A post-processing apparatus includes a tray, a conveyor, a liquid applicator, a crimper, and a mover. The tray holds recording media on each of which an image is formed by an image forming apparatus. The conveyor conveys the recording media toward the tray in a conveyance direction of the recording media. The liquid applicator applies liquid to the recording media held in the tray at a binding position at which the recording media is bound. The crimper presses and deforms the recording media at the binding position to bind the recording media. The mover moves the liquid applicator and the crimper separately along a surface of the recording media held in the tray.

According to one embodiment, an image forming apparatus includes a conveyance system, a capacitance sensor, a processor, an image forming mechanism, and a tag writer. The conveyance system conveys paper. The capacitance sensor detects a value indicating the capacitance at a plurality of detection positions for the paper conveyed by the conveyance system. The processor detects that the paper conveyed by the conveyance system is provided with an RFID tag, and that the paper is being conveyed without overlapping with other paper based on the value indicating the capacitance detected at a plurality of detection positions by the capacitance sensor. If the processor detects that the paper is provided with an RFID tag and is conveyed without overlapping with other paper, the image forming mechanism forms an image on the paper. The tag writer writes data to the RFID tag provided on the paper on which the image forming mechanism forms the image.

An image reading apparatus which is capable of preventing occurrence of a paper jam and poor stacking during conveyance of originals. The image reading apparatus sets a type of an original, conveys the original based on the set type of the original, and reads an image on the conveyed original. An original detecting sensor detects placement of the original on an original tray. An LCD touch panel displays an object for setting a type of the original in response to the detection by the original detecting sensor.

An image reading apparatus includes: a reader that reads an image on a print medium, and is arranged at a reading position of a conveyance path for conveying the print medium that is continuous and has a long length; a shading unit including a reference color member to perform shading correction of correcting a read value of an image sensor in the reader; a mover that moves the shading unit between the reading position of the reader and a retreated position; and a retractor that retracts the print medium from the reading position of the reader, wherein the retractor arranges the print medium at the reading position of the reader at a time of reading by the reader, and retracts the print medium from the reading position of the reader at an end of reading by the reader, to secure a predetermined space between the reader and the print medium.

A cover that covers side surfaces of a document conveyance path and a paper feeder in a direction orthogonal to a document conveyance direction and a notifier that notifies information on a document placement section are included. The cover has a first side surface disposed along the document conveyance direction and a second side surface disposed from an end of the first side surface on the paper feeder side toward the document placement section. The notifier includes a displayer that displays the information by light. The displayer includes a first displayer disposed on the first side surface and a second displayer disposed on the second side surface toward the document placement section. The first displayer and the second displayer each have a horizontal length that is longer than a vertical length.

A reading device and an image forming apparatus. The reading device includes a reader disposed at a scanning position, the reader being configured to read an image formed on a surface of a sheet, a movement mechanism to move the reader between the scanning position and a separated position away from the scanning position, and a reference plate disposed at a first position facing a reading face of the reader, the reference plate being configured to obtain a reference value to be used when the reader reads the image. In the reading device, the reference plate rotates around an axis from a second position facing a side of the reader to the first position or from the first position to the second position in conjunction with movement of the reader from the scanning position to the separated position by the movement mechanism The image forming apparatus includes the reading device.

A document feeder includes a document placing tray on which a document is placed; a document discharging tray on which a document discharged from a document discharging port in a discharging direction is stacked; and a light source that radiates light to the document discharging tray. The document discharging tray is disposed below the document placing tray. The document discharging tray has a protruding portion protruding upward from the surrounding area. The light source is disposed within a region having a width that is the same as a document having a maximum size in the width direction.

A medium transport unit includes an upstream route in which a print sheet is transported, a first switchback route, a second switchback route, a first guide route, a second guide route, a guide flap configured to switch the route so that the print sheet in the upstream route is transported either toward the first guide route or toward the second guide route, a first discharge route from which the print sheet in the first switchback route is discharged, a second discharge route from which the print sheet in the second switchback route is discharged, and a downstream route passing between the first switchback route and the second switchback route and having an upstream end connected to a junction of downstream ends of the first discharge route and the second discharge route.

An image reading apparatus includes first and second first conveyance rollers, transparent members, reading units, and opposing rollers, and includes a driving unit. The first reading unit reads an image on a sheet first surface through the first transparent member at a first reading position. The first opposing roller is opposed to the first transparent member at the first reading position. The second reading unit reads an image on a sheet second surface through the second transparent member at a second reading position. The second opposing roller is opposed to the second transparent member at the second reading position. The second conveyance roller is arranged where a sheet trailing edge passes through the first reading position while the second conveyance roller conveys the sheet. The driving unit drives the first opposing roller so that a first opposing roller circumferential speed is faster than a second conveyance roller circumferential speed.

An image reading apparatus includes a transport section that can transport original documents along a transport path, a reading section configured to read images of the original documents transported by the transport section, an output controller configured to output data of the original documents read by the reading section, a multi-sheet feed detection sensor configured to detect a multi-sheet feed of the original documents transported by the transport section, and an instruction section configured to issue an instruction to disable multi-sheet feed detection by the multi-sheet feed detection section.