Matsushita Electric Industrial Co., Ltd.

Kyocera Document Solutions Inc.

Mita Industrial Co., Ltd.

Panasonic Corporation

Kyocera Mita Corporation

Ikeuchii & Sato

Masaru Watanabe

Hiroyuki Hazama

Tsumoru Ohata

Yasuaki Sakamoto

Ayato Morikami

Takashi Terada

Tousaku Nishiyama

Hirotsugu Ogawa

Yuki Nakaiwa

Koji Uno

Takuji Watanabe

Yasuhiro Ueyama

Keisuke Oba

Masahiro Tsutsumi

Kenichi Hayashi

Hideyuki Ogasawara

Kanako Kikuchi

Yukiko Yoshimura

Masanobu Maeshima

Tatsuo Mifune

Akira Matayoshi

Nobuhiro Hirano

Hidehiro Tabuchi

Kazuhiro Mizude

Kazunori Sakamoto

Isao Fujiwara

Hidekazu Sakagami

Satoshi Hirose

Nobuyuki Kamikihara

Noboru Masuda

Tetsuya Hayashi

Takahiko Murata

Yasuyuki Ishiguro

Eiichi Yasumoto

Hiroki Tanaka

Akihiro Horikawa

Yukio Hashimoto

Hiroyuki Hamakawa

Hiroyuki Tsuji

Keisuke Isoda

Junichi Oura

Fumihiko Yoshii

Atsushi Ishizaki

Hitoshi Mikuriya

Yukinori Akiyama

Katsuhiro Okamoto

Kiyoshi Kobata

Yorihito Ohana

Tadashi Ohba

Toshikazu Nakamura

Koji Nishida

Hiroaki Yamaguchi

Toru Ueno

Kazuhiro Kimura

Kaoru Okinaga

Hiroshi Maruyama

Kimihiro Nakano

Tumoru Ohata

An image forming apparatus includes an adjustment processing portion, an acquisition processing portion, and a determination processing portion. Each time an adjustment condition is satisfied during execution of an image forming process, the adjustment processing portion uses toner to adjust one adjustment target selected in accordance with a specific order among a plurality of adjustment targets related to image quality of an output image output by the image forming process. The acquisition processing portion acquires variation amount information related to an amount of variation in a state value related to an image forming portion caused by a start of the image forming process. The determination processing portion determines an adjustment target to be adjusted first after the start of the image forming process by the adjustment processing portion, based on the variation amount information acquired by the acquisition processing portion.

Image forming apparatus and image quality adjustment method capable of suppressing variation in image quality of output image immediately after start of image forming process

A toner concentration sensing apparatus includes a first acquisition processing portion, a second acquisition processing portion, and a third acquisition processing portion. The first acquisition processing portion acquires a first sensing value corresponding to light reflected by a first region of an image-carrying member where a toner image is not formed. The second acquisition processing portion acquires a second sensing value corresponding to light reflected by a second region of the image-carrying member where a toner image has been formed. The third acquisition processing portion acquires a component ratio of a component in the second sensing value, that corresponds to light reflected by toner adhered onto a surface of the image-carrying member, using a specific calculation formula determined based on a first relational expression based on the first sensing value and a second relational expression not based on the first sensing value, and the second sensing value.

Toner concentration sensing apparatus capable of accurately sensing toner concentration of toner image, image forming apparatus, and toner concentration sensing method

An image forming apparatus includes first to third adjustment processing portions. The first adjustment processing portion adjusts an emission light amount of a light-emitting portion of a first sensor based on an electric signal output from a light-receiving portion of the first sensor and corresponding to regular reflection light reflected by a non-toner-adhering surface of an image-carrying member. The second adjustment processing portion adjusts an operation condition of an image forming portion based on a toner concentration of a first toner image in a specific color, that has a concentration smaller than a predetermined saturation concentration. The third adjustment processing portion adjusts an emission light amount of a light-emitting portion of a second sensor based on an electric signal output from a light-receiving portion of the second sensor and corresponding to diffuse reflection light reflected by a second toner image in the specific color, that has a predetermined reference concentration.

Image forming apparatus capable of adjusting emission light amount of light-emitting portion, and light amount adjustment method

A processor causes a printing portion to execute, when first conveying processing is executed, test print processing for executing processing of forming a plurality of test toner images on a sheet under a print condition that differs for each of the plurality of test toner images. The processor acquires a plurality of first sensing densities when the first conveying processing is executed. The processor causes the printing portion to execute the test print processing when second conveying processing is executed. The processor acquires a plurality of second sensing densities when the second conveying processing is executed. The processor compares the plurality of first sensing densities and the plurality of second sensing densities to adjust the print condition in the print processing when the second conveying processing is executed.

Adjustment method for image forming apparatus, and image forming apparatus

A processor derives a plurality of unit density values which are each an average value of sensed densities for each of a plurality of unit areas sectioned for each unit length in a test toner image. The processor derives a weighted average of the plurality of unit density values to derive a test image density used for adjusting a control parameter in a printing portion. The unit length is a greatest common factor of two target lengths corresponding to perimeters of two types of target rotating members out of the plurality of rotating members. When a number of the plurality of unit areas is represented by n, n is a value obtained by subtracting 1 from an added value of a first constant and a second constant. The first constant and the second constant are values obtained by respectively dividing the two target lengths by the unit length.

Image density measurement method and image forming apparatus

An image forming apparatus includes a developing current detecting portion, a control portion, and a deviation detecting portion. The developing current detecting portion detects a developing current that flows between a developing device and a photoconductor drum during development of an electrostatic latent image. The control portion causes the exposure device to form electrostatic latent images of at least two patch images at different positions from each other and at different timings from each other in a main scanning direction. The deviation detecting portion detects deviation of one of the exposure device and the photoconductor drum with respect to the other based on a detection timing at which the developing current is detected during development of the electrostatic latent images of the at least two patch images.

Image forming apparatus capable of detecting deviation between exposure device and photoconductor drum

An image forming apparatus includes a transfer processing portion, a detection processing portion, a correction processing portion, and an adjustment processing portion. The transfer processing portion transfers a detection toner image to outside an output area of a transfer object to which a toner image as an output target is transferred from an image-carrying member. The detection processing portion detects a density of the detection toner image that has been transferred to the transfer object by the transfer processing portion. The correction processing portion corrects a detection result of the detection processing portion based on an amount of toner transferred from the image-carrying member to the output area at a transfer timing when the detection toner image is transferred. The adjustment processing portion adjusts an image forming condition based on the detection result after correction by the correction processing portion.

Image forming apparatus capable of adjusting image forming condition accurately, and image forming condition adjustment method

An image forming apparatus forms a coverage rate adjustment patch having a coverage rate corresponding to a difference between a coverage rate measured by a coverage rate measurement unit and a coverage rate of an adjustment image pattern together with an adjustment image pattern by using the exposure device and the developing device in the calibration.

Image forming apparatus

An image forming apparatus includes an image forming section, a controller, and storage. The storage stores therein a coverage rate of a past image specified by a past print job. The controller includes a determining section and a first calculating section. When a new print job is received, the determining section determines whether or not to perform a running-in operation by comparing a coverage rate of a new image specified by the new print job to the coverage rate of the past image stored in the storage. The first calculating section calculates an amount of toner to be supplied from a developing section to a photosensitive drum based on the coverage rate of the new image. The running-in operation is to supply the toner in the amount calculated by the first calculating section from the developing section to the photosensitive drum before the new image is formed on a sheet.

Image forming apparatus that determines whether to perform running-in operation

An image forming apparatus includes a developing section, storage, a first calculation section, a comparing section, and an executing section. The developing section develops an electrostatic latent image with toner. The storage stores coverage rates. The first calculation section calculates a first coverage rate and a second coverage rate. The comparing section compares the first coverage rate with the second coverage rate. The first coverage rate includes one or more coverage rates stored earlier in the storage than the second coverage rate. The second coverage rate includes coverage rates of a specified number of latest images individually formed on a specified number of sheets. A running-in operation is driving the developing section. The executing section executes the running-in operation.

Image forming apparatus capable of executing a running-in operation for a developing section

An image forming apparatus includes a developing section, storage, a first calculation section, a comparing section, and an executing section. The developing section contains toner and develops an electrostatic latent image with the toner. The storage stores coverage rates. The first calculation section calculates a first coverage rate and a second coverage rate. The comparing section compares the first coverage rate with the second coverage rate. The executing section executes a running-in operation based on a result of comparison by the comparing section. The first coverage rate includes one or more coverage rates stored earlier in the storage than the second coverage rate. The second coverage rate includes coverage rates of a specified number of latest images individually formed on the specified number of sheets. The running-in operation is driving the developing section.

A separator according to the present disclosure includes cellulose fibers and fluororesin particles.

Separator for nonaqueous electrolyte secondary battery and nonaqueous electrolyte secondary battery

A density correction unit (a) obtains density measurement values of a surface in a measurement section of an image carrier at a first round, (a) calculates as section background data at the first round respective differences between the density measurement values at the first round and an average value thereof, (a) obtains density measurement values of a surface at least in the measurement section at a second round, (a) calculates as section background data at the second round respective differences between the density measurement values at the second round and an average value thereof in a specific section with the same length as the measurement section, and (a) determines the rotation period on the basis of a correlation between the section background data at the first round and at the second round. Here the measurement section is a part in a circulating direction of the image carrier.

A separator according to the present disclosure is a separator for a non-aqueous electrolyte secondary battery that includes a porous layer that contains cellulose fibers and resin particles. The ratio of the amount of the resin particles to the total amount of the cellulose fibers and the resin particles increases with decreasing distance from one surface of the porous layer.

Separator for non-aqueous electrolyte secondary battery and non-aqueous electrolyte secondary battery

An image forming apparatus is provided to correct color misregistration and includes an image correcting unit. A toner density adjustment patch image forming section forms toner density adjustment patch images, and a toner density adjustment patch image misalignment measuring section measures amounts of misalignment of the images. Then, a color-misregistration correction patch image forming section forms color-misregistration correction patch images on a transfer member. A color-misregistration correcting section measures amounts of misalignment of the color-misregistration correction patch images to correct the color misregistration. The control unit controls the color-misregistration correction patch image forming section to change color-misregistration correction patch images to be formed in accordance with the amounts of misalignment of the toner density adjustment patch images measured by the toner density adjustment patch image misalignment measuring section.

Image forming apparatus and method for correcting color misregistration by the same

Growing community of inventors

Osaka, Japan

Masaru Watanabe