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    • 19. 发明授权
    • Image forming apparatus
    • 图像形成装置
    • US09256167B2
    • 2016-02-09
    • US14449270
    • 2014-08-01
    • Atsushi NagataKenji SugiuraNaohiro KumagaiSeiichi KogureJunpei FujitaYuuji WadaYusuke MitaniKazuki Yogosawa
    • Atsushi NagataKenji SugiuraNaohiro KumagaiSeiichi KogureJunpei FujitaYuuji WadaYusuke MitaniKazuki Yogosawa
    • G03G15/16
    • G03G15/1665G03G15/5058
    • An image forming apparatus includes an image bearer; a toner image forming unit, a transfer unit, a detector, and a controller. The toner image forming unit forms a plurality of types of density detection patterns on the surface of the image bearer in mutually-different positions in a surface-movement direction of the image bearer. The density detection patterns have mutually-different lengths in a direction orthogonal to the surface-movement direction of the image bearer. The transfer unit transfers the density detection patterns onto the surface of the transfer member. The detector detects image densities of the density detection patterns transferred on the surface of the transfer member. The controller calculates an image density difference between the density detection patterns on a basis of a detection result obtained by the detector, and corrects a transfer bias for transferring a toner image on a basis of a value of the image density difference.
    • 图像形成装置包括图像载体; 调色剂图像形成单元,转印单元,检测器和控制器。 调色剂图像形成单元在图像承载体的表面移动方向上的相互不同的位置的图像载体的表面上形成多种类型的浓度检测图案。 密度检测图案在与图像载体的表面移动方向正交的方向上具有相互不同的长度。 转印单元将浓度检测图案转印到转印部件的表面上。 检测器检测在转印部件的表面上转印的浓度检测图案的图像浓度。 控制器基于由检测器获得的检测结果来计算浓度检测图案之间的图像浓度差,并且基于图像浓度差的值来校正用于转印调色剂图像的转印偏压。
    • 20. 发明申请
    • IMAGE FORMING APPARATUS
    • 图像形成装置
    • US20150378284A1
    • 2015-12-31
    • US14742730
    • 2015-06-18
    • Yuuji WADAKenji SUGIURANaohiro KUMAGAISeiichi KOGUREJunpei FUJITAYusuke MITANIKazuki YOGOSAWA
    • Yuuji WADAKenji SUGIURANaohiro KUMAGAISeiichi KOGUREJunpei FUJITAYusuke MITANIKazuki YOGOSAWA
    • G03G15/16
    • G03G15/1695G03G15/161G03G15/1675G03G15/168
    • An image forming apparatus includes a transfer device to transfer a toner image onto a recording medium with a transfer bias applied thereto, a recording medium conveyor to deliver the recording medium to a transfer region while controlling an alignment of the recording medium having entered the transfer region in alignment control, and a transfer bias controller to obtain a toner adhesion amount information on a post-alignment-control toner image that passes through the transfer region after the recording medium is free from the alignment control, and to reduce, when the toner adhesion amount per unit area is less than a predetermined amount, the transfer bias after the alignment control is released to a level less than that of a transfer bias that is applied when the toner image having a same toner adhesion amount passes through the transfer region before the recording medium is free from the alignment control.
    • 图像形成装置包括:转印装置,用于将调色剂图像转印到具有转印偏压的记录介质上;记录介质传送器,用于将记录介质输送到转印区域,同时控制进入转印区域的记录介质的排列 以及转印偏压控制器,以便在记录介质不受对准控制之后获得通过转印区域的调色剂调色剂图像上的调色剂附着量信息,并且当调色剂附着 每单位面积的量小于预定量,则在对准控制之后的转印偏压被释放到低于在具有相同调色剂附着量的调色剂图像通过转印区域之前施加的转印偏压的水平 记录介质没有对准控制。