公开(公告)号：JP2015035004A

公开(公告)日：2015-02-19

申请号：JP2014232571

申请日：2014-11-17

Applicant: 株式会社リコー ,  Ricoh Co Ltd

Inventor： SHIMIZU YASUNOBU ,  HAGA KOKICHI ,  TAKENAKA TOMOKAZU ,  OGIYAMA HIROMI ,  SENGOKU KENJI ,  FUJITA JUNPEI

IPC: G03G15/16

Abstract: 【課題】転写モード切り替えの際に電流が逆流して誤動作したり電源基板が破損することを防止する。【解決手段】直流電圧による転写バイアスを印加して画像転写を行なう直流転写モードと、直流電圧に交流電圧を重畳した転写バイアスを印加して画像転写を行なう重畳転写モードとを切り替え可能な画像形成装置において、直流転写バイアスを印加するための直流電源201と、重畳転写バイアスを印加するための交流電源202を備え、転写モードを切り替える際に、直流電源201および交流電源202の出力をオフした状態で転写モードを切り替える。【選択図】図5

Abstract translation: 要解决的问题：为了防止电流反向流动，导致电源板的故障和损坏，当切换传送模式时。解决方案：一种图像形成装置，其可以在用于施加转印偏压的DC传输模式之间切换 执行图像传送的DC电压和用于施加通过将AC电压叠加在DC电压上而获得的转印偏压进行图像转印的叠加转印模式，包括：用于施加DC转印偏压的DC电源201和AC 用于施加叠加转印偏压的电源202。 当切换传送模式时，设备在直流电源和交流电源关闭的状态下切换传送模式。

公开(公告)号：JP2015022149A

公开(公告)日：2015-02-02

申请号：JP2013150158

申请日：2013-07-19

Applicant: 株式会社リコー ,  Ricoh Co Ltd

Inventor： SHIMIZU YASUNOBU ,  ASAMI AKIRA ,  KOIKE TOSHIO ,  YAMADA MASAAKI ,  OKAMOTO HIROAKI

IPC: G03G15/08

Abstract: 【課題】現像剤規制部材を通過する現像剤の混合状態を改善して画像濃度ムラの発生を抑制することを課題とする。【解決手段】供給室149A内からマグネットローラ147の磁力(N3極の磁力)により現像スリーブ141上に汲み上げて担持された二成分現像剤を、ドクタブレード146により規制した後に感光体ドラム12Yと対向する現像領域を通過させ、再び供給室内に戻す現像装置14Yにおいて、供給室内から現像スリーブ上に二成分現像剤を汲み上げる汲み上げ経路中に、汲み上げられる一部の二成分現像剤の汲み上げ方向への移動を阻害する現像剤分散部材151を設けた。【選択図】図5

Abstract translation: 要解决的问题：提高通过显影剂调节构件的显影剂的混合状态，以抑制图像浓度的不均匀的发生。显影装置14Y使得从内部泵送的双组分显影剂 通过磁性辊147的磁力（N3极的磁力）并承载在显影套筒141上的供给室149A在通过刮刀调节显影剂之后通过与感光鼓12Y相对布置的显影区域 146，并将显影剂再次返回到供应室。 显影装置14Y具有设置在泵送路径中的显影剂分散构件151，用于将双组分显影剂从供给室泵送到显影套筒上，以抑制部分泵送双组分显影剂在泵送方向上的移动。

公开(公告)号：JP2014186291A

公开(公告)日：2014-10-02

申请号：JP2013137137

申请日：2013-06-28

Applicant: Ricoh Co Ltd ,  株式会社リコー

Inventor： ASAMI AKIRA ,  KOIKE TOSHIO ,  OMURA TOMOYA ,  YAMADA MASAAKI ,  OKAMOTO HIROAKI ,  HATTORI YOSHIO ,  FUKUDA YOSHIYUKI ,  AKIYAMA SHO ,  KOJIMA TOSHIO ,  HIZUKA KYOTA ,  OSAWA MASAYUKI ,  KAMIYA NORIYUKI ,  SHIMIZU YASUNOBU ,  MORO YUKI

IPC: G03G15/08 ,  G03G9/10 ,  G03G15/09

Abstract: PROBLEM TO BE SOLVED: To develop images with a stable amount of toner without being affected by a toner consumption history of an immediately previous image, and provide uniform images having excellent color reproducibility for a long period.SOLUTION: A developer carrier 50 according to the present invention includes developer support means 51 that supplies a two-component developer G including a toner and a carrier to an electrostatic latent image formed on an image carrier 1, and has a rotatable cylindrical shape, and magnetic field generation means 55 that is provided and fixed inside the developer support means. The developer support means 51 has a surface 51a subjected to sand blast treatment, and the surface has an average surface roughness Ra of 4.0 μm or more and 8.0 μm or less.

Abstract translation: 要解决的问题：为了开发具有稳定量的调色剂的图像而不受紧接着的图像的调色剂消耗历史的影响，并且提供长时间具有优异的颜色再现性的均匀图像。解决方案：根据 本发明包括显影剂支撑装置51，其将包括调色剂和载体的双组分显影剂G供应到形成在图像载体1上的静电潜像，并且具有可旋转的圆柱形形状，以及磁场产生装置55， 固定在显影剂支撑装置内。 显影剂支撑装置51具有进行喷砂处理的表面51a，并且该表面的平均表面粗糙度Ra为4.0μm以上至8.0μm以下。

公开(公告)号：JP2011059626A

公开(公告)日：2011-03-24

申请号：JP2009212381

申请日：2009-09-14

Applicant: Ricoh Co Ltd ,  株式会社リコー

Inventor： SHIMIZU YASUNOBU

IPC: G03G15/00 ,  G03G15/01 ,  G03G21/00 ,  G03G21/10

Abstract: PROBLEM TO BE SOLVED: To suppress wasteful consumption of toner by preventing cleaning blade curling and cleaning failure and by efficiently forming a blade curling preventing pattern. SOLUTION: A toner image for use as a blade curling preventing pattern is formed between images, as shown in Figure. A cleaning blade cleans off a toner image for use as a blade curling preventing pattern. The shape of a blade curling preventing pattern is determined on the basis of the shape of an image quality adjustment pattern formed between immediately preceding images. COPYRIGHT: (C)2011,JPO&INPIT

Abstract translation: 要解决的问题：通过防止清洁刮板卷曲和清洁失败并且有效地形成刮板卷曲防止图案来抑制调色剂的浪费。 解决方案：如图所示，在图像之间形成用作刮板卷曲防止图案的调色剂图像。 清洁刮板清洁调色剂图像以用作刮板卷曲防止图案。 基于形成在紧接在前的图像之间的图像质量调整图案的形状来确定刮板卷曲防止图案的形状。 版权所有（C）2011，JPO＆INPIT

公开(公告)号：JP2010061013A

公开(公告)日：2010-03-18

申请号：JP2008228535

申请日：2008-09-05

Applicant: Ricoh Co Ltd ,  株式会社リコー

Inventor： YOSHIDA TAKESHI ,  YOSHII MASAKO ,  MAEDA ICHIRO ,  AOKI SHINJI ,  YURA JUN ,  SHIRAISHI EMIKO ,  OZAKI NAOYUKI ,  OGIYAMA HIROMI ,  SHIMIZU YASUNOBU ,  KOSUGE AKIO

IPC: G03G21/00 ,  G03G15/00 ,  G03G15/16 ,  G03G21/08

Abstract: PROBLEM TO BE SOLVED: To provide an image forming apparatus which obtains both an advantage of PTL and an advantage of switching of transfer bias in a non-image part. SOLUTION: The intermediate transfer type image forming apparatus which transfers a toner image on a photoreceptor 21 to an intermediate transfer belt 22 includes: a transfer bias applying means 6 for applying bias to a primary transfer bias roller 23; and an exposure member 27 for eliminating charge of the photoreceptor 21 before transfer after development. The image forming apparatus includes a control means 7 functioning as a mode switching means for switching between an image forming mode in which the charge of the photoreceptor 21 is eliminated by the exposure member 27 and an image forming mode in which the charge thereof is not eliminated, and a control means 7 functioning as a bias switching means for switching the transfer bias between an image part and the non-image part. In the image forming mode in which the charge is eliminated, switching of the transfer bias is not performed. COPYRIGHT: (C)2010,JPO&INPIT

Abstract translation: 要解决的问题：提供一种获得PTL的优点和非图像部分中的转印偏压的切换优点的图像形成装置。 将感光体21上的调色剂图像转印到中间转印带22上的中间转印型成像设备包括：向一次转印偏压辊23施加偏压的转印偏压施加机构6; 以及用于在显影后转移之前消除感光体21的电荷的曝光构件27。 图像形成装置包括控制装置7，其用作模式切换装置，用于在曝光构件27中消除感光体21的电荷的图像形成模式与不消除感光体21的图像形成模式之间进行切换 以及用作偏转切换装置的控制装置7，用于切换图像部分和非图像部分之间的转印偏压。 在消除电荷的图像形成模式中，不进行转印偏压的切换。 版权所有（C）2010，JPO＆INPIT

公开(公告)号：JP2009300847A

公开(公告)日：2009-12-24

申请号：JP2008156615

申请日：2008-06-16

Applicant: Ricoh Co Ltd ,  株式会社リコー

Inventor： SHIMIZU YASUNOBU

IPC: G03G21/10 ,  G03G15/01 ,  G03G21/00

Abstract: PROBLEM TO BE SOLVED: To provide a very reliable image forming apparatus stably applying bias over a long term, while preventing deterioration of a cleaning blade with lapse of time or a filming phenomenon of a photoreceptor from occurring in a stage for uniformly electrifying the photoreceptor after transfer.
SOLUTION: A lubricant coating means is disposed to be positioned between a first blade on an upstream side which cleans a surface of a latent image carrier after transferring a toner image obtained by visualizing a latent image on the latent image carrier to transfer material, and a conductive second blade on a downstream side to which DC high voltage is applied.
COPYRIGHT: (C)2010,JPO&INPIT

Abstract translation: 要解决的问题：为了提供一种稳定地长期施加偏压的非常可靠的图像形成装置，同时防止清洁刮板随时间流逝的劣化或感光体的成膜现象在均匀带电的阶段中发生 感光器转印后。 解决方案：润滑剂涂覆装置设置成位于上游侧的第一刮板之间，其在将通过将潜像载体上的潜像可视化而获得的调色剂图像转印到转印材料之后，清洁潜像载体的表面 以及施加有DC高电压的下游侧的导电性第二叶片。 版权所有（C）2010，JPO＆INPIT

公开(公告)号：JP2009294525A

公开(公告)日：2009-12-17

申请号：JP2008149534

申请日：2008-06-06

Applicant: Ricoh Co Ltd ,  株式会社リコー

Inventor： SHIMIZU YASUNOBU

IPC: G03G15/01 ,  G03G15/00 ,  G03G15/16

Abstract: PROBLEM TO BE SOLVED: To provide an image forming apparatus for setting optimum transfer conditions while suppressing toner consumption, thereby improving productivity and reliability.
SOLUTION: In a color image forming apparatus, primary transfer conditions for image carriers are determined in order from the upstream side based on the results of detection by both first and second reference pattern detecting means, the first reference pattern detecting means being configured to detect a reference pattern on an intermediate transfer body further downstream than the most downstream image carrier in the rotating direction of an intermediate transfer body, and the second reference pattern detecting means being configured to detect a reference pattern image on the most downstream image carrier.
COPYRIGHT: (C)2010,JPO&INPIT

Abstract translation: 要解决的问题：提供一种用于在抑制调色剂消耗的同时设定最佳转印条件的图像形成装置，从而提高生产率和可靠性。 解决方案：在彩色图像形成装置中，基于第一和第二参考图案检测装置的检测结果，从上游侧依次确定用于图像载体的一次转印条件，第一基准图案检测装置被配置 在中间转印体的旋转方向上检测比最下游图像载体更下游的中间转印体上的参考图案，并且第二参考图案检测装置被配置为检测最下游图像载体上的参考图案图像。 版权所有（C）2010，JPO＆INPIT

公开(公告)号：JP2014142570A

公开(公告)日：2014-08-07

申请号：JP2013022684

申请日：2013-02-07

Applicant: Ricoh Co Ltd ,  株式会社リコー

Inventor： OGIYAMA HIROMI ,  SHIMIZU YASUNOBU ,  TANAKA SHINYA ,  NAKAMURA KEIGO ,  ISHII KOICHI

IPC: G03G15/01 ,  G03G15/00 ,  G03G15/16

Abstract: PROBLEM TO BE SOLVED: To provide an image forming method and device with which reverse transfer is significantly reduced, and a reverse transfer rate is stabilized at the minimum reverse transfer rate, and thereby color reproducibility can be improved.SOLUTION: An image forming apparatus primarily transfers toner images formed on a plurality of photoreceptor drums respectively to an intermediate transfer belt, and secondarily transfers the toner images from the intermediate transfer belt to a recording medium. An electric field of the primary transfer of a colored toner in at least a second color later has a value with the magnitude of an electric field or less at which a reverse transfer rate of a toner in the previous color starts to increase. When a transparent toner or a white colorless toner is used for the first color, and the colored toner is used for the second color or later, the electric field of the primary transfer has a value with the magnitude of an electric field or less at which a reverse transfer rate of the previous color starts to increase.

Abstract translation: 要解决的问题：为了提供显着降低反向转印的图像形成方法和装置，并且以最小反向传送速率稳定反向传送速率，从而可以提高颜色再现性。解决方案：主要的成像装置 将形成在多个感光鼓上的调色剂图像分别转印到中间转印带上，然后将调色剂图像从中间转印带传送到记录介质。 至少第二种颜色的有色调色剂的一次转印的电场具有在前一种颜色中的调色剂的反向转印速率开始增加的电场幅度或更小的值。 当使用透明调色剂或白色无色调色剂用于第一种颜色时，并且彩色调色剂用于第二种颜色或稍后，一次转印的电场具有电场幅度或更小的值 前一种颜色的反向传输速率开始增加。

公开(公告)号：JP2014077981A

公开(公告)日：2014-05-01

申请号：JP2013101677

申请日：2013-05-13

Applicant: Ricoh Co Ltd ,  株式会社リコー

Inventor： TANAKA SHINYA ,  ISHII KOICHI ,  SHIMIZU YASUNOBU ,  NAKAMURA KEIGO

IPC: G03G15/16

CPC classification number: G03G15/16 ,  G03G15/1605 ,  G03G15/1675 ,  G03G2215/00717

Abstract: PROBLEM TO BE SOLVED: To provide an image forming apparatus capable of suppressing the occurrence of white spots while providing sufficient image density respectively in concave parts and convex parts on the surface of a recording material, so as to provide good images.SOLUTION: An image forming apparatus, when transferring a toner image on an image carrier to a recording medium, alternately switches a voltage in a transfer direction for transferring the toner image from the image carrier side to the recording material side and a voltage having polarity reverse to that of the voltage in a transfer direction; sets the time average value of the voltage (Vave) to the polarity in a transfer direction for transferring the toner image from the image carrier side to the recording material side, and closer to the transfer direction than the central value of the maximum value and the minimum value of the voltage (Voff); and reduces the (Duty) represented by A/(A+B) when the area on a return direction with respect to the central value (Voff) is A, and the area on the transfer direction side with respect to the central value (Voff) is B, each accounted for in one cycle of a voltage waveform, as concave and convex of the recording material to be used is larger.

Abstract translation: 要解决的问题：提供一种能够在记录材料的表面的凹部和凸部中分别提供足够的图像密度的同时抑制白点的出现的图像形成装置，以便提供良好的图像。解决方案：图像 在将图像载体上的调色剂图像转印到记录介质上时，在将图像载体侧的调色剂图像转印到记录材料侧的传送方向上交替地切换电压，并且具有与 传输方向的电压; 将电压（Vave）的时间平均值设定为用于将调色剂图像从图像载体侧转印到记录材料侧的传送方向上的极性，并且比传播方向更接近于最大值的中心值，并且 电压的最小值（Voff）; 并且当返回方向上的区域相对于中心值（Voff）为A时，减小由A /（A + B）表示的（占空比），并且转印方向侧的面积相对于中心值（Voff ）是B，每个在电压波形的一个周期中占用，因为要使用的记录材料的凹凸较大。

公开(公告)号：JP2013029809A

公开(公告)日：2013-02-07

申请号：JP2012110832

申请日：2012-05-14

Applicant: Ricoh Co Ltd ,  株式会社リコー

Inventor： TAKEUCHI TOMOKAZU ,  HAGA KOKICHI ,  SHIMIZU YASUNOBU ,  OGIYAMA HIROMI ,  SENGOKU KENJI ,  FUJITA JUNPEI ,  TANAKA SHINYA

IPC: G03G15/16 ,  G03G21/00 ,  G03G21/14

CPC classification number: G03G15/1675 ,  G03G2215/0129

Abstract: PROBLEM TO BE SOLVED: To suppress density unevenness or a reduction in density of an image even when voltage used in transfer of an image is different depending on a transferred body.SOLUTION: An image forming apparatus includes: a secondary transfer unit counter roller 63 that transfers a toner image on a recording sheet; a secondary transfer power source 200 that outputs either superposed voltage obtained by superposing DC voltage and AC voltage or DC voltage, and applies the voltage to the secondary transfer unit counter roller 63; and a power source control unit 142 that instructs the secondary transfer power source 200 to output the superposed voltage in a first timing at least for the DC voltage when the secondary transfer power source 200 outputs the superposed voltage, and instructs the secondary transfer power source 200 to output the DC voltage in a second timing that is later than the first timing when the secondary transfer power source 200 outputs the DC voltage.

Abstract translation: 要解决的问题：即使当图像的传送中使用的电压根据转印体而不同时，也可以抑制图像的浓度不均匀性或图像浓度的降低。 解决方案：图像形成装置包括：二次转印单元对辊63，其将调色剂图像转印到记录纸上; 输出通过叠加DC电压和AC电压或DC电压而获得的叠加电压的二次转移电源200，并将电压施加到二次转印单元对置辊63; 以及电源控制单元142，其指示在二次转印电源200输出叠加电压时至少对于DC电压的第一定时中的二次转印电源200输出叠加电压，并且指示二次转印电源200 以在二次转移电源200输出直流电压的第一定时晚的第二定时输出直​​流电压。 版权所有（C）2013，JPO＆INPIT