Samsung Electronics Co., Ltd.

Seong-soo Shin

Jae-myoung Choi

Un-ho Baik

Won-seok Lee

Un-ho Paik

Hyun-goo Woo

A drying unit and method of drying for a liquid electrophotographic printing apparatus, the drying unit that is equipped in the printing apparatus comprising a developing unit that develops an image on an photosensitive medium using a liquid carrier as a mediator and a transfer unit that transcribes the developed image on a printing paper, so that the liquid carrier remaining on the photosensitive medium can be dried. The drying unit for the liquid electrophotographic printing apparatus is positioned near the photosensitive medium and includes a manifold having an inlet and an outlet; an inlet-outlet channel being between the inlet and the outlet and connecting them; a gas flowing unit by which the gas in the manifold is discharged through the outlet and gas flows in the manifold through the inlet; a condenser that condenses the evaporated carrier discharged through the outlet; and a heater that heats the gases flowing in the manifold through the inlet. Also, the liquid carrier drying method includes determining the injection condition; heating injection air according to the determined gas injection condition and evaporating the carrier on the photosensitive medium by injecting the heated gas at a predetermined speed in the manifold; discharging out of the manifold the carrier evaporated from the photosensitive medium and the air flowing in; and condensing the evaporated carrier at the manifold, of reheating the gas that is not condensed, injecting the gas at a predetermined speed into the manifold.

Drying unit for liquid electrophotographic printing apparatus and liquid carrier drying method using the same

A claw apparatus for a liquid electrophotographic printer prevents a sheet of paper passing through a transfer roller and the fixation roller from adhering to and curling around the transfer roller due to a peel force. In the claw apparatus, a guide portion guides the paper passing between the transfer roller and the fixation roller. A curved portion encompasses a portion of an outer circumferential surface of the transfer roller. An injection portion, formed at the curved portion, injects air through a gap formed between the curved portion and the transfer roller so that the paper passing between the transfer roller and the fixation roller can be guided toward the guide portion.

Claw apparatus for liquid electrophotographic printer

A squeegee roller cleaning apparatus for a liquid electrophotographic printer includes a plate installed at a tray, parallel to the axial direction of a squeegee roller, under a photoreceptor web to be capable of pivoting. A surface-contact blade member is supported at the plate so as to selectively surface-contact the outer circumferential surface of the squeegee roller. An elastic spring is coupled between the tray and the plate. A device makes the plate pivot such that the surface-contact blade member can contact or be separated from the outer circumferential surface of the squeegee roller.

Squeegee roller cleaning apparatus for liquid electrophotographic printer

A carrier recovery apparatus of a liquid electrophotographic printer includes a drying roller rotating in contact with a photoreceptor belt, for absorbing a liquid carrier from the photoreceptor belt, a heating roller for heating the drying roller, in contact therewith, and evaporating the absorbed liquid carrier, a manifold surrounding the drying roller and the heating roller, for accommodating the evaporated gas carrier, a sealing blade disposed in a gap between the drying roller and the manifold, a condenser for receiving the gas carrier from the manifold and condensing the same, a supply line for supplying the gas carrier in the manifold to the condenser, and a return line for supplying again residual gas carrier which is not condensed in the condenser to the manifold, wherein the gas carrier is condensed while circulating in a closed loop formed by the manifold, the supply line, the condenser and the return line.

Carrier recovery apparatus of liquid electrophotographic printer

A carrier recovery apparatus of a liquid electrophotographic printer including a dry roller which contacts a photoreceptor belt, for absorbing a liquid carrier therefrom, a heating roller for heating the dry roller and evaporating the carrier, a manifold for hermetically sealing and surrounding the dry roller and the heating roller so as to accommodate the evaporated gas carrier, a circulation line for connecting an outlet and an inlet formed in the manifold to form a closed loop, along which the gas carrier accommodated in the manifold circulates, a driving fan for supplying a driving force which allows the gas carrier to circulate, and a condensing means installed in the circulation line, for cooling and condensing the circulating gas carrier and transmitting the condensed carrier to a cartridge.

A paper pressing force controller of a printer includes a pressing roller that contacts a transfer roller for receiving a paper sheet therebetween. Guide rollers supply the paper sheet between the transfer roller and the pressing roller and a pressure sensing unit senses the pressure variations according to the thickness variations of the paper sheet supplied between the guide rollers. A pressure changing unit controls a pressing force of the pressing roller against the paper sheet by moving the pressing roller vertically with respect to the transfer roller.

Paper pressing force controller for a printer

A condenser for a carrier recovery apparatus of a liquid imaging system is provided. The condenser for a carrier gas recovery apparatus of a liquid imaging system for recovering a carrier gas as a liquid carrier by collecting and condensing the carrier gas evaporated by a drying unit of the imaging system, includes a bubble generating member provided at a vapor discharging end of a gas duct for inducing the collected carrier gas into the liquid carrier contained in the condenser. The bubble generating member generates bubbles from the carrier gas in the liquid carrier and a rotation member installed in front of the bubble generating member rotates to make the bubbles generated by the bubble generating member into finer bubbles. A rotation driving device rotates the rotation member. Therefore, since the carrier vapor is turned into fine bubbles, the contact area of the bubbles with the liquid carrier increases and condensation is sufficiently performed, thereby improving the recovery efficiency of the carrier vapor.

Condenser for carrier recovery apparatus of liquid imaging system

A liquid carrier withdrawal apparatus for a liquid electrophotographic imaging system for withdrawing a liquid carrier by separating the liquid carrier from a developer liquid embedded on a photoreceptor for a liquid electrophotographic imaging system. The liquid carrier withdrawal apparatus for a liquid electrophotographic imaging system using a mixed liquid of a toner and a liquid carrier as a developer liquid for developing a latent image formed on a photoreceptor, includes a core rotatably incorporated in the liquid electrophotographic imaging system to be supported thereto and having a cavity formed in its body and a plurality of through holes penetrating from the outer surface of its body to the cavity, an absorbing member coated on the outer surface of the core in contact with the photoreceptor, for absorbing the liquid carrier contained in the developer liquid embedded on the photoreceptor, and liquid carrier exhausting device for introducing the liquid carrier absorbed into the absorbing member into the cavity through the plurality of through holes of the core and exhausting the liquid carrier absorbed into the cavity to the outside of the core. Therefore, the system configuration for withdrawing the liquid carrier becomes simplified and the liquid carrier absorbing power by the absorbing member can be improved.

Liquid carrier withdrawal apparatus for liquid electrophotographic

A carrier recovery apparatus of a liquid electrophotographic printer includes a condenser for condensing a gas carrier recovered from a photoreceptor belt, a filtering tube having a cavity, whose first end is connected to the condenser, and whose second end has a plurality of throughholes leading to the cavity radially formed thereat, a filter bonded on the outer surface of the filtering tube and which filters the gas carrier contained in air passing through the throughholes, and an exhaust tube having an internal diameter larger than the outer diameter of the filtering tube, and whose first end is tightly fitted to the second end of the filtering tube to which the filter is coupled, for exhausting the air to the outside.

Growing community of inventors

Yongin, South Korea

Seong-soo Shin