Abstract: An image forming apparatus capable of performing color misregistration correction at image forming speeds while reducing downtime. Image forming units form images of different colors. The formed images are transferred to an intermediate transfer belt. A pattern sensor detects color misregistration amounts of color patterns formed on the intermediate transfer belt. A CPU causes the image forming units to form first color patterns at a first speed and the pattern sensor to detect first color misregistration amounts, and causes the former to form second color patterns at a second speed different from the first speed and the latter to detect second color misregistration amounts. The CPU determines third color misregistration amounts at a third speed based on the first and second color misregistration amounts. The third speed is different from the first and second speeds.

Abstract: An image reading apparatus, including: a first distance detector configured to measure a first distance of the original conveyed after a sensor is changed from a first state detecting the original to a second state not detecting the original; a second distance detector configured to measure a second distance of the original conveyed after the second state is changed to the first state; and a controller configured to control a conveyor so that the conveyor starts a conveyance of a succeeding original when the second distance reaches a conveyance permission distance before the first distance reaches a hole detection distance and the conveyor stops the succeeding original when the second state is changed to the first state before the first distance reaches the hole detection distance, and thereafter starts the conveyance of the succeeding original when the first distance reaches the hole detection distance.

Abstract: A movement unit moves a reading unit in a first direction and a second direction. A control unit controls the movement unit so that the reading unit is positioned in a predetermined region in a case when a transition is made from an operation mode to a non-operation mode and controls the movement unit to cause the reading unit to move from the predetermined region to a position at which a white reference plate can be read in a case when a transition is made from the non-operation mode to the operation mode. The control unit causes movement of the reading unit by the movement unit to stop when a movement amount of the reading unit measured by a measurement unit becomes a movement amount corresponding to a distance from the boundary to a position at which a white reference plate can be read.

Abstract: In an image forming apparatus (100) an image forming unit forms a first image of a first color and a second image of a second color. An obtaining unit obtains information related to relative positions of a first measurement image, which formed on an image carrier, of the first color and a second measurement image, which formed on an image carrier, of the second color. A generation unit generates correlation data based on first information corresponding to a first image forming speed and second information corresponding to second information. A controller, in a case where the image forming unit forms an image at the second image forming speed, corrects relative positions of the first image and the second image based on the first information in advance and the correlation data.

Abstract: An image forming apparatus includes a stacking portion on which a sheet is to be stacked, an image forming unit, a size detection unit, a setting unit, a notification unit, and a control unit. The image forming unit forms an image on a sheet fed from the stacking portion. The size detection unit detects a size of a sheet stacked on the stacking portion. The setting unit sets at least one sheet size to be allowed for use at the image forming apparatus. The notification unit provides notification of information. The control unit causes the notification unit to provide a warning in a case where the size of the sheet detected by the size detection unit is not included in the at least one sheet size set by the setting unit.

Abstract: An image forming apparatus includes a generation unit configured to generate correlation data indicating a relationship between a relative position of a first image and a second image corresponding to a first speed and a relative position of the first image and the second image corresponding to a second image forming speed; a controller configured to, in a case where a image forming unit forms an image at the second speed, correct a relative position of the first image and the second image based on first information and on correlation data; and a prohibition unit configured to prohibit formation of the measurement image at the second speed in a case where a housing unit does not house a predetermined recording material corresponding to the second speed.

Abstract: An image forming apparatus includes a unit configured to correct a relative position of a first image and a second image, and a controller configured to form a first measurement image in a case where a first condition is satisfied, and to form the first measurement image and a second measurement image in a case where a second condition is satisfied. The controller is further configured to, in a case where the first condition is satisfied, determine whether or not the second condition is satisfied before the first condition is satisfied next, and in a case where the second condition is satisfied before the first condition is satisfied next, cause an image forming unit to form the first measurement image and the second measurement image.

Abstract: An image forming apparatus comprising: an image carrier; an image forming unit configured to form a toner image on the image carrier by using toner, based on image information; a transfer unit configured to transfer the toner image formed on the image carrier to a sheet; a cleaning unit configured to clean toner on the image carrier; a collected toner box in which the toner cleaned by the cleaning unit is collected; a rotating member configured to be rotated for moving the toner in the collected toner box; and a controller configured to control, based on the image information, whether or not to rotate the rotating member.

Abstract: An image forming apparatus includes a generation unit configured to generate correlation data indicating a relationship between a relative position of a first image and a second image corresponding to a first speed and a relative position of the first image and the second image corresponding to a second image forming speed; a controller configured to, in a case where a image forming unit forms an image at the second speed, correct a relative position of the first image and the second image based on first information and on correlation data; and a prohibition unit configured to prohibit formation of the measurement image at the second speed in a case where a housing unit does not house a predetermined recording material corresponding to the second speed.

Abstract: An image forming apparatus includes a generation unit configured to generate correlation data indicating a relationship between a relative position of a first image and a second image corresponding to a first speed and a relative position of the first image and the second image corresponding to a second image forming speed; a controller configured to, in a case where an image forming unit forms an image at the second speed, correct a relative position of the first image and the second image based on first information and on correlation data; and a prohibition unit configured to prohibit formation of the measurement image at the second speed in a case where a housing unit does not house a predetermined recording material corresponding to the second speed.

Abstract: An image forming apparatus comprising: an image carrier; an image forming unit configured to form a toner image on the image carrier by using toner, based on image information; a transfer unit configured to transfer the toner image formed on the image carrier to a sheet; a cleaning unit configured to clean toner on the image carrier; a collected toner box in which the toner cleaned by the cleaning unit is collected; a rotating member configured to be rotated for moving the toner in the collected toner box; and a controller configured to control, based on the image information, whether or not to rotate the rotating member.

Abstract: An image forming apparatus includes a unit configured to correct a relative position of a first image and a second image, and a controller configured to form a first measurement image in a case where a first condition is satisfied, and to form the first measurement image and a second measurement image in a case where a second condition is satisfied. The controller is further configured to, in a case where the first condition is satisfied, determine whether or not the second condition is satisfied before the first condition is satisfied next, and in a case where the second condition is satisfied before the first condition is satisfied next, cause an image forming unit to form the first measurement image and the second measurement image.

Abstract: An image forming apparatus includes: a generation unit configured to generate correlation data indicating a relationship between a relative position of a first image and a second image corresponding to a first speed and a relative position of the first image and the second image corresponding to a second image forming speed; a controller configured to, in a case where a image forming unit forms an image at the second speed, correct a relative position of the first image and the second image based on first information and on correlation data; and a prohibition unit configured to prohibit formation of the measurement image at the second speed in a case where a housing unit does not house a predetermined recording material corresponding to the second speed.

Abstract: An image forming apparatus includes a stacking portion on which a sheet is to be stacked, an image forming unit, a size detection unit, a setting unit, a notification unit, and a control unit. The image forming unit forms an image on a sheet fed from the stacking portion. The size detection unit detects a size of a sheet stacked on the stacking portion. The setting unit sets at least one sheet size to be allowed for use at the image forming apparatus. The notification unit provides notification of information. The control unit causes the notification unit to provide a warning in a case where the size of the sheet detected by the size detection unit is not included in the at least one sheet size set by the setting unit.

Abstract: A sheet processing apparatus which has a flattening processing unit which presses a folded end of a folded booklet bundle to flatten the folded end, and cutting units which cut and align edges of the booklet bundle, wherein the edges crossing the folded end of the booklet bundle are cut by the cutting unit and the folded end of the booklet is then flattened by the flattening processing unit.

Abstract: The present invention provides a sheet processing apparatus which includes a punch portion punching a hole at an end part of a sheet, and a push-out member discharging the sheet by pushing the end part of the sheet where the punch process is performed by the punch portion; and the push-out member discharges the sheet at a sheet discharging speed lower than a predetermined speed from the intermediate process tray in accordance with punch process information (i.e., combination of a size and a type of the sheet and number, a shape and a size of holes) that strength of a sheet end part is decreased by the punch process, and is lower than predetermined sheet strength capable of being discharged at the predetermined speed.

Abstract: A sheet processing apparatus includes a punch portion punching a hole at an end part of a sheet, and a push-out member discharging the sheet by pushing the end part of the sheet where the punch process is performed by the punch portion. The push-out member discharges the sheet at a sheet discharging speed lower than a predetermined speed from the intermediate process tray in accordance with punch process information (i.e., combination of a size and a type of the sheet and number, a shape and a size of holes) that strength of a sheet end part is decreased by the punch process, and is lower than predetermined sheet strength capable of being discharged at the predetermined speed.

Abstract: A sheet stacking apparatus includes a stack unit which includes a first stack tray and a second stack tray which can be individually elevated and is configured to stack a sheet on at least one of the first stack tray and the second tray, and a control unit configured to control the stack unit to stack the sheet in a first stack mode in which the sheet is stacked on at least one of the first stack tray and the second stack tray without being extended over the first stack tray and the second stack tray and a second stack mode in which the sheet is stacked on across the first stack tray and the second stack tray, the control unit capable of selecting the first stack mode and the second stack mode with respect to a same size sheet.

Abstract: A sheet processing apparatus which has a flattening processing unit which presses a folded end of a folded booklet bundle to flatten the folded end, and cutting units which cut and align edges of the booklet bundle, wherein the edges crossing the folded end of the booklet bundle are cut by the cutting unit and the folded end of the booklet is then flattened by the flattening processing unit.

Abstract: An image forming apparatus that enables to execute a bookbinding process for sheet bundles without decreasing productivity. The image forming apparatus is connected to a bookbinding apparatus having a bookbinding unit that binds a book by attaching a ring to a punch hole and a buffer unit that performs a buffering process to convey sheets in piles so that sheets for a next sheet bundle are not ejected onto a sheet bundle that is being processed by the bookbinding unit. A determination unit determines whether a sheet is a type that is prohibited from buffering. A control unit adjusts an ejection order so that the sheet of the type that is prohibited from buffering is not ejected within the predetermined number of sheets from the first sheet of sheets that constitute the sheet bundle, when the determination unit determines that the sheet is the type that is prohibited from buffering.