An image forming apparatus includes a heater, first control circuitry, second control circuitry, and a detector. The heater is configured to heat an inside of the apparatus. The first control circuitry is configured to cause the apparatus to be in a standby state, a sleep state having smaller power consumption than the standby state, or a deep sleep state having smaller power consumption than the sleep state. The second control circuitry is configured to control an operation of the heater. The detector is configured to detect humidity of the inside of the apparatus. The first control circuitry causes the apparatus in the deep sleep state to periodically and temporarily return to the sleep state, and the second control circuitry operates the heater according to the humidity detected by the detector in the sleep state to which the apparatus has returned from the deep sleep state.

An image forming apparatus including: a temperature detecting unit configured to detect a temperature outside the image forming apparatus; a storage portion; and a control unit configured to execute a dew condensation eliminating operation for eliminating dew condensation in the image forming apparatus based on a detection result of the temperature detecting unit, wherein the control unit stores, in the storage portion, an execution time of the dew condensation eliminating operation executed when a power supply to the image forming apparatus is stopped during the dew condensation eliminating operation and determines, when the power supply to the image forming apparatus is started, whether or not to execute the dew condensation eliminating operation based on the execution time and a power supply stop continuing time from when the power supply is stopped to when the power supply is started.

An image forming apparatus includes an image forming device that forms an image on a sheet and executes predetermined image forming processing, a reception device that receives a user instruction, a sensor that acquires ambient temperature information, and at least one controller that prohibits execution of the predetermined image forming processing for a predetermined period if any of a plurality of conditions including a first condition and a second condition is satisfied, wherein the first condition is a condition that a plurality of pieces of temperature information acquired at a plurality of timings have a predetermined relationship and the second condition is a condition that a predetermined instruction is received.

An image reading device includes an image reading unit, a conductive member, a switching portion, and a switching control portion. The image reading unit includes a light emitting portion and a light receiving portion. The light emitting portion irradiates light on a document sheet that is conveyed while in contact with an upper surface of a plate-like contact member. The light receiving portion outputs image data corresponding to light reflected from the document sheet. The conductive member is provided on a lower surface of the contact member. The switching portion is switched between an on-state and an off-state so as to select between a state where the conductive member is grounded or a state where the conductive member is not grounded. The switching control portion controls switching of the switching portion.

An image forming apparatus includes a dew condensation removal unit configured to execute dew condensation removal processing if it is determined that dew condensation may have occurred in the image forming apparatus, a reception unit configured to receive a print job for instructing execution of print processing, a restriction unit configured to restrict the execution of the print processing during execution of the dew condensation removal processing, a display control unit configured to control a display unit to display a selection screen for selecting whether to execute or cancel the print processing based on the print job if the print job is received during the execution of the dew condensation removal processing, and a print control unit configured to control the print processing to be executed after completion of the dew condensation removal processing if the execution of the print processing is selected.

An image forming apparatus can include a communications circuit, a printer, and a controller. The communications circuit is configured to communicate with a networked image forming apparatus via a network. The printer is configured to form an image on a sheet. The controller includes a processor and a memory. The controller is configured to acquire sensor data from a sensor operatively coupled to the controller; determine, via the network, a relay image forming apparatus, the relay image forming apparatus having an operating rate being relatively lower than an operating rate of multiple image forming apparatuses including the image forming apparatus and the networked image forming apparatus; and transmit, via the relay image forming apparatus, the sensor data to a predetermined recipient apparatus.

A printing control system includes a processor configured to: in a case where printing device rows configured by a printing device and a device that executes post-processing of a printed matter printed by the printing device are operated in an identical environmental region, group plural printing device rows in which an optimum environmental condition set for each of plural printing device rows is within a preset range; detect an environmental state of the environmental region in which plural printing device rows are operated; and in a case where the detected environmental state is within a preset allowable range from the optimum environmental condition of certain plural printing device rows that are grouped, operate plural printing device rows that are grouped.

A developing device includes a developing unit, a rotating member that rotates in a predetermined direction to generate an airflow in a space that accommodates the developing unit, and first and second partitioning members. The first partitioning member is disposed between the developing unit and the rotating member, and has first and second openings that are each provided with an opening-closing mechanism and respectively disposed at upstream and downstream sides in a direction of the airflow generated when the rotating member rotates in the predetermined direction. The second partitioning member is disposed between the developing unit and an external space, and has third and fourth openings that are each provided with an opening-closing mechanism and respectively disposed at downstream and upstream sides in the direction of the airflow generated when the rotating member rotates in the predetermined direction.

A developing device includes a developing unit, a rotating member that rotates in a predetermined direction to generate an airflow in a space that accommodates the developing unit, and first and second partitioning members. The first partitioning member is disposed between the developing unit and the rotating member, and has first and second openings that are each provided with an opening-closing mechanism and respectively disposed at upstream and downstream sides in a direction of the airflow generated when the rotating member rotates in the predetermined direction. The second partitioning member is disposed between the developing unit and an external space, and has third and fourth openings that are each provided with an opening-closing mechanism and respectively disposed at downstream and upstream sides in the direction of the airflow generated when the rotating member rotates in the predetermined direction.

There is provided an operating environment evaluation system that includes a physical quantity acquisition unit and a generation unit. The physical quantity unit acquires a physical quantity indicating an operating environment of an image processing apparatus. The generation unit generates an operating environment properness level of the image processing apparatus based on the physical quantity that is acquired by the physical quantity acquisition unit.