Provided is an image forming apparatus, including a photosensitive member, a latent image forming unit configured to form an electrostatic latent image on the photosensitive member, a developing unit configured to store developer containing toner and to develop the electrostatic latent image on the photosensitive member using the developer, a detector configured to detect an amount of the toner stored in the developing unit, and a supplying unit configured to supply toner to the developing unit.

An image forming apparatus capable of providing a management apparatus with data that can be utilized for data analysis other than detection of signs of abnormality while keeping down costs required to build and maintain a communication environment. The image forming apparatus has a sensor. In the image forming apparatus, second data for use in detecting a sign of abnormality is generated based on first data comprised of measured values obtained by the sensor. The second data is transmitted directly or indirectly to the management apparatus that detects the sign of abnormality. Wherein, the second data is data that indicates characteristics of the image forming apparatus and has a smaller data amount that that of the first data.

An image forming apparatus includes a conversion unit that converts image data based on a conversion condition, an image forming unit that forms an image based on the converted image data, a measurement unit that measures a measuring image, and a generation unit that controls the image forming unit to form a first measuring image while the image forming unit is continuously forming images, and generates the conversion condition based on first measurement data of the first measuring image and a first feedback condition. The generation unit controls the image forming unit to form a second measuring image during a period from when toner discharge processing has been performed until the image forming unit forms a subsequent image, and generates the conversion condition based on second measurement data of the second measuring image, and a second feedback condition with a larger correction amount than the first feedback condition.

An image forming apparatus for forming an image on a recording material by a plurality of color materials, the apparatus includes: a determination unit configured to determine, based on converted data that are converted from image data corresponding to each image formed by the plurality of color materials, values each relating to an area of a respective color material caused to adhere to a recording material; and a detection unit configured to detect, based on the values each relating to the area of the respective color material that the determination unit determines, an overlapping of color materials.

A positional deviation correction pattern includes a first and second pattern image portions adjacent in a sub-scanning direction at the same position in a main-scanning direction, with the same width in the main-scanning direction. Each image portion includes a first side extending in the sub-scanning direction, a second side continuing from one end of the first side and extending in a direction intersecting the sub-scanning direction, and a third side continuing from the other end and extending in a direction intersecting both the sub-scanning direction and the second side. The second sides have the same inclination angle to a virtual line parallel to the main-scanning direction. The third sides have the same inclination angle to the virtual line. A length of one image portion in the sub-scanning direction gradually increases from one end to the other end in the main-scanning direction, a length of the other image portion gradually decreases.

An image forming apparatus includes an image carrier that carries an image, a transfer body that transports a recording medium in a contact region between the image carrier and the transfer body, a pair of transport members that are disposed upstream of the contact region in a transport direction, and transport the recording medium to the contact region, a guide member that includes, between the contact region and the pair of transport members, a portion on a downstream side in the transport direction which serves as a free end portion and a portion on an upstream side in the transport direction which is supported in a cantilever state, that guides a non-transfer surface of the recording medium, that is elastically deformed, and that has a cutout, and a detection unit that detects an image on an outer peripheral surface of the image carrier on a optical path.

An image forming apparatus includes an image carrier that holds an image, which is formed by developing a latent image and which is transferred onto a recording medium, a developing device that is disposed adjacent to the image carrier and that develops the latent image, a light-reflection-type sensing unit that is disposed below the developing device in a vertical direction and that detects the image on the image carrier, and a guiding member that guides the recording medium, which is transported between the developing device and the sensing unit, and that covers an upper side of the sensing unit in the vertical direction in a state where a space is ensured on an optical path of the sensing unit.

An image forming apparatus includes: an image carrier; a developing unit which supplies a toner contained in a developer to the image carrier; a lubricant supply unit which supplies a lubricant to the image carrier; a lubricant amount detection unit which detects an amount of the lubricant which is supplied to the image carrier from the lubricant supply unit and is thereafter incorporated into the developing unit from the image carrier; and a control unit which controls the developing unit to discharge the lubricant from the developing unit according to the amount of the lubricant detected by the lubricant amount detection unit.

A method of controlling the ejection speed of a print job that includes, with a density module of a printing device, determining a density classifier based on a region of a plane where print fluid is to be printed for a plurality of sheets of media of a print job; determining a percentage of each sheet of media exceeding a threshold density classifier relative to a total sheet count of the print job; and, based on the percentage, initiating an assisted ejection of the print job from the printing device.

A color measurement device includes a conveying roller unit that conveys a sheet in a conveying direction, a color sensor that is movable in a direction orthogonal to the conveying direction and measures a color of an image formed on the sheet, a white reference plate having a reference surface for measurement by the color sensor for calibration of the color sensor, lifting rollers that move with the color sensor and retain the sheet, and slid-on members that protrude to a level higher than the reference surface in a perpendicular direction to the reference surface. When the color sensor moves such that at least part of the lifting rollers overlaps the white reference plate as viewed from the perpendicular direction, the lifting rollers are brought into contact with the slid-on members, whereby a space is formed between the lifting rollers and the reference surface.