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    • 2. 发明授权
    • Developing device and image forming apparatus
    • 显影装置和图像形成装置
    • US07899372B2
    • 2011-03-01
    • US12346907
    • 2008-12-31
    • Toshimasa Hamada
    • Toshimasa Hamada
    • G03G15/09
    • G03G15/09G03G15/0812G03G2215/0609
    • A developing device for an image forming apparatus includes both a layer height restricting blade for controlling a thickness of the developer layer on a developer supply roller, and a spike-height restricting blade. The spike-height restricting blade is located downstream from the layer height restricting blade, and upstream from the position at which an electrostatic latent image bearing member and the developer supply roller are closest to each other. Preferably, the tip of the spike-height restricting blade is located downstream from a radial line along which a main magnetic pole of the device projects half of its maximum magnetic field strength.
    • 用于图像形成装置的显影装置包括用于控制显影剂供应辊上的显影剂层的厚度的层高度限制刮刀和钉高度限制刀片。 钉高度限制刀片位于层高度限制刀片的下游,并且位于静电潜像承载部件和显影剂供给辊最靠近的位置的上游。 优选地,尖峰高度限制刀片的尖端位于径向线的下游,器件的主磁极沿着该径向线投射其最大磁场强度的一半。
    • 5. 发明申请
    • TRANSFER DEVICE AND IMAGE FORMING APPARATUS
    • 传输设备和图像形成设备
    • US20100303518A1
    • 2010-12-02
    • US12788710
    • 2010-05-27
    • Toyoka AIMOTOToshimasa Hamada
    • Toyoka AIMOTOToshimasa Hamada
    • G03G15/16
    • G03G15/1675G03G15/1605
    • A transfer device and an image forming apparatus capable of forming an image of smooth image quality with little uneven density, are provided. An alternating voltage is applied so that a first period in which a first peak-to-peak voltage Vpp(1) is applied and a second period in which a second peak-to-peak voltage Vpp(2), lower than the first peak-to-peak voltage, is applied are alternately repeated. In the alternating voltage to be applied, a transfer side potential to shift a toner from an intermediate transfer belt to recording paper sheet and an opposite transfer side potential to shift the toner from the recording paper sheet to the intermediate transfer belt are applied so as to alternate with each other. When f1 denotes a frequency of the first period and f2 denotes a frequency of the second period, f1=f2 is satisfied.
    • 提供能够形成平均图像质量的图像的转印装置和图像形成装置,其密度几乎不均匀。 施加交流电压,使得施加第一峰峰值电压Vpp(1)的第一周期和低于第一峰值电压Vpp(1)的第二周期,其中第二周期中第二峰值电压Vpp(2) 交替重复施加的峰值电压。 在要施加的交流电压中,施加将调色剂从中间转印带转移到记录纸张和相反转印面电位的转印面电位,以将调色剂从记录纸转移到中间转印带,以便 互相交替。 当f1表示第一周期的频率,f2表示第二周期的频率时,f1 = f2。
    • 6. 发明申请
    • IMAGE FORMING APPARATUS
    • 图像形成装置
    • US20090317143A1
    • 2009-12-24
    • US12488764
    • 2009-06-22
    • Toshimasa Hamada
    • Toshimasa Hamada
    • G03G15/09
    • G03G15/0907G03G2215/0609
    • There is provided an image forming apparatus capable of realizing Improvement of an image density by improving dot reproducibility and reducing fog as well. An alternating voltage is applied to a development sleeve so that a first period during which a first peak-to-peak voltage Vpp(1) is applied and a second period during which a second peak-to-peak voltage Vpp(2) that is lower than the first peak-to-peak voltage is applied are repeated alternately. The alternating voltage to be applied is applied so that a development-side potential to move toner from the development sleeve to a photoreceptor and an opposite development-side potential to move toner from the photoreceptor to the development sleeve alternate with each other A frequency of the second period is lower than a frequency of the first period.
    • 提供了一种图像形成装置,其能够通过提高点再现性和减少雾度来实现图像浓度的提高。 将交流电压施加到显影套筒,使得施加第一峰 - 峰值电压Vpp(1)的第一周期和第二周期期间,其中第二峰峰值电压Vpp(2)为 低于施加的第一峰峰值电压交​​替地重复。 施加的交流电压被施加使得显影侧电位将显影套筒中的调色剂移动到感光体和相对的显影侧电位,以将调色剂从感光体移动到显影套筒彼此交替A频率 第二期低于第一期的频率。
    • 7. 发明申请
    • IMAGE FORMING APPARATUS
    • 图像形成装置
    • US20090304414A1
    • 2009-12-10
    • US12481845
    • 2009-06-10
    • Toshimasa Hamada
    • Toshimasa Hamada
    • G03G15/09
    • G03G15/065G03G15/0907G03G2215/0634
    • There is provided an image forming apparatus capable of realizing improvement of an image density by improving dot reproducibility and reducing fog at the same time. An alternating voltage is applied to a development sleeve so that a first period during which a first peak-to-peak voltage Vpp(1) is applied and a second period during which a second peak-to-peak voltage Vpp(2) that is lower than the first peak-to-peak voltage is applied are repeated alternately. The alternating voltage to be applied is applied so that a development-side potential to move toner from the development sleeve to a photoreceptor and an opposite development-side potential to move toner from the photoreceptor to the development sleeve alternate with each other. The potential to be finally applied in the first period is preferably the development-side potential.
    • 提供了一种图像形成装置,其能够通过提高点再现性并同时减少雾度来实现图像浓度的提高。 将交流电压施加到显影套筒,使得施加第一峰 - 峰值电压Vpp(1)的第一周期和第二周期期间,其中第二峰峰值电压Vpp(2)为 低于施加的第一峰峰值电压交​​替地重复。 施加的交流电压被施加使得将显影侧电位从显影套筒移动到感光体和相对的显影侧电位,以将调色剂从感光体移动到显影套筒彼此交替。 在第一阶段最终应用的潜力优选是开发方面的潜力。
    • 8. 发明申请
    • DEVELOPING DEVICE AND IMAGE FORMING APPARATUS HAVING THE SAME
    • 开发装置和具有该装置的图像形成装置
    • US20080298850A1
    • 2008-12-04
    • US12130275
    • 2008-05-30
    • Nobuhiro MAEZAWAToshimasa Hamada
    • Nobuhiro MAEZAWAToshimasa Hamada
    • G03G15/09
    • G03G15/0928G03G2215/0634
    • A developing device and an image forming apparatus capable of restraining density irregularity and restraining a decline in image quality caused by adherence of carrier to a photoreceptor, are provided. An angle α is in a range of no less than 45 degrees nor more than 57 degrees, which is formed between a plane comprising a central line of magnetic pole formed by a regulating pole in a magnet roller and a rotating central axis of a developing sleeve and a plane comprising a central line of magnetic pole formed by a pumping pole and a rotating central axis of the developing sleeve. Further, an absolute value of the maximum value of strength of the magnetic pole formed by a main pole is in a range of no less than 120 mT nor more than 140 mT.
    • 提供了能够抑制密度不均匀性并且抑制由载体粘附到感光体而导致的图像质量下降的显影装置和图像形成装置。 角度α在不小于45度且不大于57度的范围内,其形成在包括由磁辊中的调节杆形成的磁极的中心线和显影套筒的旋转中心轴线的平面 以及包括由抽极极和显影套筒的旋转中心轴形成的磁极的中心线的平面。 此外,由主极形成的磁极的强度的最大值的绝对值在不小于120mT或不大于140mT的范围内。
    • 9. 发明授权
    • Transfer device and image forming apparatus
    • 转印装置和图像形成装置
    • US08326195B2
    • 2012-12-04
    • US12788710
    • 2010-05-27
    • Toyoka AimotoToshimasa Hamada
    • Toyoka AimotoToshimasa Hamada
    • G03G15/20
    • G03G15/1675G03G15/1605
    • A transfer device and an image forming apparatus capable of forming an image of smooth image quality with little uneven density, are provided. An alternating voltage is applied so that a first period in which a first peak-to-peak voltage Vpp(1) is applied and a second period in which a second peak-to-peak voltage Vpp(2), lower than the first peak-to-peak voltage, is applied are alternately repeated. In the alternating voltage to be applied, a transfer side potential to shift a toner from an intermediate transfer belt to recording paper sheet and an opposite transfer side potential to shift the toner from the recording paper sheet to the intermediate transfer belt are applied so as to alternate with each other. When f1 denotes a frequency of the first period and f2 denotes a frequency of the second period, f1=f2 is satisfied.
    • 提供能够形成平均图像质量的图像的转印装置和图像形成装置,其密度几乎不均匀。 施加交流电压,使得施加第一峰峰值电压Vpp(1)的第一周期和低于第一峰值电压Vpp(1)的第二周期,其中第二周期中第二峰值电压Vpp(2) 交替重复施加的峰值电压。 在要施加的交流电压中,施加将调色剂从中间转印带转移到记录纸张和相反转印面电位的转印面电位,以将调色剂从记录纸转移到中间转印带,以便 互相交替。 当f1表示第一周期的频率,f2表示第二周期的频率时,f1 = f2。