Abstract: A sheet supply device that supplies a sheet from a roll, includes: a first roll support portion which rotatably supports the roll on one end side in a width direction of the roll; a second roll support portion which rotatably supports the roll on the other end side of the roll by opposing the first roll support portion; and a guide portion which extends in the width direction and movably supports the second roll support portion in the width direction; wherein below a first space in which the roll between the first roll support portion and the second roll support portion is installed, a second space into which a cart which transports the roll enters is formed.

Abstract: An image forming apparatus includes: a first rotatable member; a second rotatable member that presses against the first rotatable member in a pressed state and separates from the first rotatable member in a separated state; and a hardware processor that sets a target speed of the second rotatable member based on a change in speed of the second rotatable member between a first speed in the separated state and a second speed in the pressed state.

Abstract: An image forming apparatus includes: a first rotatable member; a second rotatable member that presses against the first rotatable member in a pressed state and separates from the first rotatable member in a separated state; and a hardware processor that sets a target speed of the second rotatable member based on a change in speed of the second rotatable member between a first speed in the separated state and a second speed in the pressed state.

Abstract: An image forming apparatus includes a photoconductor and a developing device. The developing device supplies a developer to the photoconductor and is attachable to and detachable from a main body of the image forming apparatus. The main body includes a vibration mechanism that vibrates the developing device.

Abstract: An image forming apparatus has an image forming section having a photoreceptor on which a toner image is formed, an endless belt that revolves with its outer surface facing the photoreceptor, a steering roller adapted to provide a tension to the belt and adjust the position of the belt in the width direction, a transfer roller that presses the belt toward the photoreceptor so as to form a transfer nip where the toner image is transferred, a transfer pressure adjusting mechanism adapted to adjust pressing force when the transfer roller presses the belt toward the photoreceptor, and a controller adapted to control the pressing force adjusted by the transfer pressure adjusting mechanism, according to the adjustment state of the steering roller.

Abstract: An image forming apparatus has an image forming section having a photoreceptor on which a toner image is formed, an endless belt that revolves with its outer surface facing the photoreceptor, a steering roller adapted to provide a tension to the belt and adjust the position of the belt in the width direction, a transfer roller that presses the belt toward the photoreceptor so as to form a transfer nip where the toner image is transferred, a transfer pressure adjusting mechanism adapted to adjust pressing force when the transfer roller presses the belt toward the photoreceptor, and a controller adapted to control the pressing force adjusted by the transfer pressure adjusting mechanism, according to the adjustment state of the steering roller.

Abstract: The image forming apparatus according to the present invention comprises a first guide plate 45 located along the transport direction of recording media, a second guide plate 46 that are provided facing the first guide plates along the transport direction, and air blower 47 and 48 in the transport paths 41 and 42 for transporting the recording media after fixing. The first guide plate 45 has a plurality of first vent holes 451 formed along a direction that crosses the transport direction of the recording medium. The second guide plate 46 has a plurality of the second vent holes 461 formed at staggering positions relative to the positions of the first vent holes 451. The air blower 47 and 48 blow air into the transport paths 41 and 42 or blow air out of the transport paths 41 and 42 via the first and second vent holes 451 and 461.

Abstract: An image forming apparatus includes: an image forming section which forms an image on a sheet; a conveyance section which conveys the sheet to the image forming section, having a registration roller, a plurality of loop forming rollers which cause the sheet to form a loop, provided upstream of the registration roller in a sheet conveyance direction and arranged in a direction perpendicular to the sheet conveyance direction, a skew detection sensor which detects a skew of the sheet, and a conveyance roller provided upstream of the loop forming roller; and a control section which controls a driving of the conveyance section. The control section controls independently each of the plurality of loop forming rollers based on the detected result of the skew detection sensor.

Abstract: In an image forming apparatus including an image forming section which forms an image on a sheet and a conveyance section which conveys the sheet to the image forming section, the conveyance section includes: a registration roller, a plurality of loop forming rollers which cause the sheet to form a loop, provided upstream of the registration roller in a sheet conveyance direction and arranged in a direction perpendicular to the sheet conveyance direction, a skew detection sensor which detects a skew of the sheet, and a conveyance roller provided upstream of the loop forming roller; and a control section which controls independently each of the plurality of loop forming rollers based on the detected result of the skew detection sensor. The conveyance roller is swung in the direction perpendicular to the sheet conveyance direction.

Abstract: A sheet storing device capable of storing a plurality of sheets, which feeds a sheet of the stored sheets, includes: a side regulating member which regulates a side portion of the stored sheets that is in parallel with a feeding direction of the sheets; and a side regulating member adjusting unit in which one end side of the side regulating member in the feeding direction serves as a fulcrum, and the other end side of the side regulating member in the feeding direction is capable of being rotated, and an angle of the side regulating member with respect to the feeding direction is capable of being adjusted.

Abstract: An image forming apparatus provided with a bent sheet feeding guide member in the transportation path for transporting the recording material with the inclination along the width direction of the guide surface configured by the bent sheet feeding guide member being variable, or provided with a pair of transporting rollers that transports a recording material in the transportation path for transporting a recording material with the inclination of the pair of transporting rollers along the axial direction being variable with respect to the transportation surface.

Abstract: In an image forming apparatus including an image forming section which forms an image on a sheet and a conveyance section which conveys the sheet to the image forming section, the conveyance section includes: a registration roller, a plurality of loop forming rollers which cause the sheet to form a loop, provided upstream of the registration roller in a sheet conveyance direction and arranged in a direction perpendicular to the sheet conveyance direction, a skew detection sensor which detects a skew of the sheet, and a conveyance roller provided upstream of the loop forming roller; and a control section which controls independently each of the plurality of loop forming rollers based on the detected result of the skew detection sensor. The conveyance roller is swung in the direction perpendicular to the sheet conveyance direction.

Abstract: An image forming apparatus includes: an image forming section which forms an image on a sheet; a conveyance section which conveys the sheet to the image forming section, having a registration roller, a plurality of loop forming rollers which cause the sheet to form a loop, provided upstream of the registration roller in a sheet conveyance direction and arranged in a direction perpendicular to the sheet conveyance direction, a skew detection sensor which detects a skew of the sheet, and a conveyance roller provided upstream of the loop forming roller; and a control section which controls a driving of the conveyance section. The control section controls independently each of the plurality of loop forming rollers based on the detected result of the skew detection sensor.

Abstract: A sheet storing device capable of storing a plurality of sheets, which feeds a sheet of the stored sheets, includes: a side regulating member which regulates a side portion of the stored sheets that is in parallel with a feeding direction of the sheets; and a side regulating member adjusting unit in which one end side of the side regulating member in the feeding direction serves as a fulcrum, and the other end side of the side regulating member in the feeding direction is capable of being rotated, and an angle of the side regulating member with respect to the feeding direction is capable of being adjusted.

Abstract: The present invention provides an image printing apparatus which comprises registration roller unit which convey an image recording sheet toward an image transfer position at which the toner image is transferred onto the image recording sheet, a sensor which is provided between the registration roller unit and the image transfer position to detect the image recording sheet, and a control unit which controls driving of the registration roller unit.

Abstract: An image forming apparatus provided with a bent sheet feeding guide member in the transportation path for transporting the recording material with the inclination along the width direction of the guide surface configured by the bent sheet feeding guide member being variable, or provided with a pair of transporting rollers that transports a recording material in the transportation path for transporting a recording material with the inclination of the pair of transporting rollers along the axial direction being variable with respect to the transportation surface.

Abstract: An image forming apparatus, including an image carrier, an image forming section for forming toner image on the image carrier, an image transfer device for transferring the toner images from the image carrier to a transfer material, and a registration member for conveying the transfer material to a position where the image transfer device transfers the toner image in synchronization with the image formation conducted by the image forming section, wherein the registration member includes a drive roller having a core and a rubber layer formed on the core, and a driven roller coming into contact with the drive roller, wherein the drive roller satisfies formula (1), d/D?57.6 L?1.2, and formula (2), d÷0.5, where D is diameter of the drive roller, d is thickness of the rubber layer, and L is conveyance distance from the registration member to the image transferring position.