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1. 发明专利

JP2008310082A Developing device and image forming apparatus 审中-公开
标题翻译：开发设备和图像形成装置
公开(公告)号：JP2008310082A
公开(公告)日：2008-12-25
申请号：JP2007158297
申请日：2007-06-15
申请人： Ricoh Printing Systems Ltd , リコープリンティングシステムズ株式会社
发明人： TSUJITA AKIO , MABUCHI HIROYUKI , KATAOKA KAORU , SUZUKI KATSUHIKO
IPC分类号： G03G15/08
摘要： PROBLEM TO BE SOLVED: To attain uniform development required for high image quality printing, while securing developability at high-speed process, by using a fountain type developing machine which excels in durability and stability and developer having comparatively large particle size. SOLUTION: In the fountain-type developing device where at least a pair of developing rolls out of a plurality of developing rolls has developing rolls rotating in the reverse direction and in the direction same as the rotating direction of an image carrier, a developer filling rate between the developing roll, located on the most downstream side and a latent image carrier is set to 18-33%, and AC bias applied to the developing roll is of frequency 4-7 kHz, and alternating voltage of Vpp is 400-700 V, and also a developer filling rate between the developing roll other than these, and the latent image carrier is set to 30-40%, and AC bias applied to the developing roll is set to frequency 7-12 kHz and alternating voltage Vpp is set to be within 300-500V. COPYRIGHT: (C)2009,JPO&INPIT
摘要翻译：要解决的问题：为了获得高图像质量打印所需的均匀发展，通过使用耐久性和稳定性优异的喷泉式显影机和具有较大粒度的显影剂，同时确保高速加工时的显影性。解决方案：在喷墨型显影装置中，多个显影辊中至少有一对显影辊具有沿图像载体的相反方向和与图像载体的旋转方向相同的方向旋转的显影辊，位于最下游侧的显影辊和潜像载体之间的显影剂填充率设定为18-33％，施加到显影辊的AC偏压为4-7kHz，Vpp的交流电压为400 -700V，并且除了这些之外的显影辊和潜像载体之间的显影剂填充率也设定为30-40％，施加到显影辊的AC偏压设定为7-12kHz的频率，交流电压 Vpp设置在300-500V以内。版权所有（C）2009，JPO＆INPIT

2. 发明专利

JP2007212827A Image forming apparatus and image forming system 有权
标题翻译：图像形成装置和图像形成系统
公开(公告)号：JP2007212827A
公开(公告)日：2007-08-23
申请号：JP2006033454
申请日：2006-02-10
申请人： Ricoh Printing Systems Ltd , リコープリンティングシステムズ株式会社
发明人： UMEDA TAKAO , TSUJITA AKIO , TAKAYAMA AKITA
IPC分类号： G03G15/16 , G03G21/10
摘要： PROBLEM TO BE SOLVED: To provide an image forming apparatus responding to continuous paper where, in transferring to rough-surfaced paper whose surface has great ruggedness and transferring on the second face in paper in which wrinkles are generated by heat upon toner image fixing to the first face, the satisfactory transferring free from image defects is made possible.
SOLUTION: The inside of a transfer unit housing 6 is stored with: a transferring assist roller 5; a corona transfer unit 3; and an AC discharger 4, and the transferring assist roller 5 is arranged at the upstream side of the corona transfer unit 3. The transferring assist roller 5 is obtained by covering a metal roll with an electrically conductive and thermally shrinkable tube and performing heating treatment. For preventing the electrostatic sticking of a bipolar toner to the transferring assist roller, an A.C. electric field is applied to the space between the transferring assist roller and a photosensitive drum face. Concretely, pulse voltage is applied to a core bar in the transferring assist roller. Upon printing, the transferring assist roller 5 presses a recording medium 7 against the photoconductor face 2 of the photosensitive drum 1. The transferring assist roller 5 rotates in accordance with the carriage of the recording medium 7, and also, secures the adhesion between the recording medium 7 and the photoconductor face 2.
COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：要解决的问题：提供一种响应于连续纸张的图像形成装置，其中转印到表面具有很大凹凸的粗糙表面的纸张上，并且在色粉图像上通过热产生皱纹的纸中的第二面上转印固定在第一面上，可以实现令人满意的无图像缺陷的转印。
解决方案：转印单元壳体6的内部存储有：转印辅助辊5; 电晕转印单元3; 和AC放电器4，并且转印辅助辊5布置在电晕转印单元3的上游侧。转印辅助辊5通过用导电和热收缩管覆盖金属辊并进行加热处理而获得。为了防止双极调色剂对转印辅助辊的静电粘附，将交流电场施加到转印辅助辊和感光鼓表面之间的空间。具体地说，将脉冲电压施加到转印辅助辊中的芯棒上。在打印时，转印辅助辊5将记录介质7压靠在感光鼓1的感光体面2上。转印辅助辊5根据记录介质7的滑架旋转，并且还确保记录介质7和感光体面2.版权所有（C）2007，JPO＆INPIT

3. 发明专利

JP2007156314A Electrostatic printer 审中-公开
标题翻译：静电打印机
公开(公告)号：JP2007156314A
公开(公告)日：2007-06-21
申请号：JP2005354801
申请日：2005-12-08
申请人： Ricoh Printing Systems Ltd , リコープリンティングシステムズ株式会社
发明人： TSUJITA AKIO
IPC分类号： G03G21/06 , G03G15/02 , G03G21/00
摘要： PROBLEM TO BE SOLVED: To provide an electrostatic recorder which is high in printing quality without causing any memory phenomenon. SOLUTION: The electrostatic printer uses a photoreceptor (may be a photoreceptor belt) comprising an organic photoconductor as a base material and having a single layer structure and electrifies the photoreceptor, to form an electrostatic latent image based on image information and develop the latent image into a toner image. In the electrostatic printer, printing speed is 300mm/sec or more. A primary static eliminating light source is provided on the upstream side of a transfer mechanism, an AC static eliminator and a cleaning mechanism are arranged on the upstream side of a transfer unit and a reelectrifier and a second static eliminating light source are provided on the downstream side of the AC static eliminator and the cleaning mechanism. Alternatively, the primary static eliminating light source is provided on the upstream side of the transfer mechanism, an AC static eliminator to which a DC bias having the same polarity as the main charge polarity is applied is arranged on the downstream side of the transfer unit, and the secondary static eliminating light source is provided on the downstream side of the cleaning mechanism. COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：要解决的问题：提供一种打印质量高而不引起任何记忆现象的静电记录器。解决方案：静电打印机使用包含有机感光体作为基材并具有单层结构并使感光体带电的感光体（可以是感光带），基于图像信息形成静电潜像，并开发将潜像变成调色剂图像。在静电打印机中，打印速度为300mm / sec以上。在传送机构的上游侧设置有主要的静电消除光源，在传送单元的上游侧布置有AC静电消除器和清洁机构，并且在下游侧设置有再电旁路和第二静电消除光源交流静电消除器和清洁机构的一侧。或者，主传递机构的上游侧设置有主静电消除光源，在转印单元的下游侧配置有施加了与主电荷极性相同极性的直流偏压的交流静电消除器，并且在清洁机构的下游侧设置有二次除电光源。版权所有（C）2007，JPO＆INPIT

4. 发明专利

JP2006023381A Corona discharge device and image forming apparatus provided with the same 有权
标题翻译： CORONA放电装置和图像形成装置
公开(公告)号：JP2006023381A
公开(公告)日：2006-01-26
申请号：JP2004199483
申请日：2004-07-06
申请人： Ricoh Printing Systems Ltd , リコープリンティングシステムズ株式会社
发明人： KUBO TATSUYA , OTOME YUKIO , TSUJITA AKIO
IPC分类号： G03G15/02 , G03G15/16 , G03G21/06 , H01T19/04 , H05F3/04
摘要： PROBLEM TO BE SOLVED: To provide a corona discharge device, from which foreign substances sticking to a sawtooth electrode can be removed using a simple cleaning mechanism and with which proper images are obtained. SOLUTION: In the corona discharge device with the sawtooth electrode 11, having a large number of sawtooth parts 111, the cleaning mechanism 9 provided with an elastic cleaning member 91; a holding member 92 which holds the cleaning member 91, in such a way that a top of the cleaning member 91 protrudes; and a moving means 93 to move the holding member 92 along a longitudinal direction of the sawtooth electrode 11 is disposed near the sawtooth electrode 11, in such a way that the tip of the cleaning member 91 is inserted between the sawtooth parts 111 and 111, and the holding member 92 is moved by the moving means 93 along the longitudinal direction of the sawtooth electrode 11. COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：提供一种电晕放电装置，可以使用简单的清洁机构从而从其中去除粘附到锯齿电极的异物并获得适当的图像。解决方案：在具有锯齿电极11的电晕放电装置中，具有大量锯齿部件111，清洁机构9设置有弹性清洁部件91; 保持构件92，其保持清洁构件91，使得清洁构件91的顶部突出; 并且沿着锯齿电极11的长度方向移动保持构件92的移动装置93设置在锯齿电极11附近，使得清洁构件91的末端插入在锯齿部111和111之间，并且保持构件92沿着锯齿电极11的长度方向被移动装置93移动。版权所有（C）2006，JPO＆NCIPI

5. 发明专利

JP2005227592A Belt photoreceptor driving mechanism and printer 审中-公开
标题翻译：皮带驱动机构和打印机
公开(公告)号：JP2005227592A
公开(公告)日：2005-08-25
申请号：JP2004037008
申请日：2004-02-13
申请人： Ricoh Printing Systems Ltd , リコープリンティングシステムズ株式会社
发明人： TSUJITA AKIO , YAMAZAKI AKIHIKO , KUBO TATSUYA
IPC分类号： G03G21/00 , F16C13/00 , G03G15/00
摘要： PROBLEM TO BE SOLVED: To prevent occurrence of image defects due to faulty transfer even when foreign substances such as toner, paper dust and carrier enter the gap between a belt photoreceptor and a roller which drives or supports the belt photoreceptor. SOLUTION: In a belt photoreceptor driving mechanism comprising a driving roller disposed on the inner side of a belt photoreceptor to circularly drive the belt photoreceptor; a driven roller which rotates with circular movement of the belt photoreceptor in a following manner; and a tension roller which applies tension to the belt photoreceptor and rotates with circular movement of the belt photoreceptor in a following manner, a surface roughness Rmax of the driving or driven roller located in a transfer position is set to 50S-200S. COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：要解决的问题：即使当诸如调色剂，纸粉和载体的异物进入带式感光体和驱动或支撑带感光体的辊之间的间隙时，为了防止由于错误转印而导致的图像缺陷的发生。解决方案：在带式感光体驱动机构中，包括设置在带感光体的内侧的驱动辊，以循环驱动带感光体; 以下述方式以带状感光体的圆周运动旋转的从动辊; 以及张紧辊，其对带感光体施加张力，并且以带状感光体的圆周运动旋转，位于转印位置的驱动辊或从动辊的表面粗糙度Rmax被设定为50S-200S。版权所有（C）2005，JPO＆NCIPI

6. 发明专利

JP2008286836A Image forming apparatus 审中-公开
标题翻译：图像形成装置
公开(公告)号：JP2008286836A
公开(公告)日：2008-11-27
申请号：JP2007129069
申请日：2007-05-15
申请人： Ricoh Printing Systems Ltd , リコープリンティングシステムズ株式会社
发明人： KATAOKA KAORU , TSUJITA AKIO , SUZUKI KATSUHIKO
IPC分类号： G03G15/08 , G03G15/09 , G03G21/10
摘要： PROBLEM TO BE SOLVED: To reduce image deterioration resulting from scraping by a brush in contact development with a two-component magnetic brush composed of toner and carrier. SOLUTION: The image forming apparatus includes a two-component developing roll 3 using two-component developer composed of toner and carrier and a one-component developing roll 4 using one-component developer composed only of toner, and a photo-semiconductor 1 that is an image carrier in the same developing device. The two-component developing roll 3 forms the brush by a magnet and is installed in contact with the photo-semiconductor, and the one-component developing roll 4 is installed in contact with or in non-contact with the photo-semiconductor. COPYRIGHT: (C)2009,JPO&INPIT
摘要翻译：要解决的问题：为了减少由与由调色剂和载体组成的双组分磁刷接触显影的刷子刮擦导致的图像劣化。解决方案：图像形成装置包括使用由调色剂和载体构成的双组分显影剂的双组分显影辊3和使用仅由调色剂构成的单组分显影剂的单组分显影辊4和光半导体 1是同一显影装置中的图像载体。双组分显影辊3通过磁体形成刷子并与光半导体接触地安装，单组分显影辊4安装成与光半导体接触或非接触。版权所有（C）2009，JPO＆INPIT

7. 发明专利

JP2007233327A Image forming apparatus 审中-公开
标题翻译：图像形成装置
公开(公告)号：JP2007233327A
公开(公告)日：2007-09-13
申请号：JP2006201389
申请日：2006-07-25
申请人： Ricoh Printing Systems Ltd , リコープリンティングシステムズ株式会社
发明人： TAMAHASHI KUNIHIRO , KAWANISHI TSUNEAKI , TSUJITA AKIO
IPC分类号： G03G21/20
摘要： PROBLEM TO BE SOLVED: To provide an image forming apparatus capable of preventing quality of a printed image from deteriorating by preventing the surface temperature of a photoreceptor from rising. SOLUTION: A compressor 1-2 generates and blows a cold blast to the surface of the photoreceptor 4 through a vortex tube 1-1 or to the case of a developing unit 9, a contact member 1-5 for a form 11, a contact member 1-4 for the photoreceptor 4, etc., for cooling. COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：要解决的问题：提供一种能够通过防止感光体的表面温度升高来防止打印图像质量下降的图像形成装置。解决方案：压缩机1-2通过涡流管1-1产生并吹送到感光体4的表面，或者吹塑到显影单元9的外壳上，用于形式11的接触构件1-5 ，用于感光体4的接触构件1-4等用于冷却。版权所有（C）2007，JPO＆INPIT

8. 发明专利

JP2007218949A Contact type transfer means and continuous feed electrostatic printer using the same 有权
标题翻译：接触式传送装置和连续进料静电打印机
公开(公告)号：JP2007218949A
公开(公告)日：2007-08-30
申请号：JP2006036147
申请日：2006-02-14
申请人： Ricoh Printing Systems Ltd , リコープリンティングシステムズ株式会社
发明人： UMEDA TAKAO , MABUCHI HIROYUKI , TSUJITA AKIO
IPC分类号： G03G15/16
摘要： PROBLEM TO BE SOLVED: To provide a continuous feed electrostatic printer in which a transfer roller as a contact type transfer member is extended in life and high in durability and which prevents a transfer defect due to vibrations caused by repulsive force that the transfer roller rotating in press contact with a paper receives from a paper tensed and conveyed at a high speed.
SOLUTION: The contact type transfer member comprises a driving roller which drives a conductive belt, and a conductive rubber roller and a tension roller which are driven by the conductive belt to rotate, and the continuous paper is pressed against a toner image carrier across the conductive belt rotating the conductive rubber roller. A power source applies a voltage having the polarity opposite to that of toner to a core bar of the conductive rubber roller. Further, the constitution (thickness, rubber hardness, etc.) of the conductive rubber roller and conductive belt and press-contact force of the conductive roller to the paper and toner image carrier are optimized so that the width of a contact nip area between the conductive belt and continuous paper at a transfer section may be narrower than the width of a contact nip area between the paper and toner image carrier.
COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：要解决的问题：提供一种连续进给静电打印机，其中作为接触型转印部件的转印辊寿命延长并且耐久性高，并且防止由于排斥力引起的振动导致的转印缺陷转印与纸张接触的辊旋转从纸张收到并张紧并以高速传送。解决方案：接触型转印构件包括驱动导电带的驱动辊和由导电带驱动旋转的导电橡胶辊和张力辊，并且连续的纸被压靠在调色剂图像载体上穿过导电带旋转导电胶辊。电源将具有与调色剂极性相反的极性的电压施加到导电橡胶辊的芯棒。此外，导电橡胶辊和导电带的结构（厚度，橡胶硬度等）和导电辊与纸和调色剂图像载体的压力接触力被优化，使得接触夹持区域的宽度导电带和连续纸在转印部分可以比纸和调色剂图像载体之间的接触夹持区域的宽度窄。版权所有（C）2007，JPO＆INPIT

9. 发明专利

JP2007187888A Method and apparatus for manufacturing electrophotographic selenium photoreceptor 审中-公开
标题翻译：制造电子照相硒光子的方法和装置
公开(公告)号：JP2007187888A
公开(公告)日：2007-07-26
申请号：JP2006006021
申请日：2006-01-13
申请人： Ricoh Printing Systems Ltd , リコープリンティングシステムズ株式会社
发明人： KAWANISHI TSUNEAKI , TAMAHASHI KUNIHIRO , TSUJITA AKIO
IPC分类号： G03G5/08
摘要： PROBLEM TO BE SOLVED: To prevent image defects such as a void and a black spot and to use a photoreceptor for a long period of time without being replaced by studying conditions for preventing production of toner aggregates on the surface of a selenium photoreceptor.
SOLUTION: After a photosensitive layer comprising selenium or a selenium alloy is formed on the surface of a conductive substrate by vacuum vapor deposition, the photosensitive layer surface is exposed to a supercritical fluid having a critical temperature of 0°C to 90°C at a temperature higher than the glass transition temperature and lower than the crystallization temperature of the photosensitive layer.
COPYRIGHT: (C)2007,JPO&INPIT

10. 发明专利

JP2008033020A Developing device and image forming apparatus 审中-公开
标题翻译：开发设备和图像形成装置
公开(公告)号：JP2008033020A
公开(公告)日：2008-02-14
申请号：JP2006206529
申请日：2006-07-28
申请人： Ricoh Printing Systems Ltd , リコープリンティングシステムズ株式会社
发明人： TSUJITA AKIO , KATAOKA KAORU , SUZUKI KATSUHIKO
IPC分类号： G03G15/08 , G03G15/09
摘要： PROBLEM TO BE SOLVED: To provide a developing device which can stably provide a high-quality image over a long term, and an image forming apparatus equipped with the developing device. SOLUTION: A reverse rotation developing roll 1 and a forward rotation developing roll 2 are arranged near an image carrier 101, and the first edge part 3b of a regulating member 3 is opposed to the magnetic pole part N2 of the reverse rotation developing roll 1, and the second edge part 3c of the regulating member 3 is opposed to the magnetic pole part N2' of the forward rotation developing roll 2. The magnetic pole parts N2 and N2' are magnetic pole parts having two peaks in flux density distribution, and a part corresponding to a valley between the two peaks is opposed to the edge parts 3b and 3c. COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：提供一种能够长期稳定地提供高质量图像的显影装置，以及配备有显影装置的图像形成装置。解决方案：反转显影辊1和正转显影辊2设置在图像载体101附近，调节构件3的第一边缘部分3b与反转显影剂的磁极部分N2相对辊1，调节件3的第二边缘部分3c与正转显影辊2的磁极部分N2'相对。磁极部分N2和N2'是具有两个磁通密度分布峰值的磁极部件并且对应于两个峰之间的谷部的部分与边缘部分3b和3c相对。版权所有（C）2008，JPO＆INPIT

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