent the deterioration of a toner image generating due to the amount of a liquid carrier sequentially increased when toner image on the photosensitive drum for each color are transferred and overlapped onto the transfer belt.

Abstract: A developing unit using a high concentration ink includes a developing solution supply unit supplying the developing solution containing the high concentration ink, a developing roller, whose lower half is soaked in the developing solution of the developing solution supply unit, absorbing the developing solution by a surface tension, and a photosensitive drum contacting the developing roller, receiving the developing solution absorbed on a surface of the developing roller and developing a latent electrostatic image formed on a surface of the photosensitive drum. Accordingly, as much as about 100% of a binary ink development (BID) is achieved, thereby providing a high quality image.

Abstract: A liquid electrophotographic image-forming apparatus is provided including an anti-wraparound device having a bushing formed on both ends of a rotary shaft of a transfer backup roller to slide thereon, a shielding member installed on the bushing and contacting the transfer belt and the cleaning blade to prevent developer removed by the cleaning blade from flowing to the sides of the transfer belt, and an elastic member installed on both sides of the transfer backup roller for elastically biasing the bushing toward the transfer belt. Therefore, a wraparound phenomenon generated on the sides of the cleaning blade and transfer belt can be prevented, thus obtaining a higher image quality.

Abstract: An exhaust system of a liquid electrophotography printer includes: an exhaust line to discharge air inside an engine cell to an outside thereof; at least one exhaust fan, which is installed inside the exhaust line to generate and move the air inside the engine cell; a heating coil to heat the air to be discharged through the exhaust line to ignite impurities contained in the air; and an oxidative catalyst filter to filter and deodorize the impurities. The heating coil may be installed inside the exhaust line and coated with platinum on the outer surface. The oxidative catalyst filter may be installed inside the exhaust line, and may be a metallic honeycomb carrier coated with a catalyst mixture, or a non-woven heating mat coated with a catalyst mixture. The heating coil and the oxidative catalyst filter are typically sequentially installed adjacent to each other.

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 liquid image forming apparatus including a developing portion in which ink is maintained at a uniform level so that the developing roller is dipped at a predetermined level, an ink reservoir in which ink supplied to the developing portion is stored, and an ink supplying unit to supply ink stored in the ink reservoir to the developing portion. The developing portion and the ink reservoir are provided in one developing container, and the ink supplying unit which supplies ink to the developing portion from the ink reservoir is provided in the liquid image forming apparatus.

Abstract: A system for supplying a high density developing solution in an image forming apparatus includes ink cartridges each containing corresponding high density developing solutions having respective colors, a cartridge unit recognizing colors of the ink cartridges and supplying the high density developing solutions, developing devices developing an image using the high density developing solutions supplied by the cartridge unit, and connecting units respectively connecting the developing devices to the cartridge unit and transferring the high density developing solutions to the developing devices therethrough, wherein the high density developing solutions inside the ink cartridges are supplied directly to the developing devices through the cartridge unit and the connecting units, respectively. The image forming apparatus can be manufactured in a compact size at a low price.

Abstract: A wet type electrophotographic printer having a catalyst oxidation filter therein includes a discharge passage to discharge air inside of a printer body to the outside, a blower in the discharge passage to guide the air inside of the printer body, and a catalyst oxidation filter arranged in the discharge passage. The catalyst oxidation filter includes a matrix coated with an oxidation catalyst, to deodorize the air which is guided to the discharge passage as the air is passed therethrough.

Abstract: A liquid image developing system including a development container in which a developer having a charge is stored, a photosensitive body, and a development roller which is partially soaked in the developer in the development container and to rotate and form development nip. The system further includes a depositing portion to apply an electric potential to attach the developer to the surface of the development roller, a metering portion to regulate the developer attached to the surface of the development roller at a predetermined thickness at a front end of the development nip, and a cleaning portion to clean the surface of the development roller at a rear end of the development nip.

Abstract: A liquid image forming apparatus including a developing portion in which ink is maintained at a uniform level so that the developing roller is dipped at a predetermined level, an ink reservoir in which ink supplied to the developing portion is stored, and an ink supplying unit to supply ink stored in the ink reservoir to the developing portion. The developing portion and the ink reservoir are provided in one developing container, and the ink supplying unit which supplies ink to the developing portion from the ink reservoir is provided in the liquid image forming apparatus.

Abstract: A developing unit using a high concentration ink includes a developing solution supply unit supplying the developing solution containing the high concentration ink, a developing roller, whose lower half is soaked in the developing solution of the developing solution supply unit, absorbing the developing solution by a surface tension, and a photosensitive drum contacting the developing roller, receiving the developing solution absorbed on a surface of the developing roller and developing a latent electrostatic image formed on a surface of the photosensitive drum. Accordingly, as much as about 100% of a binary ink development (BID) is achieved, thereby providing a high quality image.

Abstract: In an electrostatic transfer type liquid electrophotographic printer, an applied pressure between each photosensitive drum and a first transfer roller corresponding to the photosensitive drum is reduced along a downstream of a traveling direction of a transfer belt to prevent the deterioration of a toner image generating due to the amount of a liquid carrier sequentially increased when toner image on the photosensitive drum for each color are transferred and overlapped onto the transfer belt.

Abstract: A liquid image developing system including a development container in which a developer having a charge is stored, a photosensitive body, and a development roller which is partially soaked in the developer in the development container and to rotate and form development nip. The system further includes a depositing portion to apply an electric potential to attach the developer to the surface of the development roller, a metering portion to regulate the developer attached to the surface of the development roller at a predetermined thickness at a front end of the development nip, and a cleaning portion to clean the surface of the development roller at a rear end of the development nip.

Abstract: An image forming system in an electrophotographic printer and a method for forming an image using the system. The image forming system includes a photosensitive medium on which an electrostatic latent image is formed, a developing unit for developing the electrostatic latent image with developing solution having a predetermined color, a transfer medium onto which the developed image is transferred, an image charging unit for charging the image transferred onto the transfer medium, and a transferring unit for transferring the charged image onto a paper. In the above configuration, an electric force required for the transferring step is enhanced by the image charging unit before the image on the transfer medium is transferred onto the paper, and thereby the efficiency of transferring the image onto the paper is improved more.