A sheet conveyer, including a body with a conveyer path, a first roller, a second roller, a roller holder supporting the second roller rotatably, an urging member urging the roller holder, and a guide member, is provided. The guide member is supported rotatably by the body at a position on a side opposite to the first roller across the second roller is pivotable between a closed position and an open position. The roller holder is movable between a first position, where the second roller contacts the first roller, and a second position, where the second roller is separated from the first roller and in which the roller holder contacts the guide member located at the open position. The roller holder located at the second position is restricted by the guide member from moving farther from the first position. The urging member urges the roller holder toward the first position.

A medium conveyance device includes a medium setting part on which a medium is set, a first roller coming in contact with the medium set on the medium setting part and sending out the medium in a conveyance direction, a second roller situated on a downstream side of the first roller in the conveyance direction and conveying the medium sent out by the first roller, and a medium contact part arranged in a conveyance path between the first roller and the second roller and coming in contact with the medium. The medium contact part has a plurality of contact surfaces switchable according to a type of the medium and differing in shape.

A winding unit includes a rail extending in an X direction, a support portion that is supported on the rail, that is movable in the X direction, and that is capable of supporting rolled medium, and a support mechanism that is supported on the rail and that is movable in the X direction. The support mechanism includes a placement portion capable of supporting the rolled medium from a vertically downward direction side, and a position adjustment unit that rises the placement portion in a vertically upward direction when the rolled medium is removed from the support portion. When viewed from a Y direction intersecting the X direction, a placement surface of the placement portion on which the rolled medium is placed is curved to be convex in the vertically upward direction.

A sheet post-processing apparatus includes a first regulating device regulating a position of a sheet bundle, by contacting to an end part of the sheet bundle conveyed in a conveying direction by a conveying device and stacked on a stacking device in a direction intersecting with the conveying direction; a second regulating device regulating a position of the sheet bundle in the conveying direction, by contacting to an end part of the sheet bundle stacked on the stacking device in the conveying direction; a first binding device configured to move from one side to another side of the sheet post-processing apparatus and from the other side to the one side by moving in the intersecting direction, and configured to bind a corner part of the sheet bundle using a staple, and a second binding device configured to bind a corner part of the sheet bundle without a staple.

A dual nip release mechanism includes: a rigid actuator body including a tail portion with a handle and a pivotally-mounted head portion having a nose member extending therefrom; a rocker arm pivotally mounted about a rocker arm shaft, the rocker arm having a proximal end for engagement with part of the nose member and a distal end engaged with a first shaft; and legs hingedly connected to the tail portion, each leg having a foot engaged with a second shaft and a heel for camming engagement with a fixed plate. During use, actuation of the handle causes simultaneous movement of the first and second shafts from a nip closed position to a nip open position via pivoting of the rocker arm and simultaneous camming engagement of the heel with the fixed plate.

An image forming apparatus of embodiments includes an accommodation unit and a notification unit. The accommodation unit accommodates both of a paper bundle and a packaging member therein in a state in which at least one of the paper bundle and the packaging member used to package the paper bundle satisfies predetermined conditions. The notification unit performs a notification of guidance on the predetermined conditions.

Disclosed herein is an image forming apparatus having a structure improved such that a user easily opens and closes a printing media cassette. The image forming apparatus includes an apparatus body, a printing media cassette to receive printing media, the printing media cassette being movably coupled to the apparatus body, a first lever provided at the printing media cassette, a second lever provided in the apparatus body, the second lever being coupled to the first lever, turning, and being separated from the first lever when the printing media cassette is closed.

A sheet feeder includes: a cassette main body; a side cursor; and a restriction part. The cassette main body houses a sheet to be fed in a predetermined sheet feeding direction. The side cursor is installed onto the cassette main body to be slidable in a sheet width direction perpendicular to the sheet feeding direction, and positions the sheet in the cassette main body. The restriction part increases sliding load of the side cursor with respect to the cassette main body when the side cursor slides and passes a standard size point that is a stopping position on the cassette main body when a sheet of a standard size is positioned.

A medium processing device is provided including: a conveyance section that conveys a sheet-shaped medium along a conveyance path; a drive transmission section that transmits drive force to the medium so as to cause the medium to travel along the conveyance path; an operation knob that is provided on an operation side face of the conveyance section, and that is used for operating the drive transmission section; and a storage box that stores the medium therein, and that is capable of transitioning between an opposing state in which the storage box opposes the operation side face of the conveyance section over a range including at least the operation knob, and a non-opposing state in which the storage box does not oppose the operation side face.

According to an aspect of the invention, a roll medium feeding shaft to be inserted into a through hole of a roll medium formed by winding a long recording medium is provided. The roll medium feeding shaft includes a holding member configured to be inserted into the through hole and to be rotated about a rotary axis together with the roll medium, a support part provided to one end of the roll medium feeding shaft and configured to support the holding member in a vertical direction when placed on a horizontal surface, and a shaft provided inside the holding member.