Abstract: A disclosed sheet carrying device includes a first carrying unit that includes a first rotary body, a first driving unit outputting a driving force at a first peripheral speed, a one-way clutch transmitting the driving force only in a sheet carrying direction, and a second rotary body driven by the first rotary body via the sheet; and a second carrying unit including a third rotary body rotating at a second peripheral speed being the first peripheral speed or more, a fourth rotary body carrying the sheet with the third rotary body, a second driving unit outputting a driving force for driving the fourth rotary body at a third peripheral speed being the second peripheral speed or more, and a torque limiter having a slip torque smaller than a sheet carrying torque and cutting off the driving force while the sheet is interposed between the third and fourth rotary bodies.

Abstract: A medium conveying apparatus includes a conveying unit including two rotating members for conveying a medium therebetween, a driving unit configured to drive a rotation of at least one of the rotating members, a parameter calculating unit configured to calculate a parameter of the driving unit, and a medium detecting unit configured to detect the medium conveyed by the rotating members by comparing the parameter calculated by the parameter calculating unit when the medium is conveyed by the rotating members and a reference parameter calculated by the parameter calculating unit when the medium is not conveyed by the rotating members.

Abstract: A document feeding device includes a document reader, a drive roller and a plurality of driven rollers. The document reader is configured to read a document fed in a feeding direction. The drive roller is disposed upstream of the document reader in the feeding direction. The plurality of driven rollers is disposed opposite to the drive roller to form nips therebetween. The plurality of driven rollers is supported by one common shaft extending in a direction orthogonal to the feeding direction. A position of at least one nip formed by at least one of the plurality of driven rollers is offset downstream or upstream of other nips formed by other driven rollers.

Abstract: An improved rotator/translator mechanism includes multiple thin discs that mate with an idler roll to distribute nip pressure and spin at different rotational velocities to produce the same linear velocity at the nip and thereby reduce marking on certain media.

Abstract: A paper transmitting mechanism mounted on the transmitting path which includes a driving wheel, a driving system drives the driving wheel, a pressure wheel, a pressure wheel adjusting unit, and a paper sensor settled upstream to the driving wheel and pressure wheel. The pressure wheel adjusting unit includes an elastomeric unit; one end of the elastomeric unit is connected to the axle of the pressure wheel, and the other end is connected to a linear driving device. When the paper sensor detects the paper is going to enter or leave the driving wheel, the paper sensor will send a signal for adjusting the clamping force between the driving wheel and the pressure wheel to make the clamping force and the friction between the driving wheel and the pressure wheel adjustable according to the position of the paper, so as to avoid the paper slipping or vibrating during transmitting.

Abstract: A supporting portion is provided to project from an upper surface of a side regulating member which is provided in a sheet feeding cassette which is detachably attached to a color laser beam printer body, and which regulates a position of a sheet in a width direction orthogonal to a sheet feeding direction, and this supporting portion regulates downward deformation of a conveyance guiding member which is positioned above the sheet feeding cassette and which forms a sheet conveying path R which guides the sheet.

Abstract: A paper sheet conveyance device for conveying a paper sheet to an image forming apparatus includes a corrugation roller for imparting corrugation onto both the left and right sides of a paper sheet, onto which an image has not been formed, with respect to a conveyance direction, by forming a curved portion along the conveyance direction.

Abstract: A conveying apparatus includes a suction mechanism that suctions an interior of a bag, and a connecting mechanism that connects an opening of the bag and the suction mechanism.

Abstract: The present invention relates to a medium transfer apparatus for an automated teller machine, wherein the structure for opening and shutting the medium transfer path of the medium transfer apparatus is simply formed, to thereby conveniently open and shur the medium transfer path of the medium transfer apparatus, and to conveniently and quickly prevent a jam occurring during the transfer of a paper medium performed by the medium transfer apparatus.

Abstract: A tri-roll curler apparatus includes an inlet roll, and exit roll, and a penetrating roll. The three rolls have substantially equal radii. At least one of the penetrating roll, and the inlet and exit rolls may be movable. Distances between the penetrating roll and the inlet roll, and the penetrating roll and the exit roll are substantially equal.

Abstract: In a sheet downstacker of a corrugator dry end, sheets are delivered by a drive system driving both the bottom and top nip rolls with a single motor that also drives the last flat belt sheet conveyor to the nip.

Abstract: An encoder idler roll includes an integral idler roll/encoder structure that forms an enclosed housing with a portion of the surface of the idler roll becoming the inner race for the encoder, as well as, the media encoding surface. Additionally, this integral idler/encoder configuration minimizes run out, improves tolerances between parts and stabilizes clearances between the idler roll and its support shaft.

Abstract: A conveyance device includes: a rotary member that rotates; a driven member that rotates in accordance with the rotary member and conveys a conveyed material while holding the conveyed material between the driven member and the rotary member; a guide part provided on an upstream side from a rotary shaft of the driven member in a conveyance direction of the conveyed material, that guides the driven member toward the rotary member; and a support member that brings the rotary shaft of the driven member into contact with the guide part, and along with the guide part, supports the rotary shaft.

Abstract: A sheet conveying device, that can be included in an image forming apparatus, includes a first sheet conveying path, a second sheet conveying path, a third conveying path, and a belt-type sheet conveying unit. The first sheet conveying path has a curved portion, and feeds and conveys a sheet therethrough. The second sheet conveying path has a curved portion and different from the first sheet conveying path, and feeds and conveys the sheet therethrough. The third sheet conveying path is provided from a confluence of the first sheet conveying path and the second sheet conveying path. The belt-type sheet conveying unit is disposed on one side of the third sheet conveying path corresponding to an outer side of the curved portion of the first sheet conveying path and an inner side of the curved portion of the second sheet conveying path.

Abstract: Sheet inverters and methods for inverting sheets are provided that guide longer length receivers through a 180 degree turn while the receivers are being transported along a transport path while reducing the possibility of jams, the extent of sheet stress experienced during inversion and reducing the risk of creating print artifacts.

Abstract: A system and method for decurling a sheet medium including a first penetrating roller and a second elastomeric roller mounted substantially parallel. A pressure-sensitive electrically conductive material has properties that vary with its state of compression. An actuator is operative for moving the first penetrating roller and the second elastomeric roller in a direction towards each other, to penetrate the body of the second elastomeric roller with the body of the first penetrating roller. The pressure-sensitive electrically conductive material is subject to pressure by the penetration of the first penetrating roller into the second elastomeric roller. A pair of electrical terminals applies an electrical charge across the pressure-sensitive electrically conductive material. In further embodiments, an electrical property is substantially continuously measured and the depth of penetration is substantially continuously controlled based upon closed-loop feedback of the substantially continuously measuring.

Abstract: A sheet conveyance apparatus includes: a guide unit for guiding the side end of the sheet; a first roller pair arranged on the downstream side of the guide unit for conveying the sheet, including a driven roller held in contact with a whole sheet in a sheet width direction; and a second roller pair having a conveyance roller arranged on the downstream side of the roller and adapted to convey the sheet, and a plurality of pinch rollers pinching the sheet in cooperation with the conveyance roller, wherein each of the plurality of pinch rollers applies to the sheet a conveyance force inclined toward a conveyance path side end, which is nearer to the pinch roller, and wherein the smaller the distance between the pinch roller and the conveyance path side end, the greater the inclination of the conveyance force thereof.

Abstract: An image forming apparatus has a main body for performing an image forming process on a sheet. An internal discharge stores a sheet after the image forming process and a discharge opening discharges a sheet to the internal discharge. A post-processing unit can be attached to the apparatus main body to apply a specified post processing to a received sheet. A junction can be assembled into the internal discharge to convey a sheet from the discharge opening to a receiving opening of the post-processing unit. The junction includes a first guide having a first guide surface for guiding a sheet, a second guide having a second guide surface facing the first guide at a predetermined distance and a support for supporting the second guide by a rotatable supporting portion. The support has a facing surface facing the first guide surface and has the supporting portion arranged on the facing surface.

Abstract: An image forming apparatus including a sheet conveying portion which conveys a sheet to be formed with an image, and an abutment member which is abutted by the tip end of a sheet conveyed by the sheet conveying portion, and movable to a first attitude of being abutted by the tip end of the sheet being conveyed, and to a second attitude of allowing passage of the sheet and being in the state of abutting the surface of the sheet, wherein the abutment member in the second attitude abuts a part which is outside an image forming region and on the sheet surface having the image forming region in a central part in a width direction orthogonal to a sheet conveying direction.

Abstract: In a sheet transport apparatus, coiled springs 82 are fitted in and supported by recess portions 81b at a bottom face 81a of a support frame 81 and recess portions 73c at an upper face 73b of an inner guide 73. In other words, most of the portions of the coiled spring 82 are enclosed inside the recess portions 81b of the support frame 81 and the recess portions 73c of the inner guide 73, and covered and hidden by side walls 81f of the recess portions 81b and side walls 73d of the recess portions 73c.

Abstract: A sheet conveying apparatus includes a conveying roller which conveys a sheet, a cylindrical motor which drives the conveying roller, an outer diameter of the motor being approximately equal to or smaller than an outer diameter of the conveying roller, and a supporting portion which supports the motor such that a rotational center of the motor is arranged coaxially with a rotational center of a rotational shaft of the conveying roller the motor is positioned within a maximum sheet that can be conveyed by the conveying roller in a width direction perpendicular to the sheet conveying direction.

Abstract: An improved rotator/translator apparatus includes a set of drive rolls driven by a pair of rotator discs. Idler rolls are positioned above each drive roll and spring loaded to provide the required normal force to drive sheets in any direction required. A pair of magnetic couplings couple the drive rolls with the idler rolls. The magnetic couplings are spaced with about a 5 mm gap to allow sheets to pass therethrough. The couplings allow the idlers and the drive rolls to stay aligned. Thus, driving media, registering media and rotating media in a transport is obtained, but with no relative motion or slip between the drive rolls/idler rolls and the media and a larger nip surface area, thereby eliminating marking of certain media.

Abstract: A medium carrying mechanism includes a carrying roller that carries a medium, two correction rollers for medium correction that face the carrying roller and that are positioned along a medium carrying direction, a bracket that includes a rotation shaft and that supports the correction rollers, a supporting member that supports the rotation shaft, and a bias member that biases the rotation shaft toward the carrying roller.

Abstract: A media conveying system for aligning a media sheet in a media path of an image forming apparatus may include a first roll mounted across the media path, a second roll mounted relative to the first roll so as to define a first nip between the first roll and the second roll, and a reference edge positioned along a side of the media path. A drive mechanism is coupled to the second roll for translating the second roll in a first direction such that a media sheet positioned in the nip moves in the first direction towards the reference edge.

Abstract: A medium transport device includes a rotating member forming a nip region with a facing member; a guide member configured to rotate in first and second directions opposite to each other; a protrusion serving as a positioning reference for the guide member; and a restricting member including first and second surfaces. The restricting member restricts rotation of the guide member in the first direction such that the guide member does not rotate beyond a position at which the first surface is in contact with the protrusion and at which the guide member guides a sheet medium in an intended direction, and restricts rotation of the guide member in the second direction such that the guide member does not rotate beyond a position at which the second surface is in contact with the protrusion and at which the guide member is not in contact with the facing member.

Abstract: A system and method for decurling a sheet medium including a first penetrating roller and a second elastomeric roller mounted substantially parallel. A pressure-sensitive electrically conductive material has properties that vary with its state of compression. An actuator is operative for moving the first penetrating roller and the second elastomeric roller in a direction towards each other, to penetrate the body of the second elastomeric roller with the body of the first penetrating roller. The pressure-sensitive electrically conductive material is subject to pressure by the penetration of the first penetrating roller into the second elastomeric roller. A pair of electrical terminals applies an electrical charge across the pressure-sensitive electrically conductive material. In further embodiments, an electrical property is substantially continuously measured and the depth of penetration is substantially continuously controlled based upon closed-loop feedback of the substantially continuously measuring.

Abstract: A media actuated, media diverter mounted on a media guide positioned between the output of a simplex path and the entrance of a duplex path in an imaging device. The media diverter comprises a plate having a media guiding surface and a media contract surface along portions of the edge of the plate. The plate is received within a slot through the guide member such that in a first position the media contact surface extends into the duplex path and when in a second position the media guiding surface extends into the simplex path with the plate biasable in the first position. A media sheet fed into the duplex path contacts the media contact surface actuating the media diverter to move the plate to the second position directing a following media sheet in the simplex path to an exit of the imaging device.

Abstract: A paper feeding module and multi-function printer using the same are provided. The multi-function printer includes a body, a paper transferring passage and a paper feeding module. The paper transferring passage includes an entrance. The paper feeding module includes a photoreceptor axle, a transferring axle and a skew correction axle. The photoreceptor axle is disposed on the paper transferring passage. The transferring axle is disposed next to the photoreceptor axle and contacts the photoreceptor axle. The skew correction axle is disposed between the entrance of the paper transferring passage and the photoreceptor axle. The skew correction axle contacts the transferring axle. The axes of the photoreceptor axle, the transferring axle and the skew correction axle are parallel to one another.

Abstract: For a device for the alignment of sheets, which comprises at least one first and one second driving roller (20) and at least one pressure roller (21), as well as at least one first and one second rotary drive (26) for rotating said first and second driving rollers (20), respectively, about an axis of rotation (28), a simple and cost-effective setup is achieved by at least one displacement drive for shifting at least the driving rollers (20) along the axis of rotation in such a manner that there is a change of distance between the driving rollers.

Abstract: A sheet conveying apparatus has a guide member disposed in a space on a side of a pair of rotating bodies. The guide member is supported such that the guide member can project outward from an outer periphery of one of the rotating bodies located upstream in a sheet conveying direction. When a front end of a conveyed sheet abuts against the guide member and pushes the guide member, the guide member retracts from a projecting position into the space on the side of the pair of rotating bodies, and in this state, the front end of the sheet is guided to a nip portion of the pair of rotating bodies.

Abstract: A conveying apparatus has first and second conveying roller pairs pair; a first conveying path through which a sheet is conveyed in such a manner that the first conveying roller pair is placed downstream of the second conveying roller pair; and a second conveying path through which the sheet is conveyed in such a manner that the first conveying roller pair is placed upstream of the second conveying roller path. |Va|>|Vb| when the sheet is conveyed through the first conveying path and |Va|?|Vb| when the sheet is conveyed through the second conveying path, where |Va| is an absolute value of the circumferential velocity of the first conveying roller pair, and |Vb| is an absolute value of the circumferential velocity of the second conveying roller pair.

Abstract: A transport system for cut sheet media has a first and second cylinder to form a nip, a support subsystem to transport edges of cut sheets having at least one image into and out of the nip, and an array of contact points on each cylinder to make contact with the cut sheets without marking the image. A wheel for a print medium transport system has an outer rim having a series of contact points, an inner hub supporting a means to accommodate a drive shaft, and an internal spring connecting the outer rim to the inner hub. A method of transporting cut sheets in a printing system forms a nip between at least one pair of cylinders, each cylinder having an array of contact points, guides a first edge of a cut sheet into the nip, and uses the arrays of contact points to transport the cut sheets through one of either a fusing or drying process.

Abstract: A medium pressurizing device includes: two rotating bodies that rotate and allow a recording medium held in a contact part to pass; a pressurizing member that applies, to one of the rotating bodies, a pressure of pressing the one toward the other; a drive roll disposed downstream from the contact part in a conveyance direction, and rotating thereby transmitting a conveyance driving force to the recording medium; and a following roll contacting the drive roll, and rotating by following rotation of the drive roll, thereby conveying the recording medium held therebetween. The device further includes: an axis member rotating by receiving a driving force; and a cam member fixed to the axis member, acting on the pressurizing member, and following rotation of the axis member, thereby changing the pressure. The following roll has a hollow, and the axis member is disposed to pass through a space in the hollow.

Abstract: Image forming apparatus having sheet transport device transporting sheet through nip between pressing and drive members by applying rotational force to drive member via power transmission mechanism that includes: first and second rotational shafts connected to drive member and drive source, respectively; first and second rotation transmitting members attached to first and second rotational shafts, respectively; holding member including first and second contact parts disposed on opposite sides of second rotation transmitting member; and rotational move member switching to power non-transmission and transmission states by moving holding member rotationally to first and second positions in conjunction with opening and closing operations of opening/closing member of apparatus housing. Power is not transmitted between rotational shafts in power non-transmission state and transmitted in power transmission state.

Abstract: A roll assembly, including a frame; a first component mounted to the frame and having a shaft, the shaft; a second component rotatably mounted to the frame and disposed in proximity with the first component, wherein at least one of the first component and the second component is translatable relative to the other; and a plurality of separator devices mounted on ends of the shaft of one of the first and second component.

Abstract: A method of controlling transport amounts of a pair of first rollers and a pair of second rollers, the pair of first rollers operable to nip a medium so as to transport the medium in a transport direction, the pair of second rollers operable to nip the medium so as to transport the medium and disposed at a downstream side of the pair of first rollers in the transport direction, the medium on which a recording is performed by a recording head disposed between the pair of first rollers and the pair of second rollers, the method includes performing a first correction with respect to the transport amounts of the pair of first rollers and the pair of second rollers; and performing a second correction with respect to the transport amounts of at least the pair of first rollers, from a state in which length between a trailing end of the medium and a nip point of the medium at which the medium is nipped by the pair of first rollers is a predetermined length to a state in which the medium is released from being nipped

Abstract: A new media path includes a flexible member that cooperates with a control point for smooth transitions of media sheets along the path. The media path includes an elongated member having a first end and a second end, the elongated member having a longitudinal axis and a cross-member axis perpendicular to the longitudinal axis, the elongated member having a first surface that is non-linear in at least one of the longitudinal and cross-member axes, and a bevel on a second surface of the elongated member, the bevel being proximate to the first end of the elongated member at a predetermined distance from the first end.

Abstract: A paper sheet counting apparatus includes a hopper; a transport mechanism that feeds the paper sheets to a transport path one by one, and transports the paper sheets along the transport path; a sensing unit including a counting sensor for counting the paper sheets; and a stacker. The transport mechanism includes a drive roller constituting an inside of a turn portion for changing a direction of the transport path; pinch rollers that biases the paper sheet against the drive roller; and a turn guide plate arranged between the pinch rollers to guide the paper sheet along an outer periphery of the drive roller. The turn guide plate is formed such that a front edge of the paper sheet transported to the turn portion is guided to a contact portion between a pinch roller arranged on a downstream side and the drive roller.

Abstract: A decurler system includes a metallic penetrating roll and a conductive elastomeric idler roll that is movable from an open position to a contact position. The penetrating member is connected to an electrical power supply. When the idler roll contacts the penetrating roll, the idler roll conducts electrical power supplied to the penetrating roll. An initialization process includes detecting an electrical current conducted by the idler roll to determine that an idler roll is in a contact position. An idler roll wear is monitored by counting a number of steps that the idler roll is driven before an electrical current is detected at the idler roll.

Abstract: A pair of conveyor rollers arranged in an image forming apparatus to convey a recording sheet is configured to be shiftable relative to the body between a first position and a second position. A first holding member is configured to support one of the conveyor rollers so that the supported conveyor roller is swingable around a pivot to allow the pair of conveyor rollers to be shifted between the first position and the second position. The first holding member including a sheet guide portion which provides a variable-position guideway extending from a position located upstream along the sheet conveyance path toward a peripheral surface of the supported conveyor roller, where the sheet guide portion moves to a position suitable to guide the recording sheet to be nipped by the pair of conveyor rollers at least when the pair of conveyor rollers is shifted to the first position.

Abstract: A sheet conveyance apparatus includes a conveyance unit configured to convey a sheet and a pair of roller units, provided on a downstream of the conveyance unit in the conveyance direction, wherein the pair of roller units forms a plurality of nipping portions, arranged along a width direction orthogonal to the conveyance direction, a downstream end of the sheet to be conveyed is caused to abut against abutting positions of the plurality of nipping portion, and wherein the abutting position of the nipping portion nearer to a center in the width direction is positioned on a more downstream in the conveyance direction than the abutting position of the nipping portion at end side in the width direction.

Abstract: In a sheet conveyance apparatus, a sponge roller is provided at a joining portion in which a first sheet conveyance path joins a second sheet conveyance path. A leading edge of a sheet or tailing edge of a sheet abuts at the sponge roller when the sheet is conveyed from the first conveyance path to the second conveyance path. In a projection surface in a direction orthogonal to a sheet conveyance direction in the second sheet conveyance path, an outer periphery of the sponge roller and an outer periphery of a conveyance roller, which is positioned in a downstream side, are partially overlapped in the second conveyance path. Further the sponge roller is rotatably arranged. With such a configuration, the noise generated in the joining portion can be reduced, and effect to reduce the noise can be continued.

Abstract: An elastic sponge roller is provided at a confluence portion where a first sheet conveyance path joins in a second sheet conveyance path and a leading edge and a rear edge of a sheet are brought into contact with the sponge roller when the sheet is conveyed from the first conveyance path to the second conveyance path. Further, the sponge roller is connected to drive via a one-way clutch. Such a configuration reduces a sound produced at the confluence portion and prevents the leading edge of the sheet from being bent in colliding with the sponge roller to stabilize the conveyance of the sheet.

Abstract: A paper discharge device includes a waiting path having one side connected to an input port and another side connected to a discharge port, and a collection path having one side connected to the waiting path through a merged portion and another side connected to a collection chamber. Conveyance mechanisms convey a paper which was conveyed through the input port to the discharge port in a forward direction, and convey, after lapse of a given period of time after the conveyance of the paper, the paper in a reverse direction through the merged portion to feed into the collection path. An input mechanism provided in the collection path conveys the paper fed from the waiting path through the collection path into the collection chamber while sandwiching the paper between rollers to form folds across a total length of the paper along the paper conveying direction.

Abstract: A conveying roller conveys a sheet. A sheet holding portion receives a sheet from below and holds the received sheet with keeping its forward end upward and its rear end downward. The sheet holding portion has: a storing guide provided in a vertical state and having a guide surface configured to guide the received sheet upward; a conveying guide provided to face the guide surface and having a curved surface portion whose distance from the guide surface increases in the upward direction; and a holding member provided between the guide surface and the curved surface portion and configured to roll on the curved surface portion toward the guide surface to nip the received sheet with the guide surface. An inclination angle of the curved surface portion with respect to the guide surface decreases with distance from the guide surface.

Abstract: An image forming apparatus has a pair of registration rollers which conveys a sheet to an image forming portion. The pair of registration rollers includes a first registration roller, which is fixed to a registration roller shaft and includes first and second registration roller rubbers formed of an elastic body and third to sixth registration roller rubbers, and a second registration roller includes first to sixth rollers in press contact with the registration roller rubbers of the first registration roller. The press contact portions between the registration roller rubbers of the first registration roller and the first to sixth rollers of the second registration roller are different in length in a sheet conveying direction.

Abstract: A media transport system comprising a roller system, a baffle, and at least one lead-in guide positioned to guide a sheet towards the roller system. The roller system includes a drive roller and an idler roller forming a nip, each roller being mounted on a corresponding drive shaft and an idler shaft, respectively. The lead-in guide, lying at an angle to the baffle, is coupled to at least one of the drive shaft or an idler shaft. The mounting of the lead-in guide eliminates tolerances between the lead-in guide and the nip due to baffle flatness, or baffle and shaft deflections as the lead-in guide is positioned by the drive shaft that locates the nip roller. This arrangement enables the lead-in guide to direct a leading edge of the sheet substantially close to a tangent plane of the nip and minimizes drive forces in the system.

Abstract: A system for conveying sheets of corrugated paperboard material or other materials. The system includes a processing module configured for transferring the material in a conveying direction, the processing module having a first nip point. A conveyor is positioned downstream of the processing module and also configured for transferring the material in the conveying direction. The conveyor includes a first support roller and second support roller having a first conveyor belt wound therearound, with the belt defining a deflector section extending from the first support roller to the second support roller. Similar to the processing module, the conveyor includes a second nip point. An adjustment drive can be operatively associated with either or both of the first and second support rollers and configured to adjust the position of the second nip point in or counter to the delivery direction.

Abstract: A sheet 3 is caught between a clamper 15 and a platen drum 10 at its sheet front end portion. The clamper 15 is provided with a pressing member 32 with elasticity, and the pressing member 32 has two projections 32b. During conveyance, a pressing surface 32a tightly comes into contact with the front end portion of the sheet 3, while each projection 32b is elastically deformed and compressed. When correcting skew of the sheet 3, the clamper 15 is turned, while only the projections 32b press the front end portion of the sheet 3.

Abstract: In a first step, a sheet is conveyed in a direction, whereby a leading end portion of the sheet is fed to a position between a decurl roller and a decurl pinch roller, which are in positions spaced apart from each other. In a second step, the leading end portion of the sheet is curved and held by causing the decurl pinch roller to come close to or press against the decurl roller. In a third step, the leading end portion of the sheet is withdrawn from between the decurl roller and the decurl pinch roller by conveying the sheet in a direction opposed to the conveying direction. After executing the first to third steps, the sheet is conveyed in the conveying direction through the first step while the sheet is curved by the decurl roller.