An image recording device is provided, having a recording unit configured to record an image on a sheet, and a tray disposed below the recording unit. The tray includes a sheet holding surface configured to hold the sheet. Additionally, the image recording device includes a sheet feeder disposed between the recording unit and the tray. The sheet feeder includes a roller for feeding the sheet from the tray. The roller is configured to move between a first roller position in which the roller contacts the sheet holding surface of the tray and a second roller position in which the roller is separated from the sheet holding surface. A return guide, disposed between the recording unit and the sheet feeder, defines a second conveying path to guide the sheet having an image recorded on one side thereof back to the feed guide. The return guide has a first opening configured to accommodate the roller of the sheet feeder when the roller is in the second roller position.

For a printing apparatus, a first conveyance speed for a first printing medium is determined according to first print data to be printed on the first printing medium and a second conveyance speed for a second printing medium is determined according to second print data to be printed on the second printing medium that follows the first printing medium along a conveying path. In a case where the second conveyance speed is equal to the first conveyance speed, a conveyance operation of the second printing medium is started before the first printing medium is discharged from the conveying path. In a case where the second conveyance speed is different from the first conveyance speed, the conveyance operation of the second printing medium is started after the first printing medium is discharged from the conveying path.

A medium transport device includes a first roller that applies a transporting force to a medium, a second roller that applies a transporting force to the medium transported from the first roller, a third roller that applies a transporting force to the medium transported from the second roller, a first rotor that transmits rotational torque to the third roller, a first shaft that is provided away from the first rotor at a first interval, and a second shaft that is provided away from the first rotor at the first interval and at a position different from a position of the first shaft. A shaft center of the first shaft and a shaft center of the second shaft are positioned on a circular arc, the center of which is a rotation center of the second roller.

The invention provides a paper path structure that is able to perform the following four functions: pass a sheet of paper through the paper path structure with is original orientation maintained; pass a sheet of paper through the paper path structure with its original orientation reversed; stack a sheet of paper in a stack repository with its original orientation maintained; and stack a sheet of paper in the stack repository with its original orientation reversed. The invention also provides a method to operate said paper path structure as well as a stacker and a printer comprising said paper path structure.

A sheet conveying apparatus includes a sheet conveying member; a guide portion configured to define a sheet conveying path; a pressing portion configured to press the sheet to curve the sheet as viewed in a sheet conveying direction in the sheet conveying path; and a moving portion movable by an edge of the sheet passing through the sheet conveying path and arranged so that at least a part of a movable range of the moving portion is overlapped with the pressing portion. The moving portion includes a first abutment portion configured to abut against the sheet passing through the sheet conveying path on one side in the width direction with respect to a conveyance center of the sheet conveying member and a second abutment portion configured to abut against the sheet passing through the sheet conveying path on the other side with respect to the conveyance center.

In an image forming apparatus capable of turning over a sheet to form images on both sides of the sheet, when duplex printing is executed successively on three or more sheets, a controller causes a first sheet conveyed from an image forming unit and a second sheet conveyed from the image forming unit to be guided into a first path by positioning a guide member in a first position, and then conveyed into a third path by a first roller, and causes a third and subsequent sheets conveyed from the image forming unit to be guided into a second path by positioning the guide member in a second position, and then conveyed into the third path by a second roller.

A recording apparatus includes a first medium transport path, a reverse path for reversing a surface of a medium, a third medium transport path that guides the medium to the reverse path, a first drive roller configured to rotate in a forward rotation direction that sends the medium toward a discharge port and in a reverse rotation direction opposite to the forward rotation direction, and a second drive roller provided in the third medium transport path and configured to rotate only in the forward rotation direction for sending the medium toward the reverse path, in which a transport force applied to the medium by the first drive roller when the first drive roller rotates in the forward rotation direction is stronger than a transport force applied to the medium by the second drive roller when the second drive roller rotates in the forward rotation direction.

A printing system includes a printing unit, a determination unit, and a switching unit. The printing unit prints an image on a recording medium. The determination unit compares a prestored reference image and a read image corresponding to a reading result of a printed document in which the image is printed on the recording medium and determines whether a result of the comparison satisfies a predetermined condition. The switching unit switches a discharge destination of the recording medium based on a result of the determination. The switching unit switches a conveyance path of the recording medium based on whether the determination is performed.

A drive transferring unit includes a first roller, a second roller, a first clutch, a second clutch, a transferring section, and a control section. The first roller includes a first shaft section. The second roller includes a second shaft section. The first clutch switches between enabling transfer of a driving force to the first shaft section and interrupting transfer thereof. The second clutch switches between enabling transfer of the driving force to the second shaft section and interrupting transfer thereof. The transferring section transfers the driving force from one of the first roller and the second roller to the other. The control section selects between first control in which the first clutch is in the on state and the second clutch is in the off state and second control in which the second clutch is in the on state and the first clutch is in the off state.

A liquid ejection apparatus includes a conveying unit, a winding unit, a printing unit, and a rotation control unit. The conveying unit is configured to intermittently convey a printing medium by a predetermined feed amount. The winding unit is configured to wind the printing medium conveyed by the conveying unit. The printing unit is configured to perform printing on the conveyed printing medium. The rotation control unit is configured to control the winding unit to rotate in a winding direction at a predetermined timing after the conveying unit has started to convey the printing medium intermittently, and then cause the winding unit to rotate in a reverse direction opposite to the winding direction.