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1. 发明授权

US4916547A Color image forming apparatus 失效
标题翻译：彩色图像形成装置
公开(公告)号：US4916547A
公开(公告)日：1990-04-10
申请号：US198855
申请日：1988-05-26
申请人： Akio Katsumata , Mitsuo Hasebe , Yoshihiro Mitekura , Hiroshi Hosaka , Itaru Matsuda , Kotaro Yonenaga , Takayuki Maruta , Masaaki Kogure
发明人： Akio Katsumata , Mitsuo Hasebe , Yoshihiro Mitekura , Hiroshi Hosaka , Itaru Matsuda , Kotaro Yonenaga , Takayuki Maruta , Masaaki Kogure
IPC分类号： G03G15/01 , G03G15/16 , H04N1/50
CPC分类号： H04N1/506 , G03G15/0194 , G03G2215/0119 , G03G2215/0161
摘要： An image forming apparatus of the type producing a single composite color image on a paper which is transported by a belt by transferring image components of different colors to the paper in register with each other. The apparatus reduces with a simple construction the positional deviation of the image components which occurs in an intended direction of paper transport. Recording devices individually adapted for black, cyan, magenta and yellow are arranged side by side. Pattern images for measurement each being associated with a respective one of those colors are formed on the belt. A timing at which each of the pattern images arrives is sensed and counted. The count is compared with a reference value to calculate an amount of deviation. Write start timing signals each being associated with a particular color are generated which are individually variable on the basis of the deviation calculated. The pattern images of the respective colors are each generated by using a write start timing associated with the color as a reference, and the pattern to be provided by any of the recording devices is outputted on a downstream side of the belt relative to the pattern to be provided by another recording device which is located downstream of the first-mentioned recording device.
摘要翻译：一种在纸张上产生单一复合彩色图像的图像形成装置，其通过将不同颜色的图像分量传送到纸张而被传送的纸张彼此对准。该装置以简单的结构减少了在纸张传送的预期方向上发生的图像分量的位置偏差。分别适用于黑色，青色，品红色和黄色的记录装置并排布置。在带上形成有与这些颜色中的相应颜色相关联的用于测量的图案图像。每个图案图像到达的定时被感测和计数。将计数与参考值进行比较以计算偏差量。生成与特定颜色相关联的写入开始定时信号，其基于计算的偏差而单独变化。各颜色的图案图像各自通过使用与颜色相关联的写入开始定时作为基准来生成，并且由任何记录装置提供的图案相对于图案在带的下游侧输出到由位于第一记录装置下游的另一记录装置提供。

2. 发明授权

US5424809A Image forming method and apparatus for the same 失效
标题翻译：图像形成方法及装置
公开(公告)号：US5424809A
公开(公告)日：1995-06-13
申请号：US31015
申请日：1993-03-11
申请人： Noboru Sawayama , Yoshihiro Mitekura , Takayuki Maruta , Katsuhiro Aoki , Koji Okabayashi
发明人： Noboru Sawayama , Yoshihiro Mitekura , Takayuki Maruta , Katsuhiro Aoki , Koji Okabayashi
IPC分类号： G03G15/00 , G03G15/01 , G03G21/00
CPC分类号： G03G15/5041 , G03G15/01 , G03G2215/00042
摘要： An image forming method and an apparatus therefor applicable to a color copier. A signal value representative of a reflection and appearing when the output of a photosensor is minimum in response to a change in the amount of toner deposition on a photoconductive element is detected. This maintains the density of a predetermined reference pattern used to sense an image density constant despite the change in, for example, the reflection characteristic of the photoconductive element. A bias for development is so changed as to maintain the output of the photosensor constant, so that the effective bias remains constant relative to the charge potential on the photoconductive element.
摘要翻译：一种适用于彩色复印机的成像方法及其装置。检测出响应于光电导元件上的调色剂沉积量的变化而使光电传感器的输出最小时的反射和出现的信号值。尽管例如光电导元件的反射特性发生变化，仍然保持用于感测图像密度常数的预定参考图案的浓度。为了保持光电传感器的输出恒定，发展的偏向被改变，使得有效偏置相对于光导元件上的电荷电位保持恒定。

3. 发明授权

US5298944A Testing image density to control toner concentration and dynamic range in a digital copier 失效
标题翻译：测试图像浓度以控制数码复印机中的色粉浓度和动态范围
公开(公告)号：US5298944A
公开(公告)日：1994-03-29
申请号：US92940
申请日：1993-07-19
申请人： Noboru Sawayama , Takayuki Maruta , Mitsuo Hasebe
发明人： Noboru Sawayama , Takayuki Maruta , Mitsuo Hasebe
IPC分类号： G03G15/00 , G03G15/01 , G03G21/00
CPC分类号： G03G15/01 , G03G15/5041 , G03G2215/00042
摘要： A developing system of the type using a two-component developer and capable of reproducing image densities and halftone images stably with no regard to changes in ambient conditions and aging. At least two toner image patterns each having a different toner density are formed on a photoconductive element. The amounts of toner deposited on the individual patterns are sensed by a photosensor, while the supply of toner to a developer and the dynamic range of a latent image are controlled in combination in response to the output of the photosensor.
摘要翻译：这种类型的显影系统使用双组分显影剂并且能够稳定地再现图像浓度和半色调图像，而不考虑环境条件和老化的变化。在感光元件上形成各自具有不同调色剂密度的至少两个调色剂图像图案。通过光电传感器感测沉积在各图案上的调色剂的量，同时响应于光传感器的输出而组合地控制向显影剂供应调色剂和潜像的动态范围。

4. 发明授权

US5826146A Color image forming device which changes developing bias when switching between developer units 失效
标题翻译：在显影单元之间切换时改变显影偏压的彩色图像形成装置
公开(公告)号：US5826146A
公开(公告)日：1998-10-20
申请号：US870555
申请日：1997-06-06
申请人： Takayuki Maruta , Hiroshi Takashima , Tomoji Ishikawa , Kazuyuki Sugihara , Shinji Kato , Katsuhiro Kosuge
发明人： Takayuki Maruta , Hiroshi Takashima , Tomoji Ishikawa , Kazuyuki Sugihara , Shinji Kato , Katsuhiro Kosuge
IPC分类号： G03G15/01 , G03G15/06 , G03G15/08
CPC分类号： G03G15/0121 , G03G15/065 , G03G2215/0177
摘要： An image forming device includes a plurality of developing devices and a photosensitive drum. Each of the developing devices includes a developer carrying roller. One of the developing devices is moved to a developing position confronting the photosensitive drum which is formed with a latent image. A first developing bias including a d.c. component and an a.c. component is applied to the developer carrying roller and developer on the developer carrying roller is rendered in contact with the latent image on the photosensitive drum so that the latent image is developed. On the other hand, when the developer on the developer carrying roller comes in contact with and separates from the photosensitive drum due to the movement of the developing device, a second developing bias is applied to the developer carrying roller. The second developing bias generates an electric field where the developer on the developer carrying roller is more reluctant to move toward the photosensitive drum as compared with the first developing bias. The second developing bias may include only a d.c. component.
摘要翻译：图像形成装置包括多个显影装置和感光鼓。每个显影装置包括显影剂承载辊。显影装置中的一个移动到与形成有潜像的感光鼓相对的显影位置。第一个发展中的偏见包括直流组件和a.c. 将显影剂承载辊施加到显影剂承载辊上并使显影剂承载辊上的显影剂与感光鼓上的潜像接触，使潜像显影。另一方面，当显影剂承载辊上的显影剂由于显影装置的移动而与感光鼓接触并与感光鼓分离时，第二显影偏压被施加到显影剂承载辊上。与第一显影偏压相比，第二显影偏压产生电场，显影剂承载辊上的显影剂更不愿意向感光鼓移动。第二种发展中的偏见可能只包括直流零件。

5. 发明授权

US5384628A Developing device for image forming equipment 失效
标题翻译：成像设备显影装置
公开(公告)号：US5384628A
公开(公告)日：1995-01-24
申请号：US131967
申请日：1993-10-08
申请人： Nobuo Takami , Kazuyuki Sugihara , Takayuki Maruta , Kazuo Nojima , Noboru Sawayama , Kaoru Yoshimatsu , Katsuji Watabe , Takuji Yoneda
发明人： Nobuo Takami , Kazuyuki Sugihara , Takayuki Maruta , Kazuo Nojima , Noboru Sawayama , Kaoru Yoshimatsu , Katsuji Watabe , Takuji Yoneda
IPC分类号： G03G15/08 , G03G15/06
CPC分类号： G03G15/0822 , G03G15/0896
摘要： A developing device for image forming equipment capable of agitating and mixing a fresh toner and a developer sufficiently is disclosed. The device eliminates a change in image density among individual copies, irregularity in density corresponding to the spiral pitch of, for example, a toner transport screw, and irregularity in density in the front-and-rear direction (axial direction of a developing sleeve) ascribable to defective agitation. To replace or clean a desire part or parts built in a developing device, the device is divided into two such that the desired parts are freely accessible. This facilitates the cleaning and replacement of such parts.
摘要翻译：公开了能够充分搅拌和混合新鲜调色剂和显影剂的成像设备的显影装置。该装置消除了各个副本之间的图像浓度的变化，对应于例如调色剂输送螺杆的螺旋间距的密度的不规则性以及前后方向（显影套筒的轴向）的密度的不规则性，归因于躁动不良。为了更换或清理内置在显影装置中的期望的部件或部件，该装置被分成两个，使得所需的部件可自由地接近。这有助于清洁和更换这些部件。

6. 发明授权

US5270783A Image forming equipment having improved toner sensing 失效
标题翻译：具有改进的调色剂感测的成像设备
公开(公告)号：US5270783A
公开(公告)日：1993-12-14
申请号：US922389
申请日：1992-07-31
申请人： Takashi Bisaiji , Kouji Hayashi , Noboru Sawayama , Takeyoshi Sekine , Takayuki Maruta , Norimitu Kikuchi , Tetsuro Miura , Kazunori Bannai , Kazunari Yamada , Nobuhiro Nakayama , Nobuyuki Koinuma
发明人： Takashi Bisaiji , Kouji Hayashi , Noboru Sawayama , Takeyoshi Sekine , Takayuki Maruta , Norimitu Kikuchi , Tetsuro Miura , Kazunori Bannai , Kazunari Yamada , Nobuhiro Nakayama , Nobuyuki Koinuma
IPC分类号： G03G15/00 , G03G15/01 , G03G15/06 , G03G15/08 , G03G15/09 , G03G21/00 , H04N1/29
CPC分类号： G03G15/0126 , G03G15/0849 , G03G15/0851 , G03G15/0853
摘要： Image forming equipment having an image carrier and a developer carrier located face-to-face and forming an AC-superposed DC electric field between them to develop a latent image electrostatically formed on the image carrier. Sensors responsive to image forming conditions are provided and protected from noise ascribable to an AC component included in the electric field in the event when the sensors operate.
摘要翻译：图像形成设备具有图像载体和显影剂载体，面对面地形成并在它们之间形成AC叠加的DC电场，以形成静电形成在图像载体上的潜像。提供响应图像形成条件的传感器，并且在传感器操作的情况下，防止归因于包括在电场中的AC分量的噪声。

7. 发明授权

US5227842A Electrophotographic image forming apparatus which controls developer bias based on image irregularity 失效
标题翻译：基于图像不规则控制显影剂偏压的电子照相图像形成装置
公开(公告)号：US5227842A
公开(公告)日：1993-07-13
申请号：US855092
申请日：1992-03-20
申请人： Kouji Hayashi , Takashi Bisaiji , Norimitsu Kikuchi , Takeyoshi Sekine , Noboru Sawayama , Takayuki Maruta , Tetsuro Miura , Kazunori Bannai , Kazunari Yamada , Nobuhiro Nakayama
发明人： Kouji Hayashi , Takashi Bisaiji , Norimitsu Kikuchi , Takeyoshi Sekine , Noboru Sawayama , Takayuki Maruta , Tetsuro Miura , Kazunori Bannai , Kazunari Yamada , Nobuhiro Nakayama
IPC分类号： G01N21/47 , G03G15/00 , G03G15/01 , G03G15/06 , G03G15/08
CPC分类号： G03G15/065 , G03G15/0848 , G03G15/5041 , G03G2215/00042
摘要： An image forming apparatus having a developing device of the type using a two-component type developer and developing an electrostatic latent image by a bias electric field having an alternating electric field. A predetermined reference latent image is electrostatically formed on an image carrier by a reference latent image forming device and then developed by the developing device to become a reference toner image. An irregularity detecting circuit determines the degree of difference between the density of the edge and the density of the central portion of the reference toner image. A bias electric field control circuit controls the bias electric field in matching relation to the output of the irregularity detecting circuit, thereby preventing the image quality from being degraded by a change in the resistance of the carrier.
摘要翻译：一种图像形成装置，其具有使用双组分型显影剂的类型的显影装置，并且通过具有交变电场的偏置电场显影静电潜像。通过参考潜像形成装置在图像载体上静电地形成预定的参考潜像，然后由显影装置显影，成为基准调色剂图像。不规则检测电路确定边缘的密度与基准调色剂图像的中心部分的密度之间的差异程度。偏置电场控制电路控制与不规则检测电路的输出匹配关系的偏置电场，从而防止图像质量由于载波电阻的变化而劣化。

8. 发明授权

US07161712B2 Apparatus for forming images with proper gamma correction 有权
标题翻译：用于通过适当伽马校正形成图像的装置
公开(公告)号：US07161712B2
公开(公告)日：2007-01-09
申请号：US10114265
申请日：2002-04-03
申请人： Takayuki Maruta , Minori Uchida
发明人： Takayuki Maruta , Minori Uchida
IPC分类号： G06F15/00
CPC分类号： H04N1/4015
摘要： An apparatus for forming an image includes a photosensitive body, an optical write unit which scans a light beam along a main scan path on a photosensitive body to create a latent image thereon, the light beam having power levels corresponding to multi-level image data, and a shading correction unit which corrects shading along the main scan path by making adjustment to the multi-level image data along the main scan path, and changes the adjustment on a condition-specific basis.
摘要翻译：用于形成图像的装置包括感光体，光学写入单元，其沿着感光体上的主扫描路径扫描光束以在其上产生潜像，所述光束具有对应于多级图像数据的功率电平，以及阴影校正单元，其通过对沿着主扫描路径的多级图像数据进行调整来校正沿着主扫描路径的阴影，并且在条件特定的基础上改变调整。

9. 发明申请

US20050281593A1 Magnetic carrier, two-component developer, development method, development device and image forming apparatus of electrophotography 有权
标题翻译：磁性载体，双组分显影剂，显影方法，显影装置和电子照相成像装置
公开(公告)号：US20050281593A1
公开(公告)日：2005-12-22
申请号：US11209770
申请日：2005-08-24
申请人： Takamasa Ozeki , Takayuki Maruta , Takuji Yoneda
发明人： Takamasa Ozeki , Takayuki Maruta , Takuji Yoneda
IPC分类号： G03G9/10 , G03G9/107 , G03G15/09
CPC分类号： G03G9/107 , G03G9/10 , G03G15/09
摘要： A two-component developer including toner and magnetic carriers is provided. The two-component developer is characterized in that when a development device including a developer bearing member bearing the two-component developer is operated under a development condition of an image forming apparatus using a quasi-photoconductor in which a 10 μm thick layer of tetrafluoroethylene resin is provided to a conductive material, the number of times of light emission occurring in a magnetic brush formed on the developer bearing member due to partial conduction in the magnetic brush is 10 times or less per second at an observation cross section that is perpendicular relative to a rotation axis of the developer bearing member.
摘要翻译：提供了包括调色剂和磁性载体的双组分显影剂。双组分显影剂的特征在于，当包含带有双组分显影剂的显影剂承载构件的显影装置在使用准光电导体的图像形成装置的显影条件下操作时，其中将10μm厚的四氟乙烯树脂层被提供给导电材料时，由于在磁刷中的部分导电而在形成于显影剂承载部件上的磁刷中发生的发光次数在相对于显影剂承载部件的旋转轴线。

10. 发明授权

US07174124B2 Tandem color image forming apparatus with an image transfer belt and backup roller 失效
标题翻译：具有图像转印带和支撑辊的串联彩色图像形成装置
公开(公告)号：US07174124B2
公开(公告)日：2007-02-06
申请号：US10660699
申请日：2003-09-12
申请人： Hitoshi Ishibashi , Takayuki Maruta , Yuuji Sawai , Takahiro Yoshikawa , Atsushi Takehara
发明人： Hitoshi Ishibashi , Takayuki Maruta , Yuuji Sawai , Takahiro Yoshikawa , Atsushi Takehara
IPC分类号： G03G15/01
CPC分类号： G03G15/1675 , G03G15/0131
摘要： An image forming apparatus of the present invention disclosed is of the type sequentially transferring toner images from a plurality of photoconductive drums to a sheet being conveyed by an image transfer belt or an intermediate image transfer belt one above the other with bias applying members to thereby form a composite color image. Backup rollers, contacting the inside surface of the belt, each have volumetric resistivity of 109 Ω·cm or above and ten-point mean surface roughness Rz of 6 μm or above.
摘要翻译：公开的本发明的图像形成装置是将调色剂图像从多个感光鼓顺序地转印到由图像转印带或中间图像转印带一起在另一个之上传送的纸张的类型，其中偏压施加部件形成复合彩色图像。与带内表面接触的支承辊各自的体积电阻率为10Ω·cm以上，10点平均表面粗糙度Rz为6μm以上。

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