Abstract: A sheet conveyor incorporated in an image forming apparatus includes an attraction/separation unit including an attraction belt, a first tension roller, and a second tension roller, a support member to support the attraction/separation unit, a roller drive unit to rotate one of the first and second tension rollers, a charging member to uniformly charge a surface of the attraction belt, a mechanism to swing the attraction/separation unit to move the attraction belt reciprocally about the support member between a sheet attraction position and a sheet conveyance position being located farther from the sheet stack than the sheet attraction position, and a pressing member disposed inside a loop of the attraction belt to press the attraction belt at the sheet attraction position toward the sheet stack and separating from the attraction belt at the sheet conveyance position.

Abstract: A sheet feeder, which is incorporated in an image forming apparatus, includes a sheet container, a sheet conveying member disposed facing a sheet stack that includes multiple sheet members loaded on the sheet container to separate an uppermost sheet member placed on the sheet stack from the other sheet members and to convey the uppermost sheet member, and a pressing member switchable between a pressing position to press the sheet stack from above and a retracted position to separate from the sheet stack.

Abstract: A sheet conveyor incorporated in an image forming apparatus includes an attraction/separation unit including an attraction belt, a first tension roller, and a second tension roller, a support member to support the attraction/separation unit, a roller drive unit to rotate one of the first and second tension rollers, a charging member to uniformly charge a surface of the attraction belt, a mechanism to swing the attraction/separation unit to move the attraction belt reciprocally about the support member between a sheet attraction position and a sheet conveyance position being located farther from the sheet stack than the sheet attraction position, and a pressing member disposed inside a loop of the attraction belt to press the attraction belt at the sheet attraction position toward the sheet stack and separating from the attraction belt at the sheet conveyance position.

Abstract: A sheet feeding device that is incorporatable in an image forming apparatus includes an endless belt disposed facing an upper surface of a sheet stack to convey sheets of the sheet stack forward in a first moving direction of a surface thereof, an attraction unit to attract an uppermost sheet of the sheet stack to the endless belt, a contact and separation unit to contact and separate the endless belt relative to the sheet stack, and a controller to cause the endless belt to contact or substantially contact the upper surface of the sheet stack to attract the uppermost sheet to the endless belt, perform a pre-separation operation in which the endless belt moves in a reverse direction that is opposite the sheet conveyance direction, and then perform a separating operation in which the endless belt separates from the sheet stack.

Abstract: A system for conveying mailpieces along a feed path including first and second conveyances. A first conveyance is operative to convey mailpieces along the feed path and includes a singulating and drive belt. The singulating and drive belts define a throat or singulating a mailpiece from the stack of mailpieces. A second conveyance accepts mailpieces from the first conveyance and conveys singulated mailpiece downstream of the first conveyance. The system further includes a series of sensors extending from the first to the second conveyance for issuing a gap signal indicative of the relative spacing between sequential mailpieces along the feed path. Additionally, the system includes a means to vary the velocity of the drive belt based upon the location of the gap signal along the series of sensors.

Abstract: An image forming apparatus allowing a printing section inside of a casing to print paper and discharging the printed paper from the casing through a discharge port of the casing includes a discharge tray configured such that the position thereof is switchable from a placement position for covering the surface of a feeding belt and receiving the paper discharged from the casing to an exposure position for exposing the surface of the feeding belt, and vice versa, wherein a surface of the discharge tray has a coefficient of friction lower than the surface of the feeding belt.

Abstract: A friction feeder apparatus for handling sheets of paper of differing thicknesses includes a first plurality of laterally spaced apart transport belts positioned in underlying relation to the paper and a second plurality of laterally spaced apart separator wheels positioned in overlying relation to the paper. The transport belts are staggered with respect to the separator wheels. A sheet of paper passing through the feeder apparatus is undeflected from the top as it encounters the transport belts and is unsupported from the bottom as it encounters the separator wheels so that the sheet of paper is not held flat as it passes through the feeder but instead is forced into a wave-like, sinusoidal-like shape. In a first embodiment, the separator wheels are downstream of a fixed nip roller and in a second embodiment, the separator wheels are upstream of the fixed nip roller.

Abstract: An image reading apparatus includes a document positioning plate configured to have a document positioned thereon, a conveyance belt configured to convey the document to the document positioning plate, an image reading unit configured to read an image of the document positioned on the document positioning plate, and an image unevenness reducing unit configured to reduce image unevenness caused by the conveyance belt deflecting in a main scanning direction. The image unevenness reducing unit corrects the readout image based on correction coefficients each corresponding to a combination of a sub scanning position and a main scanning position of the image.

Abstract: A sheet feeder having a stack hopper for holding a stack of sheets, and feed belts for advancing the bottom-most sheet from the stack, is constructed to move at least one of the feed belts laterally toward and away from another of the feed belts while the belts are being driven. Preferably, side guides extend substantially to the end of the feeder, and extend both above and below the upper surface of belts to which they are adjacent. The belts extend between and around shafts of uniform diameter through the reach of lateral movement of the belts. The shafts are journaled in bearings mounted in such a way that they can be lifted out to change belts quickly and easily.

Abstract: An apparatus is provided for processing mail by severing an edge of each envelope in a stack of mail. The apparatus includes an input bin for receiving a stack of mail. An agitator confronting the stack of envelopes in the input bin reciprocally displaces the bottom envelope in the stack of mail to provide separation between the bottom envelope and the remaining envelopes in the stack. A feeder feeds the bottom envelope from the input bin to a transport that conveys the envelope along an envelope path. A cutter positioned along the envelope path severs one edge of the envelopes. The transport discharges the opened envelopes onto a return conveyor that conveys the opened envelopes to a stacking area where the opened envelopes are stacked.

Abstract: A sheet transfer apparatus for an image reading apparatus includes a sheet supply tray for storing a sheet; a sheet supply device for drawing out the sheet on the sheet supply tray; a transfer device for receiving the sheet from the sheet supply means and placing the sheet at a predetermined position on a platen of an image reading apparatus for reading the image thereon; a discharge device for discharging the sheet on the platen after reading the image thereon; and a discharge tray for receiving the sheet discharged by the discharge device. A switchback device is disposed above the platen for reversing the sheet when necessary, and includes a switchback path for receiving the sheet to reverse the same. The switchback path includes a first opening portion for opening a first area near an inlet side, and a second opening portion for opening a second area away from the inlet side of the switchback path. The switchback path is easily accessible when the sheet is jammed.

Abstract: An apparatus and method for supplying a plurality of box sheets comprising first belts which are movable in a predetermined direction, second belts which are also movable in the predetermined direction of the first belts, a shutter located above at least one of the first belts or the second belts, wherein the shutter is located so as to allow only one of the plurality of box sheets to be supplied beneath the shutter at a time, and a control system for controlling an operation of the second belts, wherein a coefficient of friction between the second belts and the box sheets is stronger than a coefficient of friction between the first belts and the box sheets.