An image reading device includes a tray, a paper feed roller that conveys a sheet, a first sensor that detects a front end and a rear end of the sheet, a second sensor that detects the front end of the sheet, and a scanner that reads an image on a front side of the sheet and reads an image on a back side of the sheet. A controller determines a first time duration that elapses from the detection of the front end of the sheet by the first sensor to the detection of the rear end of the sheet by the first sensor and operates the scanner to read the image on the back side of the sheet over a second time duration equal in length to the first time duration. The second time duration begins after the front end of the sheet is detected by the second sensor.

An image forming apparatus includes a printing unit, a reversing unit, a writing unit, and a control unit. The printing unit forms an image on a sheet-like medium to which a wireless tag is attached. The reversing unit reverses a front and back of the medium. The writing unit writes data on the wireless tag. The control unit controls the reversing unit so that the medium is reversed twice upon the writing of data on the wireless tag failing and controls the printing unit so that an image indicating that the writing of data fails is formed on the medium reversed twice.

An image reading apparatus includes a conveyance unit, an image reading unit, a driving source, a first pulley, a second pulley, and a transmission belt. The conveyance unit including a first driving roller and a second driving roller and configured to convey a sheet. The image reading unit configured to read an image on the sheet conveyed by the conveyance unit at a reading position between the first driving roller and the second driving roller in a sheet conveyance direction. The driving source configured to output a driving force for driving the first driving roller and the second driving roller. The first pulley fixed to the first driving roller. The second pulley fixed to the second driving roller. The transmission belt wound around the first pulley and the second pulley. An outer diameter of the second pulley is smaller than an outer diameter of the first pulley.

An image reading device includes a tray, a paper feed roller that conveys a sheet, a first sensor that detects a front end and a rear end of the sheet, a second sensor that detects the front end of the sheet, and a scanner that reads an image on a front side of the sheet and reads an image on a back side of the sheet. A controller determines a first time duration that elapses from the detection of the front end of the sheet by the first sensor to the detection of the rear end of the sheet by the first sensor and operates the scanner to read the image on the back side of the sheet over a second time duration equal in length to the first time duration. The second time duration begins after the front end of the sheet is detected by the second sensor.

A peripheral with a pivotal turn-over guiding mechanism includes: a transporting mechanism; first to third passages; an image processing unit disposed on the first passage, wherein after the image processing unit performs a first image process on a first side of a medium, the transporting mechanism transports the medium into, partially out of and back into the second passage, into the third passage, and then into the first passage, and the image processing unit performs a second image process on a second side of the medium; and a guide member, which is rotatably disposed at a connection portion of the third passage, the second passage and the first passage, normally closes a forward path from the first passage to the second passage, and normally opens a reverse path from the second passage to the third passage.

An image forming apparatus includes an input unit configured to input image data, an image forming unit configured to form an image on a recording material based on the input image data, a reading unit configured to read the image formed on the recording material, and a control unit configured to, based on the input image data and the image read by the reading unit, acquire a plurality of change amounts from the read image, and determine a type of an abnormal image based on a plurality of the acquired change amounts.

An image forming apparatus includes a double-sided image forming portion capable of forming an image on each of first and second recording surfaces of a recording sheet, a double-sided image reading portion configured to acquire a pair of divided images each constituting a half of an original image, and an image forming control portion configured to supply a folded recording sheet folded in half to the double-sided image forming portion, and cause the double-sided image forming portion to perform processing of forming the pair of divided images on the first and second recording surfaces, respectively, of the folded recording sheet.

This disclosure is related to a duplex scanning device. The automatic document feeder includes a paper feeder body, a paper inlet and a paper outlet. The paper cassette includes an upper paper tray and a lower paper tray adjacent to the paper inlet and the paper outlet. The cassette power module includes a motor set and a transmission part. The transmission part drives the paper cassette to move on one side of the automatic document feeder to control the lower paper tray to connect with the paper inlet or the paper outlet. Therefore, the double-sided scanning of the document is completed by two-pass duplex scanning.

An image forming apparatus (1) includes a scanner unit (12U), a scanner housing (12), and a contactless card reader (42). The scanner unit (12U) optically reads an image of an original document to generate image data. The scanner housing (12) accommodates the scanner unit (12U). The card reader (42) has a flat information reading surface (421) and reads information recorded on an information card C. The scanner housing (12) has a confronting surface (12F) that a user confronts. The card reader (42) is mounted inside the scanner housing (12) such that the information reading surface (421) takes an upstanding posture, and is disposed behind the confronting surface (12F) of the scanner housing (12). The confronting surface (12F) of the scanner housing (12) includes a surface (41) that covers the information reading surface (421) and over which a card is held.

An image reading apparatus reads an image of a sheet conveyed from an image forming apparatus. The image reading apparatus includes a transparent member including a first surface disposed on a first side on which the sheet is conveyed and a second surface disposed on a second side opposite to the first side, an image reading portion disposed on the second side and configured to read the image of the sheet at a reading position through the transparent member, an elastic member disposed to abut against the second surface of the transparent member and configured to press the transparent member toward the first side, and a guide disposed upstream of the reading position and configured to guide the sheet to the reading position. A downstream end of the guide contacts with the first surface of the transparent member and presses the transparent member toward the second side.