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    • 105. 发明授权
    • Toner for developing electrostatic image containing hydrophobized
inorganic fine powder
    • 用于显影含有疏水化无机细粉的静电图像的调色剂
    • US5827632A
    • 1998-10-27
    • US909877
    • 1997-08-12
    • Kohji InabaTatsuya NakamuraTatsuhiko ChibaTakao Ishiyama
    • Kohji InabaTatsuya NakamuraTatsuhiko ChibaTakao Ishiyama
    • G03G9/08G03G9/097
    • G03G9/0825G03G9/09716G03G9/09725
    • A toner for developing electrostatic images includes (a) toner particles having a weight-average particle size of 1-9 .mu.m, (b) hydrophobized inorganic fine powder having an average particle size of 10-90 nm and (c) hydrophobized silicon compound fine powder. The hydrophobized silicon compound fine powder has an average particle size of 30-120 nm, and a particle size distribution such that it contains 15-45% by number of particles having sizes of 5-30 nm, 30-70% by number of particles having sizes of 30-60 nm and 5-45% by number of particles having sizes of at least 60 nm. The hydrophobized silicon compound fine powder having a broad particle size distribution including coarse particles functions to prevent the embedding of the hydrophobized inorganic fine powder (functioning as a flowability improver) from being embedded at the toner particle surfaces, whereby the toner is allowed to exhibit stable performances even in a continuous image formation on a large number of sheets.
    • 用于显影静电图像的调色剂包括(a)重均粒径为1-9μm的调色剂颗粒,(b)平均粒度为10-90nm的疏水化无机细粉末和(c)疏水化硅化合物 细粉。 疏水化硅化合物细粉末的平均粒径为30〜120nm,粒径分布为15〜45个数量的粒径为5〜30nm,粒径为30〜70体积% 具有30-60nm的尺寸和5-45个数量的具有至少60nm的尺寸的颗粒。 疏水化硅化合物细粉末,其具有包括粗粒子的宽粒度分布的功能,以防止疏水化无机细粉末(作为流动性改进剂起作用)的嵌入被嵌入调色剂颗粒表面,从而调色剂显示稳定 即使在大量纸张上连续成像也能进行表演。
    • 107. 发明授权
    • Image-forming method and image-forming apparatus
    • 图像形成方法和图像形成装置
    • US5698354A
    • 1997-12-16
    • US599079
    • 1996-02-09
    • Toshiyuki UgaiTatsuya Nakamura
    • Toshiyuki UgaiTatsuya Nakamura
    • G03G9/08G03G9/087G03G15/01G03G13/01
    • G03G9/0819G03G15/0131G03G15/0194G03G9/08704G03G9/08795G03G2215/0103G03G2215/0119G03G2215/0164G03G2215/1628
    • An image-forming method is comprised of delivering a transfer-receiving medium to a first image-forming unit, forming a first toner image by a first image-forming means of the first image-forming unit, transferring the first toner image onto the transfer-receiving medium at a first transfer section of the first image-forming unit with a first transfer bias applied, and delivering the transfer-receiving medium to a second image-forming unit. Forming a second toner image by a second image-forming means of the second image-forming unit, transferring the second toner image onto the transfer-receiving medium carrying the first toner image at a second transfer section of the second image-forming unit with a second transfer bias applied, fixing the first toner image and the second toner image transferred on the transfer-receiving medium by a fixing means. The length of the transfer-receiving medium in the direction in which the transfer-receiving medium is conveyed is larger than the spacing between the first transfer section and the second transfer section. The intensity of the second transfer bias is different from the intensity of the first transfer bias. A first toner for forming the first toner image and a second toner for forming the second toner image both have shape factors of SF-1 ranging from 100 to 180 and SF-2 ranging from 100 to 140.
    • 图像形成方法包括将转印接收介质输送到第一图像形成单元,通过第一图像形成单元的第一图像形成装置形成第一调色剂图像,将第一调色剂图像转印到转印 在第一图像形成单元的第一传送部分处施加第一传送偏压,并将传送接收介质传送到第二图像形成单元。 通过第二图像形成单元的第二图像形成装置形成第二调色剂图像,在第二图像形成单元的第二转印部分将第二调色剂图像转印到携带第一调色剂图像的转印接收介质上, 施加第二转印偏压,通过固定装置固定转印在转印接收介质上的第一调色剂图像和第二调色剂图像。 传送接收介质在传送接收介质的传送方向上的长度大于第一传送部分和第二传送部分之间的距离。 第二转印偏压的强度与第一转印偏压的强度不同。 用于形成第一调色剂图像的第一调色剂和用于形成第二调色剂图像的第二调色剂均具有100-180的SF-1和100-140的SF-2的形状因子。