In one example in accordance with the present disclosure a system for preventing media misalignment during accumulation. The system includes a number of media clamps having multiple positions to prevent misalignment of an incoming media sheet during accumulation. The number of media clamps are in a raised position after a leading edge of the incoming media sheet has passed over a trailing edge of the stack region. The media clamps are in a clamped position after the leading edge of the incoming media sheet has passed the media clamp.

An interleaving unit, comprising a pair of rolls (1, 2) set alongside one another and counter-rotating and provided with respective first and second folding tools (3, 4; 5, 6) set at a distance from one another along the circumferential development of the respective peripheral surfaces so as to operate in a common point of tangency (Z) on a succession of sheets (7a, 7b) fed between the two rolls, said tools (3, 4; 5, 6) being set on respective mobile cylinder sectors (8, 9, 10, 11) to enable positioning thereof at an adjustable distance apart along the circumferential development of a corresponding roll (1, 2), said interleaving unit comprising means (M1, M2, U) for independently adjusting the speed of rotation of one or more of said sectors according to their angular position in order to reduce or increase the peripheral speed of said sectors with respect to a speed of feed (Vm) of said sheets.

An interleaving unit, comprising a pair of rolls (1, 2) set alongside one another and counter-rotating and provided with respective first and second folding tools (3, 4; 5, 6) set at a distance from one another along the circumferential development of the respective peripheral surfaces so as to operate in a common point of tangency (Z) on a succession of sheets (7a, 7b) fed between the two rolls, said tools (3, 4; 5, 6) being set on respective mobile cylinder sectors (8, 9, 10, 11) to enable positioning thereof at an adjustable distance apart along the circumferential development of a corresponding roll (1, 2), said interleaving unit comprising means (M1, M2, U) for independently adjusting the speed of rotation of one or more of said sectors according to their angular position in order to reduce or increase the peripheral speed of said sectors with respect to a speed of feed (Vm) of said sheets.

Examples disclosed herein relate to moving a bail arm. Examples include to determine a size of a medium to be ejected to an output tray; acquire a fill state of the output tray; and raise a bail arm to a first position above a receiving surface of the output tray when the size of the medium is larger than a size threshold and the fill state is lower than a stack height threshold.

Examples disclosed herein relate to moving a bail arm. Examples include to determine a size of a medium to be ejected to an output tray; acquire a fill state of the output tray; and raise a bail arm to a first position above a receiving surface of the output tray when the size of the medium is larger than a size threshold and the fill state is lower than a stack height threshold.

A medium discharging device includes a discharging unit which discharges a medium; and a medium receiving tray which receives the medium discharged by the discharging unit, and is switched between an extended state and an accommodated state, in which the medium receiving tray is provided with a base tray, a main extendeding unit that is accommodated or extended, and at least one sub-extendeding unit that is accommodated or extended, and in which the base tray forms an accommodating space for accommodating at least the one sub-extendeding unit, and is provided with a first protrusion portion protruding toward the accommodating space.

A medium discharging device includes a discharging unit which discharges a medium; and a medium receiving tray which receives the medium discharged by the discharging unit, and is switched between an extended state and an accommodated state, in which the medium receiving tray is provided with a base tray, a main extendeding unit that is accommodated or extended, and at least one sub-extendeding unit that is accommodated or extended, and in which the base tray forms an accommodating space for accommodating at least the one sub-extendeding unit, and is provided with a first protrusion portion protruding toward the accommodating space.

A paper sheet processing apparatus includes a processing tray, a feed member, a drive unit, a detection unit, and a control unit. The processing tray receives and stacks a plurality of paper sheets. The feed member faces the processing tray and includes a paddle that is elastically deformed by being pressed against the paper sheets during rotation. The drive unit rotates the feed member. The detection unit detects a leading end of the paper sheet being fed toward the alignment surface by the paddle. The control unit controls the drive unit based on a detection result during a period from if the detection unit detects the leading end of the paper sheet to if the paddle separates from the paper sheet and controls the rotation of the feed member so that the leading end of the paper sheet scraped by the paddle is aligned with the alignment surface.

A sheet transport apparatus according to an embodiment includes a roller having a surface formed from an elastic material. The roller transports a sheet. A rotation mechanism rotated the roller around an axis of the roller. A twist mechanism selectively twists the roller with respect to the axis. When the roller is twisted and the rotation mechanism rotates the roller, a sheet transported by the roller is transported in a first direction perpendicular to the axis and in a second direction parallel to the axis. When the roller is not twisted and the rotation mechanism rotates the roller, a sheet transported by the roller is transported in the first direction and not in the second direction.

The present disclosure relates to the technical field of double-sheet detection, and discloses a double-sheet detection device. The double-sheet detection device includes a paper feeding machine body, wherein a main body plate is arranged on an outer side of the paper feeding machine body; a detection mechanism is arranged on an inner side of the main body plate; the paper feeding machine body is provided with a storage assembly; the detection mechanism includes a U-shaped plate; and the U-shaped plate is arranged on the inner side of the main body plate. When a detection wheel rolls on the paper feeding machine body, after a piece of paper passes, a moving distance of the detection wheel on the paper is matched with a thickness of the paper, so as to determine the number of pieces of paper and achieve the purpose of double-sheet detection.