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    • 82. 发明专利
    • Improvements in and relating to electrophotography
    • GB1133192A
    • 1968-11-13
    • GB270166
    • 1966-01-20
    • FUJI PHOTO FILM CO LTD
    • G03G13/045
    • 1,133,192. Electro-photographic processes. FUJI SHASHIN FILM K.K. Jan.20, 1966 [Jan.21, 1965], No.2701/66. Heading G2H. An electro-photographic process which avoids background development comprises electrostatically charging a photo-conductive insulating layer on a conductive support, imagewise exposing the charged layer to produce an electrostatic latent image, the layer being reversely and uniformly charged before developing the latent image, the potential contrast existing between the inexposed and exposed areas being maintained during the reverse charging. In an example, a layer of photo-conductive material is uniformly charged to have a potentional V o, Fig.2A, e.g. 1200 V. Exposure produces a potential contrast of #V, Fig. 2B, between unexposed portions X o to X 1 and exposed portions X 1 to X 2 . A reverse charge e.g. - 900 V causes the potential of the portion X 1 to X 2 to fall to V R , Fig. 2C, having an approximate value of 50 V which prevents background development.
    • 89. 发明授权
    • Image forming apparatus
    • 图像形成装置
    • US08532518B2
    • 2013-09-10
    • US13191707
    • 2011-07-27
    • Yuusuke Torimaru
    • Yuusuke Torimaru
    • G03G15/047G03G15/00G03G13/045
    • G03G15/161G03G15/0131G03G15/5054G03G15/5058G03G2215/0164
    • An image forming apparatus includes an image bearing member; an image forming portion for forming a toner image on the image bearing member, the image forming portion being capable of forming an image to be formed on a recording material and forming a control image for controlling an image density at a position adjacent to the image to be formed on the recording material; an intermediary transfer member rotatable while carrying the toner image transferred from the image bearing member; a transfer member for forming a transfer portion where the toner image is to be transferred from the intermediary transfer member onto the recording material; an electrostatic cleaning member for electrostatically removing the toner deposited on the transfer member; a density detecting portion, provided upstream of the transfer member with respect to a rotational direction of the intermediary transfer member, for detecting a density of the control image transferred on the intermediary transfer member; an adjusting portion for adjusting an image forming condition of the image forming portion depending on an output of the density detecting portion; and a charge amount changing portion for adjusting a charge amount of the control image transferred onto the intermediary transfer member.
    • 图像形成装置包括:图像承载部件; 图像形成部分,用于在图像承载部件上形成调色剂图像,图像形成部分能够形成要形成在记录材料上的图像,并且形成用于控制与图像相邻的位置处的图像浓度的控制图像 形成在记录材料上; 中间转印构件,可承载从图像承载构件转印的调色剂图像; 用于形成转印部分的转印部件,其中调色剂图像将从中间转印部件转印到记录材料上; 用于静电去除沉积在转印部件上的调色剂的静电清洁部件; 密度检测部分,设置在所述转印构件的相对于中间转印构件的旋转方向的上游,用于检测在中间转印构件上转印的控制图像的浓度; 调节部分,用于根据浓度检测部分的输出调节图像形成部分的图像形成条件; 以及充电量改变部分,用于调节转印到中间转印部件上的控制图像的电荷量。