A paper processing device includes a casing, a transfer roller assembly and a paper pressing mechanism. The casing includes a paper placement platform. The plural papers from a printing device are transferred to the paper placement platform by the transfer roller assembly. The paper pressing mechanism is located under the casing. The paper pressing mechanism includes a support frame, a pressing bar, a driving mechanism and a linking mechanism. The pressing bar includes a protrusion block. The protrusion block is penetrated through an opening of the casing. The protrusion block and the paper placement platform face each other. The linking mechanism is connected between the driving mechanism and the pressing bar. While the linking mechanism is driven by the driving mechanism, the pressing bar is moved linearly relative to the support frame, and the protrusion block is moved from an initial position to a target position.

A sheet conveyance apparatus includes a first guide provided in an apparatus body, a second guide provided in an openable portion, a flag member supported by the apparatus body pivotally, a detection unit configured to detect pivoting of the flag member, and a jam release guide provided in the apparatus body. In a state where the openable portion is open, the flag member is protruded into a space that is created between the openable portion and the apparatus body by an opening operation of the openable portion. The jam release guide is disposed at a position not hampering conveyance of the sheet in a state where the openable portion is closed, and is disposed to come in contact, together with the flag member, with a jammed sheet to regulate a posture of the jammed sheet in a state where the openable portion is open.

A paper processing device includes a casing, a transfer roller assembly and a paper pressing mechanism. The casing includes a paper placement platform. The plural papers from a printing device are transferred to the paper placement platform by the transfer roller assembly. The paper pressing mechanism is located under the casing. The paper pressing mechanism includes a support frame, a pressing bar, a driving mechanism and a linking mechanism. The pressing bar includes a protrusion block. The protrusion block is penetrated through an opening of the casing. The protrusion block and the paper placement platform face each other. The linking mechanism is connected between the driving mechanism and the pressing bar. While the linking mechanism is driven by the driving mechanism, the pressing bar is moved linearly relative to the support frame, and the protrusion block is moved from an initial position to a target position.

A sheet stacking device includes a tray having a sheet loading surface on which a sheet fed in a predetermined feeding direction is loaded. The tray includes a main tray, an extension tray and a first detection part. The first detection part includes a first sensor, a first detected piece and a first contact piece. The first detected piece is turnably supported by the extension tray and switches the first sensor between an ON state and an OFF state. The first contact piece is turnably supported by the first detected piece, and protrudes above and retracts below the sheet loading surface.

A line is disclosed for producing logs of web material provided with a system for controlling, in real time, one or more parameters of the logs produced by the line and for facilitating any corrective actions. The line includes a rewinder, a feed path for the logs from the rewinder towards at least one station arranged downstream of the rewinder; and a measurement station. The measurement station includes at least a measurement device for measuring at least one parameter of logs randomly selected from the feed path and held in the measurement station, for example a device for measuring the firmness of the logs. The measurement station further includes first transferring members for transferring selected logs from the feed path to the measurement station, and second transferring members for transferring selected logs from the measurement station to the feed path.

In an example, an indicator may comprise an arm pivotally disposed within a media tray, an indicator plate movably coupled to the media tray, and a latch engaged with the arm and the indicator plate. The media tray may receive print media. The latch may support the indicator plate in a raised position, and the latch may release the indicator plate to a lowered position upon the arm pivoting the latch from a latched position to a released position.

An image forming apparatus includes a first unit, a second unit fixed to the first unit at a portion upstream of the first unit in a conveyance direction in which the sheet is conveyed, and an electric board. In the image forming apparatus, a disposition of the electric board is restricted by the first unit and the second unit.

A paper sheet post-processing device includes a processing tray, an aligning member that aligns paper sheets on the processing tray, a swingable holder that supports the aligning member, a swinging mechanism that causes the holder to swing, and a control unit that controls the swinging mechanism. The swinging mechanism includes a rotation shaft inserted into a shaft insertion portion of the holder with play in a rotation direction. The control unit controls the rotation shaft to rotate and stop at a predetermined rotation angle position corresponding to a stack height of the sheets stacked on the processing tray, so that the holder is disposed at a contact position. At the contact position, the holder is allowed to swing in a retracting direction with respect to the rotation shaft within a predetermined play range. The play range is set to be larger in proportion to the stack height of the sheets.

A flange portion extending outward from a main shaft portion is disposed outside a side plate with respect to a position of an attachment member in a main direction when the attachment member is mounted to the side plate. A restriction slot is formed in the attachment member such that the flange portion can be fitted in and pass through the restriction slot. In the middle of the process where the attachment member is mounted to a second side plate in the main direction, the flange portion is fitted in the restriction slot, thereby the sheet detecting member is restricted from rotating, and one of a pair of projection portions of a sheet guide member is inserted in a hole of the attachment member.

A sheet feeder includes a sheet tray, a feed roller, a sheet feed frame, a contact element, a guide frame, a photosensor, a shield, and a linkage. The feed roller feeds a sheet on the sheet tray. The sheet feed frame holds the feed roller. The contact element is pivotable relative to the sheet feed frame. The guide frame is disposed below the sheet feed frame. The photosensor includes a light emitter and a light receiver. The shield is movable between a light transmission position and a light shield position. The linkage connects the contact element and the shield such that the shield is movable as the contact element pivots. The light receiver receives the light emitted from the light emitter when the shield is at the light transmission position. The shield at the light shield position shields the light receiver from the light emitted from the light emitter.