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：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：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：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：US20100129093A1

公开(公告)日：2010-05-27

申请号：US12623839

申请日：2009-11-23

申请人： Masayoshi Nakayama ,  Shinichi Akatsu ,  Tomohide Takenaka

发明人： Masayoshi Nakayama ,  Shinichi Akatsu ,  Tomohide Takenaka

IPC分类号： G03G15/02

CPC分类号： G03G15/5037 ,  G03G15/5045 ,  G03G15/553

摘要： A device for determining an end of life of an organic photoreceptor includes a potential detecting unit that detects a residual potential of the organic photoreceptor, a temperature detecting unit that detects temperature of the organic photoreceptor in either one of a direct manner and an indirect manner, and a life determining unit that determines the end of life of the organic photoreceptor based on the residual potential detected by the potential detecting unit and the temperature detected by the temperature detecting unit.

摘要翻译： 用于确定有机感光体的寿命终止的装置包括检测有机感光体的残留电位的电位检测单元，以直接方式和间接方式检测有机感光体的温度的温度检测单元， 以及生命确定单元，其基于由所述电位检测单元检测的残留电位和由所述温度检测单元检测到的温度来确定所述有机感光体的寿命终止。

公开(公告)号：US08019239B2

公开(公告)日：2011-09-13

申请号：US12623839

申请日：2009-11-23

申请人： Masayoshi Nakayama ,  Shinichi Akatsu ,  Tomohide Takenaka

发明人： Masayoshi Nakayama ,  Shinichi Akatsu ,  Tomohide Takenaka

IPC分类号： G03G15/00

CPC分类号： G03G15/5037 ,  G03G15/5045 ,  G03G15/553

摘要： A device for determining an end of life of an organic photoreceptor includes a potential detecting unit that detects a residual potential of the organic photoreceptor, a temperature detecting unit that detects temperature of the organic photoreceptor in either one of a direct manner and an indirect manner, and a life determining unit that determines the end of life of the organic photoreceptor based on the residual potential detected by the potential detecting unit and the temperature detected by the temperature detecting unit.

摘要翻译： 用于确定有机感光体的寿命终止的装置包括检测有机感光体的残留电位的电位检测单元，以直接方式和间接方式检测有机感光体的温度的温度检测单元， 以及生命确定单元，其基于由所述电位检测单元检测的残留电位和由所述温度检测单元检测到的温度来确定所述有机感光体的寿命终止。

公开(公告)号：US09488931B2

公开(公告)日：2016-11-08

申请号：US14939057

申请日：2015-11-12

申请人： Makoto Yasuda ,  Jun Hitosugi ,  Takamasa Ozeki ,  Mutsuki Morinaga ,  Emiko Shiraishi ,  Wakana Itoh ,  Hitoshi Yamamoto ,  Takatsugu Komori ,  Kunio Hasegawa ,  Tadashi Kasai ,  Kazuaki Kamihara ,  Kazumi Kobayashi ,  Hiroyuki Kunii ,  Masaki Sukesako ,  Yuichi Aizawa ,  Masakazu Terao ,  Masayoshi Nakayama ,  Takuma Higa ,  Masahiro Katoh ,  Kohei Matsumoto

发明人： Makoto Yasuda ,  Jun Hitosugi ,  Takamasa Ozeki ,  Mutsuki Morinaga ,  Emiko Shiraishi ,  Wakana Itoh ,  Hitoshi Yamamoto ,  Takatsugu Komori ,  Kunio Hasegawa ,  Tadashi Kasai ,  Kazuaki Kamihara ,  Kazumi Kobayashi ,  Hiroyuki Kunii ,  Masaki Sukesako ,  Yuichi Aizawa ,  Masakazu Terao ,  Masayoshi Nakayama ,  Takuma Higa ,  Masahiro Katoh ,  Kohei Matsumoto

IPC分类号： G03G15/08

CPC分类号： G03G15/0824 ,  G03G15/0844 ,  G03G15/0849

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.

摘要翻译： 图像形成装置包括潜像载体; 包含双组分显影剂并包括显影剂承载体的显影装置，显影电压源和调色剂浓度检测器; 调色剂供应装置，用于向显影装置供应调色剂; 转移装置; 以及控制器，用于在图像形成期间将显影装置中的显影剂中的调色剂浓度保持在目标调色剂浓度。 控制器执行强制调色剂消耗，其中在抑制调色剂供应装置供应调色剂的同时，显影装置以预定的强制调色剂消耗时间将调色剂供给到潜像承载调色剂。 当调色剂浓度降低到低于目标调色剂浓度的规定调色剂浓度时，控制器完成强制调色剂消耗并执行消耗后调色剂供应操作。

公开(公告)号：US20160026109A1

公开(公告)日：2016-01-28

申请号：US14794025

申请日：2015-07-08

申请人： Masayoshi Nakayama ,  Takuma Higa ,  Hiroyuki Kunii ,  Masaki Sukesako ,  Kazuaki Kamihara ,  Masakazu Terao ,  Yuichi Aizawa ,  Masahiro Katoh ,  Kohei Matsumoto ,  Toshihiro Sugiyama

发明人： Masayoshi Nakayama ,  Takuma Higa ,  Hiroyuki Kunii ,  Masaki Sukesako ,  Kazuaki Kamihara ,  Masakazu Terao ,  Yuichi Aizawa ,  Masahiro Katoh ,  Kohei Matsumoto ,  Toshihiro Sugiyama

IPC分类号： G03G15/02 ,  G03G21/00

CPC分类号： G03G15/0275 ,  G03G21/06 ,  G03G21/08

摘要： An image forming apparatus includes a first electric charging unit having an electric discharge wire to uniformly electrify a surface of the electrostatic latent image bearer, a second electric charging unit having a second electric discharge wire to execute a pre-electric charge removal electric charging process by electrifying the surface of the electrostatic latent image bearer subsequent to a transfer process to transfer a toner image, and a first electric charge removing device to diselectrify the surface of the electrostatic latent image bearer by irradiating it with electric charge removing light subsequent to the pre-electric charge removal electric charging process. The first electric charge removing device is disposed within an electric discharge region of the second electric discharge wire on a downstream side of an extreme upstream edge of the electric discharge region of the second electric discharge wire in a rotational direction of the electrostatic latent image bearer.

摘要翻译： 图像形成装置包括具有放电线以使静电潜像载体的表面均匀充电的第一充电单元，具有第二放电线的第二充电单元，用于执行预充电去除充电过程， 在传送调色剂图像的转印处理之后对静电潜像承载体的表面通电，以及第一电荷去除装置，以通过在静电潜像承载体的表面上照射电荷去除光， 电荷去除充电过程。 第一电荷除去装置设置在第二放电线的放电区域中，在静电潜像承载体的旋转方向上位于第二放电线的放电区域的最上游边缘的下游侧。

公开(公告)号：US20160004192A1

公开(公告)日：2016-01-07

申请号：US14740992

申请日：2015-06-16

申请人： Wakana Itoh ,  Hiroyuki Kunii ,  Masayoshi Nakayama ,  Kazuaki Kamihara ,  Takuma Higa

发明人： Wakana Itoh ,  Hiroyuki Kunii ,  Masayoshi Nakayama ,  Kazuaki Kamihara ,  Takuma Higa

IPC分类号： G03G15/01

CPC分类号： G03G15/162

摘要： An image forming apparatus has a system speed of from 400 to 2,000 mm/sec and includes an endless intermediate transfer belt to transfer a sheet-shaped medium bearing an image formed of a toner. The intermediate transfer belt includes a first layer including at least a substrate; a second layer; and an electric resistance controlling material and has a surface resistivity of from 1×108 to 1×1013 Ω/□, a volume resistivity of from 1×106 to 1×1012 Ω·cm, and a surface roughness not greater than 50 μm. The toner includes a mother particle which is surface-treated with a fluidizer, comprising a charge controlling agent and at least two external additives which are inorganic particulate materials and particulate polymers formed of polymeric particulate materials or thermosetting resins adhering to the surface of the mother particle.

摘要翻译： 图像形成装置具有400至2000mm /秒的系统速度，并且包括环形中间转印带，用于转印承载由调色剂形成的图像的片状介质。 中间转印带包括至少包括基底的第一层; 第二层; 和电阻控制材料，其表面电阻率为1×10 8〜1×10 13Ω·cm，□体积电阻率为1×10 6〜1×10 12Ω·cm·cm，表面粗糙度为50以下 μm。 调色剂包括用流化器进行表面处理的母粒，其包含电荷控制剂和至少两种外部添加剂，其为无机颗粒材料和由聚合物颗粒材料或热固性树脂形成的颗粒聚合物，所述聚合物颗粒材料或附着于母粒子表面的热固性树脂 。

公开(公告)号：US09696654B2

公开(公告)日：2017-07-04

申请号：US15089275

申请日：2016-04-01

申请人： Masayoshi Nakayama ,  Takuma Higa ,  Hiroyuki Kunii ,  Masaki Sukesako ,  Kazuaki Kamihara ,  Yuichi Aizawa ,  Masahiro Katoh ,  Kohei Matsumoto

发明人： Masayoshi Nakayama ,  Takuma Higa ,  Hiroyuki Kunii ,  Masaki Sukesako ,  Kazuaki Kamihara ,  Yuichi Aizawa ,  Masahiro Katoh ,  Kohei Matsumoto

IPC分类号： G03G15/08 ,  G03G15/00

CPC分类号： G03G15/0849 ,  G03G15/0877 ,  G03G15/5058 ,  G03G15/556

摘要： An image forming apparatus includes an image bearer, an image forming device, a toner concentration detector, a toner supply device, an image density detector, and a controller including a memory device. At a predetermined timing before image formation is started, the controller adjusts a developing potential to adjust an image density of a detection toner image on the image bearer and drives the toner supply device or the developing device to adjust a toner concentration in the developing device. After the image formation is started, the controller drives the toner supply device to adjust the toner concentration, and, in a predetermined sheet interval, adjusts the target concentration based on the image density of the detection toner image formed in a non-image area of the image bearer. When the toner concentration is higher than the target concentration plus a threshold, the controller suspends image formation and readjusts the developing potential.