摘要:
A transfer device includes a plurality of rollers, a rotatable intermediate transfer belt wound around and stretched between the rollers, a transfer member disposed in the inner loop of the belt and facing an image bearing member of an image forming apparatus disposed at an outer circumference of the belt, to transfer an image formed onto the surface of the image bearing member when contacting the intermediate transfer belt, and a position adjuster to adjust the position of the intermediate transfer belt at different positions relative to the image bearing member. The positions include a contact state in which the intermediate transfer belt applied with a predetermined tension contacts the image bearing member, a first separation state in which the tensioned intermediate transfer belt separates from the image bearing member, and a second separation state in which the intermediate transfer belt separates further away from the image bearing member.
摘要:
An image foaming apparatus includes an image bearing member, a transfer unit, and a pressing mechanism. The image bearing member bears a toner image. The transfer unit is disposed opposite the image bearing member and is swingably and detachably held within a main body of the image forming apparatus. The transfer unit includes a transfer member and a power receiving electrode. The transfer member is disposed opposite the image bearing member, to contact the image bearing member to form a transfer nip therebetween and transfer the toner image on the image bearing member onto a recording medium in the transfer nip. The power receiving electrode receives power from the main body of the image forming apparatus. The pressing mechanism presses the transfer unit against the image bearing member and includes a power supply electrode that contacts the power receiving electrode of the transfer unit to supply power thereto.
摘要:
An image forming apparatus includes a plurality of image bearing members to bear a toner image on a surface thereof, a transfer device including a plurality of transfer members and an endless belt formed into a loop and entrained around the transfer members, to transfer the toner images from the image bearing members onto the surface of the belt so that the toner images are superimposed one atop the other on the belt to form a composite toner image, a plurality of cleaning devices including a cleaning blade to remove residual toner remaining on the image bearing members after transfer of the toner images onto the belt, and a plurality of heaters disposed inside the loop formed by the belt. Each of the heaters is disposed between adjacent image bearing members. The belt is interposed between the plurality of heaters and the plurality of image bearing members.
摘要:
An image forming apparatus includes an image forming unit; an intermediate transfer member; a secondary transfer member to form a secondary transfer nip with the intermediate transfer member and the secondary transfer member; a biasing mechanism to bias the secondary transfer member toward the intermediate transfer member; a cam member rotatable between a first position, at which a predetermined space is formed in the secondary transfer nip, and a second position, at which the secondary transfer member and the intermediate transfer member contact each other; and a contact-separation controller configured to put the cam member in the first position before entry of the recording medium into the secondary transfer nip, rotate the cam member toward the second position when the recording medium enters the secondary transfer nip, and change a start timing of rotation of the cam member in accordance with a thickness of the recording medium.
摘要:
An image forming apparatus includes: a belt unit that includes a belt-shaped image carrier stretched around and driven to rotate by a plurality of rollers; a belt tensioning unit that includes a tensioning member that is brought into contact with an image carrying surface of the belt-shaped image carrier and applies tension to the belt-shaped image carrier; and a cleaning unit that includes a cleaning member that is brought into contact with the image carrying surface of the belt-shaped image carrier and cleans the image carrying surface. The cleaning unit is supported by the belt tensioning unit in an attachable and detachable manner.
摘要:
An image forming apparatus includes an image forming unit; an intermediate transfer member; a secondary transfer member to form a secondary transfer nip with the intermediate transfer member and the secondary transfer member; a biasing mechanism to bias the secondary transfer member toward the intermediate transfer member; a cam member rotatable between a first position, at which a predetermined space is formed in the secondary transfer nip, and a second position, at which the secondary transfer member and the intermediate transfer member contact each other; and a contact-separation controller configured to put the cam member in the first position before entry of the recording medium into the secondary transfer nip, rotate the cam member toward the second position when the recording medium enters the secondary transfer nip, and change a start timing of rotation of the cam member in accordance with a thickness of the recording medium.
摘要:
An image forming apparatus includes a contact member supplied with voltage by a voltage application device, to contact an object; a rotary member rotatable about a rotation fulcrum shaft fixed to an image forming apparatus, to support the contact member; an biasing member to urge the rotary member to press the contact member against the object; a rotary conductive member fixed to the rotary member and connected electrically to the contact member; a main body side conductive member fixed to the rotation fulcrum shaft at the main body side and connected electrically to the voltage application device; and a conductive connector provided along the rotation fulcrum shaft to contact the rotary conductive member in an axial direction to connect electrically the main body side conductive member and the rotary conductive member. A contact of the conductive connector and a contact of the rotary conductive member are unfixed.
摘要:
A transfer device includes a plurality of rollers, a rotatable intermediate transfer belt wound around and stretched between the rollers, a transfer member disposed in the inner loop of the belt and facing an image bearing member of an image forming apparatus disposed at an outer circumference of the belt, to transfer an image formed onto the surface of the image bearing member when contacting the intermediate transfer belt, and a position adjuster to adjust the position of the intermediate transfer belt at different positions relative to the image bearing member. The positions include a contact state in which the intermediate transfer belt applied with a predetermined tension contacts the image bearing member, a first separation state in which the tensioned intermediate transfer belt separates from the image bearing member, and a second separation state in which the intermediate transfer belt separates further away from the image bearing member.
摘要:
An image forming apparatus includes an endless intermediate transfer belt rotatably stretched over a plurality of rollers, and a detector to read a pattern on the intermediate transfer belt. One of the rollers includes a first portion disposed opposite an area on the intermediate transfer belt including a pattern passing position, and a second portion not including a pattern passing position. The first portion has a diameter smaller than that of the second portion thereof, and an elastic material is superimposed on the second portion only. The detector is disposed between a second roller disposed upstream of the first roller and a third roller disposed downstream of the first roller, and opposite the intermediate transfer belt.
摘要:
A transfer device includes a plurality of rollers, a rotatable intermediate transfer belt wound around and stretched between the rollers, a transfer member disposed in the inner loop of the belt and facing an image bearing member of an image forming apparatus disposed at an outer circumference of the belt, to transfer an image formed onto the surface of the image bearing member when contacting the intermediate transfer belt, and a position adjuster to adjust the position of the intermediate transfer belt at different positions relative to the image bearing member. The positions include a contact state in which the intermediate transfer belt applied with a predetermined tension contacts the image bearing member, a first separation state in which the tensioned intermediate transfer belt separates from the image bearing member, and a second separation state in which the intermediate transfer belt separates further away from the image bearing member.