Abstract: An image forming device includes an inner guide, a first outer guide, a second outer guide and a control device. A fusing casing is arranged between the inner guide and a heat roller. The inner guide forms a downstream end portion of a transportation path and a paper output path. The first outer guide is arranged at a position facing an open portion of a fusing casing across the transportation path, defines the downstream end portion of the transportation path together with the inner guide, and includes a hook-shaped portion curved to guide printing paper to the paper output path. The second outer guide defines the paper output path together with the inner guide, and defines an upstream end portion of the reversal path. The control device controls a linear speed of a paper output roller to be faster than a linear speed of a duplex transportation roller at a switchback transportation of the printing paper.

Abstract: A steam generator for a laundry machine is disclosed, in which the power supplied to a heater is cut off before a water level of water used to generate steam is lower than an end of the heater, thereby avoiding a risk of fire. The steam generator includes a case coupled with the main body of the laundry machine. A heater is provided inside the case. A temperature fuse is provided inside the case when a coupling portion couples the case with the main body of the temperature fuse is configured to be higher than the heater based on a horizontal line.

Abstract: A switchback transport mechanism includes a first transport section, a second transport section, a third transport section, and a transport control section. The first transport section applies propelling force to a sheet in the guiding path. The second transport section applies propelling force to a sheet in the ejecting path. The third transport section has a first transport member and a second transport member placed so as to be attached to and detached from each other. The third transport section selectively applies propelling forces in a frontward direction and a backward direction to a sheet in the switchback transport path through the first and second transport members. The transport control section controls operations of the first, second, and third transport sections. The transport control section detaches the first and second transport members from each other in a time period when no sheet is being transported by the third transport section.

Abstract: A sheet transport device and an image forming apparatus that includes the sheet transport device. The sheet transport device includes a reverse-transport roller, at least one roller guide, and a shaft. The reverse-transport roller is provided to a diverging point of a sheet reversing portion from which a recording medium enters or exits and is configured to transport the recording medium to the sheet reversing portion. At least one roller guide is provided in a vicinity of an end face of at least one side of the reverse-transport roller and is configured to prevent the reverse-transport roller from contacting the recording medium when reversing the recording medium. The reverse-transport roller and the roller guide are disposed on the shaft. Friction of a peripheral surface of the roller guide is configured to be substantially less than that of the recording medium.

Abstract: An image forming apparatus includes: an image forming section on a main feed path for performing image formation on a first recording medium to be subjected to single-side printing and on a second recording medium to be subjected to double-side printing; and an output section for delivering these recording media. The apparatus has first to third positions between the apparatus and the output section at each of which a feed path branches off the main feed path. The apparatus further includes: a subsidiary feed path extending from the first position and joining the main feed path at an entrance of the main feed path; a first switchback feed path formed in a place extending from the second position for turning the second recording medium upside down; and a second switchback feed path formed in a place extending from the third position for turning the first recording medium upside down.

Abstract: An image forming apparatus includes an image reading unit configured to read image information of an original document, an image forming unit configured to form an image on a sheet according to the image information, a sheet discharge space located between the image reading unit and the image forming unit, into which the sheet is discharged after passing through the image forming unit, a first sheet discharge port disposed facing the sheet discharge space, a second sheet discharge port located beneath the first sheet discharge port, and a sheet handling unit detachably mountable in the sheet discharge space, configured to connect to the first sheet discharge port and block the second sheet discharge port when mounted in the sheet discharge space.

Abstract: In an image forming apparatus, a recording head discharges liquid droplets onto a sheet conveyed on a conveying belt to form an image on the sheet. A sheet discharge device is provided downstream from the conveying belt in a sheet conveyance direction and is intermittently driven independently of and in synchronization with the conveying belt to convey the sheet in a sheet discharging direction. A voltage application device applies a voltage to a charger. A distance between the charger and a nip portion formed between a pressing member and the conveying belt for duplex printing is set so that a voltage applied by the voltage application device increases a charged potential of the conveying belt in an area electrostatically attracting a trailing end of a predetermined sheet and a leading end of a subsequent sheet.

Abstract: An image forming apparatus capable of efficiently performing an image forming processing even in a case where a post-processing apparatus performs a post-processing during a both-sides printing. A first time period needed by a first both-sides image forming processing and a second time period needed by a second both-sides image forming processing are computed in a case where a post-processing unit performs a post-processing on a recording sheet formed images on both sides thereof. The first time period and the second time period is compared, and any one of the first both-sides image forming processing and the second both-sides image forming processing is selected based on the comparison.

Abstract: The image forming apparatus is provided with: a carrier that carries a toner image; a transporting unit that transports a sheet with using a transporting route; a transfer unit that transfers the toner image carried by the carrier to the sheet transported by the transporting unit; a fixing unit that fixes the toner image transferred by the transfer unit on the sheet; and an exit opening that is disposed so that a transfer position of the transfer unit is located between the exit opening and a fixation position of the fixing unit in a section including a transporting route over the entire length and that discharges the sheet on which the toner image is fixed by the fixing unit to an outside of the apparatus.

Abstract: An image forming apparatus to perform duplex printing, including a duplex printing unit selectively detached and mounted with respect to a main body thereof, a pivotable duplex printing unit cover to form a document circulation path for a recording medium, a pivotable guide, and a door openably mounted to the main body to correspond to the guide.

Abstract: A sheet feeding device including: a sheet feeding roller for sending sheets out one-by-one; a sheet stacking section in which a plurality of sheets can be stacked, and which pushes a sheet against the sheet feeding roller; an upper guide member able to move between a guiding position at which, at a time of double-sided printing, the upper guide member re-feeds to the image forming section an inverted sheet which is sent-in by a sheet re-feeding section, and a withdrawn position, at which sheet feeding of the sheet stacking section is possible; and a lower guide member which is rotatable and which abuts leading ends of sheets stacked in the sheet stacking section, wherein a guide path, which guides a sheet which is re-fed at the time of double-sided printing, is formed due to the upper guide member and the lower guide member rotating interlockingly.

Abstract: A sheet conveying apparatus includes a reference guide, a sheet introducing portion, a passage portion, a sheet guide portion, and an upstream side guide. The upstream side guide is provided at a position away from a sheet conveyed in a thickness direction of the sheet rather than the sheet guide portion so that an inclined surface side of the sheet is deflected when the end portion of the sheet abuts against an inclined surface of the sheet introducing portion. The sheet conveying apparatus further includes an inclined guide which is provided at the downstream side of the upstream side guide in the passage portion, guides the sheet conveyed by the upstream side guide, and is inclined in the thickness direction of the sheet so as to narrow a path interval of the passage portion.

Abstract: An image forming apparatus is disclosed that includes an image forming part configured to form an image on a recording medium, a feed part for feeding the recording medium, a manual feed part for manually feeding the recording medium, and a shutter member configured to open and close a manual feed opening from the manual feed part. The shutter member is provided so as to be swingable.

Abstract: An image recording apparatus which records images on front and back surfaces of a sheet, including: a head which ejects ink onto the sheet for recording; a sheet-supply roller which contacts the sheet to transfer the sheet for supplying to the head; sheet-transfer rollers which are disposed on a downstream side of the head so as to be rotatable forwardly and reversely, and which transfer the sheet passed through the head while nipping the sheet, toward an outside of the image recording apparatus when forwardly rotated or toward the sheet-supply roller when reversely rotated such that the sheet is permitted to be again supplied to the head by the sheet-supply roller; a sheet-return path which is branched from a connecting path that connects the sheet-transfer rollers and the head so as to extend toward the sheet-supply roller, and through which the sheet is transferred toward the sheet-supply roller by the reverse rotations; and a roller-driving control section which drives the sheet-transfer rollers and the s

Abstract: An image forming apparatus that forms an image on a front side of a sheet then reverses the sheet front and back sides and forms an image on the back side, including: a sheet conveying path; a sheet edge portion detection sensor; a sheet reference mark detection sensor; a first determination section for determination of a position of an image to be formed on the back side, referring to a detected edge of the sheet; a second determination section for determination of a position of an image to be formed on the back side, referring to a detected reference mark; and switching section for switching whether to use the first determination section or the second determination section for determination of the position of the image to be formed on the back side of the sheet, based on setting information on double-sided printing to be performed by the image forming apparatus.

Abstract: A sheet reverse conveyance device has a control part which controls so that the forward conveyance rotation member pair is set into a contact condition and the reverse conveyance rotation member pair is set into a detachment condition until a rear edge of the sheet which has entered the reverse conveyance path and is conveyed by the forward conveyance rotation member pair passes through an entrance of the discharge path, and in order to convey the sheet to the discharge path by the reverse conveyance rotation member pair, the forward conveyance rotation member pair is set into the detachment condition and the reverse conveyance rotation member pair is set into the contact condition after the rear edge of the sheet conveyed by the forward conveyance rotation member pair passed through the entrance of the discharge path.

Abstract: A sheet supplying device, which supplies a sheet to an image forming section, has a sheet feeding roller, a sheet stacking section, and a guiding member. The sheet feeding roller sends sheets out one-by-one. The sheet stacking section can be stacked with plural sheets and pushes a sheet against the sheet feeding roller. The guiding member is able to move between a guiding position and a withdrawn position. At the guiding position, at a time of double-sided printing, the guiding member re-supplies to the image forming section an inverted sheet which is sent-in by a sheet re-supplying section. At the withdrawn position, the guiding member is moved toward the sheet feeding roller and feeding of the sheet of the sheet stacking section is possible.

Abstract: According to an aspect of the invention, an image forming apparatus includes, an image forming section which forms an image on a sheet-like recording medium, a conveying path through which the recording medium passes, a conveying section which conveys the recording medium along the path in a conveying direction and has a reverse conveying portion which reversely conveys the recording medium in a direction opposite to the conveying direction, a main body, a first medium holding section which is disposed on the main body to hold the recording medium discharged from a first discharge port, a second medium holding section which holds the recording medium discharged from a second discharge port disposed above the first discharge port of the main body, and a third medium holding section which is disposed below the second medium holding section to hold the recording medium reversely conveyed by the conveying section.

Abstract: An image forming apparatus includes: a main body; a process cartridge detachably attachable to the main body, the process cartridge including an image carrier configured to carry a developer image thereon and a cartridge frame; a feeding path configured to feed a recording sheet to a transfer position where the developer image carried on the image carrier is transferred to the recording sheet; and a returning path configured to return the recording sheet that has passed the transfer position to the feeding path. The cartridge frame defines at least a part of the feeding path and at least a part of the returning path.

Abstract: A reverse conveying apparatus which again conveys a sheet formed an image by an image forming portion to the image forming portion includes a plurality of roller grippers which supports a sheet formed an image, and a belt which moves the roller grippers to a receiving position where a sheet is received and a carry-out position where a supported sheet is conveyed out. When a sheet is conveyed out in the carry-out position, the sheet is conveyed out such that a rear end thereof when it is received at the receiving position is a leading end.

Abstract: A disclosed image forming apparatus includes a main conveyance path configured to convey a recording medium from a paper feeding unit to a sheet discharge unit; a double-side reversing conveyance path configured to switch back a recording medium, one side of which has an image formed, so as to reverse the sides of the recording medium for double-sided image formation; a sheet resending conveyance path configured to resend the recording medium reversed in the double-side reversing conveyance path to the main conveyance path; and a double-side reversing open-space unit configured to provide a space for switching back the recording medium on the double-side reversing conveyance path. The double-side reversing open-space unit also serves as a temporary tray for storing misfed recording media and remaining recording media left inside the image forming apparatus when a jam occurs.

Abstract: To provide an image forming apparatus and a double-sided printing method for the image forming apparatus that can prevent occurrence of an image failure by providing a sheet retracting mechanism in a conveying path of an automatic double-sided printing device and preventing occurrence of temporary stop near a high-temperature fixing device during a double-sided printing operation.

Abstract: A method for checking a correctness of impositions and correct mutual register of the print pages at a front side and a rear side of different types of printed matters using a check print apparatus comprising two co-operating printers. The method includes preparing impositions in a control unit of the front side and the rear side of a print original to be made, printing a plurality of print pages having a first imposition of the front side of the paper, printing a plurality of print pages having a second imposition on the rear side of the paper with the page in position turned 180°, checking that the first and second impositions of the front and rear sides coincide, correcting the first and second impositions using the control unit when the checking step determines the first and second impositions do not coincide, and preparing a print original with the first and second impositions coinciding.

Abstract: An image forming apparatus includes an image forming unit to form an image on a printing medium; a discharging roller capable of transporting the printing medium which passes through the image forming unit in forward and reverse directions; a driving source to supply a rotation driving force in clockwise and counterclockwise directions to the discharging roller and the image forming unit; a duplex roller to transport the printing medium towards the image forming unit, which was transported in the reverse direction by the discharging roller; and a swing gear unit to receive the rotation driving force in the clockwise and counterclockwise directions to transmit a driving force to the duplex roller in a uniform direction.

Abstract: When an image is formed on a second side of a sheet, the image forming position is adjusted on the basis of a value calculated using the amount ?n of lateral registration deviation detected before forming an image on the first side and the amount ?n?1, of lateral registration deviation of the previous sheet on which image formation is performed. Thus, it is possible to adjust the positions of irradiation of laser light to the photosensitive drums and to start forming the second-side images as soon as the first-side images have been primary-transferred onto the intermediate transfer belt.

Abstract: A single-pass bypass printing machine including: (a) a moveable photoreceptor belt for moving through an imaging path; (b) apparatus for supplying and feeding print media along a main media path and a bypass media path; (c) a first stage including at least three imaging subassemblies for forming a first color toner image on the photoreceptor; (d) a first transfer station for transferring the first color toner image onto the print media; (e) apparatus for diverting the print media from the main media path onto the bypass media path; (f) a second stage including at least one marking engine for forming a second color toner image on the photoreceptor; (g) apparatus for moving the print media from the bypass media path back into the main media path; and (h) a second transfer station for transferring the second color toner image onto the print media, forming a desired multi-color toner image on the print media.

Abstract: An image forming apparatus includes an image forming portion that superposes images on an intermediate transfer member by rotations of the intermediate transfer member to form a color image on the intermediate transfer member, a transfer portion that transfers the image formed on the intermediate transfer member in the image forming portion to a sheet, a fixing portion that fixes the image onto the sheet, and a switchback portion that switches back the sheet so as to return the sheet to the transfer portion for forming the image on a second face of the sheet, after the image has been formed on a first face of the sheet. The sheet is returned through a return path at a return speed equal to or lower than a delivery speed of the sheet in the transfer portion, when the image for the second face of the sheet is the color image.

Abstract: A housing body includes a first part forming a part of a first transporting path in which a medium is transported. An image forming unit is accommodated in the housing body and is adapted to form an image onto at least one face of the medium. A door cover is attached to the housing body, and the door cover includes a second part adapted to face the first part when the door cover is closed, thereby forming the part of the first transporting path together with the first part. A double-sided printing unit is detachably mounted to the second part and includes a second transporting path. The second transporting path is connected to the first transporting path and is adapted to transport the medium while turning inside out, so that the image forming unit forms images on both sides of the medium.

Abstract: An order changing unit changes an image forming order from a first page order of an original document to a second page order that is different from the first page order. A conveying unit conveys a recording medium on which an image is formed by an image forming unit to a discharging unit. A determining unit determines whether the image forming order can be changed by the order changing unit.

Abstract: An image forming apparatus includes an image forming portion which forms a toner image on a sheet; a fixing rotary member pair which fixes the toner image onto the sheet; a reversing rotary member pair capable of performing a refeeding operation in which, in order to form a toner image on another surface of the sheet having one surface on which an image has been formed, the reversing rotary member pair rotates forward and then rotates backward to refeed the sheet toward the image forming portion; and a drive portion which drives the fixing rotary member pair and the reversing rotary member pair by a common drive source, wherein the drive portion can continue to rotate the fixing rotary member pair even when the drive portion stops the refeeding operation of the reversing rotary member pair.

Abstract: A two-side image forming apparatus of the present invention is provided with a first sheet-transferring path, for use in one-side image formation, for transferring, to a printed sheet storage section via an image transcribing section, a sheet supplied from an unprinted sheet storage section; and a second sheet-transferring path, connected to the first sheet-transferring path, for supplying a tuned-over one-side printed sheet to the image transcribing section, the two-image forming apparatus being controlled so that a plurality of sheets are transferred concurrently in an overall sheet-transferring path when performing two-side image forming operation, the overall sheet-transferring path including the first sheet-transferring path and the second sheet-transferring path. With this arrangement, it is possible to attain a significant improvement in process efficiency.

Abstract: An image forming apparatus that can satisfy productivity at the time of double-sided image formation without jamming due to a collision of a succeeding sheet with a preceding sheet, and without upsizing of the apparatus. The image forming apparatus performs a sheet circulation transport for circulating and transporting a sheet to an image forming unit to perform image formation on both a first side and a second side of the sheet. The sheet is fed to the image forming unit at a predetermined image formation start timing for the first side image formation. The first side image-formed sheet is reversed, and re-fed to the image forming unit for the second side image formation while causing the first side image-formed sheet to wait at least one of sheet waiting positions. A full state where all the sheet waiting positions are full of the first side image-formed sheets is detected.

Abstract: The invention describes a sheet conveying device having a feed tray for storing sheets, a first conveying path for conveying a first sheet in a first direction, a feed roller that feeds the sheets in the feed tray to the first conveying path, a second conveying path that connects the first conveying path and the feed tray, and conveys the first sheet in a direction opposite the first direction, and a multiple feed guide in the second conveying path, which has a guide for guiding the first sheet between the feed roller and the feed tray, and an overlying portion which overlies the feed tray on one side of the feed roller. The feed roller feeds the first sheet that was fed to the first conveying path, and was guided by the multiple feed guide, back to the first conveying path. A duplex printer incorporates this sheet conveying device.

Abstract: A duplex image forming apparatus includes a driving unit which has driving rollers and driven rollers to reversely feed the paper printed on the first surface to a duplex printing part or discharge the paper printed on the first and second surfaces, and a separation unit which separates the driven rollers from the driving rollers while the paper printed on the first surface is reversely fed and registered by duplex rollers of the duplex printing part. Accordingly, when the paper is registered by the duplex rollers, because the paper is not caught in the driving rollers and the driven rollers, the paper can be easily registered.

Abstract: In an image forming apparatus, a recording medium is temporarily stopped at an upstream of a fixing unit when the recording medium needs to be stopped for a longer time between the fixing unit and a curved path.

Abstract: In a construction for forming images on the both surfaces of a sheet, a speed controlling device for effecting the conveyance control of the sheet between a transfer device and a fixing device controls, when the image is to be formed on a first surface, the sheet conveying speed between the transfer device and the fixing device on the basis of loop detection by a loop detecting sensor provided between the transfer device and the fixing device so that a loop formed in the sheet may be maintained within a predetermined range. Also, when the image is to be formed on a second surface, the speed controlling device controls the sheet conveying speed between the transfer device and the fixing device on the basis of the average sheet conveying speed between the transfer device and the fixing device when the image has been formed on the first surface.

Abstract: A first and second printing engine are disposed with an intermediate transport belt in U-shaped arrangement. The method employs printing sheets serially on one side in the first engine inverting the sheet and transporting the sheets through about 180° change in direction without rotation. The commonality of the leading edge is thus maintained before and after inverting. The sheet is then fed to the second engine for duplex printing on the second side of the sheet. The second engine may have a media sheet input rotation for simplex printing serially with the duplex printing.

Abstract: In an image recording apparatus according to an aspect of the invention, a recording medium is allowed to be conveyed on a conveying path. An inversion guide portion connects a first portion of the conveying path positioned downstream of a recording unit to a second portion of the conveying path positioned upstream of the recording unit. A path changeover unit is disposed at the first portion of the conveying path and swingable between a recording medium discharge position and a recording medium inversion position. When the path changeover unit is positioned at the recording medium discharge position, the forward rotation of the roller pair allows the recording medium to be sent to a discharge portion. When the path changeover unit is positioned at the recording medium inversion position, the rearward rotation of the roller pair allows the recording medium to be sent to the inversion guide portion.

Abstract: An image forming apparatus includes a reverse conveyance path, a straight conveyance path, a duplex conveyance path, and two branch boards. The reverse conveyance path is used to output a recording sheet face down. The straight conveyance path is used to straight output a recording sheet face up. The duplex conveyance path is used to output a recording sheet on both sides of which images are formed. The two branch boards sandwich the straight conveyance path. At least one of the two branch boards swings at a time to switch to any one of the reverse conveyance path, the straight conveyance path, and the duplex conveyance path.

Abstract: A discharge unit is disposed downstream of a principal transport path of a compound machine, and a shifter function is provided in this discharge unit. By shifting the paper passage position relative to a photosensitive drum when printing the front side and the paper passage position relative to the photosensitive drum when printing the back side, the region in which the surface electric potential of the photosensitive drum increases is diminished, and the region in which photographic fog is generated is made smaller. Thus, when printing the second and subsequent sheets, even when a slight amount of displacement of the transport position of the recording paper occurs, it is possible to suppress that recording paper making contact in the photographic fog region on the photosensitive drum, and defective printing can be prevented.

Abstract: An image reading device and an image forming apparatus having the same. The image reading device includes a scan path to scan and read image information by a scan unit, a duplex path to connect a downstream side of the scan path to an upstream side of the scan path to achieve a duplex scanning operation, a discharge path having a first end to connect with the scan path and a second end to connect with a first document outlet port to discharge a scanned document, and a reverse path having a first end to connect with the duplex path and a second end to connect with a second document outlet port to reverse the direction of the document being fed to achieve a duplex scanning operation.

Abstract: An image forming apparatus having an improved structure to enable a user to conveniently operate the image forming apparatus at a front of the image forming apparatus, and a method thereof. The image forming apparatus includes a main body formed with a discharge port at a front portion, a printing unit mounted inside the main body and disposed adjacent to a front panel of the main body, a feeding unit to feed paper printed by the printing unit toward a rear panel of the main body, and a discharge reversal unit to reverse a moving direction of the paper fed by the feeding unit to feed the paper to the discharge port. A sensor to detect a moving position of the paper and a paper guide guiding movement of the paper is mounted between the feeding unit and the discharge reversal unit.

Abstract: An image forming apparatus for preventing sheet jams and displacement of image formation when forming images on both front and rear sides is provided. The apparatus includes first and second width regulation mechanisms, a reverse transport mechanism, and a link mechanism. The first width regulation mechanism is provided within a sheet holding chamber, and is movable with respect to a center of an image formation range of an image forming unit. The reverse transport mechanism is configured to turn the sheet from a first side to a second side upon the first side passing through the image forming unit. The second width regulation mechanism, provided within the reverse transport mechanism, is movable in the width direction. The link mechanism is provided between the first and second width regulation mechanisms for changing a position of the second width regulation mechanism in association with position change of the first width regulation mechanism.

Abstract: Embodiments of device and methods for winding media are illustrated and described.

Abstract: An image forming apparatus including: a first driven roller that forms a first nip portion with a driving roller; a second driven roller that forms a second nip portion with the driving roller at a downstream side of the first nip portion; a first transfer passage into which the sheet passed through the first nip portion and sent from the second nip portion is transferred by a forward rotation of the driving roller; a second transfer passage into which the sheet passed through the first nip portion is transferred by the forward rotation of the driving roller without passing through the second nip portion; and a third transfer passage into which the sheet is transferred by a reverse rotation of the driving roller after a rear end of the sheet has passed through the first nip portion by the forward rotation of the driving roller.

Abstract: When a recording material is conveyed to a double surface conveying portion, a second conveying roller pair is forward driven to convey the recording material conveyed by a first conveying roller pair forward driven. A control portion performs control so that the driving of the second conveying roller pair is stopped and the second conveying roller pair is separated in timing in which the first conveying roller pair is switched from forward driving to reverse driving.

Abstract: An image forming apparatus comprises a fixing unit for fixing toner image onto a sheet on which the toner image is formed, and a redelivery path for delivering the fixed sheet ejected from the fixing unit to the image forming unit again. A curved path receives the fixed sheet ejected from the fixing unit, reverses the sheet, and delivers the sheet to the redelivery path again. The redelivery path includes a horizontal-registration detection sensor for detecting the edge of the sheet in the width direction and a color density sensor for detecting the color density and color of an image formed on the sheet. A curl-corrector is disposed downstream of the curved path to straighten the curled sheet and then send the sheet to the horizontal-registration detection sensor and the density sensor.

Abstract: A toner image is transferred from a photo-receptor onto an intermediate transfer unit. A back up roller faces the intermediate transfer unit and is operable to transfer the toner image onto a sheet, thereby image formation is performed. A switch back unit is operable to turn the sheet inside out to perform the image formation onto a reverse face of the sheet after the image formation is performed onto an obverse face of the sheet. A fixing unit is operable to fix the toner image on at lease one of the obverse and reverse faces of the sheet. A switching unit is operable to transport the sheet toward the fixing unit or the switch back unit after the image formation is performed onto the obverse face of the sheet.

Abstract: A sheet curl correcting device and an image forming apparatus incorporating the same. The image forming apparatus includes a fixing unit for fixing a toner image transferred by an electrophotographic image forming unit to a sheet, a pair of rollers having different hardnesses for correcting a sheet curl, a controlling unit for controlling a deformation amount of one of the rollers in accordance with a table of curl correction amounts, and a curl correction limiter for limiting the curl correction amount if the sheet is to be discharged to a stacker.

Abstract: An electrophotographic imaging device comprises generally, an image transfer station configured to transfer a toned image to a substrate, a fuser assembly configured to fuse the toned image to the substrate and a transport device configured to transfer the substrate from the image transfer station to the fuser assembly. The device further includes a controller for controlling a first process rate of the image transfer device and a second process rate of the transport device. The controller has a mode of operation wherein the first process rate is different from the second process rate when a hand off is performed to pass the substrate from the image transfer station to the transport device.