公开(公告)号：US10599081B2

公开(公告)日：2020-03-24

申请号：US16103472

申请日：2018-08-14

申请人： Masashi Tachi ,  Takuma Higa ,  Masayoshi Nakayama ,  Masaki Sukesako ,  Tomohide Takenaka ,  Yuichi Aizawa ,  Kazuaki Kamihara ,  Keita Sone

发明人： Masashi Tachi ,  Takuma Higa ,  Masayoshi Nakayama ,  Masaki Sukesako ,  Tomohide Takenaka ,  Yuichi Aizawa ,  Kazuaki Kamihara ,  Keita Sone

IPC分类号： G03G15/16 ,  G03G15/00 ,  G03G21/16 ,  G03G15/06 ,  G03G15/02

摘要： An image forming apparatus includes a latent image bearer to bear a latent image, a potential sensor having a vibrator driven by a drive frequency to detect a surface potential of the latent image bearer, a developer bearer to bear developer that develops the latent image on the latent image bearer, and a power supply to apply a superimposed voltage obtained by superimposing an alternating voltage on a direct current voltage on the developer bearer. The frequency of the alternating voltage is not a multiple of the drive frequency and is a value obtained by adding a predetermined value to a multiple of the driving frequency.

公开(公告)号：US20190064719A1

公开(公告)日：2019-02-28

申请号：US16103472

申请日：2018-08-14

申请人： Masashi TACHI ,  Takuma Higa ,  Masayoshi Nakayama ,  Masaki Sukesako ,  Tomohide Takenaka ,  Yuichi Aizawa ,  Kazuaki Kamihara ,  Keita Sone

发明人： Masashi TACHI ,  Takuma Higa ,  Masayoshi Nakayama ,  Masaki Sukesako ,  Tomohide Takenaka ,  Yuichi Aizawa ,  Kazuaki Kamihara ,  Keita Sone

IPC分类号： G03G15/00 ,  G03G15/02 ,  G03G15/06 ,  G03G21/16

CPC分类号： G03G15/5037 ,  G03G15/0266 ,  G03G15/065 ,  G03G21/1676

摘要： An image forming apparatus includes a latent image bearer to bear a latent image, a potential sensor having a vibrator driven by a drive frequency to detect a surface potential of the latent image bearer, a developer bearer to bear developer that develops the latent image on the latent image bearer, and a power supply to apply a superimposed voltage obtained by superimposing an alternating voltage on a direct current voltage on the developer bearer. The frequency of the alternating voltage is not a multiple of the drive frequency and is a value obtained by adding a predetermined value to a multiple of the driving frequency.

公开(公告)号：US10241462B2

公开(公告)日：2019-03-26

申请号：US15714610

申请日：2017-09-25

申请人： Masayoshi Nakayama ,  Takuma Higa ,  Masaki Sukesako ,  Masashi Tachi ,  Kazuaki Kamihara ,  Yuichi Aizawa ,  Tomohide Takenaka ,  Kohei Matsumoto

发明人： Masayoshi Nakayama ,  Takuma Higa ,  Masaki Sukesako ,  Masashi Tachi ,  Kazuaki Kamihara ,  Yuichi Aizawa ,  Tomohide Takenaka ,  Kohei Matsumoto

IPC分类号： G03G15/00 ,  G03G21/00 ,  G03G15/01 ,  G03G15/09

摘要： An electrophotographic image forming apparatus includes a latent image bearer to rotate and bear a latent image, a charging device to charge the a latent image bearer, a developing device to develop the latent image with developer including toner and use a developing voltage including an AC component, and a lubricant applicator to apply lubricant onto a surface of the latent image bearer. An amount of the lubricant applied by the lubricant applicator onto the latent image bearer per centimeter in an axial direction of the latent image bearer is equal to or greater than 0.845 mg for a running distance of 1.0 kilometer of the latent image bearer, and a difference between a largest value and a smallest value of the developing voltage is in a range of 200 V to 400 V.

公开(公告)号：US10061226B2

公开(公告)日：2018-08-28

申请号：US15477576

申请日：2017-04-03

申请人： Kazuaki Kamihara ,  Yuuichiroh Uematsu ,  Tetsuya Muto ,  Tomohide Takenaka ,  Keita Sone ,  Keita Gotoh ,  Masahiko Shakuto ,  Takamasa Ozeki ,  Mutsuki Morinaga ,  Hitoshi Yamamoto ,  Keiko Kajimura

发明人： Kazuaki Kamihara ,  Yuuichiroh Uematsu ,  Tetsuya Muto ,  Tomohide Takenaka ,  Keita Sone ,  Keita Gotoh ,  Masahiko Shakuto ,  Takamasa Ozeki ,  Mutsuki Morinaga ,  Hitoshi Yamamoto ,  Keiko Kajimura

IPC分类号： G03G15/00 ,  G03G15/08

CPC分类号： G03G15/0855 ,  G03G15/0131 ,  G03G15/0189 ,  G03G15/0806 ,  G03G15/0856 ,  G03G15/0865 ,  G03G15/5058 ,  G03G15/556

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.

公开(公告)号：US07925174B2

公开(公告)日：2011-04-12

申请号：US12570332

申请日：2009-09-30

申请人： Masayoshi Nakayama ,  Shinichi Akatsu ,  Tomohide Takenaka ,  Takuma Higa

发明人： Masayoshi Nakayama ,  Shinichi Akatsu ,  Tomohide Takenaka ,  Takuma Higa

IPC分类号： G03G15/08

CPC分类号： G03G15/5058 ,  G03G15/0131 ,  G03G15/0848 ,  G03G15/5041 ,  G03G2215/00059 ,  G03G2215/00776 ,  G03G2215/0607

摘要： An image forming apparatus includes a latent image carrier, a developing unit to develop a latent image on the image carrier with developer including toner and carrier, a developer bearing member, a first detector to detect a toner adhesion amount per unit area of a toner image developed by the developing unit, a second detector to detect humidity, and a controller to calculate an index indicating toner chargeability of the carrier based on detection results of the toner adhesion amount obtained by the first detector and perform a given control process based on calculation results thereof and including a data storage unit to store an algorithm to correct the index to a specific value according to a specific humidity, based on detection results of the humidity obtained by the second detector. The controller corrects the index obtained based on the amount of toner adhesion based on the algorithm.

摘要翻译： 图像形成装置包括潜像载体，显影单元，用于在具有调色剂和载体的显影剂的图像载体上显影潜像，显影剂承载部件，第一检测器，用于检测调色剂图像的每单位面积的调色剂附着量 由显影单元显影，第二检测器检测湿度，以及控制器，基于由第一检测器获得的调色剂附着量的检测结果，计算载体的调色剂带电性的指标，并根据计算结果进行给定的控制处理 并且包括数据存储单元，其基于由第二检测器获得的湿度的检测结果，存储根据特定湿度将索引校正到特定值的算法。 控制器基于算法校正基于调色剂附着量获得的指数。

公开(公告)号：US09436135B2

公开(公告)日：2016-09-06

申请号：US14740175

申请日：2015-06-15

申请人： Keita Sone ,  Nobutaka Takeuchi ,  Shinichi Akatsu ,  Tomohide Takenaka ,  Kohta Fujimori ,  Tetsuya Muto ,  Akira Yoshida ,  Keita Gotoh ,  Yuuichiroh Uematsu ,  Kazufumi Kimura

发明人： Keita Sone ,  Nobutaka Takeuchi ,  Shinichi Akatsu ,  Tomohide Takenaka ,  Kohta Fujimori ,  Tetsuya Muto ,  Akira Yoshida ,  Keita Gotoh ,  Yuuichiroh Uematsu ,  Kazufumi Kimura

IPC分类号： G03G15/16

CPC分类号： G03G15/1615 ,  G03G15/5054 ,  G03G15/5062

摘要： An image forming apparatus includes an endless belt-shaped image bearer that is rotatably supported and entrained around rollers; a transfer member positioned to contact an outer surface of the image bearer; a transfer device to transfer a toner image conveyed while being carried on the outer surface of the image bearer onto a transfer medium conveyed between the image bearer and the transfer member; a toner image sensor to detect the toner image transferred onto the transfer medium; and a conveyance speed controller to fine-tune a conveyance speed of the transfer medium. Based on fine-tuning data of the conveyance speed controller, a detection result of the toner image sensor is corrected and image forming conditions are corrected based on the corrected detection result.

摘要翻译： 图像形成装置包括可旋转地支撑并夹带在辊周围的环形带状图像承载件; 定位成接触所述图像承载体的外表面的转印构件; 传送装置，用于将在承载在图像载体的外表面上的传送的调色剂图像转印到在图像载体和转印部件之间传送的转印介质上; 调色剂图像传感器，用于检测转印到转印介质上的调色剂图像; 以及微调转印介质的输送速度的输送速度控制器。 基于输送速度控制器的微调数据，校正调色剂图像传感器的检测结果，并且基于校正的检测结果校正图像形成条件。

公开(公告)号：US20160103408A1

公开(公告)日：2016-04-14

申请号：US14837587

申请日：2015-08-27

申请人： Keita Sone ,  Tomohide Takenaka

发明人： Keita Sone ,  Tomohide Takenaka

IPC分类号： G03G15/00 ,  G03G21/20

CPC分类号： G03G15/5037 ,  G03G15/043 ,  G03G21/20 ,  G03G21/203 ,  G03G2215/00054

摘要： An image forming apparatus includes a latent image bearer; a charger; an exposure device; a developing device; a potential detector to detect a surface potential at a detection position between an exposure position and a development position on the latent image bearer in a direction of rotation of the latent image bearer; and a potential controller to determine an image forming condition. The potential controller includes a potential calculator to calculate an exposed area potential based on a detected potential smaller in charging polarity than a potential threshold, out of the detected surface potential, and a threshold determiner to set the potential threshold between the exposed area potential and an unexposed area potential of the latent image bearer based on at least one of a change in the unexposed area potential, a change with time of the latent image bearer, and a change in an ambient condition.

摘要翻译： 图像形成装置包括潜像载体; 充电器 曝光装置; 显影装置; 电位检测器，用于检测在所述潜像载体的旋转方向上的所述潜像载体上的曝光位置和显影位置之间的检测位置处的表面电位; 以及用于确定图像形成条件的电位控制器。 电位控制器包括：电位计算器，用于基于在检测到的表面电位以外的电位极性小于电位阈值的检测电位来计算曝光区域电位;以及阈值确定器，用于将暴露区域电位和 基于未曝光区域电位的变化，潜像载体的随时间的变化以及环境条件的变化中的至少一个，潜像载体的未曝光区域电位。

公开(公告)号：US09535376B2

公开(公告)日：2017-01-03

申请号：US15044596

申请日：2016-02-16

申请人： Keita Sone ,  Shinichi Akatsu ,  Tomohide Takenaka ,  Tetsuya Muto ,  Akira Yoshida ,  Keita Gotoh ,  Yuuichiroh Uematsu

发明人： Keita Sone ,  Shinichi Akatsu ,  Tomohide Takenaka ,  Tetsuya Muto ,  Akira Yoshida ,  Keita Gotoh ,  Yuuichiroh Uematsu

IPC分类号： G03G15/00 ,  G03G15/16 ,  G03G21/20

CPC分类号： G03G15/1665 ,  G03G15/1605 ,  G03G15/1675 ,  G03G21/20

摘要： An image forming apparatus includes an image bearing belt of a multi-layer structure, a toner image forming device, a nip forming device, a transfer power source, an environment-condition detector, and a controller. The toner image forming device forms a toner image on a surface of the image bearing belt. The transfer power source outputs a transfer bias including a superimposed voltage, in which a direct current voltage is superimposed on an alternating current voltage to transfer the toner image from the image bearing belt onto a recording medium at a transfer nip. The environment-condition detector detects an environment condition. The controller controls the transfer bias output from the transfer power source to perform a bias switching process to switch the transfer bias between a transfer bias including the superimposed voltage and a transfer bias including a direct current voltage based on a detected result of the environment-condition detector.

摘要翻译： 图像形成装置包括多层结构的图像承载带，调色剂图像形成装置，压区形成装置，转印电源，环境条件检测器和控制器。 调色剂图像形成装置在图像承载带的表面上形成调色剂图像。 传输电源输出包括重叠电压的转印偏压，其中直流电压叠加在交流电压上，以将调色剂图像从图像承载带转印到转印压区上的记录介质上。 环境条件检测器检测环境条件。 控制器控制来自传送电源的传输偏压输出，以执行偏置切换处理，以根据环境条件的检测结果，在包括叠加电压的转印偏压和包括直流电压的转印偏压之间切换转印偏压 探测器。

公开(公告)号：US09513585B2

公开(公告)日：2016-12-06

申请号：US14837587

申请日：2015-08-27

申请人： Keita Sone ,  Tomohide Takenaka

发明人： Keita Sone ,  Tomohide Takenaka

IPC分类号： G03G15/00 ,  G03G21/20 ,  G03G15/043

CPC分类号： G03G15/5037 ,  G03G15/043 ,  G03G21/20 ,  G03G21/203 ,  G03G2215/00054

摘要： An image forming apparatus includes a latent image bearer; a charger; an exposure device; a developing device; a potential detector to detect a surface potential at a detection position between an exposure position and a development position on the latent image bearer in a direction of rotation of the latent image bearer; and a potential controller to determine an image forming condition. The potential controller includes a potential calculator to calculate an exposed area potential based on a detected potential smaller in charging polarity than a potential threshold, out of the detected surface potential, and a threshold determiner to set the potential threshold between the exposed area potential and an unexposed area potential of the latent image bearer based on at least one of a change in the unexposed area potential, a change with time of the latent image bearer, and a change in an ambient condition.

摘要翻译： 图像形成装置包括潜像载体; 充电器 曝光装置; 显影装置; 电位检测器，用于检测在所述潜像载体的旋转方向上的所述潜像载体上的曝光位置和显影位置之间的检测位置处的表面电位; 以及用于确定图像形成条件的电位控制器。 电位控制器包括：电位计算器，用于基于在检测到的表面电位以外的电位极性小于电位阈值的检测电位来计算曝光区域电位;以及阈值确定器，用于将暴露区域电位和 基于未曝光区域电位的变化，潜像载体的随时间的变化以及环境条件的变化中的至少一个，潜像载体的未曝光区域电位。

公开(公告)号：US20160246220A1

公开(公告)日：2016-08-25

申请号：US15044596

申请日：2016-02-16

申请人： Keita SONE ,  Shinichi Akatsu ,  Tomohide Takenaka ,  Tetsuya Muto ,  Akira Yoshida ,  Keita Gotoh ,  Yuuichiroh Uematsu

发明人： Keita SONE ,  Shinichi Akatsu ,  Tomohide Takenaka ,  Tetsuya Muto ,  Akira Yoshida ,  Keita Gotoh ,  Yuuichiroh Uematsu

IPC分类号： G03G15/16

CPC分类号： G03G15/1665 ,  G03G15/1605 ,  G03G15/1675 ,  G03G21/20

摘要： An image forming apparatus includes an image bearing belt of a multi-layer structure, a toner image forming device, a nip forming device a transfer power source, an environment-condition detector, and a controller. The toner image forming device forms a toner image on a surface of the image bearing belt. The transfer power source outputs a transfer bias including a superimposed voltage, in which a direct current voltage is superimposed on an alternating current voltage to transfer the toner image from the image bearing belt onto a recording medium at a transfer nip. The environment-condition detector detects an environment condition. The controller controls the transfer bias output from the transfer power source to perform a bias switching process to switch the transfer bias between a transfer bias including the superimposed voltage and a transfer bias including a direct current voltage based on a detected result of the environment-condition detector.

摘要翻译： 图像形成装置包括多层结构的图像承载带，调色剂图像形成装置，转印电源的压区形成装置，环境状态检测器和控制器。 调色剂图像形成装置在图像承载带的表面上形成调色剂图像。 传输电源输出包括重叠电压的转印偏压，其中直流电压叠加在交流电压上，以将调色剂图像从图像承载带转印到转印压区上的记录介质上。 环境条件检测器检测环境条件。 控制器控制来自传送电源的传输偏压输出，以执行偏置切换处理，以基于环境条件的检测结果，在包括叠加电压的转印偏压和包括直流电压的转印偏压之间切换转印偏压 探测器。