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    • 63. 发明公开
    • Image forming apparatus and process cartridge
    • 成像设备和处理盒
    • EP0716536A3
    • 1996-11-06
    • EP95119210.3
    • 1995-12-06
    • CANON KABUSHIKI KAISHA
    • Yoshinaga, KazuoSakai, KiyoshiNagase, YukioHashimoto, YuichiTanaka, Mamoru
    • H04N1/29
    • G03G15/326G03G15/04054G03G15/04072H04N1/29H04N1/40037
    • An image forming apparatus is constituted by an electrophotographic photosensitive member including a support and a photosensitive layer disposed on the support, charging means for charging the photosensitive member, exposure means for illuminating the charged photosensitive member with a light beam, developing means, and transfer means. The exposure means illuminates the charged photosensitive member with a light beam having a spot area (S) and said photosensitive layer has a thickness (T), wherein S and T provides the product (S x T) of at most 20,000 µm³ which is effective in improving a resolution and gradation reproducibility. The photosensitive member and at least one means selected from the group consisting of charging means, developing means, and cleaning means may preferably be integrally supported to form a process cartridge which is detachably mountable to an image forming apparatus main body.
    • 图像形成设备由电子照相感光构件构成,该电子照相感光构件包括支撑体和设置在支撑体上的感光层,用于给感光构件充电的充电装置,用光束照射带电感光构件的曝光装置,显影装置和转印装置 。 曝光装置用具有光点区域(S)的光束照射已充电的光敏元件,并且所述光敏层具有厚度(T),其中S和T提供至多20,000μm3的产品(S×T),这是有效的 在提高分辨率和渐变再现性方面。 感光元件和选自充电装置,显影装置和清洁装置中的至少一种装置可以优选整体支撑,以形成可拆卸地安装到成像设备主体上的处理盒。
    • 66. 发明公开
    • Electrophotographic color proofing system for gravure printed images
    • 用于凹版印刷图像的电子照相彩色打样系统
    • EP0601933A2
    • 1994-06-15
    • EP93402973.7
    • 1993-12-09
    • MINNESOTA MINING AND MANUFACTURING COMPANY
    • Zwadlo, Gregory L., c/o Minnesota Mining and
    • G03G5/06G03G15/01H04N1/29G03G13/01
    • H04N1/295G03G13/01
    • A color proofing system (10) effectively produces off-press proofs for gravure printed images using a high resolution electrophotographic printer by optimizing the deposition profile of a clustered dot cell of electrophotographically developed ink dots so as to more closely simulate the deposition profile of ink deposited in conventional and direct transfer (halftone) gravure printing processes. The three operating parameters of the electrophotographic process that are selectively modified during this process to produce are: (1) the spot image overlap of the laser beam profile; (2) the charge differentiation between the non-charged and charged areas on the photoconductor; and (3) the charge density associated with the toner particles deposited on the photoconductor surface. The gravure dot cells produced by this process can vary in both cell area and ink thickness. The resulting variation in ink thickness, graduated edge profile, and overlapping of adjacent gravure dot cells allows the ink deposited on top of a paper substrate by the electrophotographic process to more closely simulate the color and tone reproduction of ink that is absorbed into the paper in a gravure press printing. Thus, the tonal rendition of the finished off-press proof more accurately simulates gravure printing than any previously known gravure proofing process.
    • 彩色打样系统(10)通过优化电子照相显影墨点的聚集点单元的沉积轮廓,使用高分辨率电子照相打印机有效地产生用于凹版印刷图像的离机显示,以便更加接近地模拟沉积的沉积轮廓 在常规和直接转印(半色调)凹版印刷工艺中。 在该过程中选择性修改的电子照相过程的三个操作参数是:(1)激光束轮廓的斑点图像重叠; (2)光电导体上的不带电区域和带电区域之间的电荷差异; 和(3)与沉积在光电导体表面上的调色剂颗粒相关的电荷密度。 由此过程产生的凹版网点单元可以在单元面积和油墨厚度两方面变化。 所产生的墨水厚度变化,渐变边缘轮廓以及相邻凹版网点单元的重叠使得通过电子照相过程沉积在纸基材的顶部上的墨水更接近地模拟吸收到纸张中的墨水的颜色和色调再现 凹版印刷机。 因此,完成的离机证明的色调再现比任何先前已知的凹版印刷工艺更准确地模拟凹版印刷。