Abstract:
A squeegee roller cleaning apparatus of a liquid electrophotographic printer includes a squeegee roller and a cleaning roller. The squeegee roller is mounted to be operative for movement in order to selectively contact a photoreceptor web circulating along an endless path. The cleaning roller includes at least one blade member that is spirally twisted on the outer circumference of a rotary rod so as to contact the squeegee roller by the movement of the squeegee roller to remove a hold-up volume of developer. Thus, contamination of the photoreceptor web and the transfer roller can be reduced so that the quality of the printed image can be improved.
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 developer unit for a wet-type color image forming apparatus. The developer unit includes a developer bath filled with a liquid developing agent to a predetermined depth, and a developing roller that develops an electrostatic latent image formed on a photoreceptor to correspond to an original image by supplying the liquid developing agent while being partially immersed in the liquid developing agent. The developer unit further includes a cleaning roller that cleans the surface of the developing roller, a depositing roller that deposits the liquid developing agent onto the cleaned surface of the developing roller, and a metering roller that adjusts the thickness and concentration of the liquid developing agent deposited onto the surface of the developing roller by the depositing roller to suitable levels to develop the electrostatic latent image. The developer unit also includes a developer cartridge that supplies the liquid developing agent into the developer bath.
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 vacuum cleaner comprising a moisture cleaner device which is easily attached and removed. The moisture cleaner device comprises a frame providing the circulation track of the moisture cleaner; a working roller and a driven roller mounted sideways in the top and lower part of the said frame; a first coupling means for attachment and removal of the lower part of the moisture cleaner to the vacuum suction head section; a second coupling means for attachment and removal of the top part of the moisture cleaner to a connecting pipe; and a moisture cleaner mounted to the surface of the frame. Because the peripheral surface of the working roller is uneven, when the vacuum suction head portion is moved back and forth, the working roller and driven roller are rotated, the moisture cleaner thus being operative such that the moisture cleaner contacts the floor as the normal vacuum suction cleaning proceeds.
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 jam detecting apparatus for a wet type electrophotographic color printer capable of detecting various kinds of jams occurring at a transfer roller, including: a printed matter entrance sensor disposed on a front side of a transfer roll, for detecting an entrance of a printed matter into the transfer roll; a feed roll disposed by a shaft to be rotated in either direction on a transfer section printed matter guide disposed on a rear side of the transfer roll, the feed roll being passively rotated by the conveyed printed matter; a pressing roll assembly disposed on an upper portion of the feed roll, for pressing the printed matter in a manner that the feed roll is passively rotated by the conveyed printed matter; and feed roll rotational direction detecting section for detecting the presence of a jam by detecting the rotation and rotational direction of the feed roll. The feed roll rotational direction detecting section includes a rotational plate disposed on the shaft of the feed roll, and having a plurality of sensing holes; and a sensor disposed to receive the sensing holes of the rotational plate, for detecting the rotation and rotational direction of the rotational plate. Accordingly, all kinds of jams occurring at the transfer roll can be detected, precisely, and operation of the printer can be timely stopped. Since the kind of the jam is clearly indicated to a user, the user is enabled to prevent serious error in the related parts of the printer which is caused due to a wrap jam, and to remove the wrap-jammed printed matter easily.
Abstract:
An apparatus and a method of removing a photoreceptor belt from an electrophotographic printer are provided. The apparatus includes at least one pair of rollers for pressing and transferring the photoreceptor belt circulating in a predetermined traveling track, a cutting blade capable of cutting the photoreceptor belt while moving across the photoreceptor belt, a cylindrical member rotatably installed in a filter housing disposed near the photoreceptor belt, the filter housing having a filter cartridge for filtering foreign material of the inner air of the printer, and a driver for rotating the cylindrical member such that the photoreceptor belt is wound around the cylindrical member. The photoreceptor belt is cut and automatically drawn from the traveling track into the filter housing. The cut photoreceptor belt is removed together with the filter cartridge installed in the filter housing. The photoreceptor belt removing process can be easily and quickly performed, and it is also convenient to manage a replacement cycle of supplies for a printer.
Abstract:
A squeeze roller elevating apparatus of a liquid electrophotographic printer for selectively pressing a photoreceptor belt, which is installed at a belt frame for circulation, by elevating a squeeze roller. The apparatus includes a housing fixed at the belt frame, a squeeze frame installed in the housing and operative to elevatingly support the squeeze roller, a first elevating member installed at the squeeze frame for elevating movement, a second elevating member installed at the squeeze frame for elevating movement by being interlocked with the elevating movement of the first elevating member and moving the squeeze frame upward so that the squeeze roller presses the photoreceptor belt while ascending, a first spring coupling the first elevating member and the second elevating member to be interlocked with one another, a second spring coupling the second elevating member and the squeeze frame to be interlocked with one another, and an elevator which elevates the first elevating member. Thus, since the print mode, the "drip-line" mode, and the stand-by mode are performed as the squeeze roller installed at the squeeze frame is elevated, a reactionary force generated when the photoreceptor belt is pressed can be prevented from being transferred to the main frame.