Abstract: A sheet conveyance device, an image forming apparatus, and a sheet conveying method that convey a sheet in a predetermined sheet conveyance direction make a surface moving speed of a driven roller higher than a surface moving speed of a drive roller when a rotational driving force from the drive roller is transmitted to the driven roller, and by a one-way clutch that is provided at any place in a drive transmission path from the drive roller to the driven roller, restrict relative rotation of the driven roller in a first rotation direction, which is the sheet conveyance direction, with respect to the drive roller while allowing relative rotation of the driven roller in a second rotation direction, which is a direction opposite to the first rotation direction, with respect to the drive roller.

Abstract: An example method for controlling a carriage of a printing device is described. In one implementation, a target velocity value that satisfies a sharpness threshold is filtered by a processor resource of the printing device, a feed forward term is generated using a continuous model applied to the filtered velocity input using a plurality of electromechanical parameters, a feedback term is generated based on a difference between an expected pulse-width modulation (PWM) profile and an actual PWM profile, and a voltage to be provided to a motor of the carriage is adjusted based on the feed forward term and the feedback term.

Abstract: If a damper or a magnetic catch is used to make a guide member self-holdable in an opened state, a force is required for holding the weight of the guide member in the opened state. This increases an operation force for closing the guide member and degrades the operability. In contrast, if a mechanical holding mechanism without using the damper is employed, the hold may be disengaged without intention of a user. A sheet conveyance device includes an upper conveyance guide for guiding a conveyed sheet and a holding portion for holding the upper conveyance guide in an opened position with respect to a lower conveyance guide opposed thereto, wherein the upper conveyance guide includes an operation portion for disengaging engagement between the upper conveyance guide and the holding portion, and the holding portion includes an operation portion for disengaging engagement between the upper conveyance guide and the holding portion.

Abstract: A conveyance control device controls conveyance of a plurality of sheets including an image-formed sheet. The conveyance control device includes an obtaining unit configured to obtain display image data indicating a display image of each of the plurality of sheets; a region-specifying unit configured to specify common color regions having a common display color on the plurality of sheets based on the display image data; and a multiple feed detector configured to detect multiple feed of the sheets based on a light-receiving amount of light irradiated onto the common color regions; wherein the display image data indicating a display image of the image-formed sheet includes predetermined image data indicating a predetermined image to be previously formed and sheet image data indicating a sheet image displayed in a sheet color of the sheet.

Abstract: A braking content determiner determines a content of braking control on a rotating operation such that rotation of a paper feeding motor stops within a time required for stopping from a time point of detection of a sheet by a sheet sensor to a time point of passing of a trailing edge of the sheet through a paper feeding roller, the time required for stopping being determined based on a length of the sheet in a sheet conveying direction, a predetermined speed of the paper feeding roller, and a distance between the paper feeding roller and the sheet sensor in a sheet conveying route. A controller performs the braking control on the rotating operation of the paper feeding motor, according to the content determined by the braking content determiner, upon or prior to the detection by the sheet sensor of the sheet sent out by the paper feeding roller.

Abstract: An image reading apparatus comprising a reading unit, a detection unit, and a control unit, when the detection unit detects a closed state of the reading unit after the reading unit is opened in a reading operation by the reading unit, if the reading operation is able to be restarted from a state of suspension in which a conveyance of the document by the reading unit is suspended, the control unit controls the reading unit to restart the reading operation from the state of suspension.

Abstract: Provided is an information recording device in which jam processing operation can be easily performed with simple operation when a recording medium such as a card is jammed in a conveyance passage. A card storing section and a medium conveyance passage for conveying a card to an image forming section are arranged in a housing at upper and lower sides and a passage open-close member for removing a card jammed at the image forming section is arranged therebetween. Then, electronic information recording means is incorporated in the passage open-close member and a medium conveyance path which conveys a card toward the electronic information recording means is arranged on a medium introduction passage for feeding a card from the card storing section to the medium conveyance passage. According to the above, a card jammed at the image forming section or the information recording section can be easily removed to the outside of the device by opening the card storing section.

Abstract: A braking device 1 for braking advancing of the rear portion of a flat sheet when the sheet is advanced and is displaced by being pulled by its front portion: a surface over which the sheet is advanced, a suction hole 10 in the surface which communicates with an exhaust orifice 30 via an air circulation channel 20, a principal compressed air injection device 40 which, by a Venturi effect, indirectly generates a braking suction air flow through the suction hole 10, a secondary compressed air injection device 50 which, by a Venturi effect, indirectly generates a cleaning suction air flow through the suction hole 10.

Abstract: A medium transport device includes a restricting unit that is provided in a device main body, and that is coupled with an attaching and detaching operation of a unit body, which configures a portion of a transport pathway, to the device main body. The restricting unit changes between a first state that allows the cover to attain a closed state with respect to the device main body and a second state that restricts the cover from attaining a closed state with respect to the device main body.

Abstract: The present invention is to provide a printing apparatus capable of correctly detecting an origin of a conveying roller for conveying a print medium at the time of its rotation with a simple configuration that does not accompany an increase of cost. For this purpose, the printing apparatus is equipped with a lock mechanism (a lock link lever) for stopping rotation of the conveying roller at a predetermined rotational position and saves a count value of a rotation amount of the conveying roller when the conveying roller is locked by the lock mechanism concerned as origin information. After this, driving of the conveying roller is controlled based on the saved origin information and a phase of rotation of the conveying roller obtained from the count value of the conveying roller.

Abstract: A sheet feeder control method for controlling a sheet feeder of an image forming apparatus includes feeding a sheet through a sheet feed path exposable to the exterior of the sheet feeder, detecting the feeding of the sheet at at least a first position on the sheet feed path, discharging the fed sheet to the exterior of the sheet feeder, detecting the discharge of the sheet at a second position downstream of the first position in a sheet feeding direction, detecting a sheet jam during the feeding and discharging of the sheet, and if the jammed sheet is detected at the second position but not at the first position, cancelling a malfunction state due to the sheet jam when the sheet stops being detected at the second position, irrespective of whether the sheet feed path is covered or exposed.

Abstract: The invention relates to a sheet braking device for braking sheets transported in a transport direction. The sheet braking device comprises at least one holder, at least one sheet guide unit arranged adjacent to the at least one holder, and at least one sheet braking unit which is held by the at least one holder, is arranged adjacent to the at least one sheet guide unit, comprises at least one sheet braking body which has a first braking region to exert a braking force on the sheet to be braked, and comprises at least one second sheet braking body which has a second braking region to exert a braking force on the sheet to be braked. The at least one sheet braking unit is configured in such a way that in order to reduce the speed of the sheet, the first braking region and the second braking region are spaced from each other in the transport direction when acting upon the sheet to be braked.

Abstract: In a sheet feeding device, a feeding roller is driven and rotated to feed a sheet in a conveying direction of a sheet conveying path and a drive transmission mechanism transmits rotation drive force generated in a driving portion to the feeding roller. In this mechanism, a drive input gear having an inner space is arranged on a rotation axis supporting the feeding roller rotatably so as to rotate by the rotation drive force. A drive transmission gear arranged between the feeding roller and drive input gear on the rotation axis rotates and becomes slide-movable along the rotation axis between a first position transmitting the rotation drive force to the feeding roller and a second position cutting off the transmission of the rotation drive force to the feeding roller by the rotation drive force from the drive input gear to transmit the rotation drive force to the feeding roller.

Abstract: Upon continuous feeding of a plurality of sheets and upon detection of a leading end of a sheet by a detection unit before an elapse of a first time after a start of a paper feed roller, a controller performs control such that a paper conveyance speed of the paper feed roller is set lower than a paper conveyance speed of a registration roller, and the paper feed roller is stopped after conveying the sheet having the leading end detected for a specified conveyance distance before a next timing of starting the registration roller.

Abstract: A conveying portion includes a pair of superimposing rollers and a controller which controls the rotation of the pair of superimposing rollers, wherein the controller controls a rotation of a pair of conveying rollers so that a tail end of a first sheet passes a nip portion between the pair of conveying rollers by conveying the first sheet to the downstream side before a leading end of a third sheet superimposed on a second sheet reaches the nip portion between the pair of conveying rollers nipping the first sheet and the second sheet superimposed on the first sheet.

Abstract: Conveying mechanism includes first conveying element including upstream end on which feeding assembly for supplying sheet; and second conveying element for defining conveying path to guide sheet with the first conveying element, wherein the second conveying element has turning element including pivotal first and second ends, and displacement element coupled to turning element, pivotal first end is held near first conveying element, pivotal second end is coupled to the displacement element, displacement element along first conveying element defines conveying path when turning element is in a first position where turning element extends along first conveying element, and displacement element translates away from first conveying element while forming corner with turning element when turning element turns from first position to move away from first conveying element.

Abstract: A sheet feeding portion is provided with a pair of separation rollers that include a feed roller which conveys the sent sheet and a retard roller which applies a rotation force to return the sheet in a direction opposite to a sheet feeding direction through a torque limiter in a state of being pressed against the feed roller. The sheet feeding portion further includes a rotation transmitting mechanism that transmits a rotation of the retard roller, at the time of sending the sheet to the sheet feeding direction, to the pickup roller and a changing mechanism that switches a retard pressure, which allows the retard roller to be pressed against the feed roller, according to a reaction force that is transmitted to the retard roller from the pickup roller.

Abstract: An image forming apparatus includes an image forming unit forming an image on a sheet transported along a transport path in a printing operation; a sheet stacking unit in which the sheet ejected at the end of the transport path is stacked; a sheet detecting unit detecting the presence or absence of the sheet in the transport path; a counting unit counting number-of-sheet data of the sheet detected by the sheet detecting unit; and a control unit controlling the printing operation in accordance with a first print request from a print instructing unit for a print job and based on a count value obtained by the counting unit. The control unit clears the count value in the absence of a next print request from the print instructing unit within a predetermined time after completion of the printing operation.

Abstract: A sheet conveying device includes: a conveying unit; and a controller. The conveying unit is configured to convey a sheet along a conveying path. The sheet has a leading edge and a trailing edge. The conveying path includes a segment that is curved. The controller is configured to control the conveying unit to convey the sheet, determine whether or not a halting condition for halting conveyance of the sheet is met, and halt, if the halting condition is met, conveyance of the sheet when either one of the leading edge and the trailing edge of the sheet is positioned in a segment of the conveying path different form the segment that is curved.

Abstract: The present invention is to provide a printing apparatus capable of correctly detecting an origin of a conveying roller for conveying a print medium at the time of its rotation with a simple configuration that does not accompany an increase of cost. For this purpose, the printing apparatus is equipped with a lock mechanism (a lock link lever) for stopping rotation of the conveying roller at a predetermined rotational position and saves a count value of a rotation amount of the conveying roller when the conveying roller is locked by the lock mechanism concerned as origin information. After this, driving of the conveying roller is controlled based on the saved origin information and a phase of rotation of the conveying roller obtained from the count value of the conveying roller.

Abstract: A computer readable storage medium stores a feeding and conveyance control program. The feeding and conveyance control program causes a computer to perform executing sequence control of a feeding sequence module with respect to a feeding mechanism that feeds the recording medium. The sequence control includes two kinds of sequence control executed in accordance with an identifier indicating whether the vertical conveyance mechanism exists. Sequence control of a vertical conveyance sequence module is executed with respect to a vertical conveyance mechanism that relays conveyance of the recording medium. Sequence control of a resist conveyance sequence module is executed with respect to a resist conveyance mechanism that conveys the recording medium to the transfer position at a predetermined timing. Overall management of the above-described modules is executed.

Abstract: An image forming apparatus includes a manual feed portion provided on a side surface of a housing that accommodates an image forming portion and having an abutting portion against which a downstream end in a sheet feeding direction of a sheet inserted into a gap between the manual feed portion and the side surface abuts. The manual feed portion also includes a holding portion configured to hold the sheet such that a sheet surface is held along the side surface of the housing in the condition in which the downstream end of the sheet abuts against the abutting portion.

Abstract: When continuous-conveying control is executed in a conveying apparatus which can handle various sizes of sheet, a conveying apparatus which can efficiently detect a conveying error by a required minimum conveyed amount or conveying time according to a sheet size is provided. For that purpose, a maximum conveyed amount from start of sheet feeding of the subsequent page to determination to be a sheet-feeding error is set based on a detection result of a rear end portion on a previous page by a PE sensor. The maximum conveyed amount when the rear end portion of the previous page is detected is set smaller than the maximum conveyed amount when not detected.

Abstract: A stacking system for stacking paper from a linear feed.

Abstract: A multifunction printer (MFP) and a stopper applied therein are provided. The MFP includes a body, a top cover and the stopper. The body has a paper conveyor path, a paper holder located in front of an entrance of the paper conveyor path and a first rotating axle located in the paper conveyor path. A first side of the top cover rotates about the first rotating axle to be close to the paper holder. The stopper has a second rotating axle connected to the body, a connecting portion and an eccentric portion. The connecting portion is connected between the second rotating axle and the eccentric portion. The eccentric portion hangs down at the entrance of the paper conveyor path. A center of gravity of the stopper is located in the eccentric portion. A first stopping point of the top cover is located in a rotating path of the eccentric portion.

Abstract: A system for controlling friction forces acting on a mailpiece in a mailpiece insertion module. The system includes, a backstop assembly for arresting the motion of the envelope when disposed in a first positon and permitting conveyance along the feed path when disposed in a second position, an actuator operative to position the backstop assembly into the first and second positions and consuming energy to maintain the backstop assembly in the first position, a sensor for acquirinq data indicative of the magnitude of energy consumed by the actuator; a means for developing a pressure differential across the envelope to urge the envelope into frictional engagement with a plurality of drive belts and for developing friction forces along a mating interface, and a system controller, for varying the magnitude of the pressure differential and the friction forces developed along the mating interface of the envelope.

Abstract: A recording paper conveying device includes a registration roller pair and a conveyor roller pair adjacent to the registration roller pair. By rotating the conveyor roller pair, a sheet of recording paper is fed until leading edge of the sheet abuts the registration roller pair in stationary state so that the sheet is deflected by a prescribed amount. Then, conveyor roller pair is rotated at the constant velocity, and while the sheet is kept deflected, rotation of the registration roller pair is started, to start feeding of the sheet by the registration roller pair. While the registration roller pair is kept rotating, rotation of the conveyor roller pair is suspended, and then, the conveyor roller pair is returned to the state of rotation before suspension. Thus, unnecessary deflection of the sheet just in front of the registration roller pair can be prevented.

Abstract: A system for controlling friction forces acting on a mailpiece in a mailpiece insertion module. The system includes a backstop assembly for arresting the motion of the envelope when disposed in a first position and permitting conveyance along the feed path when disposed in a second position, an actuator operative to position the backstop assembly into the first and second positions and consuming energy to maintain the backstop assembly in the first position, a sensor for acquiring data indicative of the magnitude of energy consumed by the actuator; a means for developing a pressure differential across the envelope to urge the envelope into frictional engagement with a plurality of drive belts and for developing friction forces along a mating interface, and a system controller, for varying the magnitude of the pressure differential and the friction forces developed along the mating interface of the envelope.

Abstract: A sheet conveying device with a sheet conveyance path through which a sheet is conveyed include: a sheet guide that has a first end rotatably supported to move a second end to be close to or away from the sheet conveyance path; and a sheet detecting section that has a first end protruding beyond the sheet guide and a second end rotatably supported so that the first end is pushed by the sheet and rotated. A rotation shaft of the sheet detecting section is disposed farther from the sheet conveyance path than a rotation shaft of the sheet guide, and the sheet guide is provided with a moving portion for moving the first end of the sheet detecting section to an inside of a guide face of the sheet guide.

Abstract: A paper-feeding mechanism for a printing apparatus includes a delay engaging member and an unidirectional engaging member. The delay engaging member has a first gear and a first coupling member installed on the first gear. The first coupling member rotates relative to the first gear. The unidirectional engaging member has a third gear installed on the first coupling member. When a sheet of paper is pulled out along a first direction, the first gear rotates along a second direction that is opposite to the first direction. The first coupling member rotates along the second direction together with the first gear. The first gear stops rotating. The third gear and the first coupling member rotate along the second direction until the paper(s) caught in the printing apparatus are pulled out.

Abstract: A system for controlling friction forces acting on a mailpiece in a mailpiece insertion module.

Abstract: An image forming apparatus is disclosed that forms an image based on a control signal from an image processing controlling unit that processes input image information into image data. The apparatus includes a carriage that moves in a main scanning direction in accordance with the control signal; a conveyance unit that conveys a recording medium in a sub-scanning direction; an output detection unit that detects motor outputs of the carriage at any plural points when the carriage moves at a constant speed; and a jamming determination unit that compares an average value of the motor outputs of the carriage between the plural points with a predetermined tolerance to determine a conveyance failure.

Abstract: An information processing device includes an opening and closing member that is configured to be movable between open and closed positions, and an interference member that is positioned in a middle of an opening and closing trajectory of the opening and closing member. The opening and closing member takes the open position after the opening and closing member moves in a direction away from the interference member and takes the closed position after the opening and closing member moves in a direction toward the interference member.

Abstract: A blocking module is used for blocking at least an object from passing through a rail. The blocking module includes a linkage member and a blocking member. The linkage member has a first end and a second end, and there is a buffering space at a side of the first end. The blocking member has a pivoting end and a free end, in which the pivoting end is pivoted at the second end and the free end hangs down under the pivoting end due to gravity. When the free end of the blocking member leans against on the object on the rail, the object applies a counterforce onto the blocking member so as to drive the first end of the linkage member to move towards the buffering space. The invention also discloses a multi-function printer.

Abstract: The invention is directed to providing a sheet feeding apparatus including a stop mechanism configured to stop a sheet storage unit while the sheet storage unit is being drawn out from an apparatus main body, a stop release mechanism configured to release stop of the sheet storage unit by a stop mechanism and to enable detachment from the apparatus main body, a holding mechanism configured to hold a release state using the stop release mechanism of the stop of the sheet storage unit by the stop mechanism, and a return mechanism configured to release the holding of the release state of the stop mechanism by the holding mechanism while the sheet storage unit is being attached to the apparatus main body, and to return the sheet storage unit to a stop state using the stop mechanism.

Abstract: A paper-stopping mechanism of an automatic document feeder is provided. The paper-stopping mechanism comprises an auxiliary gear, a traction member and a paper-stopping arm. As a paper pick-up arm of the automatic document feeder is moved upwardly or downwardly, the auxiliary gear is rotated in different directions. Upon rotation of the auxiliary gear, the auxiliary gear is engaged with a rack of the traction member to drive movement of the traction member. Consequently, a transverse rod of the traction member is sustained against the paper-stopping arm or raises the paper-stopping arm. When the transverse rod is sustained against the paper-stopping arm, the paper-stopping arm fails to be rotated in the paper-feeding direction, so that the function of stopping the paper is achieved.

Abstract: A transport device and a transporting method. The transporting device includes a transporting unit, a plurality of medium sensing units, an encoder, a paper management module, a determining unit, and a transport controller. When the determining unit determines that a transport error has occurred in a succession transport medium based on a count value for an encoder signal, the paper management module stops counting, and the transport controller controls the transporting unit such that the transporting unit continues transporting a previous transport medium.

Abstract: An image forming apparatus includes an image forming unit; a conveyance unit; a motor; a stop order unit that orders stoppage of the motor; a detection unit, which detects a rotated number of the motor or a conveyance distance during a post-order period, and the post-order period being a period from when the stop order unit ordered stoppage of the motor until when the motor stops; a storage unit; a sensor, which detects passage of the recording medium; a timing determination unit, which determines a pre-order period as a appropriate order timing, wherein the pre-order period is calculated from dividing a difference between a first distance and a second distance by a conveyance speed, wherein the first distance is the conveyance distance stored in the storage, and the second distance is a distance between a position where the sensor detects passage of the recording medium and the target stoppage position.

Abstract: A stopping device and a multi-function peripheral (MFP) using the same are provided. The stopping device disposed in a track having a recess includes a driving unit, a forcing unit, a first restricting point, a second restricting point, a rotating unit, and a stopping unit. The forcing unit has a pivoting portion pivoted with the driving unit and a forcing portion. The forcing portion is located between the first restricting point and the second restricting point aligned in a perpendicular direction. The rotating unit has a rotating axle, and a first end and a second end located at two opposite sides of the rotating axle. The forcing portion of the forcing unit contacts the first end. The stopping unit has a third end and a fourth end. The third end has an opening, through which the second end of the rotating unit passes.

Abstract: A sheet conveying apparatus includes a first sheet conveying path, a second sheet conveying path branched from the first sheet conveying path, a switching member capable of moving in the branch portion of the first sheet conveying path and the second sheet conveying path, and a first regulation member and a second regulation member which regulate the movement of the switching member, wherein when the first regulation member is abutted against the switching member, the first regulation member forms a gap having a first interval through which the sheet can pass to the second sheet conveying path, when the switching member is further moved forward, and when the second regulation member is abutted against the switching member, the second regulation member forms a gap having a second interval smaller than the first interval through which the sheet can pass to the second sheet conveying path.

Abstract: A document feeding mechanism includes a driving shaft, a document blocking means, a tray, an elastic means and an actuating means. The tray is pushed up to connect the document blocking means by the elastic means. The actuating means is coupled to the driving shaft and abutted against the tray for pushing down the tray to separate from the document blocking means. The actuating means will be driven to allow the tray to be pushed to swing up by the elastic means for blocking documents. The actuating means will be driven to abut against the tray for pushing the tray to swing down for separating the tray from the document blocking means for conveying the documents. Therefore, the document feeding mechanism has high reliability for blocking the documents.

Abstract: An image forming apparatus (100) includes a rotation driving portion (40) configured to drive rotation of a discharge roller (31), a shift driving portion (50) configured to drive shift of the discharge roller (31), thereby causing shift, and a control portion (200) configured to control driving of rotation of the rotation driving portion (40) and driving of shift of the shift driving portion (50). The control portion (200) controls a discharge timing for sheet (P) that is being discharged such that a trailing edge (P2) of the sheet (P) moves past the discharge roller (31) during the shift of the discharge roller (31).

Abstract: There is provided a recording apparatus including: a first member having a first sliding surface formed into a comb shape along the direction of movement of an object; a second member having a second sliding surface formed into a comb shape opposing the first sliding surface of the first member with the intermediary of a viscous member, the second member sliding between a first position which causes a restricting member to be positioned at a restricting position and a second position which causes the restricting member to be positioned at the releasing position in a state of engaging the restricting member; and a urging device configured to apply an urging force which causes the second member to slide from the first position to the second position, the urging device being arranged at least partly between tips and roots of teeth of the comb shape of the second sliding surface.

Abstract: A sheet supplying unit that supplies sheets includes a sheet accommodation tray that accommodates the sheets in a stacked state, the sheets including a first sheet which is an uppermost sheet in the stack of the sheets and a second sheet which is immediately below the first sheet; a pick-up roller that conveys the sheets in a sheet conveying direction; a detection sensor that detects passage of the sheets and is disposed downstream of the pick-up roller in the sheet conveying direction; and a control unit that controls operations of the pick-up roller in accordance with outputs from the detection sensor.

Abstract: An image forming apparatus includes a sheet feeding device that feeds a sheet, and a conveyance belt that conveys the sheet toward a printing region while attracting the sheet with electrostatic force. The printing region is disposed in a vicinity of the conveyance belt. A printing device is provided in the printing region to form an image on the sheet. A controller is provided to control the conveyance belt to stop conveying the sheet toward the printing region for a prescribed period after the tip of the sheet arrives at the conveyance belt and raised from the conveyance belt unit the tip of the sheet settles to the surface of the conveyance belt.

Abstract: A bag supply apparatus for supplying bags onto a conveyer for transporting a bag bundle stacked such that an upper level bag is shifted forward, including a bag lifting device, which is provided with a pair of bag support members disposed facing one another on the left and right sides near the rear edge of a belt conveyor, and a rotation mechanism, which imparts translational motion of rotation in symmetric in a vertical plane with respect to the conveyance direction of the belt conveyor. The bag supporting portions of the bag support members contact the bag bundle from below to lift up the rear edge portion of the bag bundle and then separated from the bag bundle outwardly. While the bag supporting portions thus lifting the bag bundle, a new bag is fed into the space between the conveyance surface of the belt conveyor and the bag bundle.

Abstract: A sheet feeding apparatus includes first and second sheet sensors provided in order from upstream to downstream sides in feeding direction on a paper feed path, sheet conveyor roller sets arranged along the path, and a roller controller individually controlling groups of rollers on the upstream and downstream sides of the first sheet sensor, in response to a change in values of output signals from first and second sheet sensors. The roller controller includes an overlapped feeding determining device outputting a determination signal assuming a first value when overlapped feeding occurs and a second value otherwise, in response to the change in values of the output signals from the sensors, an overlapped feeding eliminating device eliminating overlapped feeding by controlling the roller controller upon receiving the determination signal of the first value, and a conveyor roller stopping device stopping the sheet conveyor rollers if the overlapped feeding eliminating process should fail.

Abstract: An apparatus for preventing printing plate deformation (29) in a plate processor device comprising a plate transport means (19) comprising a motor (15) and plurality of rollers (11, 12, 13, 14). A one way coupler (21) connects the motor (15) and the plurality of rollers (11, 12, 13, 14). Identifying means identifies the slower rollers and decouples the slower rollers from the motor.

Abstract: A method of interrupting a printing operation in a continuous transport process in which a first roller and a second roller transports plural printing mediums including a first medium on a tray in a transport direction to a printing area at which the printing operation is performed to each printing medium, the second roller is arranged at a downstream side of the first roller in the transport direction, and a third roller comes in contact with the first roller at a contact point to transport the printing mediums together with the first roller and is separated from the first roller not to transport the printing mediums, the method includes: separating the third roller from the first roller, when a trailing end edge of the first medium at least apart of which is disposed in the printing area is located at an upstream side of a predetermined point in the transport direction, and driving the second roller to transport the first medium after the third roller is separated from the first roller.

Abstract: A sheet conveying system which is capable of preventing a jammed sheet from being mixed with processed sheets, reducing waste in sheets and toners, and further alleviating the user's operations, when jamming has occurred during passing of a sheet between respective sheet conveying devices of upstream and downstream apparatuses. A puncher control section of a puncher as an upstream apparatus of the system issues a passing completion notification as to the passing of a sheet to a staple stacker control section of a staple stacker as a downstream apparatus of the system. Upon reception of the notification, when the staple stacker control section determines that the parameter of auxiliary information of the notification indicates an abnormal discharge of the sheet from the puncher, the staple stacker stops the conveyance of the sheet.