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公开(公告)号：US07941080B2
公开(公告)日：2011-05-10
申请号：US12050466
申请日：2008-03-18
CPC分类号： G03G15/0907
摘要： An image forming apparatus is provided with a photoconductive member on which a latent image is to be formed, a developing roller for developing the latent image formed on the photoconductive member by a first bias, and a magnetic roller for forming a magnetic brush thereon with a two-component developer and forming a thin toner layer on the developing roller by a second bias. If (D1) denotes the duty ratio of a first alternating-current bias included in the first bias and (D2) denotes the duty ratio of a second alternating-current bias included in the second bias, the duty ratios (D1, D2) satisfy the following relationship: D1>100−D2.
摘要翻译： 图像形成装置设置有要在其上形成潜像的感光体，用于通过第一偏压将形成在感光体上的潜像显影的显影辊和用于在其上形成磁刷的磁辊， 双组分显影剂并通过第二偏压在显影辊上形成薄的调色剂层。 如果（D1）表示包含在第一偏压中的第一交流偏压的占空比，（D2）表示包含在第二偏压中的第二交流偏压的占空比，占空比（D1，D2）满足 以下关系：D1> 100-D2。
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公开(公告)号：US20090003891A1
公开(公告)日：2009-01-01
申请号：US12142194
申请日：2008-06-19
IPC分类号： G03G15/08
CPC分类号： G03G15/065 , G03G15/0812 , G03G2215/0634
摘要： An image forming apparatus uses a two-component developer containing a toner and a carrier. The apparatus has a latent image bearer for bearing an electrostatic latent image. A toner bearer bears the toner to be conveyed to a development region to develop the electrostatic latent image. A developer bearer bears the two-component developer and supplies the toner to the toner bearer. A regulator sets the thickness of a toner layer carried on the toner bearer to 6 μm to 15 μm and sets a difference between a half width of a first toner charge number distribution as a number distribution of the charge amount of the toner carried on the toner bearer and that of a second toner charge number distribution as a number distribution of the charge amount of the toner in the two-component developer carried on the developer bearer to 0.8 (10−10 C/m) or smaller.
摘要翻译： 图像形成装置使用含有调色剂和载体的双组分显影剂。 该装置具有用于承载静电潜像的潜像载体。 调色剂承载件将要传送到显影区域的调色剂以显影静电潜像。 显影承载者承载双组分显影剂并将调色剂供应给调色剂承载体。 A调节器将承载在调色剂载体上的调色剂层的厚度设置为6μm至15μm，并且将第一调色剂电荷数分布的半值宽度之间的差作为调色剂上承载的调色剂的电荷量的数量分布 承载体和第二调色剂电荷数分布的载体数量分布，作为承载在显影剂载体上的双组分显影剂中的调色剂的电荷量的数量分布为0.8（10-10℃/ m）以下。
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公开(公告)号：US07613417B2
公开(公告)日：2009-11-03
申请号：US12142194
申请日：2008-06-19
IPC分类号： G03G15/09
CPC分类号： G03G15/065 , G03G15/0812 , G03G2215/0634
摘要： An image forming apparatus uses a two-component developer containing a toner and a carrier. The apparatus has a latent image bearer for bearing an electrostatic latent image. A toner bearer bears the toner to be conveyed to a development region to develop the electrostatic latent image. A developer bearer bears the two-component developer and supplies the toner to the toner bearer. A regulator sets the thickness of a toner layer carried on the toner bearer to 6 μm to 15 μm and sets a difference between a half width of a first toner charge number distribution as a number distribution of the charge amount of the toner carried on the toner bearer and that of a second toner charge number distribution as a number distribution of the charge amount of the toner in the two-component developer carried on the developer bearer to 0.8 (10−10 C/m) or smaller.
摘要翻译： 图像形成装置使用含有调色剂和载体的双组分显影剂。 该装置具有用于承载静电潜像的潜像载体。 调色剂承载件将要传送到显影区域的调色剂以显影静电潜像。 显影承载者承载双组分显影剂并将调色剂供应给调色剂承载体。 A调节器将承载在调色剂载体上的调色剂层的厚度设置为6μm至15μm，并且将第一调色剂电荷数分布的半值宽度之间的差作为调色剂上承载的调色剂的电荷量的数量分布 承载体和第二调色剂电荷数分布的载体数量分布，作为承载在显影剂载体上的双组分显影剂中的调色剂的电荷量的数量分布为0.8（10-10℃/ m）以下。
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公开(公告)号：US07787807B2
公开(公告)日：2010-08-31
申请号：US11820777
申请日：2007-06-20
申请人： Takahisa Nakaue , Shoichi Sakata
发明人： Takahisa Nakaue , Shoichi Sakata
IPC分类号： G03G15/09
CPC分类号： G03G15/0921 , G03G15/0808 , G03G2215/0609
摘要： A developing unit includes a development roller and a magnetic roller. Sleeves of the development roller and the magnetic roller are driven to rotate in the same circumferential direction. A first magnet is provided on the roller shaft in the sleeve of the development roller and a second magnet is provided on the roller shaft in the sleeve of the magnetic roller. The first and second magnets are opposed to each other so that opposite polarities face each other, and are supported non-rotatably in circumferential directions. The first magnet is supported so that the peak of the magnetic force of the first magnet is positioned upstream in the direction of rotation of the sleeve of the development roller from the straight line connecting the center of the roller shaft of the development roller to the center of the roller shaft of the magnetic roller.
摘要翻译： 显影单元包括显影辊和磁辊。 显影辊和磁性辊的套筒被驱动以在相同的圆周方向上旋转。 第一磁体设置在显影辊的套筒中的辊轴上，第二磁体设置在磁辊的套筒中的辊轴上。 第一和第二磁体彼此相对，使得相反的极性彼此面对，并且在圆周方向上被不可旋转地支撑。 第一磁体被支撑，使得第一磁体的磁力的峰值从显影辊的辊轴的中心连接到显影辊的中心的直线位于显影辊的套筒的旋转方向的上游 的磁辊的辊轴。
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公开(公告)号：US20080124137A1
公开(公告)日：2008-05-29
申请号：US11820777
申请日：2007-06-20
申请人： Takahisa Nakaue , Shoichi Sakata
发明人： Takahisa Nakaue , Shoichi Sakata
IPC分类号： G03G15/09
CPC分类号： G03G15/0921 , G03G15/0808 , G03G2215/0609
摘要： A developing unit includes a development roller and a magnetic roller. Sleeves of the development roller and the magnetic roller are driven to rotate in the same circumferential direction. A first magnet is provided on the roller shaft in the sleeve of the development roller and a second magnet is provided on the roller shaft in the sleeve of the magnetic roller. The first and second magnets are opposed to each other so that opposite polarities face each other, and are supported non-rotatably in circumferential directions. The first magnet is supported so that the peak of the magnetic force of the first magnet is positioned upstream in the direction of rotation of the sleeve of the development roller from the straight line connecting the center of the roller shaft of the development roller to the center of the roller shaft of the magnetic roller.
摘要翻译： 显影单元包括显影辊和磁辊。 显影辊和磁性辊的套筒被驱动以在相同的圆周方向上旋转。 第一磁体设置在显影辊的套筒中的辊轴上，第二磁体设置在磁辊的套筒中的辊轴上。 第一和第二磁体彼此相对，使得相反的极性彼此面对，并且在圆周方向上被不可旋转地支撑。 支撑第一磁体，使得第一磁体的磁力的峰值从显影辊的辊轴的中心连接到显影辊的中心的直线位于显影辊的套筒的旋转方向的上游 的磁辊的辊轴。
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16.发明授权Developing apparatus and method for regulating an AC bias frequency to the developing roller 有权用于调节显影辊的AC偏置频率的显影装置和方法公开(公告)号：US07043181B2
公开(公告)日：2006-05-09
申请号：US10814825
申请日：2004-04-01
申请人： Masashi Fujishima , Shoichi Sakata
发明人： Masashi Fujishima , Shoichi Sakata
IPC分类号： G03G15/08
CPC分类号： G03G15/0806 , G03G2215/0607
摘要： The electrophotographic image formation apparatus of the present invention adopts a developer roller, which is made of aluminum and has an aluminum oxide film of at least 5 μm in thickness formed on surface thereof. In the image formation apparatus, a gap between the developer roller and a photoreceptor drum 3 is set in a range of 150 to 300 μm. The image formation method of the present invention regulates a frequency of AC voltage in a non-development state to be higher than that in a development state, when an AC voltage is applied onto the developer roller to cause flight of toner from the developer roller to the photoreceptor, and selectively makes charged toner fly onto the electrostatic latent image for development. The present invention provides the effective development technique to prevent leakage of the applied voltage between the developer roller and the photoreceptor drum.
摘要翻译： 本发明的电子照相图像形成装置采用由铝制成的显影辊，其表面上形成有至少5μm厚的氧化铝膜。 在图像形成装置中，显影辊和感光鼓3之间的间隙设定在150〜300μm的范围内。 本发明的图像形成方法将非显影状态的交流电压的频率调节为高于显影状态时的交流电压的频率，当将交流电压施加到显影辊上以使得调色剂从显影辊飞行到 感光体，并且选择性地使带电调色剂飞到静电潜像上用于显影。 本发明提供了有效的开发技术，以防止施加的电压在显影辊和感光鼓之间的泄漏。
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17.发明授权公开(公告)号：US06917780B2
公开(公告)日：2005-07-12
申请号：US10173416
申请日：2002-06-13
IPC分类号： G03G15/08
CPC分类号： G03G15/0808 , G03G2215/0607 , G03G2215/0634
摘要： An image forming apparatus of non-contact developing method using two-component developer material which is capable of obtaining a clear image free from fogging, ghost and toner contamination. The image forming apparatus has at least one developing unit which includes a developing roll and a magnetic roll, the developing unit develops an electrostatic latent image on a photosensitive body with a toner thin layer formed on the surface of a developing roll wherein a toner thin layer forming region on the developing roll is smaller than a magnetic brush forming region on the magnetic roll. A high resistivity region is adjacent each end of the toner thin layer forming region on the developing roll. A control device controls a developer material replenishment and controls the biasing to the developing roll and magnetic roll.
摘要翻译： 一种使用双组分显影剂材料的非接触显影方法的图像形成装置，其能够获得没有起雾，重影和调色剂污染的清晰图像。 图像形成装置具有至少一个包括显影辊和磁性辊的显影单元，显影单元在感光体上显影，其中形成在显影辊表面上的调色剂薄层，其中调色剂薄层 显影辊上的成膜区域小于磁辊上的磁刷形成区域。 高电阻率区域与显影辊上的调色剂薄层形成区域的每一端相邻。 控制装置控制显影剂材料补充并控制对显影辊和磁辊的偏置。
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公开(公告)号：US06868240B2
公开(公告)日：2005-03-15
申请号：US10388563
申请日：2003-03-14
CPC分类号： G03G15/0907
摘要： To avoid developing ghost and selective developing without complicating a developing apparatus and to supply surly charged toner to a developing roll while unevenness of images is not generated to obtain stable images for a long time even when continuous printing, a method for developing in a hybrid developing apparatus is provided, which is characterized in that a data amount of each image, which an image forming apparatus prints and a number of paper sheets passed are detected and that an interval of the action of recovering and exchanging a toner layer on the developing roll to the magnetic roll after printing between paper sheets is variably set in accordance with a printing coefficient determined by the data amount and the number of paper sheets passed and further, a method for developing in a color tandem-type image forming apparatus provided with a plurality of the hybrid developing apparatuses for all different colors of toner, which are disposed along the moving direction of a transfer medium of images is provided, wherein after toner layers on the developing rolls of the all developing apparatuses are peeled off toward the magnetic rolls after developing, a thickness of the toner layer of the each developing apparatus is variably controlled at the beginning of developing in accordance with the image consistency of the developing apparatus having a highest image consistency among image data of toner colors.
摘要翻译： 为了避免在不使显影装置复杂化的情况下发生重影和选择性显影，并且即使在连续印刷时也不产生不均匀图像以获得稳定图像的显影辊中的充满电的调色剂，用于在混合显影中发展的方法 提供了一种装置，其特征在于，检测图像形成装置打印的每张图像的数据量和通过的纸张数量，并且将显影辊上的调色剂层回收和更换的动作的间隔设置为 根据由数据量和通过的纸张数量确定的打印系数，可变地设置在纸张之间打印之后的磁辊，并且还提供了一种在具有多个纸张的彩色串列型图像形成装置中显影的方法 用于所有不同颜色的调色剂的混合显影装置沿着a的移动方向设置 提供了图像的转印介质，其中在显影之后，在显影装置的显影辊上的调色剂层之后朝向磁性辊剥离，每个显影装置的调色剂层的厚度在显影开始时被可变地控制 根据调色剂图像数据之间具有最高图像一致性的显影装置的图像一致性。
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公开(公告)号：US06829448B2
公开(公告)日：2004-12-07
申请号：US10396080
申请日：2003-03-25
IPC分类号： G03G1508
CPC分类号： G03G15/0815 , G03G2215/0624
摘要： A method and apparatus for image forming includes a hybrid developing apparatus that supplies surly charged toner to a developing roll. The apparatus includes a developing roll that is electrically conductive at least on its surface. The image forming apparatus and the method have a constitution capable of applying an alternating current bias having a duty ratio in the range of 10 to 50% and a direct current bias superposed thereon. The developing roll is directly confronted with a latent image bearing body through an insulative toner thin layer at the nearest region of the developing roll and the latent image bearing body. An independent bias is applied to each of the developing roll and the magnetic roll, and the toner is refreshed by the varying duty ratio of the alternate current bias and the direct current bias after developing.
摘要翻译： 图像形成方法和装置包括向显影辊供给带电荷的调色剂的混合显影装置。 该装置包括至少在其表面上导电的显影辊。 图像形成装置和方法具有能够施加占空比在10〜50％的范围内的交流偏压和叠加在其上的直流偏压的结构。 显影辊在显影辊和潜像承载体的最近的区域处通过绝缘性调色剂薄层直接面对潜像承载体。 对显影辊和磁辊中的每一个施加独立的偏压，并且调色剂由显影后的交流偏压和直流偏压的变化占空比来刷新。
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公开(公告)号：US08155570B2
公开(公告)日：2012-04-10
申请号：US12413863
申请日：2009-03-30
申请人： Shoichi Sakata
发明人： Shoichi Sakata
CPC分类号： G03G15/0907
摘要： A first bias Vslv is applied to a development roller 22 and a second bias Vmag is applied to a magnetic roller 23 to perform development; after completion of development, without changing the setting of Vslv, of the AC component Vpp2 of Vmag, the peak voltage value Vpp2 (max) at the side with the same polarity as toner is made lower than during a development period and development-residual toner on the development roller 22 is collected to prevent a lateral streak formed on photoconductor drums 1a to 1d during a non-development period.
摘要翻译： 将第一偏压Vslv施加到显影辊22，并且将第二偏压Vmag施加到磁性辊23以进行显影; 在完成显影之后，不改变Vmag的AC分量Vpp2的Vslv的设定，使得与调色剂具有相同极性的一侧的峰值电压值Vpp2（max）低于显影期间，而显影残余调色剂 在显影辊22被收集以防止在非显影期间在感光鼓1a至1d上形成的横向条纹。
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