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 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 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:
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 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 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 apparatus for elevating a squeeze roller of a liquid developing apparatus, a sub-block having the squeeze roller selectively pressing a photoreceptor web installed thereon, is installed at a main block of the liquid developing apparatus to be capable of moving up and down. A mobile block is installed at the main block to be capable of moving up and down to support the sub-block. The mobile block is moved up and down by an elevating unit to allow the squeeze roller to contact or be separated from the photoreceptor web. A piezoelectric element is installed at the mobile block to support the sub-block and to move the sub-block up and down in a predetermined range by being reversibly transformed by electric current. A power supply selectively provides electric current to the piezoelectric element. Thus, the decline over time of the elastic force of the spring employed in the conventional elevating apparatus can be fundamentally solved. Further, when the liquid developing apparatus of the present invention is used for a long time, the pressing force of the squeeze roller to the photoreceptor web can be uniformly maintained.
Abstract:
A thermal-transcription printer has a printing head and a platen drum which is moved up and down to press thermally activated ink from a thermal transfer ribbon onto a paper. A lever member is installed on a feed roller for transferring a paper sheet, and the platen drum is supported by an end portion of the lever member. The platen drum moves up and down, while being supported by the lever member which rotates in the same direction as the feed roller, and presses an ink ribbon and the paper against the printing head.
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.