A test chart is obtained by printing a test chart image using an image forming apparatus for skew measurement of the image forming apparatus. The test chart includes a first scale image that includes a scale along a secondary scanning direction and a second scale image that includes a scale along the secondary scanning direction. The first and second scale images are arranged along a primary scanning direction. When a top-end part of the test chart is folded back, a top end of the test chart indicates different values from each other on the first and second scale images in accordance with a skew angle.

Provided is a double-channel paper feeding mechanism and a sheet medium processing device. The double-channel paper feeding mechanism includes a fixed frame, a movable frame and a connection mechanism. The fixed frame is provided with a first channel plate and a second channel plate. A first portion of the first channel plate and a first portion of the second channel plate form a conveying channel. An opening for inserting the movable frame is formed between second portions of the two channel plates. The movable frame is provided with a third channel plate and a fourth channel plate. When the movable frame is mounted on the fixed frame, the second portion of the first channel plate and the third channel plate are arranged oppositely and form a first input channel in connection with the conveying channel, the second portion of the second channel plate and the fourth channel plate form a second input channel in connection with the conveying channel.

An image forming apparatus includes: a housing; an image forming unit; a conveyor; a curved guide disposed downstream of the conveyor and configured to move between a near position where the curved guide in the housing guides the sheet and a far position farther from the conveyor than the near position; and a guide member extending from the conveyor toward the curved guide and configured to guide the sheet to the curved guide when the curved guide is located at the near position. The guide member has one end portion coupled to the conveyor and the other end portion movable with respect to the curved guide. When the curved guide is moved from the near position to the far position, the other end portion is moved in a direction from a downstream end toward an upstream end of the curved guide.

A test chart is obtained by printing a test chart image using an image forming apparatus for skew measurement of the image forming apparatus. The test chart includes a first scale image that includes a scale along a secondary scanning direction and a second scale image that includes a scale along the secondary scanning direction. The first and second scale images are arranged along a primary scanning direction. When a top-end part of the test chart is folded back, a top end of the test chart indicates different values from each other on the first and second scale images in accordance with a skew angle.

A sheet positioning member is provided on a sheet placing surface in such a way as to be movable in a predetermined first direction. The sheet positioning member includes a moving body, an abutting portion, an operation member, and a cam portion. The moving body moves in the first direction on the sheet placing surface. The abutting portion has an abutting surface that abuts on the side end portion when the sheet positioning member positions the sheet. The operation member is supported by the moving body so as to be pivotable around a support shaft that extends in the first direction, on a side of a back surface of the abutting portion. The cam portion displaces the abutting portion toward the side end portion by being pressed by the operation member in response to a pivoting operation of the operation member.

A sheet holding device includes a sheet placement surface and a sheet regulating member. A sheet is to be placed on the sheet placement surface. The sheet regulating member is movable in a contacting direction to contact and a separating direction to separate from an edge of the sheet placed on the sheet placement surface. The sheet regulating member includes a grip portion and a non-grip portion. The grip portion is configured to be gripped by a user to move the sheet regulating member. The non-grip portion is lower in height from the sheet placement surface than the grip portion. The non-grip portion has, on at least one end face in the contacting direction, a slope whose height from the sheet placement surface increases toward a center of the non-grip portion in the contacting direction or the separating direction.

The medium discharging apparatus includes a medium receiving portion that includes a first portion and a second portion that is provided on the first portion and that is configured to be displaced between a retracted position and an advanced position, a moving member configured to move between a first position and a second position, in which the moving member pushes and moves the second portion towards the advanced position as the moving member moves from the first position towards the second position and in which the moving member is moved to the first position as the second portion is displaced to the retracted position, a pushing member that pushes the moving member towards the second position, and a restricting member configured to switch between a restricting state that restricts a movement of the moving member towards the second position, and a non-restricting state that releases the restricting state.

A sheet stacking apparatus includes a sheet stacking portion to be mounted into and drawn out of a mounting portion and provided with a side plate including a grip portion by which the sheet stacking portion can be drawn out in the draw-out direction. The sheet stacking portion is supported to be slidable in a draw-out direction by a rail, and the rail is supported to be slidable in the draw-out direction by a rail supporting portion provided in the mounting portion. A rotator is provided on either the rail supporting portion or the rail and disposed in contact with the other of the rail supporting portion and the rail. The rail, the rail supporting portion and the rotator are disposed on one side in the width direction of the sheet stacking portion, and the grip portion is disposed on the other side in the width direction.

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.

An image forming apparatus includes an apparatus body, a wall face of the apparatus body having an ejection opening from which a sheet conveyed in a first direction is ejected, a sheet support to support the sheet discharged from the discharge opening in the first direction, and a mount to mount the sheet support to the apparatus body. The mount includes an abutting portion including an abutting face that contacts a wall face of the apparatus body, and a projection projecting in a second direction opposite to the first direction from the abutting face. The abutting face extends in a vertically downward direction from the projection, and the projection is fixed to the apparatus body in a vertical direction.