Abstract: An image forming apparatus is provided with a paper sheet feeder for selective feeding from a group of paper sheets in either a first or second cassette. In the paper sheet feeder, first and second registration rollers are provided in front of the first and second cassettes respectively, and a common registration roller is provided in front of a photosensitive drum. When the first group of paper sheets is selected, a first paper sheet is supplied to the first registration roller from the first cassette so that the paper sheet is registered by the first registration roller. The registered paper sheet is supplied to the common registration roller so that the paper sheet is also registered by the common registration roller. When the second group of paper sheets is selected, the second paper sheet is supplied to the second registration roller from the second cassette so that the paper sheet is registered by the second registration roller.

Abstract: In a time period from the time point where the forward end of a paper sheet fed from a pair of paper separation rollers reaches a registration roller to the time point, where the registration roller is driven, when the load torque exerted on a forward roller is not less than second regulated torque, the transmission of power to the forward roller is released by a torque limiter provided for the forward roller. In this case, therefore, the force of paper feeding produced by the pair of paper separation rollers is regulated. Consequently, a suitable force of paper feeding can be applied to the paper sheet, thereby to make it possible to regulate the paper sheet straight in the direction of paper feeding as well as to prevent the paper sheet from continuing to be fed even if the amount of deflection of the paper sheet is saturated between the pair of paper separation rollers and the registration roller to prevent the paper sheet from being wrinkled.

Abstract: A sheet feeder for a computer driven printer moves a sheet of paper from a supply stack to a holding station at which movement of the sheet of paper is temporarily stopped. Any skew present in the leading edge of the paper is automatically removed by engagement of the leading edge with a pair of spaced bights between opposed rollers before the paper progresses from the holding station to a printing station. One sheet of paper can temporarily remain in the holding station as a previously fed sheet of paper is simultaneously being passed from the holding station to the printing station or it can pass essentially continuously through the holding station on its way to the printing station. Separate motors for driving paper feed rollers and paper drive rollers permit implementation of different algorithms to accomplish this objective.

Abstract: A sheet registering unit for an image forming apparatus in which in the location upstream of the transfer stage, a preregistering roller device and a registering roller device are disposed while being separated with a predetermined distance from each other, and the leading edge of a sheet of paper is positioned with the aid of a loop of the sheet formed in a manner that the leading edge is thrust against the nip of the paired rollers of the registering roller device, and in this state the sheet is additionally pushed by the preregistering roller pair. In the sheet registering unit, the shafts supporting the roller members of the registering roller device or the roller members are supported by the combination of linear bearing members and springs, and by a pressure in the oblique direction caused in the sheet nipped by the registering roller device, the roller members of the registering roller device are shifted in the axial direction.

Abstract: A sheet feeder for stopping a conveyance of a sheet at a registration location. The sheet feeder includes: registration rollers, positioned at a registration location, for stopping a conveyance of a sheet; buckling rollers for conveying the sheet toward the registration rollers, and for conveying the sheet so that said sheet has a pressure contact with the pair of buckling rollers; a photosensor for detecting a leading edge of the sheet at a predetermined location, and for generating an edge detection signal; a driver for releasing the pressure contact of the sheet with the pair of buckling rollers; and a controller for controlling the driver to release said sheet based on the edge detection signal.

Abstract: An accumulator for accumulating sheets of material such as sheets of paper, the sheets being of substantially any length and the accumulation being in substantially any order. The accumulator includes a mechanism for moving a sequence of sheets along a first path until the leading edges of the sheets meet a deflector which deflects the sheets onto a second path. The leading portions of the sheets pass through a retraining mechanism and are stopped by a selectively activatable mechanism such as a gate and successive sheets form an accumation at the stop mechanism. As the feed mechanism continues to feed a sheet after it is stopped, the sheet buckles in a direction determined by the angle between the first and second paths, and as the feed mechanism continues to feed the sheet the buckle grows into a loop which unrolls into a receiver, which may be no more than a space provided.

Abstract: A copying machine in which an image of a document placed on a platen is optically read and transferred on a transfer sheet sent out from a sheet feeding cassette. The temporary stop times of transfer sheets at the registration unit are averaged after transfer sheets in each sheet feeding cassette have been copied. The obtained average is compared with a predetermined reference value. The start of the sheet feeding operation by sheet feeding cassette is advanced in accordance with the result of the comparison.

Abstract: A transport path is branched into a main pass and a bypass. A deflector is provided at a branch point, for switching the path either to the bypass or to the main pass. Sheet detection switches are respectively provided along the bypass and the main pass, and also on a stapler plate, for controlling the rotation of a transfer roller. In this way, a first sheet being transported through the main pass and a second sheet being transported through the bypass can be discharged onto the stapler plate at the same time. As a result, the problem of the device being made larger or reducing the quality of the sheets can be prevented, and a faster process after copying can be achieved.

Abstract: A paper feeding device includes paper feed rollers in a paper hand feed path and a paper feed detection switch in front of the paper feed rollers. A drive section is provided for driving the paper feed rollers. A controller is provided such that the paper feed rollers pinch and hold the leading edge of a hand feed sheet of paper when the paper feed detection switch turns on.

Abstract: In a time period from the time point where the forward end of a paper sheet fed from a pair of paper separation rollers reaches a registration roller to the time point where the registration roller is driven, when the load torque exerted on a forward roller is not less than second regulated torque, the transmission of power to the forward roller is released by a torque limiter provided for the forward roller. In this case, therefore, the force of paper feeding produced by the pair of paper separation rollers is regulated. Consequently, a suitable force of paper feeding can be applied to the paper sheet, thereby to make it possible to regulate the paper sheet straight in the direction of paper feeding as well as to prevent the paper sheet from continuing to be fed even if the amount of deflection of the paper sheet is saturated between the pair of paper separation rollers and the registration roller to prevent the paper sheet from being wrinkled.

Abstract: In a primary paper feeding device, a document is conveyed from a document stock section to a pair of registration rollers by a first conveying device. The document conveyed to the registration rollers is further conveyed forward in a downstream direction by the registration rollers. When the lead (downstream) edge of the document arrives at a predetermined first reference position downstream of the registration rollers, document conveying by the registration rollers terminates. In this way, the document is conveyed such that the trailing edge thereof does not pass through the registration rollers. Thereafter, when a document change signal occurs, the registration rollers again are driven so that the document advances toward a position for document reading.

Abstract: A sheet feeding device used for an image forming device which has a print part, such as the laser printer. A control part drives a separation roller installed under the print part and the paper supplying roller and supplies the printing paper to a resist roller individually. When a predetermined time passes afterwards, the control part drives the resist roller and transports the printing paper to the print part. In this case, a curve part enables miniaturization of the entire device as a result of being installed in a vertical part of the sheet guide.

Abstract: A cut sheet registration device comprises at least two idler rolls biassed into contact with an intermittently-driven feed roll, the idler rolls being pivoted on a bar which is itself pivotable with respect to the axis of the feed roll, so as to adjust the angle which the contact joints of the idler rolls make with the feed roll. The angle of the bar is adjustable at the factory to allow for any misalignment etc. in the downstream sheet-using devices.

Abstract: A laser printer has a circulating photoreceptor belt 20 and a transfer station 4 at which toner images are transferred from the belt to copy sheets. Each copy sheet is registered, upstream of the transfer station 4, in the nip of registration rolls 12 before being fed to the transfer station. The copy sheet is fed to the registration rolls 12 (which at that time are stationary) by feed rolls 13, 14 which continue to rotate so that a buckle is formed in the sheet to assist in removing any de-skew. When the sheet has been registered, the registration rolls 12 are rotated and, initially, are accelerated to a speed about 20% greater than the normal operating speed. That has the effect of decreasing the amount of buckle in the sheet before the trail end of the sheet reaches the registration rolls. When the buckle has been reduced, the speed of the rolls is reduced to the normal operating level, which is typically about the same as the speed of the photoreceptor belt.

Abstract: A method for correcting a direction of a side of a transferred sheet in which according to a first step the sheet is driven forward at a driven portion thereof other than a forward end thereof when a pair of feed rollers contacting with each other to form a contacting line therebetween is rotationally stopped, until the forward end of the sheet contacts with the pair of feed rollers near to the contacting line and a curvature of the sheet is formed between the forward end and the driven portion with a clearance over a guide for the sheet so that a rigidity of the sheet against the curvature thereof generates a pressing force between the forward end of the sheet and the pair of feed rollers.

Abstract: A sheet feeding apparatus having a sheet support for supporting sheets, a rotary sheet supply roller for feeding out the sheets stacked on the sheet support, a rotary feed roller for feeding the sheet in normal and reverse directions with respect to a sheet feeding direction, and a load set control for prohibiting a reverse rotation of the rotary sheet supply roller is disclosed. A skew-feed of the sheet is corrected by the feeding of the sheet in the reverse direction by use of the rotary feed roller and the load set control.

Abstract: Disclosed is a paper feeder for sequentially feeding laminated cutform paper to a record/write portion or the like. Proper sagging of the cutform paper is produced on this side of a paper feeding roller during rotations of the paper feeding roller in an anti-feeding direction, thus adjusting the direction thereof. Subsequently, with rotations of the paper feeding roller in a paper feeding direction, a feed roller is temporarily rotated. The paper feeding roller is caused to exactly pull in the cutform paper without exerting abrupt fluctuations in load on the paper feeding roller and the cutform paper.

Abstract: A sheet transporting device including a first and a second transporting rollers having different starting/stopping characteristics and capable of retransporting a sheet after the sheet is temporarily held between the first and the second transporting rollers. The sheet transporting device detects an amount of loop in a sheet which is produced between the first and the second transporting rollers and controls timing by which the second transporting rollers are started so as to delay the start until after the first transporting rollers are started in accordance with the detected amount of the loop.

Abstract: An apparatus to bilaterally register and deskew sheets in an electrophotographic printing machine by driving the sheet against a pair of stalled drive rolls and then activating the drive rolls when the sheet is deskewed. The drive rolls are then laterally translated while the sheet is within the nips of the drive rolls. The proper side registration position of the sheet is sensed and stored and the sheet is brought to that proper registration position. Once the sheet has passed through the drive rolls, the rolls return to the center of the paper path to receive subsequent sheets. A stepper motor is used to translate the roll pairs in a lateral direction and the pulse counts are utilized to store the side registration and sheet acquisition positions thereby eliminating the need for a home position sensor or switch.

Abstract: An image forming apparatus is provided with a paper sheet feeder for selective feeding from a group of paper sheets in either a first or second cassette. In the paper sheet feeder, first and second registration rollers are provided in front of the first and second cassettes respectively, and a common registration roller is provided in front of a photosensitive drum. When the first group of paper sheets is selected, a first paper sheet is supplied to the first registration roller from the first cassette so that the paper sheet is registered by the first registration roller. The registered paper sheet is supplied to the common registration roller so that the paper sheet is also registered by the common registration roller. When the second group of paper sheets is selected, the second paper sheet is supplied to the second registration roller from the second cassette so that the paper sheet is registered by the second registration roller.

Abstract: A printer 20 for imprinting data on a variety of multi-dimensional media 62 has media based registration and can accomplish free edge printing for printing data adjacent edges. The printer 20 includes a transport mechanism 52 for accurately transporting and positioning the media 62 before a print head 102. Further, the printer 20 includes a carriage mounted sensor 144 for media edge detection, registration and media size determination. A media presentation mechanism 96 ensures that the media 62 is appropriately presented and maintained at the optimal distance from and orientation with respect to the print head 102.

Abstract: There is described a sheet feeding apparatus having a stacking tray on which sheets are stacked, a first sheet feeding rotary member for supplying a sheet from the stacking tray, and a second sheet feeding rotary member for feeding the sheet from the first sheet feeding rotary member toward a predetermined processing position. The feeding apparatus has a control for rotating the second sheet feeding rotary member for a predetermined time during the feeding of a preceding sheet, for stopping the preceding sheet with a trailing end thereof being retained in a nip of the second sheet feeding rotary member and then for rotating the second sheet feeding rotary member with a leading end of a next sheet being inserted into the nip to feed the preceding and next sheeets simultaneously.

Abstract: A sheet material feeding device includes a first conveying path for feeding sheet material, a second conveying path for feeding the sheet material and which joins the first conveying path, an anchoring unit for anchoring and bending the leading end of the sheet material fed through the first conveying path or the second conveying path, and a guide member provided at the joining point of the first conveying path and the second conveying path for allowing the sheet material fed from an upstream side through the first conveying path to pass the joining point and for preventing the sheet material fed from a downstream side through the first conveying path from entering an upstream side from the joining point. The guide member presses a curved portion of the sheet material formed by the leading end of the sheet material fed through the first conveying path anchored by the anchoring unit in a direction to flatten that portion.

Abstract: A switch is located near a pair of register rollers for feeding a document sheet toward a platen glass. A pair of document-feeding rollers are located near a platen glass. When the switch detects the rear edge of the document sheet being fed by the register rollers, it generates a signal. Upon receipt of this signal, the document-feeding rollers rotate, thus feeding the sheet for a prescribed distance and placing it at a predetermined position on the platen glass. The image on the sheet, thus positioned, is copied. An upper roller and a lower roller contacting each other are arranged at the exit side of the register rollers. The document sheets are braked as they pass, one after another, through the gap between the upper and lower rollers and are fed at the same speed, thus reducing their speeds to one and the same speed in spite of their different inertias.

Abstract: Feedback control for receiver member in-track registration for immediacy of registration error correction and improved long term in-track registration accuracy. In an electrostatographic reproduction apparatus or the like, a receiver member is fed at a preselected time from a supply and transported along a travel path, including a registration mechanism adapted to selectively intercept the travel path. The receiver member is stopped at the intercept position, and a desired dwell time for the receiver member at the intercept position, prior to actuation of the registration mechanism, is established. After expiration of the dwell time, the registration mechanism is actuated to advance the receiver member from the intercept position into association with a marking particle developed image. the receiver member is sensed at a predetermined location downstream of the registration mechanism and a signal indicative thereof is provided.

Abstract: A sheet feeding apparatus is provided having a first rotary member for feeding a sheet material and a second rotary member arranged at a downstream side of the first rotary member in the sheet feeding direction, for further feeding the sheet material. A drive source rotates the first and second rotary members. A transmitter is adapted to be engaged to rotate the first rotary member in the sheet feeding direction and to be disengaged to stop the second rotary member, when the drive source is rotated in one direction. The transmitter is adapted to be disengaged to stop the first rotary member and to be engaged to rotate the second rotary member in the sheet feeding direction, when the drive source is rotated in the other direction. The rotation of the first rotary member is prohibited in the sheet feeding direction at the start of rotation of the drive source in the other direction.

Abstract: Between a sheet separation arrangement and a sheet skew correction means which are disposed along a non-linear sheet guide passage, there is provided at least one idle roller partly protruding into the passage so that the transferring efficiency of a sheet feeding device can be improved. Additionally by providing a damping member within the sheet guide passage, a sheet can be smoothly transferred along the passage at a high speed without producing harsh noises.

Abstract: In a document feeding apparatus, a first motor which drives a transporting mechanism provided at downstream side in the document transporting direction of a pair of timing rollers and a clutch connected with the pair of rollers are firstly energized, and the energized first motor drives the transport mechanism and the pair of timing rollers in the document transporting direction. A second motor which drives a paper feeding mechanism and is provided at upstream side in the document transporting direction of the pair of timing rollers drives the paper feeding mechanism after it is energized for a predetermined period of time to transport two sheets of originals placed and in contact with the pair of timing rollers from its downstream and upstream sides onto a platen glass. A sensor which detects the rear edge of an original being discharged from the platen glass is prohibited from detecting the rear edge of an original firstly discharged.

Abstract: In a sheet feeding apparatus which is employable in a printer and the like, provided is a mechanism for removing sag of the printing sheet caused by backward feeding operation executed when the reverse line feed operation and so on. Further, the mechanism controls the sheet feeding operation so as to be executed without a disadvantage caused by backlash included in a gear mechanism for driving the sheet to be fed. Thus, the printing sheet is accurately set at a printing position.

Abstract: The present invention is related to a sheet member feeding apparatus for feeding a sheet member such as an envelope. The feeding apparatus has a pair of opposed contacted rotary members such as rollers and comprising a releasing member for releasing the contact between the rotary members provided on at least one of the rotary members in areas where front corners of the sheet member pass through. The feeding apparatus is applicable to a printing system, reader system and the like.

Abstract: A sheet feeding device is provided for taking up and feeding a plurality of sheets one by one by a selectively driven sheet feeding roller from the stack thereof positioned on a sheet feeding base to a register roller and for transporting the sheet to an image developing and processing device at a predetermined timing by the register roller; the feeding device comprising a movable sheet guide member provided between the feeding roller and the register roller which is adapted to be displaced by the curving deformation of a sheet between the feeding roller and the register roller in the direction of the growing of the curving deformation. The feeding device may further comprise a detector for sensing the displacement of the sheet guide member to determine based upon the displacement that a predetermined curvature of a sheet has been reached, and a control for stopping the rotation of the feeding roller in response to the detection by the detector so as to prevent the sheet from deforming excessively.

Abstract: An automatic sheet feed alignment system is described for feeding sheets of print media such as paper to print mechanism in alignment with the print mechanism. A single motor drives a main sheet advance roller, and is also coupled to a sheet pick roller through a non-reversing clutch. An idler roller is disposed adjacent the drive roller. To feed a sheet into the print position, the motor drives the main drive roller and sheet pick roller in a sheet advancing direction, until the sheet leading edge is advanced into and past the nip between the main drive and idler rollers. The motor direction is then reversed so that the main roller retracts the sheet. Because the sheet pick roller is not driven in the reverse direction, a buckle is formed in the sheet between the sheet pick roller and the nip, tending to align the leading sheet edge with the nip. The motor direction is then reversed to drive the sheet forward to the print position, its leading edge having been aligned.

Abstract: A thermal development image forming apparatus includes an exposure section, an overlapping section, a developing/transfer section, a sheet separating section, and a correcting section. The exposure section forms a latent image by exposing a photosensitive sheet. The overlapping section overlaps the exposed photosensitive sheet on an image-receiving sheet. The developing/transfer section heats/presses the overlapped sheets so as to develop the latent image on the photosensitive sheet and transfer the developed image onto the image-receiving sheet. The sheet separating section separates the photosensitive sheet from the image-receiving sheet image upon image development/transfer. The correcting section for correcting skews of the sheets in a feed direction is arranged in a step prior to that of the sheet separating section.

Abstract: Skew-correcting apparatus in which first and second sets of opposing feed rollers each comprise a pair of end rollers and a center roller between the end rollers. The first center roller has a sheet-gripping portion of limited circumferential extent forming a nip with the second center roller, while the first pair of end rollers engage the second pair of end rollers. The second set of rollers are coupled for common rotation; the first pair of end rollers are mounted for rotation relative to the first center roller. The first center roller is driven while the remaining rollers are retarded so that the remaining rollers are normally stationary to align the leading edge of a sheet but are driven by the sheet-gripping portion of the first center roller to advance the sheet through the nip. A downstream feed roller driven synchronously with the first center roller and also having a sheet-gripping portion of limited circumferential extent is used to advance a sheet to the opposing sets of feed rollers.

Abstract: A sheet conveyance apparatus composed of a unit which is driven independently of an image forming part of the electrophotographic copying apparatus. The sheet conveyance apparatus is disposed between a sheet feed apparatus and the image-forming part having a photoreceptor on the electrographic copying apparatus. A loop is consistently maintained on the sheet as it is transported within the sheet conveyance apparatus which also includes registration rollers incorporated therein. After the loop is formed, the sheet is stopped at the registration rollers to correct skew. Then, the registration rollers convey the sheet to the image-forming part.

Abstract: A loop is formed between upstream and downstream pairs of rollers by driving the downstream pair slower than the upstream pair and/or by a direction changing guide. The downstream pair of rollers is axially movable to bring an in-track edge of a sheet to a predetermined sensed position to cross-track register the sheet. The loop permits cross-track movement of the sheet despite engagement of the sheet with the upstream pair of rollers.

Abstract: In the paper feed mechanism disclosed herein, a pick roller is journaled in a swing member which is pivoted on a horizontal drive shaft extending across the paper path. The periphery of the pick roller frictionally engages the drive shaft and the swing mechanism depends from the drive shaft through a friction fit. When the drive shaft is rotated in the appropriate direction, the pick roller is swung, due to the frictional fit, against the front sheet of a paper pack and continued rotation of the shaft drives the pick roller into wedging engagement with the sheet, causing the sheet to advance and separate from the pack.

Abstract: A sheet supplying apparatus supplies sheets one by one from a paper cassette to a transfer portion defined between a photosensitive body and a transfer charger in a housing. The sheet is picked up by rotation of a pair of feed rollers. The picked-up sheet is aligned by register rollers. The feed rollers are driven in synchronism with the operation of the register rollers.

Abstract: The leading ends of sheets in a storage container are brought into abutment against arcuate portions of stopper rollers by an abutment roller to orient the sheets properly with respect to the first direction, i.e, to correct the sheets out of a skewed condition Then, the sheets are fed between a feed roller and a separator roller to arrow the separator roller to separate the uppermost sheet from the other sheets. Thereafter the other sheets are fed back into the storage container by reverse rollers.

Abstract: A sheet feeder for feeding sheets one by one to a transfer path comprises feed rollers, aligning rollers, a reversible motor and a one-way clutch arranged between the motor and the aligning roller and, when the motor is rotated in one direction, transmitting a motive power to the aligning roller. Clutch mechanisms for transmitting the rotation of the motor is arranged between the motor and the feed rollers. Each of the clutch mechanisms includes a pair of connectors formed with mating indentations, the connectors being adapted for engagement with or disengagement from each other when the motor is stopped.

Abstract: A paper sheet feeder includes an input roller, an interposed roller, an output roller and a motor. The interposed roller serves both as a paper-feeder and a paper-stopper by changing the drive direction of the motor. A one-way clutch is provided at the interposed roller and is effective to allow the roller both to stop the paper and to drive the paper. The input roller is also provided with a one-way clutch. A single motor effects both sheet removal from a pile and sheet feeding.

Abstract: A sheet feeding apparatus for use with a printing office machine includes at least one magazine, a drive wheel for removing a single sheet from the magazine and passing the sheet in a forward direction the nip of a printing wheel; the printing wheel is drivingly connectable with the separating roller and is driven in a forward direction to provide rotary power to the sheet feeder wheel to effect feeding of a single sheet to the nip; the method includes first driving the printing wheel in the forward direction and then reversing the direction of rotation of the printing wheel to move the sheet back out of the nip, the reverse rotation being disengaged from the separating wheel by a latch device.

Abstract: This specification discloses a sheet conveying device for correcting oblique feeding of sheets and conveying the sheets in a predetermined direction of conveyance. The sheet conveying device has first sheet conveying apparatus for conveying sheets, second sheet conveying apparatus provided downstream of the first sheet conveying apparatus with respect to the direction of conveyance, and apparatus for forming a loop between the first and the second sheet conveying apparatus by the conveying force of the first sheet conveying apparatus and thereafter displacing the second sheet conveying apparatus holding a sheet thereon in a direction perpendicular to the predetermined direction of conveyance.

Abstract: A sheet supplying apparatus supplies sheets one by one from a paper cassette to a sheet feed portion defined between a photosensitive body and a transfer charger in a housing. The sheet is picked up by rotation of a pair of feed rollers. The picked-up sheet is aligned by register rollers. The feed rollers are then driven in synchronism with the operation of the register rollers.

Abstract: A sheet material conveying device includes a feed roller assembly and a temporary hampering device disposed downstream of the roller assembly. The conveying device includes a driven shaft to be rotated by a driving source and a plurality of driven rollers mounted on the shaft. The driven rollers comprise at least one positively driven roller having a non-slip rotary connection with the driven shaft and at least one negatively driven roller having a slip connection with the driven shaft. The positively driven roller is mounted on the driven shaft so as to be rotated continuously with rotation of the driven shaft. The negatively driven roller has an inside diameter larger than the outside diameter of the driven shaft and is rotatably mounted on the driven shaft.

Abstract: A sheet feeder for feeding sheets one by one to a transfer path comprises feed rollers, aligning rollers, and a motor. Clutch mechanisms for transmitting the rotation of the motor are arranged individually between the motor and the feed rollers, and between the motor and the aligning rollers. Each of the clutch mechanisms includes a pair of connectors formed with mating indentations, the connectors being adapted for engagement with or disengagement from each other when the motor is stopped.

Abstract: A paper sheet material conveying device has a feed roller assembly and a temporary hampering assembly disposed downstream thereof. The sheet material conveying device includes a driven shaft to be rotated by a driving source and a driven roller mounted thereon. The driven roller has an inside diameter larger than the outside diameter of the driven shaft and is mounted rotatably on the driven shaft. When the forward movement of the sheet material fed by the feed roller assembly is hampered by the temporary hampering assembly, the rotation of the driven roller is stopped by the resistance of the sheet material exerted on the driven roller in spite of the rotation of the driven shaft.

Abstract: Documents are advanced to a registered position along the trailing edge of the exposure platen of an electrophotographic copier by a flat belt supported adjacent to the registration edge by a pulley formed with axially spaced indentations to produce corresponding corrugations in the belt. A registration gate having a blocking position in which transversely spaced fingers extend into the belt corrugations arrest the documents at the registration edge while the normal-diameter portions of the belt pulley press the document downwardly to prevent it from riding over the registration gate. Position pulses from an encoding wheel are counted to determine the position of the document, and drive motor is slowed to one-fifth its normal speed when the document advances within a predetermined distance of the registration edge.

Abstract: A paper feeding device includes conveyor rollers including top rollers and bottom rollers which rotate in the same direction and disposed respectively on two shafts in alternate positions. Timing rollers are provided on the down stream side of the conveyor rollers. The center-to-center distance between the two shafts is somewhat smaller than the sum of the radii of the top and bottom rollers. A recess is provided on each of the top rollers, so that the recess faces the direction of the circumference of the bottom rollers, when the forward end of the original sheet conveyed to the timing rollers by conveyor rollers abuts the timing rollers.

Abstract: A paper tray having a bottom, front and rear walls extending upwardly from the bottom, and side walls extending upwardly from the bottom to define an open boxlike structure for storage of sheets of paper in readiness for use. A paper receiver is pivotably mounted on the tray for receiving sheets of paper after printing thereof. The paper receiver has a first position in which paper can be fed automatically from the tray to a print roller and a second position in which paper can be manually fed to the print roller. In the automatic mode, the paper is fed by a drive roller to produce a buckle at its leading position to insure alignment at the print roller and subsequent straight, unskewed feed. The paper receiver carries a conveyor belt driven from the print roller at a greater linear speed to insure positive feed of the paper from the print roller to a receiving station.