A processor selects a target sheet from a plurality of predetermined sheet candidates in accordance with selection information that is input via an input device. Furthermore, the processor derives feature information regarding a noise point from a target image that is obtained through an image reading process performed on an output sheet output from an image forming device, the noise point being a dot-like noise image included in the target image. Furthermore, the processor determines whether or not the noise point is a dot-like sheet noise by applying the feature information to a determination algorithm that corresponds to the target sheet, the sheet noise being included in a sheet of the output sheet itself, the determination algorithm being one of a plurality of determination algorithms that respectively correspond to the plurality of sheet candidates.

A printing system for printing on tabbed media having a plurality of tab positions. A media transport system picks the next sheet of tabbed media from a media tray. A detection system detects the tab position for the sheet of tabbed media. The detected tab position is compared to an expected tab position and if the detected tab position is different from the expected tab position then either the front end is used to supply image data to be printed on the sheet of tabbed media having the detected tab position, or the media transport system is controlled to direct the sheet of tabbed media into a waste receptacle and pick one or more additional sheets of tabbed media until the detected tab position is the same as the expected tab position.

An image forming apparatus includes an image forming portion configured to form a toner image on an image bearing member; an intermediate transfer member onto which the toner image is transferred from the image bearing member in a primary transfer portion to form an image portion; and a control portion configured to perform control to form a toner image for lubrication in a non-image portion of the intermediate transfer member onto which the toner image for a print image based on image information is not to be formed. In a state in which the non-image portion is to be formed downstream of the image portion in a movement direction of the surface of the intermediate transfer member, the control portion performs control to change a size of a region for forming the toner image for lubrication based on the image information.

An image forming apparatus includes a fixing portion and an optical sensor having first and second positioning holes and a connector. The fixing portion includes first and second screw holes, a through-hole, and an extension portion. If the optical sensor is placed on the fixing portion in a first orientation where the first positioning hole is aligned with the first screw hole and the second positioning hole is aligned with the second screw hole, the connector is inserted into the through-hole without interfering with the extension portion so that screws fix the optical sensor. If the optical sensor is placed on the fixing portion in a second orientation where the first positioning hole is aligned with the second screw hole and the second positioning hole is aligned with the first screw hole, the connector interferes with the extension portion so that the connector is not inserted into the through-hole.

An image forming apparatus includes an image forming unit configured to form an image on an image carrier, a transfer unit configured to transfer the image from the image carrier to a sheet, a reader configured to read a pattern image on the sheet while conveying the sheet, a sensor configured to measure a measuring image on the image carrier, and a controller configured to control the image forming unit to form the pattern image and the measuring image while forming images on a plurality of sheets, control the reader to read the pattern image, control the sensor to measure the measuring image, and generate an image forming condition based on a result of reading the pattern image by the reader and a result of measuring the measuring image by the sensor.

A printing system for printing on tabbed media having a plurality of tab positions. A media transport system picks the next sheet of tabbed media from a media tray. A detection system detects the tab position for the sheet of tabbed media. The detected tab position is compared to an expected tab position and if the detected tab position is different from the expected tab position then either the front end is used to supply image data to be printed on the sheet of tabbed media having the detected tab position, or the media transport system is controlled to direct the sheet of tabbed media into a waste receptacle and pick one or more additional sheets of tabbed media until the detected tab position is the same as the expected tab position.

A processor acquires an output image density which is a density detected for a first toner image. The processor causes a cleaning portion to perform toner recovery processing when a second toner image passes through a recovery member. The processor causes a transfer portion to execute primary transfer processing for toner on a target area on the surface of a photoconductor where the second toner image was formed. The processor acquires a remaining toner density which is a density detected for an area on the surface of an intermediate transfer member corresponding to the target area. The processor compares the output image density with the remaining toner density to derive an index value of toner recovery performance of the recovery member.

An image forming device, including: a drawer movable from an inside position where the drawer is located inside a housing to an outside position where the drawer is located outside the housing via an intermediate position; a stopper movable between a first position where the stopper stops the drawer from moving from the intermediate position to the outside position and a second position where the stopper allows the drawer to move from the intermediate position to the outside position; a drum cartridge mountable on the drawer; and a toner cartridge mountable on the drawer; wherein the toner cartridge mounted on the drawer is detachable from the drawer in a state in which the drawer is located at the intermediate position, and wherein the drum cartridge mounted on the drawer is detachable from the drawer in a state in which the drawer is located at the outside position.

A printing apparatus comprising a sheet conveyance path that includes a plurality of waiting positions at which a sheet in which printing has been performed on a first side in double-sided printing is caused to wait in order to print an image on a second side of the sheet, and is able to selectively execute first print control, second print control and third print control, retains information regarding a sheet to be fed in accordance with the first to third print control in a sheet feed wait queue, and selects and executes one of the first to third print control based on a printing order of single-sided printing and double-sided printing in the print job, the number of the plurality of waiting positions, and information retained in the sheet feed wait queue.

A belt device includes a first stretching member and a detector. The first stretching member stretches an endless belt capable of rotational movement. The detector detects a base of the belt and/or a density of a toner image on the belt. The first stretching member includes a first parallel area that is parallel to an axial direction, which is a direction of a rotation axis of the belt, and a first inclined area that is connected to an outer side of the first parallel area with respect to the axial direction and is inclined in a direction closer to the rotation axis. The detector detects a location corresponding to a first boundary between the first parallel area and the first inclined area or a location corresponding to a predetermined first adjacent area that is adjacent to and on an inner side of the first boundary.