Abstract: A recording medium transport mechanism including: a transporting device provided in a transport-path of medium, that transports the recording medium by a drive-roller and a facing-roller disposed to face the drive-roller; an urging member that urges the facing-roller toward the drive-roller; and a restricting portion that allows movement of the facing-roller away from the drive-roller against urging force of the urging member when the recording medium having thickness smaller than a predetermined thickness is transported in a region the drive-roller and the facing-roller facing each other, and restricts an allowable amount of movement of the facing-roller away from the drive-roller when the recording medium having thickness not smaller than the predetermined thickness is transported in the region compared to an allowable amount of movement of the facing-roller away from the drive-roller when the recording medium having thickness smaller than the predetermined thickness is transported is provided.

Abstract: A fixing device comprises a heating roll; an endless belt; and a pressurizing member that forms a pressure contact portion for pushing the endless belt against an outer peripheral surface part of the heating roll from an inner peripheral surface side of the pressurizing member so that a recording medium holding an unfixed image passes between the pressure contact portion and the heating roll, wherein the pressurizing member includes: a hard pressurizing member and a soft pressurizing member the hard pressurizing member, and the soft pressurizing member are disposed in a state in which a clearance is present between the hard pressurizing member and the soft pressurizing member in a specific region part so that at least a specific recording medium passes in a fixing region of the pressure contact portion in the rotating axis direction of the heating roll.

Abstract: A discharge mechanism includes: a rotating shaft that is rotatable; a plurality of roll portions provided around the rotating shaft; an opposing member provided above the roll portions so as to oppose the roll portions, the opposing member holding and conveying a material to be conveyed, in cooperation with the roll portions so that the material to be conveyed is discharged onto a discharge section; and a protrusion formed on an outer periphery of the rotating shaft, the protrusion not protruding beyond the outer diameter of the roll portions.

Abstract: An image forming apparatus including a thermostat arranged in a housing of a fixing device with terminals on both ends arranged slanted with respect to a longitudinal direction. A non-contact type temperature sensor is arranged adjacent to the thermostat. Discharge rollers are arranged at equidistance from a center reference line according to a smallest width of paper on a downstream side in a conveying direction of the paper of a housing. A center part of the thermostat and an opening for temperature detection of the temperature sensor are positioned between the discharge rollers.

Abstract: Disclosed is a sheet discharging apparatus in which an apparatus main body portion is provided with plural discharging rollers for discharging sheets by rotation, and a shaft coaxially fixed to the discharging rollers. The shaft has an outer diameter smaller than an outer diameter of the discharging roller. At the discharging roller side of the shaft is provided a small-diameter portion, with the outer diameter of the small-diameter portion smaller than the outer diameter of another portion. A projection projects from a portion of the apparatus main body portion, a tip end of the projection being disposed in a step between the small-diameter portion and the other portion of the shaft. Also disclosed is an image forming apparatus having the sheet discharging apparatus, in which an image is formed on a sheet, and the sheet on which the image is formed is discharged by the sheet discharging apparatus.

Abstract: In the image forming apparatus, a thermostat is arranged in a housing of the fixing device, and the terminals on both ends are arranged slanted with respect to the longitudinal direction. A non-contact type temperature sensor is arranged adjacent to the thermostat. The discharge rollers are arranged at equidistance from the center reference line according to the smallest width of the paper on the downstream side in the conveying direction of the paper of the housing. A center part of the thermostat and the opening for temperature detection of the temperature sensor are positioned between the discharge rollers.

Abstract: Disclosed is a sheet discharging apparatus in which an apparatus main body portion is provided with plural discharging rollers for discharging sheets by rotation, and a shaft coaxially fixed to the discharging rollers. The shaft has an outer diameter smaller than an outer diameter of the discharging roller. At the discharging roller side of the shaft is provided a small-diameter portion, with the outer diameter of the small-diameter portion smaller than the outer diameter of another portion. A projection projects from a portion of the apparatus main body portion, a tip end of the projection being disposed in a step between the small-diameter portion and the other portion of the shaft. Also disclosed is an image forming apparatus having the sheet discharging apparatus, in which an image is formed on a sheet, and the sheet on which the image is formed is discharged by the sheet discharging apparatus.

Abstract: The part of a halogen heater 90 corresponding to the position of a temperature sensing member 110 is positioned at a part where the temperature gradient of light distribution ripple 120 along the length direction of the halogen heater 90 is moderate (a top 122 or a bottom 124).

Abstract: The part of a halogen heater 90 corresponding to the position of a temperature sensing member 110 is positioned at a part where the temperature gradient of light distribution ripple 120 along the length direction of the halogen heater 90 is moderate (a top 122 or a bottom 124).