Fuji Xerox Co., Ltd.

Shunichiro Shishikura

Naoya Yamasaki

Masayuki Aratake

Shigeru Tsukada

Matsuyuki Aoki

Yasunori Unagida

Satoshi Tanaka

Kenjo Nagata

Toru Iwanami

Yoshinori Machida

Yasufumi Suwabe

Kiyoshi Shigehiro

Yoshiro Yamaguchi

Takeshi Matsunaga

Motohiko Sakamaki

Toshiaki Suzuki

Toru Yoshida

Atsushi Hirano

Yasutomo Ishii

Hiroaki Okuma

Ryo Fukuno

Daisuke Uchimitsu

Takeshi Yasuda

Hidefumi Tanaka

Shinichi Tsunoda

A developing device includes a container that contains a developer including a carrier and a toner; a transport member that is rotatably disposed in the container and that agitates and transports the developer in a rotation-axis direction thereof; a discharge outlet that has an opening in a side wall of the container facing in a direction perpendicular to the rotation-axis direction, the discharge outlet allowing the developer to be discharged to an outside of the container when a height of a surface of the developer becomes greater than a height of a lower surface of the discharge outlet; and a magnetic member that is disposed at a position that is above the lower surface of the discharge outlet and that overlaps the lower surface in an up-down direction, the magnetic member attracting a part of the developer that is lifted up by the transport member.

Developing device and image forming apparatus

An information processing apparatus includes an acquiring unit that acquires diagnosis information regarding an operating condition of an image forming apparatus that forms an image, a communication connection unit that establishes a communication connection with the image forming apparatus and a management server via a communication line, a storage controller that stores the diagnosis information acquired by the acquiring unit in a predetermined memory, where the storage controller reduces a data amount of the diagnosis information stored when a communication connection is not established to less than that stored when a communication connection is established, and a transmitting unit that transmits the diagnosis information stored in the memory to the management server if a communication connection is established by the communication connection unit.

Information processing apparatus, information processing method, image forming apparatus, image forming method, and computer readable medium

An information processing apparatus includes an acquiring unit that acquires an information item regarding an operating condition of an image forming apparatus, a first storage controller that stores the information item in a memory, an extracting unit that extracts samples from among the information items stored in the memory in accordance with a predetermined algorithm if an amount of space remaining in the memory is smaller than a predetermined threshold value, where the samples represent results of detection of the operating condition of the image forming apparatus, a statistical unit that computes a statistical value using the samples, a second storage controller that deletes the samples from the memory and stores the statistical value in the memory, and a transmitting unit that transmits the information items to a server via a communication line.

Information processing apparatus, image forming apparatus, information processing method, image forming method, and computer readable medium

An image forming apparatus includes an image reader that covers an image recorded material placed on a reading surface with an openable cover plate so as to press thereof and optically reads an image of the image recorded material, an image output unit that forms an image on a recording sheet and outputs the image, a detecting unit that detects an opened/closed state of the cover plate when the image output unit forms a gradation test image on the recording sheet, the recording sheet having the gradation test image formed thereon is placed on the reading surface of the image reader, and an operation of reading the gradation test image is performed, and a gradation correction unit that conducts a gradation correction of the image forming apparatus based on an image read by the image reader when the detecting unit detects the closed state of the cover plate.

Image forming apparatus

An image forming apparatus includes an image carrier and a detection unit. The image carrier is stretched around a plurality of rolls. The detection unit detects a density of a toner image formed on the image carrier, based on an amount of regularly reflected light from a surface of the image carrier. A detection length where the detection unit performs the detection in a movement direction of the image carrier is longer than a length, in the movement direction of the image carrier, of a deformation area where a deformation of the image carrier is caused.

The image forming apparatus is provided with: an image forming unit that forms an image on a medium; a speed changing unit that changes an image forming speed of the image forming unit; a detecting unit that detects a state quantity indicating a state of the image on the medium formed by the image forming unit; and an adjusting unit that adjusts an image forming condition set by the image forming unit according to a detection result of the state quantity detected by the detecting unit and a target value for the state quantity. The adjusting unit changes the target value for the state quantity according to the state quantity detected by the detecting unit after the speed changing unit changes the image forming speed.

Image forming apparatus, controlling unit, image forming method and computer readable medium

An image forming apparatus is provided with: an image forming unit that forms an image on a medium according an image forming condition; a speed changing unit that changes an image forming speed of the image forming unit between a plurality of image forming speeds including a first image forming speed; an adjusting unit that adjusts the image forming condition set in the image forming unit; a measuring unit that measures an elapsed state after the image forming condition is adjusted for the last time at the first image forming speed in the image forming unit, and outputs a measured value indicative of the elapsed state; and a determination unit that determines, according to the elapsed state, whether or not to adjust the image forming condition before the image forming unit starts forming an image at the first image forming speed.

Image forming apparatus, controller, computer readable medium and image forming condition adjustment method

An image forming apparatus includes: an image carrying member; a developing unit that develops an electrostatic latent image formed on the image carrying member using toner; a toner dispensing unit that dispenses the toner to the developing unit; and a toner dispense control unit that controls the toner dispensing unit in accordance with an operation speed of the developing unit or the image carrying member.

Image forming apparatus with a toner dispensing control unit

An image density control device includes a first detecting unit that detects a light amount of first specular reflected light which is reflected from a surface of an image carrier, a second detecting unit that detects a light amount of first diffuse reflected light which is reflected from an image on the surface of the image carrier, a surface change information acquiring unit that acquires a surface change information which shows changes with time, and a control unit that corrects the light amount of the first specular reflected light by using the surface change information to a light amount of second specular reflected light, and controls the density of the image by using the light amount of the first diffuse reflected light and the light amount of the second specular reflected light.

Image density control device and image forming apparatus

An image forming apparatus includes an image carrier on which an electrostatic latent image is formed, a rotary developing device having N developer carriers, where N defines a total number of developer carriers, the N developer carriers carrying developers to develop the electrostatic latent image, and the rotary developing device moves the N developer carriers to a development position opposite to the image carrier, and a toner concentration sensor that measures toner concentrations of the developers carried in the developer carriers. A measurement position of the toner concentration sensor is set on a second virtual straight line with the second virtual straight line having a first angle or an angle that is double the first angle toward a first virtual straight line on a rotation orbit of the rotary device, and the first virtual straight line connects a rotation center of the rotary developing device and the development position. The N developer carriers are placed in turn in an order starting from a first developer carrier to an N-th developer carrier at the same angular interval as the first angle on the rotation orbit of the rotary developing device, and an angular interval between the N-th developer carrier and the first developer carrier is set to a second angle greater than the first angle.

Image forming apparatus having a toner concentration sensor

An image display device and image display method are provided. The device and method can prevent changes in image density and contrast, which are caused by repeated displaying over long periods of time and changes in environment, by employing accurate electric current detection, due to the following operations. Voltage measurement is initiated with a detection circuit. Next, the application of drive voltage is initiated with a drive power source. An electric current value is calculated from the measured voltage value and the electric current value is temporarily stored. The electric current values are stored every set amount of time and the storage thereof accumulates. Application of the drive voltage is terminated and the integral value of the electric current is calculated in accordance with formulas.

Image display device and method

An image forming apparatus comprises: a rotary unit having a plurality of development devices provided around a rotary shaft, the development device including a constituent unit, wherein the plurality of the development devices move to a development position where the development devices sequentially oppose an image carrier by rotation of the rotary unit, and the development device in the development position develops an electrostatic latent image on the image carrier,

An image forming apparatus includes an image carrier on which an electrostatic latent image is formed, a rotary developing device having N developer carriers on a rotation orbit and moving the N developer carriers to a development position opposite to the image carrier, and a toner concentration sensor that measures toner concentrations of the developers. A measurement position of the toner concentration sensor is set on a second virtual straight line having a first angle toward a first virtual straight line that connects a rotation center of the rotary developing device and the development position. The N developer carriers are placed in turn in an order at the same angular interval as the first angle, and an angular interval between the N-th and first developer carriers is set to a second angle greater than the first angle.

An image forming apparatus includes a rotary unit that has a rotary shaft, and a plurality of development devices each of which has a constituent unit, the development devices provided around the rotary shaft; and a plurality of state detection units that detects at least one of states of the development devices and states of the constituent unit; wherein the rotary unit is rotated so that the development devices sequentially pass a development position facing a photosensitive member; wherein when any of the development devices is located at the development position, the development device makes an electrostatic latent image on the photosensitive member visible; and wherein each of the state detection units detects at least one of the development devices and the states of the constituent unit during a single stop of rotation of the rotary unit.

Image forming apparatus with a plurality of development devices

An image forming apparatus includes: an image carrier on which an electrostatic latent image is to be formed; a rotary development unit having a plurality of developer carriers that carry a developer used for developing the electrostatic latent image, the developer including toner, the plurality of the developer carriers being sequentially moved to a development position opposing to the image carrier, to switch a development color; and a toner concentration detection unit that detects the concentration of toner of the developer carried by one of the developer carriers located at the development position.

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Kanagawa, Japan

Shunichiro Shishikura