A post-processing device includes: a loading section that has a loading surface directed obliquely upward and in which a recording medium is loaded on the loading surface in a state where one end of the recording medium is directed downward; a supporting section that supports the one end of the recording medium loaded on the loading surface; a transporting mechanism that transports a plurality of recording media transported one by one toward the loading section by shifting and stacking the recording media in a transport direction, and sets an amount of shift of the recording media on the basis of a predetermined condition; and a transporting section that bends each of the plurality of recording media transported from the transporting mechanism by applying a transport force to an upper end of each of the recording media opposite to the one end in a state where the one end is in contact with the supporting section, and separates one by one the recording media and loads the recording media on the loading surface.

An image forming apparatus comprises a first conveyance unit, an image forming unit, a second conveyance unit, a stacking unit, and a control unit. The control unit controls, in a case where a sheet stacking condition of the stacking unit does not satisfy a predetermined stacking condition, the second conveyance unit to convey the sheet at a second conveyance speed that is faster than the first conveyance speed. The control unit controls, in a case where the sheet stacking condition of the stacking unit satisfies the predetermined stacking condition, the second conveyance unit to convey the sheet at a third conveyance speed that is slower than the second conveyance speed.

An image forming apparatus including: a photosensitive member; a charging unit; an exposure unit; a developing unit; a transfer unit; and a controller configured to control the photosensitive member, the charging unit, the exposure unit, the developing unit, and the transfer unit to form a measurement image on the sheet, and acquire read data on the measurement image output from a reading device, wherein the measurement image includes a first measurement image and a second measurement image, wherein the controller forms the first measurement image based on a first image signal value and forms the second measurement image based on a second image signal value different from the first image signal value, and wherein the controller detects a streak included in the first measurement image or the second measurement image and determines an error based on a detection result.

An image forming apparatus includes an image forming unit configured to form an image on a sheet, and a measuring unit configured to measure reflected light from the sheet, a backup roller configured to convey the sheet while pressing the sheet toward the measuring unit, and a generating unit configured to control the backup roller to convey the sheet, control the measuring unit to measure the reflected light from the sheet, and generate profile data corresponding to measurement results of the reflected light from a plurality of positions in a direction in which the sheet is conveyed.

An image forming apparatus includes a platen on which an original is to be placed, a feeder configured to feed an original placed on a tray, a sensor configured to detect a sheet on the tray, a lamp provided to the feeder, a reader configured to read the original placed on the platen and to read the original conveyed by the feeder, an image forming unit configured to form an image on a sheet, and a controller. The controller is configured to control the image forming unit to form a test image on a sheet, control the reader to read the test image formed on the sheet placed on the platen, control a density of the image to be formed by the image forming unit based on a reading result of the test image.

An image forming apparatus includes: an image formation part that forms an image on a paper sheet; a conveyor that includes a plurality of conveying members and conveys the paper sheet; a hardware processor that acquires information on a smudge on a paper sheet on which an image has been formed by the image formation part, and identifies, from the plurality of conveying members, one or more dirty conveying member(s) that may have caused the smudge based on at least one of the information on the smudge, information on the conveying members, and information on a job for image formation executed by the image formation part.

An image forming apparatus includes a platen on which an original is to be placed, a feeder configured to feed an original placed on a tray, a sensor configured to detect a sheet on the tray, a lamp provided to the feeder, a reader configured to read the original placed on the platen and to read the original conveyed by the feeder, an image forming unit configured to form an image on a sheet, and a controller. The controller is configured to control the image forming unit to form a first test image on a sheet, control the reader to read the first test image formed on the sheet placed on the platen, control a density of the image to be formed by the image forming unit based on a reading result of the first test image.

An image forming apparatus includes an image bearing member, an image forming portion, a transfer member, an applying portion, and an executing portion configured to execute an output operation for forming and outputting a chart formed on a recording material on which a plurality of test images are transferred by applying a plurality of voltages to the transfer member by the applying portion. The executing portion changes a change width per level of the test voltage so that the change width is a first change width in a case that a material of the recording material on which the chart is formed is a first material and so that the change width is a second change width different from the first change width in a case that the material of the recording material is a second material different from the first material.

An image forming apparatus includes an image forming device, a gradation adjustment mark adder and a hardware processor. The hardware processor monitors and adjusts a gradation characteristic based on a result of scanning a gradation adjustment mark. The hardware processor makes a determination as to whether to form the gradation adjustment mark overlapping an image area of an image based on image data. If it is determined to form the gradation adjustment mark overlapping the image area, the hardware processor controls the gradation adjustment mark adder to add gradation adjustment mark information to the image data in the image area.

Disclosed is an image forming apparatus for forming an image on a sheet, the image forming apparatus including an image forming unit configured to form an image on a photosensitive member with the photosensitive member rotating, and transfer the image formed on the photosensitive member onto the sheet to form the image on the sheet, a reading unit configured to read a measurement image formed on the sheet by the image forming unit, the measurement image including a first detection image for detecting density at positions different in an axial direction of a rotation axis of the photosensitive member of an image to be formed on the photosensitive member; and a second detection image for detecting density at positions different in a rotation direction of the photosensitive member of an image to be formed on the photosensitive member.