An image forming apparatus includes a developing member, a developer supply unit, a pulsating pump, and a correction unit. The developing member is to be supplied with a liquid developer from a supply member and is configured to develop an electrostatic latent image formed on an image carrier. The developer supply unit forms a closed space together with the supply member. The closed space stores the liquid developer. The pulsating pump is configured to feed the liquid developer to the closed space at a predetermined reference flow rate. The correction unit is configured to make a correction to achieve increase or decrease with respect to the reference flow rate according to presence or absence of image information used for forming the electrostatic latent image, in units of a predetermined processing length in a process direction intersecting a development width on the image carrier.

An image forming apparatus that determines presence or absence of bubbles with a simple configuration. The image forming apparatus forms an image on a sheet using a liquid developer including toner and carrier liquid. An exposure unit exposes a photosensitive member charged by a charging unit to form an electrostatic latent image. A development unit stores the liquid developer and develops the electrostatic latent image using the liquid developer. A supplying unit supplies toner and carrier liquid to the development unit. A light receiving unit receives light that is emitted from a light emitting unit and passes through the liquid developer in the development unit, and to output an output value based on a light receiving amount. A controller determines whether a bubble is generating in the liquid developer according to a period after the output value exceeding the first threshold until falling below a second threshold.

An image forming apparatus includes an image bearing member configured to bear a toner image formed using a liquid developer containing toner particles and a carrier liquid, a transfer member, an input portion into which information on a kind of a recording material is inputted, an adjusting device configured to adjust an amount of the carrier liquid of the toner image, and an executing portion configured to execute an operation of the adjusting device depending on the information when the toner image is in the adjusting position. The executing position executes either of a plurality of operations including a first operation in which the amount of the carrier liquid of the toner image is increased, a second operation in which the amount of the carrier liquid is decreased, and a third operation in which the amount of the carrier liquid is not adjusted.

A fluid detection apparatus to detect quantity of a fluid having flowability and stored in a casing includes an oscillator disposed outside the casing to output a frequency of an oscillation signal corresponding to a magnetic flux passing through a space near the oscillator, a vibrator made of material effecting the magnetic flux and disposed inside the casing, a vibration trigger disposed inside the casing to vibrate the vibrator, and circuitry to acquire frequency-related information related to the frequency of the oscillation signal output from the oscillator, detect the vibration of the vibrator based on a change of the frequency-related information, determine whether the vibration of the vibrator converges during a convergence-checking time period defined after the vibrator is vibrated by the vibration trigger, and detect the quantity of the fluid in the casing based on a convergence determination result of the vibration of the vibrator.

An integrated circuit includes a memory, a selecting circuit, and a calibration processing circuit. The memory stores parameter sets for a plurality of color plates. The selecting circuit selects, from the stored parameter sets for the plurality of color plates, a parameter set corresponding to a color plate to be detected by a density sensor. The density sensor is at least one of a plurality of density sensors provided for a printer. The calibration processing circuit executes a print density calibration process on the color plate to be detected based on the selected parameter set corresponding to the color plate to be detected and a value of the color plate detected by the density sensor.

An image forming apparatus includes an image bearing member configured to bear a toner image formed using a liquid developer containing toner particles and a carrier liquid, a transfer member, an input portion into which information on a kind of a recording material is inputted, an adjusting device configured to adjust an amount of the carrier liquid of the toner image, and an executing portion configured to execute an operation of the adjusting device depending on the information when the toner image is in the adjusting position. The executing position executes either of a plurality of operations including a first operation in which the amount of the carrier liquid of the toner image is increased, a second operation in which the amount of the carrier liquid is decreased, and a third operation in which the amount of the carrier liquid is not adjusted.

A waste toner container provided for use in an image forming apparatus includes: a body receiving, through an inlet, waste toner discharged from the image forming apparatus, and contains the waste toner; a conveyance member conveying the waste toner, which has been received through the inlet; a waste toner deposition chamber disposed downstream of the inlet in a waste toner conveyance direction such that the waste toner that has been conveyed is increasingly deposited therein, the chamber having a light-transmissive window through which amount of the deposited waste toner is optically monitorable from outside of the body; a conductive member disposed on an inner surface of the body so as to come into contact with the waste toner being conveyed; and a connection unit disposed between the conductive member and an earth member provided in the image forming apparatus to electrically connect between the conductive member and the earth member.

A developing device includes a hardware processor that performs control in which a developer circulation state is switched between a first state and a second state depending on states of the developer in the first and the second regions. The first state is a state in which a developer circulation path is formed in each of the first and the second regions, and the second state is a state in which a single developer circulation path is formed all through the first and the second regions.

An image forming apparatus includes an image forming portion configured to form an image with a liquid developer containing a toner and a carrier liquid, a separating device, a first carrier supplying device, a second carrier supplying device, and an accommodating portion configured to accommodate a carrier liquid supplied from the first carrier supplying device and a carrier liquid, in which a ratio of a first substance is smaller than that in the carrier liquid collected from the separating device or no first substance is contained, supplied from the second carrier supplying device. The carrier liquid accommodated in the accommodating portion is capable of being supplied to the image forming portion.

An image forming apparatus includes a processing unit, a sensor, and a processor. The processing unit has a developing device using a developer containing two components of a toner and a carrier. The sensor outputs a detection value corresponding to a toner concentration of the developer during operation of the processing unit. The processor performs a process of determining whether a service call to a service person is necessary based on the detection value of the sensor. The processor operates the processing unit at either a high process speed or a low process speed to acquire the detection value of the sensor, before determining whether the service call is necessary. The processor determines the process speed at which the processing unit is to be operated based on the detection value. The processor operates the processing unit at the determined process speed to determine whether the service call is necessary.