Abstract: A hyaluronic acid-lipid derivative, lipid nanoparticles comprising the same, and uses thereof are disclosed. The lipid nanoparticles comprising the hyaluronic acid-lipid derivative can be utilized as a vaccine or a drug delivery carrier for effectively carrying mRNA, proteins and other drugs, and stably delivering same into the body, and such a vaccine or drug delivery carrier has excellent mucoadhesive properties and mucosal permeability and thus has the advantage of enabling vaccine or drug delivery via the nasal cavity and lungs.

Abstract: An image forming apparatus as provided includes: a heating roller heated using a first heater unit disposed in the center thereof and second heater units disposed on both sides of the first heater unit; a pressure roller in pressing contact with the heating roller to form a nip; first and second sensors for detecting the temperature of a central area of the heating roller the temperature of a side area of the heating roller, respectively; and a controller for individually controlling the first and second heater units according to the respective temperatures measured by the first and second sensors when the temperature measured by the second sensor is lower than a predetermined first temperature, and commonly controlling the first and second heater units according to the temperature measured by the first sensor when the temperature measured by the second sensor is equal to or higher than the predetermined first temperature.

Abstract: An image forming apparatus as provided includes: a heating roller heated using a first heater unit disposed in the center thereof and second heater units disposed on both sides of the first heater unit; a pressure roller in pressing contact with the heating roller to form a nip; first and second sensors for detecting the temperature of a central area of the heating roller the temperature of a side area of the heating roller, respectively; and a controller for individually controlling the first and second heater units according to the respective temperatures measured by the first and second sensors when the temperature measured by the second sensor is lower than a predetermined first temperature, and commonly controlling the first and second heater units according to the temperature measured by the first sensor when the temperature measured by the second sensor is equal to or higher than the predetermined first temperature.

Abstract: A fusing device with improved fusing performance to obtain superior gloss and gloss uniformity. The fusing device includes at least one heat source to generate heat, a fusing belt disposed near the heat source, a rotation unit contacting an outer circumference of the fusing belt, at least one pressurization unit pressed toward the rotation unit such that a fusing nip is formed between the fusing belt and the rotation unit, a heat conductor contacting an inner surface of the fusing belt to conduct heat to the fusing nip, and an intermediate unit disposed between the pressurization unit and the heat conductor to prevent transmission of heat from the heat conductor to the pressurization unit.

Abstract: A fusing device to reduce lubricant leakage, includes a fusing belt having a heat source placed therein, a pressure roller placed to apply pressure to an outer surface of the fusing belt, and a nip plate to support an inner surface of the fusing belt so as to define a fusing nip between the fusing belt and the pressure roller. The nip plate includes a stepped portion spaced apart from the inner surface of the fusing belt so as to define a space for accommodation of a lubricant applied to the inner surface of the fusing belt. The fusing device may further include a side frame to rotatably support a longitudinal end of the fusing belt. The side frame may be provided with a lubricant guide to guide the lubricant on the longitudinal end of the fusing belt toward the center of the fusing belt.

Abstract: A fusing unit and an image forming apparatus, the fusing unit includes: a fusing frame which is grounded to the image forming apparatus when mounted in the image forming apparatus; a heating member which includes a release layer contacting the print medium and a heat transfer layer provided within the release layer, grounded to the fusing frame, and transfers heat from a heat source provided therein to a print medium passing a predetermined fusing nip; a supporting member which rotatably supports the heating member; a pressure roller, forms the fusing nip between the pressure roller and the heating member, presses the print medium passing the fusing nip and includes a conductive material; and a discharging member includes an end part which contacts the print medium passing the fusing nip, and discharges static electricity from the print medium.

Abstract: A fusing device with improved fusing performance to obtain superior gloss and gloss uniformity. The fusing device includes at least one heat source to generate heat, a fusing belt disposed near the heat source, a rotation unit contacting an outer circumference of the fusing belt, at least one pressurization unit pressed toward the rotation unit such that a fusing nip is formed between the fusing belt and the rotation unit, a heat conductor contacting an inner surface of the fusing belt to conduct heat to the fusing nip, and an intermediate unit disposed between the pressurization unit and the heat conductor to prevent transmission of heat from the heat conductor to the pressurization unit.

Abstract: An image forming apparatus including a fusing belt, a pressure roller disposed to face the fusing belt so as to press a recording medium onto the fusing belt, a nip forming member to support an inner surface of the fusing belt so as to form a fusing nip along with the pressure roller, and a heat source disposed inside the fusing belt to simultaneously apply radiant heat to the fusing belt and the nip forming member. The nip forming member includes a hill portion, which is located to one side thereof farther downstream in a movement direction of the recording medium and protrudes toward the hill portion. The hill portion causes the recording medium, which has curled in a given direction, to be bent in an opposite direction immediately prior to exiting from between the nip forming member and the pressure roller, thereby reducing curling of the recording medium.

Abstract: A fusing device to reduce lubricant leakage, includes a fusing belt having a heat source placed therein, a pressure roller placed to apply pressure to an outer surface of the fusing belt, and a nip plate to support an inner surface of the fusing belt so as to define a fusing nip between the fusing belt and the pressure roller. The nip plate includes a stepped portion spaced apart from the inner surface of the fusing belt so as to define a space for accommodation of a lubricant applied to the inner surface of the fusing belt. The fusing device may further include a side frame to rotatably support a longitudinal end of the fusing belt. The side frame may be provided with a lubricant guide to guide the lubricant on the longitudinal end of the fusing belt toward the center of the fusing belt.

Abstract: An image forming apparatus including a fusing belt, a pressure roller disposed to face the fusing belt so as to press a recording medium onto the fusing belt, a nip forming member to support an inner surface of the fusing belt so as to form a fusing nip along with the pressure roller, and a heat source disposed inside the fusing belt to simultaneously apply radiant heat to the fusing belt and the nip forming member. The nip forming member includes a hill portion, which is located to one side thereof farther downstream in a movement direction of the recording medium and protrudes toward the hill portion. The hill portion causes the recording medium, which has curled in a given direction, to be bent in an opposite direction immediately prior to exiting from between the nip forming member and the pressure roller, thereby reducing curling of the recording medium.

Abstract: A fusing unit and an image forming apparatus, the fusing unit includes: a fusing frame which is grounded to the image forming apparatus when mounted in the image forming apparatus; a heating member which includes a release layer contacting the print medium and a heat transfer layer provided within the release layer, grounded to the fusing frame, and transfers heat from a heat source provided therein to a print medium passing a predetermined fusing nip; a supporting member which rotatably supports the heating member; a pressure roller, forms the fusing nip between the pressure roller and the heating member, presses the print medium passing the fusing nip and includes a conductive material; and a discharging member includes an end part which contacts the print medium passing the fusing nip, and discharges static electricity from the print medium.

Abstract: A fusing device includes a rotatable pressing roller, a fusing belt to rotate by a rotational force transmitted from the rotatable pressing roller, a nip forming member to contact an inner surface of the fusing belt to form a nip on a contact area between the rotatable pressing roller and the fusing belt, a heating member formed in approximately an internal central portion of the fusing belt to heat the nip forming member and the fusing belt, an inner support member formed within the fusing belt to press a nip part of the nip forming member toward the rotatable pressing roller, and an outer support member formed outside the fusing belt, and both ends of the outer support member being engaged with the inner support member to thereby reinforce the strength of the inner support member and form a path for radiation heat to disperse.

Abstract: A fusing device and an image forming apparatus having the same. The fusing device can include a fusing belt, a heat source disposed in an interior of the fusing belt, a supporting member to support at least a portion of an inner peripheral surface of the fusing belt, a press member mounted while opposing the fusing belt to form a fusing nip, and a nip forming part formed with an opening portion to enable heat emitted from the heat source to be transferred to the fusing belt at a position corresponding to the fusing nip. The nip forming part can have at least one gap maintaining part to prevent change of a gap of the opening portion. The nip forming part is provided at the supporting member or a nip forming member mounted between the heat source and the supporting member. Accordingly, a temperature of the fusing belt can rise quickly by directly heating the fusing belt, and deterioration of fusing performance due to deformation of the nip forming member can be prevented.

Abstract: A fusing device includes a rotatable pressing roller, a fusing belt to rotate by a rotational force transmitted from the rotatable pressing roller, a nip forming member to contact an inner surface of the fusing belt to form a nip on a contact area between the rotatable pressing roller and the fusing belt, a heating member formed in approximately an internal central portion of the fusing belt to heat the nip forming member and the fusing belt, an inner support member formed within the fusing belt to press a nip part of the nip forming member toward the rotatable pressing roller, and an outer support member formed outside the fusing belt, and both ends of the outer support member being engaged with the inner support member to thereby reinforce the strength of the inner support member and form a path for radiation heat to disperse.

Abstract: A fusing device includes a rotatable pressing roller, a fusing belt to rotate by a rotational force transmitted from the rotatable pressing roller, a nip forming member to contact an inner surface of the fusing belt to form a nip on a contact area between the rotatable pressing roller and the fusing belt, a heating member formed in approximately an internal central portion of the fusing belt to heat the nip forming member and the fusing belt, an inner support member formed within the fusing belt to press a nip part of the nip forming member toward the rotatable pressing roller, and an outer support member formed outside the fusing belt, and both ends of the outer support member being engaged with the inner support member to thereby reinforce the strength of the inner support member and form a path for radiation heat to disperse.

Abstract: A fusing apparatus includes a heating unit to generate heat to fuse an image onto a printing medium, a pressurizing roller that faces and contacts the heating unit having an endless fusing film that is rotated while facing and contacting the pressurizing roller and presses the printing medium toward the heating unit, a nip forming member including a main body formed inside the fusing film to surround a heat source and contacts a portion of the fusing film to the pressurizing roller to form a nip. The fusing apparatus further includes a supporting member to support the nip forming member.

Abstract: A fusing device includes a pressure unit, a belt unit to rotate in outer contact with the pressure unit, a nip forming unit to form a nip over a contact portion between the pressure unit and the belt unit, a heating unit to heat the nip forming unit and the belt unit, and a support unit to press and support the nip forming unit constantly and having a plurality of heat transmission portions defined in a parallelogrammic shape of an oblique direction with respect to a traveling direction of the belt unit.

Abstract: A fusing device includes a pressure unit, a belt unit to rotate in outer contact with the pressure unit, a nip forming unit to form a nip over a contact portion between the pressure unit and the belt unit, a heating unit to heat the nip forming unit and the belt unit, and a support unit to press and support the nip forming unit constantly and having a plurality of heat transmission portions defined in a parallelogrammic shape of an oblique direction with respect to a traveling direction of the belt unit.

Abstract: A fusing device includes a rotatable pressing roller, a fusing belt to rotate by a rotational force transmitted from the rotatable pressing roller, a nip forming member to contact an inner surface of the fusing belt to form a nip on a contact area between the rotatable pressing roller and the fusing belt, a heating member formed in approximately an internal central portion of the fusing belt to heat the nip forming member and the fusing belt, an inner support member formed within the fusing belt to press a nip part of the nip forming member toward the rotatable pressing roller, and an outer support member formed outside the fusing belt, and both ends of the outer support member being engaged with the inner support member to thereby reinforce the strength of the inner support member and form a path for radiation heat to disperse.

Abstract: A fusing device and an image forming apparatus having the same. The fusing device can include a fusing belt, a heat source disposed in an interior of the fusing belt, a supporting member to support at least a portion of an inner peripheral surface of the fusing belt, a press member mounted while opposing the fusing belt to form a fusing nip, and a nip forming part formed with an opening portion to enable heat emitted from the heat source to be transferred to the fusing belt at a position corresponding to the fusing nip. The nip forming part can have at least one gap maintaining part to prevent change of a gap of the opening portion. The nip forming part is provided at the supporting member or a nip forming member mounted between the heat source and the supporting member. Accordingly, a temperature of the fusing belt can rise quickly by directly heating the fusing belt, and deterioration of fusing performance due to deformation of the nip forming member can be prevented.