Abstract: An adjustable force driving nip assembly for use in a sheet transport system of a document creating apparatus has a plurality of adjustable force driving nips aligned and spaced transversely across the sheet travelling path of the sheet transport system. Each driving nip has a spring biased idler roller mounted on a cam follower and mated with a driven roller. The spring bias produces a normal force for the idler roller that urges the idler roller against the driven roller. A stepper motor is adapted to interact concurrently with the cam followers and, upon actuation, vary the force of the spring thus adjusting the normal force of the idler rollers. A controller actuates the stepper motor in response to sheet media data entered into a control panel of the document creating apparatus by an end user, thereby automatically adjusting the normal force of the idler rollers to prevent sheet marking.

Abstract: A liquid ejection head is operable to eject a liquid droplet toward a medium at a liquid ejection point A first roller transports the medium toward the liquid ejection point. A second roller ejects the medium transported from the liquid ejection point to the outside of the apparatus. At least one detection roller is directly brought into contact with the medium and is rotated in accordance with the transportation of the medium, the at least one detection roller being disposed in the vicinity of at least one of the first roller and the second roller. A detector detects a rotation amount of the detection roller. A controller controls the transportation of the medium in accordance with the rotation amount.

Abstract: An image recording apparatus includes a record unit; a first roller provided upstream of the record unit; a second roller provided downstream of the record unit; a motor which drives the first and second rollers; a first drive signal generation unit which generates a first drive signal based on a first rotation amount of the first roller and a first target rotation amount; a correction value generation unit which generates a correction value based on the first rotation amount and a second rotation amount of the second roller; a target value generation unit which generates a second target rotation amount based on the first target rotation amount and the correction value; a second drive signal generation unit which generates a second drive signal based on the second target rotation amount and the second rotation amount; and a controller which controls the motor by the first drive signal until a conveyed sheet reaches a position and controls the motor by the second drive signal thereafter.

Abstract: A spring is bridged between a pair of press levers, and a pair of driven rollers is pressurized uniformly, so that clamping and conveying force of the sheet of paper P on the front side and rear side by conveying rollers and the driven rollers is made equal such as Pf=Pr, the sheet of paper P are prevented from being skewed, while the sheet of paper P are clamped and conveyed by a conveying device, and the good conveying of the sheet of paper P is improved, thus the image quality is improved.

Abstract: In an embodiment of the invention, a cam of a pitch adjustment mechanism can be slid and moved along a first shaft. When a sheet is a standard paper, the pitch adjustment mechanism is ejected from an adjustment position by an urging force of a movement spring and is moved to a standby position, and slide contact between the cam and a second shaft is released. When a sheet is a thick paper, a solenoid is turned on, the pitch adjustment mechanism is disposed at the adjustment position by a plunger, and it is prevented that the registration roller pair abruptly come in contact with each other after the thick paper passes through.

Abstract: A bill handling machine according to one embodiment of the invention is provided with a casing having a bill insertion slot provided on a front face of the casing to enable a bill to be inserted therein; a bill feeding device having a feeding belt wound at opposite ends around at least tension rollers provided on the upstream and downstream sides respectively along the bill insertion direction, and pinch rollers in contact with the tension rollers on the upstream and downstream sides, to feed the bill inserted from the bill insertion slot along the bill insertion direction. The distance between the pinch rollers in contact with the respective tension rollers on the upstream and downstream sides is set to be shorter than the distance between the tension rollers on the upstream and downstream sides.

Abstract: The conveying device of the present invention comprises a cylindrical first roller, a cylindrical second roller that has a surface hardness higher than a surface hardness of the first roller, and a belt placed in a state surrounding either the first roller or the second roller. The conveying device moves an object to be conveyed by bringing the first roller and the second roller in pressure contact with each other via the belt and making the object pass through a nip portion formed of the belt and the first roller or the second roller facing the belt. A length in a lengthwise direction of an outer peripheral portion of the first roller is shorter than a length in a lengthwise direction of an outer peripheral portion of the second roller.

Abstract: A posture control device has a posture detecting section, an upstream conveying section, a posture control section, and a downstream conveying section along a conveying path for mail items. The distance from a nip of the upstream conveying section and a nip of the posture control section (D-E distance) is designed to be substantially as long as the longest one of the mail items to be processed by the device which has the greatest length along a conveying direction. The distance from the nip of the posture control section and a nip of the downstream conveying section (E-F distance) is designed to be slightly longer the shortest one of the mail items to be processed by the device which has the shortest length along the conveying direction.

Abstract: In an image recording apparatus, a feed roller pair including a drive roller and a pinch roller is disposed on an upstream side of a sheet feed direction from an image recording unit. The pinch roller is rotatably supported in a pinch roller holder so as to press in contact with drive roller with a specified pressure. A holder support member is integrally formed with an inside frame constituting a housing of the apparatus. Rolling bearings are interposed between the pinch roller holder and the holder support member. The pinch roller holder is supported in the holder support member so as to roll in a direction where a recording sheet is fed.

Abstract: Embodiments of example apparatuses and methods for changing nip pressure are described.

Abstract: In a recording medium conveyance device for conveying a recording medium gripped between a conveyance roller which is driven by a driving device and has a number of protrusions provided on its surface and a pressing roller arranged opposite to the conveyance roller, there is further provided with a pressing force varying device for varying the pressing force of the pressing roller acting on the recording medium, wherein the recording medium conveyance device varies the conveyance amount of the recording medium by varying the penetration amount of the protrusions into the recording medium through varying the pressing force of the pressing roller by the pressing force varying device.

Abstract: A recording apparatus for effecting recording by a recording head on a recording material which is fed by a plurality of pairs of feeding rollers, the recording apparatus, includes a first feeding roller for feeding the recording material with a first feeding force; a second feeding roller for feeding the recording material with a second feeding force which is smaller than the first feeding force; control means for stopping the first feeding roller with a sheet material nipped to cause rubbing between the second feeding roller and the sheet material to effect cleaning to a peripheral surface of the second feeding roller.

Abstract: An image forming apparatus includes an image forming unit, a platen, a transporting device, and a suction device. The image forming unit forms an image on one surface of a printing medium. The transporting device transports the printing medium in a transportation direction along the platen while the other surface of the printing medium faces a surface of the platen. The suction device sucks air. The platen includes a plurality of rollers, which are rotatable around rotation axes perpendicular to the transportation direction and protrude from the surface of the platen, and a suction opening which is defined on the surface of the platen and communicates with the suction device.

Abstract: A medium conveying apparatus has: a conveying roller shaft arranged so as to be movable vertically; a pressing member which presses the conveying roller shaft in plural positions; and an urging member which urges the pressing member toward a conveying path of a medium. The whole pressing member is pushed up when the medium is inserted and a part of the pressing member is pushed up. Since the pressing member presses the conveying roller shaft in the medium width direction with a uniform pressing force, the uniform pressing force is applied to the medium in the width direction. The occurrence of a variation in the conveying forces and the occurrence of the oblique movement of the medium can be avoided. The medium can be stabilized and conveyed with the sufficient conveying force.

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: An apparatus for conveying a substrate or sheet through a printing machine comprises a drive roller and a baffle assembly forming a path for the substrate past the drive roller. The baffle assembly includes an idler roller having an axle rotatably supported within the baffle assembly to cooperate with the drive roller to exert a nip force on the substrate. A nip spring connected to the baffle assembly bears against a bushing carrying the idler roller axle to exert a nip force on the idler roller. A nip force adjustment apparatus is mounted within the baffle assembly and is operable to apply an adjustment force on the bushing of the idler roller to augment the nip force generated by the nip spring.

Abstract: A sheet-feeding mechanism of a printer conveys a recording sheet nipped between a first sheet-feeding roller and a first pressing roller towards a thermal head. At the start of a printing operation, a second pressing roller is disposed distant from a second sheet-feeding roller. When a front end of the recording sheet being printed is conveyed to a space between the second sheet-feeding roller and the second pressing roller disposed distant from each other, the second pressing roller gradually comes into press-contact with the recording sheet such that the recording sheet being printed is conveyed downstream by at least a second sheet-feeding unit. The first pressing roller is gradually shifted away from the recording sheet before a rear end of the recording sheet being printed is released from the nip between the first sheet-feeding roller and the first pressing roller.

Abstract: An ATM includes a currency note dispenser having a currency cassette, a note picker, a note transporter, and a note presenter. A cassette tambour door automatically opens during insertion of the cassette into the dispenser. The picker can pick notes through the opening. A spring loaded housing wall tab retains the picker shaft in mating connection with a drive pin. The transporter can move notes vertically and horizontally. The transporter includes belts between an idle shaft and a drive shaft. The idle shaft is vertically movable relative to a drive shaft to maintain belt tension. The transporter also includes convexly tapered rollers that automatically recenter a loose belt. A presenter gate is at a note dispensing outlet of the ATM. The gate is opened by actuating a lever linked with an arm connected to the gate. The gate opens by moving a pin upward in an angled slot.

Abstract: A discharge system for printed media sheets and a printer which utilizes such a discharge system, the discharge system including a tray for the media sheets; rotating transport elements forming a discharge nip for discharging the sheets onto the tray; a guide plate having a surface for guiding the sheets to the discharge nip; and a rotating wheel containing bristles for guiding the sheets towards the discharge nip; the wheel facing said surface of the guide plate. At least one driven transport belt forms one of the transport elements defining the discharge nip, and the guide plate passes in approximately a one-half turn around two pulleys around which the transport belt is passed.

Abstract: A method and apparatus for moving media through an image forming device using a roller having a recessed kick area is described herein. The roller includes a contact surface having a first radius that extends 360° around the roller. The roller also includes at least one recess that extends inwardly from the contact surface along a sector of the roller, where a bottom surface of the recess has a second radius less than the first radius. As a result, along the sector of the roller having the recess, the width of the contact surface is less than the width of the roller. The recess comprises at least one kick surface on one end of the recess. As the roller rotates, the kick surface kicks a trailing edge of media exiting the exit roller system into a desired bin of the image forming device.

Abstract: The sheet conveyance apparatus includes a controller which controls a moving unit. The moving unit moves a sheet conveyance unit for conveying a sheet toward a direction intersecting with a sheet conveyance direction. The controller performs the control such that a moving speed of a shift moving unit is reduced when a shift amount of the sheet discharged from an image forming apparatus main body is small. Therefore, generation of a noise and vibration can be suppressed to save electric power consumption. When the shift amount of the sheet is large, the moving speed of the shift moving unit can be increased to shorten an operation time necessary to the movement.

Abstract: There is provided a feed roller that includes a feed drive roller and a teeth roller drivenly rotated by making contact with the feed drive roller, wherein the circumferential surface of the feed drive roller is equipped with a groove with which a part of the teeth roller makes contact.

Abstract: Various embodiments and methods relating to a media drive are disclosed.

Abstract: The invention provides a transportation apparatus for transporting a transportation target medium in a predetermined transportation direction. The transportation target medium transportation apparatus according to an aspect of the invention includes: a transport driving roller that is operated rotationally; a transport driven roller that is urged against the transport driving roller and follows the rotary movement of the transport driving roller; and a control unit that controls the movement of the transport driven roller between a contact position at which the transport driven roller is in contact with the transport driving roller and a non-contact position at which the transport driven roller is not in contact with the transport driving roller.

Abstract: A data processing apparatus having a construction for guiding a transported medium conveyed from a curved transportation unit enables opening and closing the guide unit. The data processing apparatus 1 has an intermediate roller 39 and guide portion 38 constituting a curved transportation unit 23 inside the printer case 7, and a paper feed roller pair 25 and 26 for nipping and conveying paper P conveyed from the curved transportation unit 23 disposed a specific distance from the curved transportation unit 23. The guide portion 38 has an auxiliary guide member 51 and can move circularly open and closed in unison with an outside wall unit 16. The auxiliary guide member 51 projects toward the paper feed roller pair 25 and 26 and guides the paper P. An auxiliary guide linking mechanism 53 causes the auxiliary guide member 51 to retract away from the paper feed roller pair 25 and 26 in conjunction with the unlocking operation of opening/closing levers 41 and 42.

Abstract: A conveyor apparatus includes a receiving clearance adjustment mechanism for adjusting the vertical clearance between portions of downstream-side upper belts, the portion being located furthest upstream with respect to the conveyance direction of signatures, and upstream-side lower belts. The conveyor apparatus also includes a separation start position adjustment mechanism for adjusting a position at which upstream-side upper belts start to separate away from a signature. The conveyer apparatus can convey sheets, while properly transferring them between upstream-side belts to downstream-side belts, without generation of unintended positional shift, even when changes arise in the thickness and/or length of the sheets.

Abstract: A taped bag feeder having a housing with a bag guide positioned thereon, a drive mechanism, a first reel and second reel for supplying an assembly of imbricated taped bags to a packaging operation. The assembly of imbricated taped bags having a pair of tape strands connected to the first and second reels which are rotated by the drive mechanism thereby advancing the assembly. The first and second reels being disposed on a face of the bag feeder parallel to and spaced from a longitudinal axis defined by an upstream end and downstream end of the bag guide.

Abstract: A sheet transport apparatus which includes a sheet transport path for transporting a sheet, and a regulation member. The regulation member is provided in the sheet transport path, and is brought into contact with a swelling portion occurring on a surface of an envelope in the event that the envelope is transported as the sheet, such that the swelling portion can be pressed.

Abstract: A slip-sheet compactor for an imaging device with automatic media handling capabilities provides a two-stage compaction for a slipsheet removed from a media sheet to be imaged. A pair of rollers advances the slipsheet into a pre-compression chamber effecting a first compression or folding operation. In a second compression, a plunger sweeps the pre-compression chamber, which is narrowed towards an exit aperture thus effecting a second compression on the slipsheet material.

Abstract: An image reading device includes a main body and an openable cover. A sheet feed path is defined inside the cover. An intermediate portion of the sheet feed path is exposed to the top surface of the main body, thereby the top surface defines a part of the sheet feed path at the intermediate portion. The cover is provided with a sheet feed mechanism. Feeding of the sheet is terminated when the cover is opened. The image reading device further includes a sheet location detection system that detects a location of the sheet when the feeding of the sheet is terminated, and a controller determines whether the sheet is to be discharged from the sheet feed path, when the cover is closed, in accordance with a location of the sheet detected by the sheet location detection system.

Abstract: Disclosed is a currency note feeding apparatus for a currency note handling machine capable of stably feeding currency note by use of a single belt guiding upper and lower surfaces of the currency note, and driving upper and lower belts of the single belt by use of one motor.

Abstract: The object is to provide an image forming apparatus in which the copy sheet can be transferred with stable velocity and high accuracy even if there is variation in diameter due to machining tolerance. A pair of roller for feeding copy sheet pinching the sheet between the rollers consists of a rigid roller and an elastic roller which is pressed against the rigid roller, and both the rollers are connected by means of a driving mechanism so that the peripheral velocity of both the rollers are essentially equal.

Abstract: A sheet conveyor includes a first roller and a second roller pressurized to the first roller to hold and convey a sheet, wherein when the sheet is held between the first roller and the second roller, the first roller and second roller are separated at a space equivalent to a thickness of the sheet. The sheet conveyor has a pressurizing delay mechanism configured to bring slowly the first roller and the second roller into contact with each other after the sheet is conveyed from the first roller and the second roller.

Abstract: In a thermally transcribing printer including a frame, a roller made of a metal for feeding sheet at constant speed, a gear made of a resin, a motor, a press-fit engaging member, and a compression coil spring, the roller includes a shaft portion attached to project from an inner side to an outer side of the frame 1 and the press-fit engaging member is press-fitted to the shaft portion. Further, the gear includes a shaft inserting hole in a circular shape inserted from an outer side of the press-fitted engaging member made of a metal into a shaft portion of the roller, and four second engaging portions provided at intervals of 90 degrees between the shaft inserting hole and an outer peripheral portion of the gear and having a predetermined length in a rotational direction.

Abstract: A feeding device for feeding a recording medium in a feed direction, including: a drive roller having an annular recess; and a driven roller rotatably held and positioned such that a radially outer end portion of the driven roller is positioned within the annular recess of the drive roller. The driven roller is displaceable away from the drive roller, so that the recording medium is fed to pass between the drive and driven rollers, with the recording medium being gripped by the radially outer end portion of the driven roller and the radially outer end portion of the drive roller.

Abstract: A passbook conveyance roller device comprises a conveyance roller and a pinch roller, which are arranged to be opposed to each other, to convey a passbook. The conveyance roller comprises an inner ring member connected to a drive shaft, a metallic outer ring member, and a rubber member fixed to, for example, an outer peripheral surface of the inner ring member and press fitted into an inner peripheral surface of the outer ring member to give elastic forces to the inner peripheral surface of the outer ring member in a plurality of positions, which are spaced circumferentially at predetermined intervals from one another and arranged in point symmetry. Both the inner ring member and the outer ring member are rotated through the elastic member when a load torque on the outer ring member is less than a set torque set by the elastic forces of the rubber member.

Abstract: Parallel printing systems and methods incorporate inverter assemblies for not only inverting media during transport through the system but also to register the media and to provide a velocity buffer transport with different drive velocities. The inverter assemblies can include the capability to optionally deskew the media while providing lateral (cross-process) registration corrections. The method comprises simultaneously combining the inverting function selectively with deskewing, side registering, and/or velocity buffering functions.

Abstract: An auxiliary scanning feed mechanism has a pair of curved feed guides for guiding a stimulable phosphor sheet along a curved feed path, and first and second roller pairs rotatable in synchronism with each other for gripping and feeding the stimulable phosphor sheet along the curved feed path. The first and second roller pairs have respective first and second drive rollers disposed inwardly of respective curved sections of the curved feed guides and respective first and second driven rollers.

Abstract: An ATM includes a currency note dispenser having a currency cassette, a note picker, a note transporter, and a note presenter. A cassette tambour door automatically opens during insertion of the cassette into the dispenser. The picker can pick notes through the opening. A spring loaded housing wall tab retains the picker shaft in mating connection with a drive pin. The transporter can move notes vertically and horizontally. The transporter includes belts between an idle shaft and a drive shaft. The idle shaft is vertically movable relative to a drive shaft to maintain belt tension. The transporter also includes convexly tapered rollers that automatically recenter a loose belt. A presenter gate is at a note dispensing outlet of the ATM. The gate is opened by actuating a lever linked with an arm connected to the gate. The gate opens by moving a pin upward in an angled slot.

Abstract: A drive roller and the follower roller defines a nip line therebetween. A recording medium has a leading edge provided with a first corner contactable with the drive roller and a second corner contactable with the follower roller at a contact line when the drive roller and the follower roller provide the nip line. A supporting unit supports the follower roller and is capable of retracting the follower roller away from the nip line in a retracting plane. The retracting plane contains the axis of the follower roller. An angle ?1 and ?2 greater than the angle ?1 is defined between the retracting plane and an imaginary plane that contains the axes of the drive roller and follower roller. The supporting unit allows the follower roller to be retracted in a downstream side of the paper conveying direction with respect to the imaginary plane. The angle ?1 is greater than an angle ? defined between the imaginary plane and a radial plane passing through the second axis and the contact line.

Abstract: In a sheet feeder of the present invention, a groove-shaped concave provided on an inner surface of a bearing extends therethrough in a direction where a rotational shaft of a feed roller extends. A surface of the rotational shaft of the feed roller is supported on a pair of outer edges of the groove-shaped concave formed on the inner surface of the bearing. A bottom of the groove-shaped concave is substantially circular-arc and concentric with the inner surface of the bearing other than the groove-shaped concave. The bottom of the groove-shaped concave is formed at such a depth that the surface of the rotational shaft of the feed roller does not contact the bottom while the rotational shaft of the feed roller is supported on the outer edges of the groove-shaped concave.

Abstract: Feeding roller pairs are respectively constituted of a capstan roller and a nip roller. The nip roller is movable between a nip position and a release position. When movement timing of the nip rollers overlap, a pulse motor for moving the nip rollers is successively driven. For example, a drive-pulse speed for the pulse motor is detected at the moment that the downstream nip roller is moved to the nip position (at the moment that a predetermined time has passed after detecting a recording-paper sheet with a position sensor). And then, the drive-pulse speed is changed in accordance with the detected drive-pulse speed to drive the pulse motor at a prescribed speed.

Abstract: An apparatus for transporting flat work pieces has a first conveyor and a second conveyor. An inlet mouth is formed from the first conveyor and the second conveyor. The apparatus is distinguished by a geometry of the inlet mouth which can be optimized with regard to different, jointly assumed pivoting positions of the conveyors.

Abstract: A sheet conveying device includes a metal feed roller driven by a drive source and a plastic pinch roller pressed against the feed roller. A sheet is held between the feed roller and the pinch roller, to convey the sheet to a recording unit. An elastic ring having a high wear resistance is fitted over a part of an outer surface of the pinch roller in a width direction of the pinch roller. Accordingly, the elastic deformation of the elastic ring reduces or absorbs load (impact) that causes a rear end of the sheet to flick or spring and the improper sheet feeding, when the rear end of the sheet passes through a nip portion between the feed roller and the pinch roller. Thus, variances in the sheet feeding amounts and the poor image formation are prevented.

Abstract: In the sheet feeder, a first intermediate gear support shaft is inserted into a bearing of a first intermediate gear, and contains a bearing engaging part including a sectional shape having a substantial D-shaped cut having a flat part and a circular part. The bearing engaging part having a substantial D-shaped cut of the first intermediate gear support shaft contains two support parts and located on the boundary line between the flat part and the circular part. The support parts are arranged so as to support the circular bearing of the first intermediate gear at two positions sloping by a predetermined angle right and left for the line of a force which passes the center of the first intermediate gear and is applied to the first intermediate gear from the rotation. The support parts have a chamfered or rounded shape.

Abstract: A sheet discharging apparatus is constructed of a sorting device and a reversible conveying device. Normal sheets are fed by the sorting device and conveyed in an arrangement in zigzag in two rows and conveyed on a primary path. Near an exit of the primary path, there is a high speed discharging roller pair having a drive roller and a nip roller. Between the drive roller and a drive shaft, there is a frictional connection unit. While the sheet is conveyed by conveying roller pairs, a front edge of the sheet reaches the high speed discharging roller pair, and the drive roller freely rotates due to the effect of the frictional connection unit. When a rear edge of the sheet passes the conveying roller pair, the frictional connection unit is set into a connecting situation, and the sheet is discharged by the drive roller and the nip roller.

Abstract: A discharge roller device includes at least one roller pair, at least one first free roller and at least one second free roller. The roller pair includes a driving roller and a pressure roller pushed against the driving roller. The first free roller is disposed at a side where the driving roller is disposed with respect to a plane including a nip part of the roller pair and a part of the first free roller is located in the pressure roller side rather than the plane. The second free roller is disposed at a side where the pressure roller is disposed with respect to the plane and a part of the second free roller is located in the driving roller side rather than the plane.

Abstract: A sheet processing apparatus comprising a stack means for stacking sheets to be fed; a feeding path comprising guide members for feeding the sheets to the stack means, disposed facing with each other; a discharging means for discharging the sheets to the stack means; and a sheet processing means capable of moving in the sheet width direction for processing the sheets stacked on the stack means at a predetermined position. One of the guide members disposed facing with each other is divided into a plurality of parts in the sheet width direction such that the feeding path can be selectively opened per each part in a space for moving the sheet processing means in a space where the sheet processing means moves.

Abstract: An image reading apparatus which enables the area occupied by the apparatus to be made small and can stably transport even a thick sheet having stiffness. A sheet P contained in an inclined sheet containing portion 3 is transported to image reading portions 8 and 9 by a vertically extending first sheet transporting path R1, and an image on the sheet P is read by the image reading portions 8 and 9, and the sheet P on which the image has been read is delivered to a substantially horizontal delivery stacking portion 14 by a substantially horizontally extending second sheet transporting path R2. The image reading portion 9 is provided between the vertically extending first sheet transporting path R1 and the substantially horizontally extending second sheet transporting path R2, and in the image reading portion 9, the transport direction of the sheet P passed along the first sheet transporting path R1 is changed to a direction toward the second sheet transporting path R2.

Abstract: A sheet transport apparatus includes a transport path for transporting a sheet, and drive and follower roller units disposed in the transport path. The drive roller unit has a drive shaft and at least two drive rollers arranged on the drive shaft in a direction perpendicular to a sheet transport direction. The follower roller unit has a follower shaft and at least two follower rollers contacting the at least two drive rollers. An urging device is attached to the follower shaft for pressing the at least two follower rollers to the at least two drive rollers in a direction with a predetermined angle with respect to the drive shaft.