摘要:
An image forming apparatus includes an image bearer, a toner image forming device, a plurality of image density detectors, and a controller. The plurality of image density detectors are disposed at predetermined intervals opposite the image bearer in a width direction of the image bearer. The controller causes the toner image forming device to form toner image patterns having an identical density at the plurality of positions on the image bearer and the plurality of image density detectors detects a density of the toner image patterns. Based on the detected density of the toner image patterns, the controller identifies multiple cyclic fluctuations of the density of the toner image patterns and adjusts an image forming condition based on the multiple cyclic fluctuations of the density of the toner image patterns to decrease an amplitude caused by the multiple cyclic fluctuations of the density of the toner image patterns.
摘要:
An image forming apparatus includes a toner pattern bearer to bear a first toner pattern having a first image area rate and a second toner pattern having a second image area rate different from the first image area rate. A toner adhesion amount detector detects a toner adhesion amount of toner of each of the first toner pattern and the second toner pattern. A toner degradation rate calculator calculates a first deviation in the toner adhesion amount of the first toner pattern and a second deviation in the toner adhesion amount of the second toner pattern based on the toner adhesion amount detected by the toner adhesion amount detector. The toner degradation rate calculator compares the first deviation with the second deviation and calculates a toner degradation rate based on a comparison result.
摘要:
An image forming apparatus includes a latent image bearer; a developing device containing two-component developer and including a developer bearer, a development voltage source, and a toner concentration detector; a toner supply device to supply toner to the developing device; a transfer device; and a controller to keep a toner concentration in the developer in the developing device at a target toner concentration during image formation. The controller executes forced toner consumption in which the developing device supplies the toner to the latent image bearer the toner at a predetermined forced toner consumption timing, while inhibiting the toner supply device from supplying toner. When the toner concentration falls to a prescribed toner density lower than the target toner concentration, the controller completes the forced toner consumption and executes a post-consumption toner supply operation.
摘要:
An image forming apparatus includes an image formation processor to perform image formation to a recording medium with a primary color toner and a secondary color toner that is different from the primary color toner, a database to store multiple setting values, each of which corresponding a combination of a mode type depending on the primary color toner and the secondary color toner and a media type of the recording medium and being applied to a process of the image formation performed by the image forming processor, a database retriever to retrieve an optimum setting value from the multiple setting values stored in the database according to a specified combination of the mode type and the media type, and an operation setting arranger to perform the image formation based on the optimum setting value acquired from the database retriever.
摘要:
An image forming apparatus includes a latent image bearer, a developing device, a supplier, and a controller. The controller controls the supplier according to a detection result of a toner density by the toner density sensor and a toner density target value to adjust the toner density of developer in the developing device. The controller is configured to correct the toner density target value and an imaging condition affecting a toner adhesion amount of an output image separately from the toner density, according to a component adhesion deterioration degree being a deterioration degree of carrier due to adhesion of a toner component, obtained based on at least an average image area ratio of the output image, and a coating abrasion deterioration degree being a progression degree of deterioration due to coating abrasion of the carrier, obtained based on at least the average image area ratio of the output image.
摘要:
A protective layer forming device, including: a powdery image bearer protecting agent formed of a granulated product containing a fatty acid metal salt and an inorganic lubricant; and a roller-shaped protecting agent supplying member configured to supply the powdery image bearer protecting agent to a surface of an image bearer.
摘要:
A processor, a memory medium for storing an operating system (OS) to be executed by the processor, one or more devices which are re-initialized upon OS restart, an active OS, and a standby OS are provided. The active OS is executed at system startup to initialize the devices, and executes an OS process in a normal state after the system startup. The standby OS is executed at system startup to detect the devices connected to the processor, and initialize the detected devices, and goes to standby. When an abnormality occurs in the active OS and a restart is needed, the standby OS re-initializes the devices by using re-initialization data for the devices which had been stored during the initialization process before going to standby.
摘要:
Timers #0 through #3 are each supplied with a period for prohibiting a change in a power supply voltage. An OS #A or an OS #B determines necessity to change an operating frequency for a CPU core corresponding to any of the timers #0 through #3 when the timer exceeds the prohibition period. It is determined whether it is necessary to change a power supply voltage supplied to CPU cores #0 through #3 when the OS #A or the OS #B determines necessity to change an operating frequency. When it is determined that a power supply voltage needs to be changed, a power supply voltage change portion 20 changes the power supply voltage supplied to the CPU cores #0 through #3. Therefore, it is possible to improve the processing efficiency without needing to acquire inter-OS lock.
摘要:
A method for producing electrophoretic particles includes dispersing particles having a charge on the surfaces thereof in an polar dispersion medium; adding a first polymerizable surfactant including a first polar group having a polarity opposite to the charge of the surfaces of the particles, a hydrophobic group, and a polymerizable group to the polar dispersion medium and mixing the liquid; adding a second polymerizable surfactant including a second polar group, a hydrophobic group, and a polymerizable group to the polar dispersion medium and emulsifying the mixture; and adding a polymerization initiator to induce polymerization reaction, thereby preparing electrophoretic particles in which the particles are coated with an organic polymer. In the method, the charge polarity and the amount of charge of the electrophoretic particles are controlled by setting the polarity of the second polar group included in the second polymerizable surfactant, and at least one condition of the number of the second polar groups in second polymerizable surfactant, the valence of the second polymerizable surfactant, and the molar amount of the second polymerizable surfactant added.
摘要:
A method for manufacturing an electronic device including a substrate and an organic thin film patterned in a predetermined shape includes: a) forming a coating film made of a first compound on a surface of the substrate, the first compound including a polymerization initiation site bindable with a second compound and inducing a cross-linking reaction responding to light; b) forming a first layer by site-selective irradiation of light on a region corresponding to the organic thin film of the coating film so as to pattern the coating film in the predetermined shape; and c) forming the organic thin film including the first layer and a second layer, the second layer being formed on the first layer by contacting a liquid including the second compound with the first layer so as to bind the polymerization initiation site and the second compound.