Abstract: To prevent deviation in a processing position of a sheet bundle caused by buckling of the sheet bundle and handle a number of diversified kinds of sheets without increasing the size of apparatuses, a sheet processing apparatus and a image forming apparatus includes a pair of saddle entrance rollers which discharges a sheet; a stack tray which stacks the sheet discharged by the roller pair; a gripping member which grips the rear end portion of the sheet in the discharging direction which is stacked by the tray; a gripper which grips the front end portion of the sheet in the discharging direction which is stacked by the tray; and a stapler, etc., which processes a sheet bundle at a processing position, wherein the gripping member and the gripper grip the sheet bundle stacked by the tray and move the sheet bundle to the processing position in cooperation with each other.

Abstract: The invention relates to a method for the alignment of a sheet in a direction transverse (cross-track) to its transport direction in a sheet-printing machine, in particular in a digital printing machine, preferably in an electrographically operating printing machine. The object of the invention is to improve, in a simple manner, a method and a device of the aforementioned generic types in view of a first rough alignment of the individual sheet. Referring to the method, this object is achieved in accordance with the invention in that the individual sheet is flipped about a preferably non-physical, mathematical or imagined flipping axis extending in transport direction, and that this flipping produces a transverse offset of the sheet in transverse direction.

Abstract: A sheet conveying apparatus is provided with a decurling mechanism to correct a curl formed on a sheet; a pair of guides including a first guide member and a second guide member arranged to oppose to the first guide member, the pair of guides constituting a conveyance passage to guide a sheet discharged from the decurling mechanism toward the downstream side in the sheet conveying direction; and an auxiliary guide arranged to protrude obliquely in the sheet conveying direction from the side of the first guide member toward the second guide member to a predetermined position in the conveyance passage.

Abstract: A sheet conveying device includes a torque estimation unit that, based upon a first load torque generated at a time that a sheet-like member passes through a first nip between a first driving roller and a first driven roller of an upstream sheet conveying unit, estimates a second load torque generated at a time that the sheet-like member passes through a second nip between a second driving roller and a second driven roller of a downstream sheet conveying unit; and a control unit that controls the driving torque such that the second load torque is counterbalanced by applying a counterbalancing torque in synchronization with a timing of entry of the sheet-like member into the second nip.

Abstract: A sheet registration system for a sheet handling device has a plurality of driven belts. Each belt is entrained about a driven roller and an idler roller. The driven rollers are fixedly mounted on a common drive shaft that is connected to a motor. The idler rollers each have a shaft and the idler shafts are coaxially aligned and parallel to the common drive shaft. Adjacent idler shafts are interconnected. The idler rollers are cantilevered about the common drive shaft and may be pivoted thereabout. The gravitational force on the cantilevered idler rollers provide the normal pressure on the belts to produce the frictional force necessary to acquire and register incoming sheets. Selective pivoting of the idler rollers in response to sheet media parameters inputted to a control panel by an end user automatically varies the normal pressure of the idler rollers and adjusts the frictional force of the belts.

Abstract: An image forming apparatus includes a printer body having a developing portion and a fixing portion therein; a plurality of sheet feeding rollers successively disposed along a sheet discharge path of the printer body and driven to discharge a sheet from fixing portion to an upper portion of the printer body; and a rear cover portion having a rear cover provided on a side of the printer body to open and close, a guide rib member to guide the sheet from the fixing portion, an idle roller to rotate in contact with one of the sheet feeding rollers to feed the sheet, and a supplementary guide member to change a position thereof when the rear cover is open to prevent the sheet being discharged to the guide rib member from running into the idle roller.

Abstract: A de-skew mechanism includes a driving shaft installed on a frame of an image forming device and driven by a motor, an active roller installed on the driving shaft and driven by the driving shaft, and an idle roller driven by the active roller for driving a medium with the active roller. A nip is formed between the active roller and the idle roller. The de-skew mechanism further includes a correcting member installed on the driving shaft in a rotatable manner and located upstream of the nip for correcting skew of the medium in a correcting position, and a restoring member connected to the correcting member for loading torque to the correcting member so as to drive the connecting member from the correcting position to a releasing position where the medium pass therethrough.

Abstract: A sheet processing apparatus including: a stack tray on which a sheet successively delivered from a delivery port is stacked, the stack tray including: a folding route receiving the sheet from the delivery port; a sheet folding device provided in the folding route to fold the sheet; and a sheet stacking surface for stacking the sheet, wherein the sheet processing apparatus is operable in selectively between a first mode in which a sheet from the delivery port is stacked on the sheet stacking surface, and a second mode in which a sheet folded by the sheet folding device is stacked on the same sheet stacking surface as in the first mode.

Abstract: An automatic document feeder for electric equipment includes an input tray, a driving mechanism, and a block mechanism. The input tray has a receiving end, a discharge end, and a first path extending from the receiving end to the discharge end. The driving mechanism includes a separating-roller shaft disposed above the input tray and in proximity to the discharge end, and a separating roller sleeved fixedly on the shaft. The blocking mechanism includes a blocking member pivotable between a blocking position whereat the blocking member is disposed on the first path, and a non-blocking position whereat the blocking member is removed from the first path. A driven arm is connected to and co-rotatable with the separating-roller shaft so as to pivot the blocking member between the blocking position and the non-blocking position.

Abstract: A registration and measurement system for a printing machine includes two drive rollers and two opposing idler rollers. Each drive roller and idle roller combination respectively form a drive nip. A single servo or stepper motor is operably connected to the drive rollers through a gear train, allowing the motor to drive the sheet feeding nips. A rotary encoder is attached to each idler roller. Optical sensors are provided above a desired sheet path. The optical sensors and the rotary encoders are connected to a controller and are operable to deliver output signals to the controller. The controller is operable to determine the length of a sheet passing through the nips based upon the signals received from the optical sensors and the rotary encoders.

Abstract: There is provided a paper sheet handling apparatus capable of processing a deviated banknote in a banknote storage bin so as to displace the banknote to an optional position. The banknote handling apparatus incorporates a deviation processing means making contact with at least one side of a banknote in a paper sheet storage bin in which banknotes are stacked one upon another, for applying a force to the banknote at least in a direction of deviation of the banknote. The deviation processing means falls, during operation thereof, either in a condition in which it makes contact with a paper sheet in the paper sheet storage bin or in a condition in which it does not make contact therewith.

Abstract: A paper feeder and an image processing apparatus using the same are provided. The paper feeder includes a feeding plate, a paper guide, a paper-feeding unit and a friction provider. The feeding plate is for supporting at least one sheet of paper. The paper guide is disposed on a side of the feeding plate for aligning the sheet of paper. The paper-feeding unit is disposed at a paper-feeding end of the feeding plate for conveying the sheet of paper. The friction provider is disposed on one lateral side of the paper-feeding unit, for increasing the friction between the sheet of paper and the surface of the feeding plate, and the paper guide is disposed on the other lateral side of the paper-feeding unit.

Abstract: Device for the transport and weighing of letters, wherein the letter is conveyed between at least two conveyance elements and is stabilized laterally outside the conveyance elements by at least one guide element so that a deflection or fluttering of the letter can be reduced or avoided, at least when the letter is seized at its front edge by the transport elements.

Abstract: A curved conveying guiding portion which guides a sheet toward a skew correcting unit is provided on a sheet conveying direction upstream of the skew correcting unit which corrects a skew of the sheet by rotating the sheet while conveying it. By narrowing an interval in the vertical direction in a center portion in the lateral direction of the conveying guiding portion, when a sheet S is rotated and corrected by the skew correcting unit, a load which the sheet to be corrected receives from the conveying guiding portion is reduced.

Abstract: Systems and methods for reducing sheet skew in a document processing device are disclosed. A document processing device may include a plurality of nips, a sheet skew measurement system, a feedback controller and an actuator. Each nip may include an idler wheel and a drive wheel. The sheet skew measurement system may be configured to measure sheet skew for a sheet. The feedback controller may be configured to generate a control signal in response to the sheet skew measured by the sheet skew measurement system. The actuator may be configured to adjust a loading force applied to a sheet by an idler wheel for at least one nip in response to the control signal.

Abstract: A sheet feeding device includes a sheet feeding member, a friction separation member, a retaining member, a downstream guiding member, and a biasing member. The downstream guiding member is arranged downstream of a sheet conveyance direction than the friction separation member such that its guide surface is inclined at a predetermined angle to a front surface of the friction separation member towards the sheet feeding member. A line joining an apex of a sheet guiding member arranged upstream of the sheet conveyance direction than the friction separation member and an apex of the downstream guiding unit is positioned towards the sheet feeding member than a contact portion of the sheet feeding member and the friction separation member.

Abstract: A de-skew mechanism, in an image forming device, with a correcting member disposed in a rotatable manner to the rotary shaft and turning with driving roller by a spring between them. A torque spring suppresses the turning of the correcting member to correct the skew of the medium. When conveyed, the medium will butt against the correcting member to be stopped and corrected. The medium conveying force and the force that the spring brings to the driving roller are sufficient for turning the correcting member and passing therethrough. At one time, the force that the correcting member brings to the medium will reduce to zero. As such, the medium will not be damaged by the correcting member while being conveyed.

Abstract: Folded inserts (B) are added to folded or bound printed products (P) which, held individually by transfer grippers (6), are conveyed in an essentially continuous fashion, in that the inserts are placed on the folded or rear edges of the printed products in a manner whereby their fold (8) is aligned with the folded or rear edge of the latter. If necessary, the inserts (B) are attached by gluing or stapling to the folded or rear edges of the printed products (P). For adding small inserts the printed products (P) can be conveyed with their folded or rear edges held by the transfer grippers (6) of a printed product conveyor (1) and the insert (B) can be placed next to the gripper (6). If the inserts are larger (B), an auxiliary conveyor takes over the printed products for the placement of the inserts. Such placement of inserts (B) into printed products (P) is simple and can, in particular, be implemented with conventional device components and easily integrated into existing equipment.

Abstract: In order to prevent lifting-up of a roll body, facilitate throwing-in of the roll body, make defects less liable to occur, and reliably make a drawing-out angle of a continuous sheet acute, a continuous sheet processing apparatus 1 comprises a main body portion 2 having a roll body accommodating chamber 20 and a roll body inlet 21; a door portion 3 for opening and closing the roll body inlet 21; a guide portion 4 disposed on one side with respect to a center reference line L orthogonal to a center axis line O of the roll body A accommodated in the roll body accommodating chamber 20, for holding from another side a drawn-out portion A2 of a continuous sheet A1 drawn out of a portion on the one side with respect to the center reference line L; and a processing portion 5 disposed on the another side with respect to the center reference line L, for processing the continuous sheet A1, a guide portion moving means 6 is provided for moving the guide portion 4 between a first position at which the guide portion 4 hol

Abstract: A product orienting apparatus for orienting a product according to the present invention comprises a table comprising a rotatable device. The table has a table surface comprising at least a first surface area being provided by the rotatable device. The device is rotatable about an axis substantially perpendicular to the table surface. The table also has an array of substantially identical spherical rollers, each spherical roller being suitable for contacting the product at a first contacting point of the spherical roller and for contacting the table surface with a second contacting point of the spherical roller. The array of spherical rollers comprises a first group of spherical rollers contacting the surface area of the device with their second contacting point thereby enabling to convert a rotation of the device into rotation of a product contacting the spherical rollers of the first group of spherical rollers. The table furthermore has a plate having an aperture encompassing the rotatable device.

Abstract: A drive control method for a sheet processing machine includes the steps of operating a driving motor of a sheet feed device which feeds a sheet to a sheet processing device that processes the sheet, in synchronism with a rotary member of the sheet processing device, and adjusting a rotary phase of the rotary member of the sheet processing device and a rotary phase of the driving motor of the sheet feed device relative to each other. A drive control apparatus is also disclosed.

Abstract: In a position adjusting method for an adjustment target portion in a sheet processing machine including a pile board which is lifted and lowered with a sheet stacked thereon, and the adjustment target portion a position of which is adjusted in accordance with a size of the sheet on the pile board, the pile board is lifted with the sheet stacked thereon, and the adjustment target portion is moved in a direction to further separate from a center of the sheet on the pile board as the pile board is lifted. A position adjusting apparatus is also disclosed.

Abstract: A card collection mechanism may include a card collection box for collecting a card, a feeding roller for carrying the card from a feeding passage to the card collection box, and a guide part for guiding the card to the card collection box. The guide part guides the card while the guide part causes the card to be resiliently bent in a direction where an urging force directed to a surface of the feeding roller is applied to the card when the card is fed to the card collection box, and the feeding roller carries the card to a state in which the card is capable of being collected in the card collection box. The card collection mechanism may be used in a card issuing device having a card issuing part.

Abstract: In a mail processing machine having a receive deck for receiving a stack of mail items for printing, jogging means for jogging the stack of items against a reference wall, selection means for extracting mail items for printing one by one from stack of items, and print means for printing a postal imprint on the selected mail item, a jogging device is provided that includes an external strip slidably mounted on a moving slideway and having a jogging flat mounted at the terminal end thereof, a brake-forming friction shoe secured to the stationary slideway and mounted between the stationary slideway and the moving slideway, and a resilient element having one end connected to the moving slideway and its other end connected to the external strip in order to cause the external strip to back off automatically through a determined distance from the moving slideway once the jogging flap has been brought into contact with the stack of mail items.

Abstract: In an electrophotographic printing apparatus for printing an image to an image transfer sheet medium by producing a latent image on a photosensitive unit and transferring the latent image to the image transfer sheet medium, a width-directional position of the image transfer sheet medium is detected before the latent image is produced and the same after the latent image is produced on the photosensitive unit by the width-directional positional sensor, and the detection results are compared with one another; and it is determined from the comparison result whether or not printing operation is continued.

Abstract: A paper feeding unit and an image forming apparatus having the same capable of maintaining a constant paper feeding force regardless of a size of paper. The image forming apparatus includes a main body, a printing unit provided in the main body to form an image on paper, a paper feeding unit to supply the paper into the main body, and a force adjusting unit. The paper feeding unit includes a paper feeding cassette to load paper therein, a knock-up plate to guide the paper loaded in the paper feeding cassette to a pickup device, an elastic member to elastically bias the knock-up plate toward the pickup device, and guide sides provided at both sides of the knock-up plate. The guide sides are adjusted along a distance therebetween according to a width of the paper. The force adjusting unit adjusts an elastic force of the elastic member when the distance between the guide sides is adjusted according to a size of the paper.

Abstract: An image forming apparatus is provided. The image forming apparatus includes a body comprising a conveyance path into which a sheet is conveyed and a feed tray. The feed tray includes a separation pad, which is provided at a widthwise center of the feed tray; and a holding member, which is provided downstream of the separation pad in a direction of conveyance of the sheet, the holding member comprising a driven roller, which is wider than the separation pad, and at least two guide members, one guide member arranged on each side of the driven roller.

Abstract: There is provided a technique in which a retracting operation of a bundle of sheets from a stapler after a staple process can be stably performed irrespective of the number of sheets constituting the bundle of sheets or the transport resistance. When the bundle of sheets subjected to the staple process is moved by a stacker in a direction of retracting from the stapler, an alignment roller is caused to come in contact with the bundle of sheets held by the stacker and to assist the movement of the bundle of sheet.

Abstract: A mailpiece fabrication system including a source for providing sheet material having mailpiece data printed thereon. The mailpiece fabrication system further includes at least one spatial positioning device adapted to direct the sheet material along one of two fabrication paths. Each fabrication path includes a fabrication assembly for producing one of at least two mailpiece configurations. In one embodiment, the spatial positioning device includes an orbiting nip roller for changing the elevation of the sheet material while, furthermore, providing an accurate and controlled mechanism for stacking and aligning sheet material to produce a flats mailpiece. In another embodiment, the spatial positioning device includes a routing roller in combination with the orbit nip roller to change the orientation of the sheet material. The routing roller is employed to change the direction of the sheet material relative to the feed path.

Abstract: Provided is a sheet delivery apparatus for delivering a sheet to a delivery tray, including: a pair of delivery rotary members for nipping and delivering the sheet guided by the guide portion; and a projection that rotates about an axis being the same as an axis of one of the pair of delivery rotary members, is abutted against a trailing end of the sheet, and pushes out the trailing end of the sheet toward a delivery tray side. The guide portion deforms the sheet so that the sheet does not contact the projection, and after the trailing end of the sheet has passed through the guide portion, the projection and the trailing end of the sheet are abutted against each other.

Abstract: A sheet conveying device that facilitates solution of a jam of a sheet and which is capable of inhibiting shortening of life due to a jam is provided. A sheet having a bent leading end that is very likely to jam is positively made to jam at a blocking portion formed on an upstream side of an image forming station in a sheet conveying direction thereof. Consequently, it is possible to more easily perform an operation of solving a jam than in a case where a jam of the sheet occurs in the image forming station. Moreover, it is possible to prevent deterioration of the image forming station due to a jam, and inhibit shortening of the life of the image forming station resulting from a jam.

Abstract: The present invention has been made to provide an image forming apparatus capable of suppressing occurrence of a problem caused by misalignment of the feeding speed at the time of delivery and receipt in the intermediate feeding roller with a simple configuration without increasing cost. The image forming apparatus according to the present invention comprises a drive controller 101 that controls the drive speed of an intermediate feeding roller 38 that feeds a sheet to a regist roller 37 that performs skew correction for the sheet, and a feeding speed information acquisition section 102 that acquires information relating to the feeding speed of the sheet to be fed to the intermediate feeding roller 38. The drive controller 101 drives the intermediate feeding roller 38 at least three different speeds based on the information relating to the feeding speed acquired by the feeding speed information acquisition section 102.

Abstract: A sheet conveying apparatus for conveying a sheet to an image forming portion has a first aligning member for effecting the alignment of the sheet with one of the opposite side edges of the sheet parallel to a sheet conveying direction as a reference, a second aligning member for effecting the alignment of the sheet with the leading edge of the sheet orthogonal to the sheet conveying direction as a reference, and an aligning operation controlling device for selectively operating one of the first aligning member and the second aligning member on the basis of at least one of image information, sheet information and sheet processing information.

Abstract: An image forming member has a first sheet conveying member arranged at upstream side of a sheet conveying path of a sheet material, a second sheet conveying member arranged at downstream side of said sheet conveying path, a guide member which is provided between the first and the second sheet conveying members and guides the sheet material and a movable portion which is provided in the guide member and executes front-and-far-side adjustment of the sheet material by moving a portion against which the tip of sheet material is abutted in parallel to a sheet width direction perpendicular to a conveying direction.

Abstract: A sheet-feeding device includes a tray for holding sheet media of various widths and a shaft extending across the tray. A plurality of pick assemblies is mounted to the shaft. The pick assemblies are spaced along the shaft so that one or more of the pick assemblies contact sheet media in the tray depending on the width of the sheet media. Furthermore, the spacing of the pick assemblies is such that the pick assemblies in contact with the sheet media define a total offset relative to the centerline of the sheet media that is sufficiently small enough to avoid skewing of sheet media for a variety of different media widths.

Abstract: An automatic document feeder with a drive system that can efficiently handle double-side scanning and accommodate more than one timing sequence for sequentially picking individual sheets from a stack using only two motors—a pick motor and a media motor. The automatic document feeder includes a pickup unit with a pick roller, a set of de-skew rollers, a main media path configured to guide a media sheet from the pickup unit to a scanning region and from the scanning region to an output tray, and a switch-back path configured to guide the media sheet back into the main media path. The drive system is operable to provide a high-speed picking mode and a delayed picking mode. In the high-speed picking mode, the pickup unit is driven by the pick motor to pull a subsequent media sheet from a stack of media sheet as soon as a previously pulled media sheet has passed the pick roller.

Abstract: The present invention relates to an apparatus for the alignment of a stack of sheets comprising at least one pair of trimming elements (2, 14) which can be adjusted at distances relative to each other in a preferably continuous manner in order to accommodate and align the stack between said trimming elements (2, 14) An object of the present invention is to disclose an apparatus which permits the centered stack alignment in an inexpensive, reproducible and reliable manner, preferably occurring in transverse, as well as in longitudinal, direction, even when sheets are expected to be duplex-printed. In accordance with the present invention, the trimming elements (2, 14) are coupled to allow their counter-directional movement with respect to each other, in that an automatic stop means (4) preventing an enlargement of the distance between the trimming elements (2, 14) is provided, and in that this stop means (4) can be deactivated if required.

Abstract: A sheet-conveying device includes a sheet conveying path along which a sheet is conveyed, a conveying roller, an inclined roller, an inclined-roller-supporting member that supports the inclined roller such that the inclined roller can rotate around a rotational axis that is inclined with respect to a rotational axis of the conveying roller, and a sheet contact member having a contact surface with which an edge portion of the sheet comes into contact. The inclined-roller-supporting member moves between a position where the inclined roller comes into pressure contact with the conveying roller and a position where the inclined roller is separated from the conveying roller. The sheet contact member moves between a position where the edge portion of the sheet can come into contact with the contact surface and a position where the contact surface cannot restrict the position of the edge portion of the sheet.

Abstract: An oblique feeding roller and a reference guide are provided on a re-conveying path for conveying a sheet in which an image has been formed on one side by an image forming unit to the image forming unit again. The sheet is obliquely fed by the oblique feeding roller. A side edge of the sheet abuts to a reference surface provided for the reference guide along a sheet conveying direction, thereby correcting the oblique motion and a positional deviation of the sheet. The reference guide is moved to a position according to a length in a width direction of the sheet which is conveyed by a movement of a cam.

Abstract: A sheet conveying apparatus includes: a sheet conveyance path designed so as to include nonlinear portions; a first conveyance roller pair which is provided at predetermined positions of the sheet conveyance path and which has a conveyance width capable of nipping and conveying a sheet having the minimum size sheet passing width among sheets to be passed through the sheet conveying apparatus; a guide plate which is placed in a downstream side or an upstream side of the first conveyance roller pair in a sheet conveyance direction and has a curved guide surface; and a plurality of guide ribs which are extended on the guide surface in the sheet conveyance direction and are provided in a sheet passing width direction of the sheet in a region corresponding to the conveyance width of the first conveyance roller pair.

Abstract: In a sheet aligning device, a pair of first rollers provided upstream of a stopper unit moves a sheet in an axial direction thereof after a pair of second rollers provided upstream of the first rollers is separated, and is returned to its home position just after the sheet passes therethrough.

Abstract: The present invention provides a sheet feeder apparatus in which a regulating member can securely be fixed without generating lateral slip of a sheet and an image forming apparatus. The regulating member regulates a sheet position in a width direction, and a fixing portion fixes the regulating member to a position according to a sheet size. The fixing portion includes plural rack gears which are provided in a surface opposite a surface abutting on the sheet of the regulating member; plural relay gears which engage the plural rack gears; a rotating shaft on which the plural relay gears are provided; and a lock mechanism which regulates rotation of the rotating shaft when the regulating member is moved away from the regulated sheet, the lock mechanism permitting the rotation of the rotating shaft when the regulating member is moved in a direction in which the regulating member contacts the regulated sheet.

Abstract: A document feeding device includes an upstream guide member that forms an upstream side of a document conveying path along which a document is guided from a sheet feeding tray to a platen, and a downstream guide member located between the upstream guide member and the platen. The document feeding device has a guide moving mechanism that slidably moves the downstream guide member away from an opposite guide member located opposite the downstream guide member upon a pivoting operation of the upstream guide member. Consequently, even if the document conveyed toward the platen is, for example, inappropriately conveyed to cause jamming, the document can be easily removed without being damaged.

Abstract: Systems and methods for positioning a sheet in a feed path including at least one sheet drive roller driven in a rotational direction by a drive shaft in which the drive shaft translates in a lengthwise direction along the axis of the drive shaft. A power shaft rotates about the same axis as the drive shaft and is driven by a power source that is fixedly mounted in the system. The power shaft is fixed to the drive shaft by a flexible coupling that allows the drive shaft and the power shaft to move relative to one another in the lengthwise direction along the axis while maintaining corresponding rotational motion between the power shaft and the drive shaft.

Abstract: The presently described embodiments are directed to a method and system for improving sheet registration in a document processing device. The presently described embodiments implement a technique the produces accurate results with merely a small tail wag. To do so, the method ultimately establishes or determines a variety of parameters (e.g. lateral position of a sheet, skew, registration time, nominal sheet velocity, and correction velocity). These parameters are then used by the system to calculate a lateral velocity profile. In this regard, the calculated velocity profiles are applied to the wheels or nips, in the paper path. Thus, the wheels can be controlled and will allow for improved sheet registration in the document processing device.

Abstract: Provided is a sheet conveying apparatus including: a first sheet conveying rotary member; a second sheet conveying rotary member provided upstream of the first sheet conveying rotary member; and a third sheet conveying rotary member provided upstream of the second sheet conveying rotary member, in which: the first sheet conveying rotary member, the second sheet conveying rotary member, and the third sheet conveying rotary member can convey the same sheet at the same time; a relationship between a peripheral speed V1 of the first sheet conveying rotary member, a peripheral speed V2 of the second sheet conveying rotary member, and a peripheral speed V3 of the third sheet conveying rotary member is V3>V1>V2; and a velocity of a sheet at a portion where the sheet is ejected from the second sheet conveying rotary member is equal to or lower than the peripheral speed of the first sheet conveying rotary member.

Abstract: A decurler to decurl a curled printing media being transported into a release area, the decurler comprising: a) at least one guide arm against which the printing media presses, positioned and adapted to bend the printing media along an axis substantially in a direction of transport thereof; and b) a hinge on which the guide arm is mounted, the hinge being oriented at an angle of between 0.25 degrees and 20 degrees from vertical, wherein a reaction force that the guide arm exerts on the printing media is suitable for decurling the printing media. Another deculer with a flexible strip which hangs down and presses against a middle portion of the printing media.

Abstract: A sheet conveying device includes entrance rollers and registration rollers. The entrance rollers convey a sheet received from delivery rollers to the registration rollers. The registration rollers correct skew of the sheet. A conveying path between the delivery rollers and the registration rollers is equal to or slightly longer than a length of a sheet in a maximum allowable size for skew correction in a conveying direction in which the sheet is conveyed on the conveying path.

Abstract: A sheet processing apparatus has: a plurality of conveying paths which convey sheets; and front and back aligning members which perform width alignment in the direction which crosses the sheet conveying direction of the sheets conveyed from the conveying paths. Standby positions when the front and back aligning members approach side edges of the sheets from the standby positions and perform the width alignment of the sheets at the width aligning position are made different every sheet on the basis of discharge position information of the sheets to the plurality of conveying paths.

Abstract: A sheet material information-detecting apparatus is provided which is capable of detecting the type of a sheet material even if the sheet material is anisotropic. When recording paper sheet P is fed, feed rollers 1a and 1b are moved to narrow the nip of the rollers and front edge of recording paper sheet is pushed thereto to correct the oblique feed. Thereafter, external force is applied to recording paper sheet P by external force applying member 2. A signal based on the external force is detected by signal detecting means 3, and sheet material information-acquiring means 5 identify the type of the recording paper sheet. Owing to the oblique feed correction, the type of the sheet material can be identified precisely even if the sheet material is anisotropic.