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1. 发明专利

JP2010054848A Transfer electric field forming member, transfer device and image forming apparatus 审中-公开
标题翻译：传输电场成形件，传送装置和图像形成装置
公开(公告)号：JP2010054848A
公开(公告)日：2010-03-11
申请号：JP2008220282
申请日：2008-08-28
申请人： Ricoh Co Ltd , 株式会社リコー
发明人： KOYAMA HAJIME , ECHIGO KATSUHIRO , TAMIYA TAKAHIRO
IPC分类号： G03G15/16 , F16C13/00
摘要： PROBLEM TO BE SOLVED: To prevent or suppress a solid image from getting rough on non-smooth paper by a transfer electric field forming member which is included in an image forming apparatus such as a copying machine, a facsimile device and a printer including an endless belt type rotating member such as an intermediate transfer belt and a photoreceptor belt configured to carry a toner image, and forms transfer electric field for transferring the toner image on the rotating member to a recording medium. SOLUTION: The transfer electric field forming member 72 has an elastic layer 72a abutting on a back surface of the endless belt type rotating member 11, and forms the transfer electric field for transferring the toner image to the recording medium S between a counter member 5 on a front surface side of the rotating member 11 and the transfer electric field forming member 72. The elastic layer 72a is smaller in thickness than the rotating member 11 and contains particulates 72c having larger volume average particle size than that of toner constituting the toner image carried on the rotating member 11. The transfer device 19 is provided with the transfer electric field forming member 72. The image forming apparatusis provided with them. COPYRIGHT: (C)2010,JPO&INPIT
摘要翻译：要解决的问题：为了防止或抑制通过包括在诸如复印机，传真装置和打印机的图像形成装置中的转印电场形成构件来防止或抑制固体图像在非光滑纸上变粗糙包括环形带式旋转构件，例如中间转印带和被配置为承载调色剂图像的感光带，并且形成用于将旋转构件上的调色剂图像转印到记录介质的转印电场。
解决方案：转印电场形成元件72具有与环形带式旋转元件11的背面邻接的弹性层72a，并形成用于将调色剂图像转印到记录介质S之间的转印电场构件5在旋转构件11的前表面侧和转印电场形成构件72上。弹性层72a的厚度小于旋转构件11，并且包含比构成该构件的调色剂的体积平均粒径更大的颗粒72c 调色剂图像承载在旋转构件11上。转印装置19设置有转印电场形成构件72.图像形成装置具有它们。版权所有（C）2010，JPO＆INPIT

2. 发明专利

JP2010044331A Electrophotographic type image forming apparatus 审中-公开
标题翻译：电子印刷图像形成装置
公开(公告)号：JP2010044331A
公开(公告)日：2010-02-25
申请号：JP2008209962
申请日：2008-08-18
申请人： Ricoh Co Ltd , 株式会社リコー
发明人： TAMIYA TAKAHIRO , KOYAMA HAJIME , ECHIGO KATSUHIRO
IPC分类号： G03G15/16 , G03G21/14
摘要： PROBLEM TO BE SOLVED: To provide an image forming apparatus which simultaneously eliminates a moth-eaten image, image irregularities and transfer dust, by applying an adhesion force by pressure in a secondary transfer nip and reducing the adhesion force through vibration, in a part of the secondary transfer nip or, preferably, at the center thereof. SOLUTION: The electrophotographic type image forming apparatus includes: an endless belt-like image carrier 31, on which toner images of a plurality of colors are placed and which is turned; a turnable secondary transfer roller 36, which brings a body to be transferred P into close contact with the image carrier 31; and a turning opposing roller 32, which is arranged in the inner peripheral surface of the image carrier 31 and faces the second transfer roller 36. The electrophotographic image forming apparatus further includes: a plurality of high-frequency oscillating members 210 and 211, which are arranged in such a manner that the circle of the opposing roller 32 is divided; and a drive bias circuit 310, which is engaged with only a certain part of the high-frequency oscillation members 210 and 211, from the end of the opposing roller 32 and drives only a part of the high-frequency oscillating members 210 and 211, which are engaged with the inside of a nip area, formed by the image carrier 31 and the secondary transfer roller 36. COPYRIGHT: (C)2010,JPO&INPIT
摘要翻译：要解决的问题：提供一种图像形成装置，其通过在二次转印辊隙中施加压力的粘附力并通过振动减小粘附力同时消除蛾咬图像，图像不规则和转印灰尘，在二次转印辊隙的一部分，或优选在其中心。解决方案：电子照相式图像形成装置包括：环形带状图像载体31，其上放置多种颜色的调色剂图像并转动; 可转动的二次转印辊36，其使被转印体P与图像载体31紧密接触; 以及设置在图像载体31的内周面并与第二转印辊36相对的转动对置辊32.电子照相图像形成装置还包括：多个高频振荡部件210,211，以相对辊32的圆分割的方式布置; 以及与相对辊32的端部仅与高频振荡部件210,211的一部分配合的驱动偏置电路310，仅驱动一部分高频摆动部件210,211，它们与由图像载体31和二次转印辊36形成的辊隙区域的内部接合。版权所有（C）2010，JPO＆INPIT

3. 发明专利

JP2009251184A Image forming apparatus 审中-公开
标题翻译：图像形成装置
公开(公告)号：JP2009251184A
公开(公告)日：2009-10-29
申请号：JP2008097424
申请日：2008-04-03
申请人： Ricoh Co Ltd , 株式会社リコー
发明人： KOYAMA HAJIME , ECHIGO KATSUHIRO , TAMIYA TAKAHIRO
IPC分类号： G03G15/16
摘要： PROBLEM TO BE SOLVED: To provide an image forming apparatus capable of obtaining a fine and high-picture-quality image by suppressing generation of transfer dust.
SOLUTION: A direction reverse to a traveling direction of a belt member 9 is called as an upstream side. A conductive electrode member 24 is arranged on a position that is the upstream side from a position Q where a transfer member 14 is brought into contact with an inner peripheral surface 9b of the belt member 9 and that is close to the belt member 9. When a predetermined voltage is applied to the electrode member 24, an electric field in a direction for moving toner on an image carrier 2 to the belt member 9 side is suppressed on the upstream side of a transfer nip N1.
COPYRIGHT: (C)2010,JPO&INPIT
摘要翻译：要解决的问题：提供一种能够通过抑制转印灰尘的产生而获得精细和高质量图像的图像形成装置。解决方案：将带构件9的行进方向相反的方向称为上游侧。导电电极部件24配置在从传送部件14与带部件9的内周面9b接触并且靠近带部件9的位置Q的上游侧的位置。当向电极部件24施加规定的电压，在转印压区N1的上游侧抑制了将图像载体2上的调色剂向带部件9侧移动的方向上的电场。版权所有（C）2010，JPO＆INPIT

4. 发明专利

JP2009036927A Image forming device 审中-公开
标题翻译：图像形成装置
公开(公告)号：JP2009036927A
公开(公告)日：2009-02-19
申请号：JP2007200014
申请日：2007-07-31
申请人： Ricoh Co Ltd , 株式会社リコー
发明人： KOYAMA HAJIME , ECHIGO KATSUHIRO , TAMIYA TAKAHIRO
IPC分类号： G03G15/16 , G03G15/01
摘要： PROBLEM TO BE SOLVED: To provide an image forming device capable of surely preventing the occurrence of transfer dust without impairing transfer image quality, when removing charges from an intermediate transfer body, while preventing wearing and adherence of foreign substances, and capable of preventing the occurrence of uneven density due to charge removal.
SOLUTION: With respect to the composition of a surface layer member abutting against a transfer body 2 in a charge removing member 4 is composed of a material having a higher volume resistance (ρ) of the surface layer member than any of the volume resistance of the transfer body 2 and the volume resistance of an image carrier 1, wherein the electrostatic capacity (C) per unit area is 1/5 or larger than that of the image carrier 1, and thereby the occurrence of the uneven density due to the shortage of charging, when preventing dust phenomenon by charge removal, can be prevented.
COPYRIGHT: (C)2009,JPO&INPIT
摘要翻译：解决问题：为了提供能够确保防止转印粉尘的产生而不损害转印图像质量的图像形成装置，当从中间转印体去除电荷时，同时防止异物的磨损和粘附，并且能够防止由于电荷去除引起的不均匀密度的发生。解决方案：关于在电荷去除部件4中与转印体2邻接的表面层构件的组成由表面层构件的体积电阻（ρ）高于任何体积的材料构成转印体2的电阻和图像载体1的体积电阻，其中每单位面积的静电电容（C）为图像载体1的1/5或更大，从而由于可以防止充电时的不足，防止通过电荷除去的粉尘现象。版权所有（C）2009，JPO＆INPIT

5. 发明专利

JP2008299076A Image forming apparatus 审中-公开
标题翻译：图像形成装置
公开(公告)号：JP2008299076A
公开(公告)日：2008-12-11
申请号：JP2007145025
申请日：2007-05-31
申请人： Ricoh Co Ltd , 株式会社リコー
发明人： ECHIGO KATSUHIRO , TAMIYA TAKAHIRO , KOYAMA HAJIME
IPC分类号： G03G15/16
摘要： PROBLEM TO BE SOLVED: To provide an image forming apparatus suppressing discharge that may be caused in a gap between an image carrier and a belt member, and reducing deterioration of, for example, the back of the belt member. SOLUTION: When it is not necessary to apply a bias to an area of the back of the intermediate transfer belt 110, the area which is behind a transfer nip, the apparatus can separate at least one of a transfer bias roller 62 for the reverse polarity to toner or an exit bias blade 71 for the same polarity as the toner from the back of the intermediate transfer belt. This reduces wear in, for example, the back of the intermediate transfer belt, compared to the case where the transfer bias roller 62 and the exit bias blade 71 are kept in contact with the intermediate transfer belt 110. Discharge that may be caused in a gap between the photoreceptor 1 and the intermediate transfer belt 110 is thereby suppressed and deterioration of, for example, the back of the intermediate transfer belt is reduced. COPYRIGHT: (C)2009,JPO&INPIT
摘要翻译：要解决的问题：提供一种抑制可能在图像载体和带部件之间的间隙中引起的放电的图像形成装置，并且减少例如带部件的背面的劣化。解决方案：当不需要向中间转印带110的背面的区域施加偏压时，转印辊隙后面的区域，该装置可以分离至少一个转印偏压辊62，用于与调色剂相反极性，或与中间转印带背面的调色剂极性相同的出口偏压片71。与转印偏压辊62和出口偏压刮刀71保持与中间转印带110接触的情况相比，这减少了例如中间转印带的背面的磨损。可能在从而可以抑制感光体1与中间转印带110之间的间隙，例如中间转印带的背面的劣化。版权所有（C）2009，JPO＆INPIT

6. 发明专利

JP2008015021A Image forming apparatus 有权
标题翻译：图像形成装置
公开(公告)号：JP2008015021A
公开(公告)日：2008-01-24
申请号：JP2006183363
申请日：2006-07-03
申请人： Ricoh Co Ltd , 株式会社リコー
发明人： TAMIYA TAKAHIRO , ECHIGO KATSUHIRO , KIKUCHI HISASHI , KOYAMA HAJIME
IPC分类号： G03G15/16 , G03G21/00
摘要： PROBLEM TO BE SOLVED: To solve such a problem that an SEF transfer device requires a plurality of power sources outputting voltages of different polarities, and is expensive and disadvantageous as a result. SOLUTION: The image forming apparatus includes: the transfer device that has a plurality of electrode members 102 and 103 disposed in contact with the internal circumference of an intermediate transfer body 10, on the inside of a primary transfer part and on the exit side of the nip between the intermediate transfer body 10 and an image carrier 40K opposite the primary transfer part; and a bias generating device 200 that generates a bias with a polarity same as the electrification polarity of toner used in processes other than a transfer process performed by the transfer device. The bias generating device 200 is also used for applying a bias to the electrode member 103 which is one of the electrode members 102 and 103. COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：解决的问题为了解决SEF传送装置需要输出不同极性的电压的多个电源的问题，结果是昂贵的和不利的。解决方案：图像形成装置包括：转印装置，其具有多个电极构件102和103，该多个电极构件102和103设置成与中间转印体10的内圆周接触，在一次转印部分的内侧和出口在中间转印体10与与一次转印部分相对的图像载体40K之间的辊隙侧; 以及偏置产生装置200，其生成与转印装置执行的转印处理以外的处理中使用的调色剂的带电极性相同的偏置。偏置产生装置200还用于向作为电极构件102和103之一的电极构件103施加偏压。（C）2008，JPO和INPIT

7. 发明专利

JP2007316353A Discharging device and image forming apparatus 审中-公开
标题翻译：放电装置和图像形成装置
公开(公告)号：JP2007316353A
公开(公告)日：2007-12-06
申请号：JP2006146118
申请日：2006-05-26
申请人： Ricoh Co Ltd , 株式会社リコー
发明人： TAMIYA TAKAHIRO , ECHIGO KATSUHIRO , KOYAMA HAJIME
IPC分类号： G03G15/16
摘要： PROBLEM TO BE SOLVED: To provide a discharging device that is inexpensive and designed to reduce wear of a discharging electrode and to prevent a bias application failure caused by a contact failure, and also to provide an image forming apparatus having the discharging device. SOLUTION: The discharging device is disposed next to a device used to transfer a toner image from an image carrier 3 to a belt-like image carrier 4. The discharging device has a web-like discharging electrode 139 which is disposed in contact with the internal face of the belt-like image carrier 4, and is movable, slidable and conductive. The web-like discharging electrode 139 is displaced within the flat face of the belt-like image carrier 4. The image forming apparatus 200 has this discharging device. COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：提供一种便宜且设计成减少放电电极的磨损并防止由接触不良引起的偏压施加故障的放电装置，并且还提供一种具有放电装置的图像形成装置。解决方案：排放装置设置在用于将调色剂图像从图像载体3转印到带状图像载体4的装置旁边。排出装置具有布置成接触的网状放电电极139 带状图像载体4的内表面，并且是可移动的，可滑动的和导电的。网状放电电极139在带状图像载体4的平坦面内移位。图像形成装置200具有该放电装置。版权所有（C）2008，JPO＆INPIT

8. 发明专利

JP2007248931A Image forming apparatus 审中-公开
标题翻译：图像形成装置
公开(公告)号：JP2007248931A
公开(公告)日：2007-09-27
申请号：JP2006073655
申请日：2006-03-17
申请人： Ricoh Co Ltd , 株式会社リコー
发明人： KOYAMA HAJIME , ECHIGO KATSUHIRO , TAMIYA TAKAHIRO
IPC分类号： G03G15/16 , G03G15/01
CPC分类号： G03G15/1635 , G03G15/1605 , G03G15/161 , G03G2215/0129 , G03G2215/1623 , G03G2221/1642
摘要： PROBLEM TO BE SOLVED: To provide an image forming apparatus designed such that a bias having the same polarity as toner is applied while a leak is prevented between bias application electrodes in a primary transfer nip, thus transfer dust or reversal transfer in the primary transfer are prevented, in addition, an electric field that prevents transfer of toner from an intermediate transfer belt to the recording medium is applied to the adhesion failure area between an intermediate transfer belt and recording medium, which is further upstream of a secondary transfer nip on the intermediate transfer belt, thus, pre-transfer and transfer dust are prevented in secondary transfer.
SOLUTION: The image forming apparatus 100 applies a bias having the same polarity as the regular charge polarity of toner by a bias application member in a position further backward than a primary transfer bias application device. In addition, the apparatus 100 starts the contact of a recording medium with a toner image on a primary transfer belt 10 in a position further forward than the secondary transfer nip. Also, the apparatus 100 includes an electrode that forms an electric field for enhancing electrostatic attraction between the regular charge polarity toner and the primary transfer belt 10 in the contact start part.
COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：要解决的问题：提供一种图像形成装置，其被设计为使得在一次转印夹持部中的偏置施加电极之间防止泄漏的同时施加与调色剂具有相同极性的偏置，从而在灰度或转印防止一次转印，此外，防止将调色剂从中间转印带转印到记录介质上的电场施加到中间转印带和记录介质之间的粘附破坏区域，该中间转印带和记录介质进一步在二次转印辊隙的上游在中间转印带上，因此在二次转印中防止了预转印和转印灰尘。解决方案：图像形成装置100通过偏置施加构件在比一次转印偏压施加装置更进一步的位置施加与调色剂的常规电荷极性相同极性的偏压。此外，装置100在比二次转印夹持部更靠前的位置开始与一次转印带10上的调色剂图像的记录介质的接触。此外，装置100包括形成电场的电极，用于增强接触开始部分中常规电荷极性调色剂和一次转印带10之间的静电吸引。版权所有（C）2007，JPO＆INPIT

9. 发明专利

JP2007241014A Image forming apparatus 审中-公开
标题翻译：图像形成装置
公开(公告)号：JP2007241014A
公开(公告)日：2007-09-20
申请号：JP2006065167
申请日：2006-03-10
申请人： Ricoh Co Ltd , 株式会社リコー
发明人： ECHIGO KATSUHIRO , TAMIYA TAKAHIRO , KOYAMA HAJIME
IPC分类号： G03G15/16
摘要： PROBLEM TO BE SOLVED: To provide an image forming apparatus designed such that a defect such as nonuniform transfer resulting from bends in a plurality of bias rollers is prevented as well as an image defect caused by the bias rollers and longitudinal nonuniform pressure, particularly, image defects such as nonuniform transfer and worm hole image are effectively prevented, and therefore a high quality image can be formed.
SOLUTION: The image forming apparatus 1 includes: backup rollers 103 and 104 disposed in contact with the corresponding bias rollers 101 and 102 so as to be opposite to contact parts between the corresponding bias rollers and the image carrier.
COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：要解决的问题：为了提供一种图像形成装置，其被设计成防止由多个偏压辊中的弯曲引起的不均匀转印的缺陷以及由偏压辊和纵向非均匀压力引起的图像缺陷，具体地讲，图像缺陷如不均匀的转印和蜗杆孔图像被有效地防止，并且因此可以形成高质量的图像。图像形成装置1包括：与相应的偏压辊101和102接触设置的支撑辊103和104，以便与相应的偏压辊和图像载体之间的接触部分相对。版权所有（C）2007，JPO＆INPIT

10. 发明专利

JP2007171784A Image forming apparatus 有权
标题翻译：图像形成装置
公开(公告)号：JP2007171784A
公开(公告)日：2007-07-05
申请号：JP2005372221
申请日：2005-12-26
申请人： Ricoh Co Ltd , 株式会社リコー
发明人： KOYAMA HAJIME , ECHIGO KATSUHIRO , TAMIYA TAKAHIRO , KIKUCHI HISASHI
IPC分类号： G03G15/16
摘要： PROBLEM TO BE SOLVED: To provide an image forming apparatus that prevents a transfer-abnormality image, such as an image with partial deficiency and a void image, principally due to excessive pressing of a nip part while maintaining less scattering during transfer, high efficiency, and a high transfer rate, and to provide an image forming apparatus that applies a bias having the same polarity with toner for transfer scattering prevention and reversing prevention to the entrance side/exit side of a transfer nip part while surely securing a necessary mechanical transfer nip and preventing a leak between a plurality of bias application electrodes provided in the transfer nip.
SOLUTION: The image forming apparatus 150 is configured such that a primary transfer nip during primary transfer operation abuts in a state the same nip width is formed irrelevantly to whether there is contact pressure of a bias applying means 5 on a primary transfer member 10.
COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：要解决的问题：为了提供一种图像形成装置，其主要是由于压区部分的过度按压，同时在转印期间保持较少的散射，从而防止诸如具有部分缺陷和空白图像的图像的转印异常图像，高效率和高转印速率，并且提供一种图像形成装置，其将转印散射防止和反转防止用调色剂具有相同极性的偏压施加到转印夹持部的入射侧/出射侧，同时确保必要的机械转印辊隙，并防止设置在转印辊隙中的多个偏压施加电极之间的泄漏。解决方案：图像形成装置150被构造成使得在一次转印操作期间的一次转印辊隙在与第一转印件上的偏置施加装置5的接触压力无关地形成相同辊隙宽度的状态下相接触 10.版权所有（C）2007，JPO＆INPIT

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