摘要:
A fixing roller of an image forming apparatus includes a roller body having a pipe form. A coil assembly is mounted within the roller body and has an induction coil, and an inside and outside thereof are coated with insulators. A pressing pipe is mounted to the roller body to tightly bias the coil assembly toward an inner surface of the roller body. The pressing pipe has a cut away portion along a lengthwise direction to contract and expand in a circumferential direction.
摘要:
A fixing roller of an image forming apparatus includes a roller body having a pipe form. A coil assembly is mounted within the roller body and has an induction coil, and an inside and outside thereof are coated with insulators. A pressing pipe is mounted to the roller body to tightly bias the coil assembly toward an inner surface of the roller body. The pressing pipe has a cut away portion along a lengthwise direction to contract and expand in a circumferential direction.
摘要:
A fixing device includes a pressure member, a heat roller, a pressure roller disposed opposite to the heat roller and pressing the heat roller, and a fixing belt driven between the heat roller and the pressure roller. The pressure member is positioned upstream of the pressure roller in a direction that a printing medium is conveyed, presses the fixing belt along an outer circumferential surface of the heat roller, and fixes a toner image transferred to the printing medium.
摘要:
A method and apparatus for controlling a fusing temperature, and an image forming apparatus are provided. In the method of controlling a fusing temperature, power is supplied to a heat source included inside a heat roller at on/off chopping rates determined according to the temperature of the heat roller during a time period in which the temperature of the heat roller is rising, and power is supplied to the heat source at on/off chopping rates which are respectively increased by a predetermined value with respect to the determined on/off chopping rates during a time period in which the temperature of the heat roller is falling. Accordingly, a fusing property can be prevented from degrading in an initial printing process after a cold start occurs in a fusing unit, and thus a first print out time (FPOT) can be reduced.
摘要:
A fusing roller and a fusing device using the fusing roller. The fusing roller applies heat to a toner image and fuses the toner image onto a piece of paper and is heated by a coil connected to an external power source. The fusing roller includes a pair of end caps which are provided at opposite ends of the fusing roller, a connection electrode which is disposed in one of the end caps and connected to the external power source, and an adherence member which is coupled with the connection electrode, and having an end portion of the coil disposed between the adherence member and the connection electrode to ensure an electric connection between the coil and the connection electrode.
摘要:
A heat roller for a laser printer has a roller pipe, a resistive heat element accommodated in the roller pipe, an internal expanding pipe installed in the roller pipe which restricts the resistive heat element by pushing the resistive heat element toward the roller pipe, caps coupled to both end portions of the internal expanding pipe and provided with electrodes which supply a current to the resistive heat element, a gear coupled to any one of the caps, and a coupling unit which restricts at least one of the caps from slipping along the internal expanding pipe. The heat roller has the enhanced secure coupling between the internal expanding pipe, the roller pipe, the coil and the insulation layer. Accordingly, it is possible to prevent slip off and coil short circuit.
摘要:
A fixing unit and an image forming apparatus are provided. The fixing unit applies heat and pressure to a print medium on which a toner image is formed and fixes the toner image on the print medium. The fixing unit includes a heating roller including a heating source, at least two pressurizing rollers which are pressed against the heating roller along an outer circumferential surface of the heating roller, adhesion elastic bodies which elastically press the pressurizing rollers toward the heating roller at first locations of both ends of the pressurizing rollers, and correction elastic bodies which elastically press the pressurizing rollers at second locations of both ends of the pressurizing rollers in the opposite direction of the adhesion elastic bodies. With this structure, the fixing unit forms sufficient fixing nips to reliably fix toner images on the print medium while maintaining a compact structure. Furthermore, this structure increases the life span of the apparatus by minimizing deformation of the pressurizing roller.
摘要:
A fusing roller and a fusing device using the fusing roller. The fusing roller applies heat to a toner image and fuses the toner image onto a piece of paper and is heated by a coil connected to an external power source. The fusing roller includes a pair of end caps which are provided at opposite ends of the fusing roller, a connection electrode which is disposed in one of the end caps and connected to the external power source, and an adherence member which is coupled with the connection electrode, and having an end portion of the coil disposed between the adherence member and the connection electrode to ensure an electric connection between the coil and the connection electrode.
摘要:
A fixing unit, and an image forming apparatus having the fixing unit. The fixing unit includes a heat roller including a heat source therein, one or more pressing rollers in close contact with the heat roller, an elastic body to elastically apply pressure on both ends of the one or more pressing rollers with respect to the heat roller, a backup member to contact a central portion of the one or more pressing rollers and to apply pressure to the central portion in a longitudinal direction of the one or more pressing rollers, and a backup elastic body to elastically press the backup member towards the heat roller.
摘要:
A heat roller for a laser printer has a roller pipe, a resistive heat element accommodated in the roller pipe, an internal expanding pipe installed in the roller pipe which restricts the resistive heat element by pushing the resistive heat element toward the roller pipe, caps coupled to both end portions of the internal expanding pipe and provided with electrodes which supply a current to the resistive heat element, a gear coupled to any one of the caps, and a coupling unit which restricts at least one of the caps from slipping along the internal expanding pipe. The heat roller has the enhanced secure coupling between the internal expanding pipe, the roller pipe, the coil and the insulation layer. Accordingly, it is possible to prevent slip off and coil short circuit.