A sheet conveyance apparatus includes a sheet conveyor configured to convey a sheet, a guide configured to form a conveyance path through which the sheet is conveyed by the sheet conveyor, and a sensor disposed on a same side as the guide with respect to the conveyance path. The guide includes a retracted portion disposed over a first region in a sheet width direction perpendicular to a sheet conveyance direction, the retracted portion being retracted with respect to a second region of the guide in the sheet width direction so as not to come into contact with the sheet passing through the conveyance path, the first region including a detection region of the sensor in the sheet width direction, the second region being a sheet passing region of the sheet in the sheet width direction excluding the first region.

A transport apparatus includes a mounting section on which a medium is to be mounted, a drive section configured to drive the mounting section in a moving direction and a protection section configured to be switched between a protection state for protecting the drive section and a release state for releasing protection of the drive section. The mounting section has a driven section that engages with the drive section and is driven by the drive section. When the driven section driven by the drive section engages with the drive section, the protection section is in the release state, and when the driven section does not engage with the drive section, the protection section is in the protection state.

The invention relates to a reel-up (1) for receiving and winding into a roll (5) a paper web (W) that arrives from a drying cylinder (2) in a paper making machine. The reel-up (1) comprises a rotatably mounted reel spool (4) onto which a paper web (W) can be wound to create a paper roll (5) of increasing diameter and an endless flexible belt (6) mounted for rotation along a predetermined path of travel such that the flexible belt (6) forms a loop. The flexible belt (6) is positioned adjacent to the reel spool (4) to engage the paper web (W) against the reel spool (4) during winding such that the flexible belt (6) is deflected from the predetermined path of travel when the paper roll (5) starts to build up on the reel spool (4). The flexible belt (6) is air permeable and at least one blow box (7, 8, 9) is arranged inside the loop of the flexible belt (6) such that an underpressure can be generated that draws the paper web (W) against the flexible belt (6). The at least one blow box (7, 8, 9) has at least one nozzle (10) through which air is blown out of the at least one blow box (7, 8, 9) and the nozzle is shaped as a slot. According to the invention, the at least one blow (7,8, 9) box faces the flexible belt (6) with an outer surface (11) which is convexly curved such that dust which has been sucked through the flexible belt (6) and lands on the at least one blow box (7, 8, 9) is helped by gravity to glide along the outer surface (11) of the blow box (7, 8, 9) and fall of the blow box (7, 8, 9).

A paper sheet handling machine 100 comprises an upper unit 10 having a paper sheet take-in apparatus 120 adapted for taking therein paper sheets, one by one, from the exterior, an upper transport mechanism 201a adapted for transporting the paper sheets taken in by the paper sheet take-in apparatus 120, one by one, and a recognition unit 220 adapted for recognizing each paper sheet transported by the upper transport mechanism 201a; a lower unit 20 located below the upper unit 10 and having a lower transport mechanism 201b provided to receive the paper sheets transferred from the upper transport mechanism 201a, one by one, and then further transport the transferred paper sheets, and a plurality of stacking units 106, each adapted for stacking therein the paper sheets transported by the lower transport mechanism 201b and sorted based on results obtained by the recognition unit 220. In this case, at least a part of a bottom portion of the upper unit 10 is opened. Additionally, a partition member 30 is provided between the upper unit 10 and the lower unit 20.

An image forming apparatus includes an image forming unit, a paper loading base on which manual-feed paper is loaded, a manual-feed paper conveying unit, and a dustproof cover which covers the paper loading base being in the overhang state. The paper loading base has a lower end rotatably supported on one outer surface portion of the device main body, and is opened from an upper end thereof and disposed at a predetermined oblique angle or in a horizontal overhang state such that an overhang side becomes an upper side in an oblique direction. The manual-feed paper conveying unit is conveys the manual-feed paper on the paper loading base onto a paper conveyance path one by one. The dustproof cover includes a base which engages with the paper loading base, and an opening-and-closing cover which is rotatably connected to the base and is opened upwardly on the overhang side.

What is disclosed is a system for detecting a leading edge of a sheet in a paper handling system of a document reproduction device. An illuminator continuously projects a beam of light into a first end of a light transmissive medium. The projected light propagates through the medium and exits an opposite end thereof. The first end is offset from the illuminator to form a first gap. The light is continuously detected by a detector as the light exits the light transmissive medium. The opposite end of the medium is offset from the detector to form a second gap. A paper sheet is transported along the paper path such that it traverses the area defined by the first and second gaps. If the detector no longer detects the light exiting the opposite end of the medium, a signal is given that a leading edge of the sheet has been detected.

A transport apparatus includes a mounting section on which a medium is to be mounted, a drive section configured to drive the mounting section in a moving direction and a protection section configured to be switched between a protection state for protecting the drive section and a release state for releasing protection of the drive section. The mounting section has a driven section that engages with the drive section and is driven by the drive section. When the driven section driven by the drive section engages with the drive section, the protection section is in the release state, and when the driven section does not engage with the drive section, the protection section is in the protection state.

The medium detection unit is a component constituting an optical path of the detection light, and includes a first optical element disposed on an upper side of the medium transport path and a second optical element disposed on a lower side of the medium transport path so as to face the first optical element, the second optical element has a facing surface that faces the first optical element, the facing surface being located at a position that is not in contact with a medium nipped by both the first roller pair and the second roller pair, and a medium feeding direction by the first roller pair is a direction by which a leading edge of a medium fed out abuts a position upstream in the medium transport direction relative to a position where the detection light is received on the facing surface.

A dust hood for a dust control system includes a first hood body and a second hood body. The first hood body and the second hood body are each selectively movable between an assembled position and a disassembled position. In the assembled position, the first hood body is adjacent to the second hood body. In the disassembled position, the first hood body is spaced apart from the second hood body.

A sheet conveying device includes: a tray; a roller; a roller arm; a lever; and a dust proof cover including: a first cover, a second cover, and a pressure piece. The roller arm is movable between an abutment position where the roller abuts on the tray and a separation position where the roller is away from the tray. The second cover is movable between a first position in proximity to the tray and a second position away from the tray. The pressure piece is away from the lever to permit the roller to be positioned in the abutment position when the second cover is in the first position, and presses the lever to move the roller to the separation position when the second cover is in the second position.