摘要:
A fixing device includes an endless fixing belt; a pressure roller to contact the fixing belt; a nip forming member to press the pressure roller from the fixing belt; a nip portion formed between the fixing belt and the pressure roller; a heater to heat the fixing belt to fuse and fix toner onto a recording sheet in the nip portion; an auxiliary driven roller; an auxiliary drive roller to drive the driven roller; an auxiliary nip portion, formed between an outer circumferential surface of the auxiliary driven roller and an outer circumferential surface of the auxiliary drive roller, to nip the recording sheet after toner fixation conveyed from the nip portion; and an outlet guide member, disposed downstream of the auxiliary nip portion, to guide the recording sheet after toner fixation conveyed from the auxiliary nip portion, with the toner-fixed recording sheet surface bent in a concave shape.
摘要:
A fixing device includes a fixing rotator rotatable in a predetermined direction of rotation and a pressure rotator pressed against the fixing rotator to form a fixing nip therebetween, through which a recording medium bearing a toner image is conveyed. A plurality of heaters heats the fixing rotator. A sensor is disposed opposite the fixing rotator and includes a plurality of temperature detection elements to detect a temperature of the fixing rotator at a plurality of spots thereon arranged in an axial direction of the fixing rotator. A controller is operatively connected to the sensor and the plurality of heaters to control the plurality of heaters based on the temperature of the fixing rotator detected by the sensor and predict a width of the recording medium in the axial direction of the fixing rotator to be conveyed to the fixing nip.
摘要:
A fixing exit guide plate for use in a fixing device, which supports the conveyance of a paper with being curved in a direction opposite to a curl direction of the paper in a paper conveyance path in a downstream of a conveyance support rollers, includes a conveyance downstream portion having a paper conveyance plane and a conveyance upstream portion having a paper conveyance plane, wherein the fixing exit guide plate is retracted in a paper jam process to move such that the paper conveyance plane of the conveyance downstream portion rotates about a rotation axis of the conveyance support driving roller to be substantially parallel to the paper conveyance plane of the conveyance upstream portion.
摘要:
A fixing device includes a fixing member; a heater to heat the fixing member; a nip forming member to contact the fixing member; and a pressure member, disposed opposite the nip forming member to press against the fixing member to form a fixing nip portion together with the nip forming member. The fixing device applies heat and pressure to fix an image transferred to a recording sheet when the recording sheet passes through the fixing nip. The nip forming member includes a first and second planar portions disposed at an upstream end and a downstream end, respectively, of the fixing nip portion, and the first planar portion and the second planar portion are continuous with a curved portion of the nip forming member. A guide member guides the recording sheet to bend in a direction opposite a back curl of the recording sheet generated in the fixing nip portion.
摘要:
A fixing device includes a fixing rotator rotatable in a predetermined direction of rotation and including a heated face and a heater including a contact face contacting the heated face of the fixing rotator. The contact face has a Vickers hardness not greater than about 600 Hv.
摘要:
A fixing device includes a first support and a second support to rotatably support a fixing rotator at a first lateral end and a second lateral end of the fixing rotator in an axial direction thereof. A first stopper is mounted on the first support. A second stopper is mounted on the second support. A first skew restraint projects from an outer circumferential surface of the fixing rotator radially at the first lateral end of the fixing rotator in the axial direction thereof. A second skew restraint projects from the outer circumferential surface of the fixing rotator radially at the second lateral end of the fixing rotator in the axial direction thereof. The second skew restraint comes into contact with the second stopper as the fixing rotator moves in the axial direction thereof toward the first support.
摘要:
A guide device for guiding a recording medium discharged from a fixing device includes a first conveyance wall plate and at least one rib assembly mounted on the first conveyance wall plate. The at least one rib assembly includes a plurality of primary ribs contacting the first conveyance wall plate, each having a first thickness in a recording medium conveyance direction; and a plurality of secondary ribs mounted on selected ones of the plurality of primary ribs. Each secondary rib includes a bottom contacting the primary rib and having a second thickness in the recording medium conveyance direction that is smaller than the first thickness of the primary rib; and a top contacting the recording medium and having a third thickness in the recording medium conveyance direction that is smaller than the second thickness of the bottom of the secondary rib.
摘要:
A sheet conveyor, which is incorporated in an image forming apparatus and in which a method of preventing sheet skew is performed, includes a sheet conveying path through which a sheet is conveyed, a first conveying unit disposed in a sheet conveying direction and including a shaft extending in a lateral direction, multiple rollers fixed to the shaft along the shaft, and a rotation regulator disposed between each of the multiple rollers and the shaft to idly rotate each of the multiple rollers in a given range about the shaft, a second conveying unit disposed along the sheet conveying path and downstream from the first conveying unit in the sheet conveying direction, and a sheet abutting part provided at the second conveying unit, against which a leading edge of the sheet abuts to form a slack of the sheet to correct skew of the sheet.
摘要:
A sheet conveying device includes a first rotating member, a second rotating member, and a biasing unit that biases the second rotating member toward the first rotating member. The first and second rotating members pinch a sheet therebetween and convey the sheet in a sheet conveying direction. The second rotating member includes a small-diameter portion that faces a conveying portion of the first rotating member, and a large-diameter portion at a position axially displaced from the conveying portion. The second rotating member can change its orientation to an orientation where a rotating shaft of the second rotating member is tilted relative to a rotating shaft of the first rotating member as viewed in the sheet conveying direction, thereby moving a position of an end portion of the second rotating member on a side of the large-diameter portion away from the rotating shaft of the first rotating member.
摘要:
An image forming apparatus includes an apparatus body, a manual operating unit, at least a part of which being exposed to an outside of the apparatus body and a part of which included inside the apparatus body being exposed to the outside by manually operating from the outside, a condensation part to which moist air in the apparatus body contacts to dew-condense to a water droplet, and a recovery container part containing the water droplet generated by the condensation part and being disposed on an inner surface of the manual operating unit included inside the apparatus body.