Abstract: Disclosed are an oral fixation device for radiation therapy and an oral fixation method in treatment of a lip cancer. The oral fixation device for radiation therapy includes a first spacer including a first insert inserted between a first lip portion and a first gum portion, and a tooth support coupled to the first spacer at a side of the first spacer disposed inwardly of an oral cavity, wherein teeth or gums of a patient is supported on the tooth support, wherein a first spacer has a specific thickness to maintain a specific spacing between the first lip portion and the first gum portion, wherein the first lip portion includes a treatment target portion to be subjected to the radiation therapy.

Abstract: Disclosed are an oral fixation device for radiation therapy and an oral fixation method in treatment of a lip cancer. The oral fixation device for radiation therapy includes a first spacer including a first insert inserted between a first lip portion and a first gum portion, and a teeth support coupled to the first spacer at a side of the first spacer disposed inwardly of an oral cavity, wherein teeth or a gum of a patient is supported on the teeth support, wherein a first spacer has a specific thickness to maintain a specific spacing between the first lip portion and the first gum portion, wherein the first lip portion includes a treatment target portion to be subjected to the radiation therapy.

Abstract: Disclosed are a radiotherapy assistant apparatus for modulating a build-up region of a photon beam for a radiotherapy, a radiotherapy system including the radiotherapy assistant apparatus, and method for the radiotherapy system. The radiotherapy assistant apparatus for modulating a build-up region of a photon beam for a radiotherapy, including at least: a magnetic field generator that generates a magnetic field that has a direction perpendicular to a movement direction of the photon beam, the magnetic field generator is disposed on a movement route along which the photon beam moves toward a target portion of the radiotherapy; and a magnetic field intensity adjuster that adjusts an intensity of the magnetic field generated by the magnetic field generator. The magnetic field generator disperses secondary electrons that have particular energy levels equal to or lower than a preset value.

Abstract: Disclosed are an oral fixation device for radiation therapy and an oral fixation method in treatment of a lip cancer. The oral fixation device for radiation therapy includes a first spacer including a first insert inserted between a first lip portion and a first gum portion, and a teeth support coupled to the first spacer at a side of the first spacer disposed inwardly of an oral cavity, wherein teeth or a gum of a patient is supported on the teeth support, wherein a first spacer has a specific thickness to maintain a specific spacing between the first lip portion and the first gum portion, wherein the first lip portion includes a treatment target portion to be subjected to the radiation therapy.

Abstract: Disclosed are a radiotherapy assistant apparatus for modulating a build-up region of a photon beam for a radiotherapy, a radiotherapy system including the radiotherapy assistant apparatus, and method for the radiotherapy system. The radiotherapy assistant apparatus for modulating a build-up region of a photon beam for a radiotherapy, including at least: a magnetic field generator that generates a magnetic field that has a direction perpendicular to a movement direction of the photon beam, the magnetic field generator is disposed on a movement route along which the photon beam moves toward a target portion of the radiotherapy; and a magnetic field intensity adjuster that adjusts an intensity of the magnetic field generated by the magnetic field generator. The magnetic field generator disperses secondary electrons that have particular energy levels equal to or lower than a preset value.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: A vibration wave motor obtains a desired pressure using a piezoelectric device. The vibration wave motor includes a vibrator which is supported by a shaft and has electro-mechanical conversion elements for generating a travelling vibration wave progressing along the circumferential direction around the shaft when a first electrical signal is applied to the vibrator. A rotating unit which has a portion which is in press-contact with a surface of the vibrator, perpendicular to the shaft, rotates around the shaft by the travelling vibration wave generated in the vibrator. A piezoelectric pressure member maintains a desired press-contact between the vibrator and the actuator by a piezoelectric effect generated when a second electrical signal is applied to the piezoelectric pressure member. Thus, a constant pressure can be maintained by detecting the pressure via the piezoelectric pressure member during operation or stop of the vibration motor.