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    • 5. 发明授权
    • Method and apparatus for forming high quality images in an electrostatic
printing machine
    • 用于在静电印刷机中形成高质量图像的方法和装置
    • US6006061A
    • 1999-12-21
    • US184674
    • 1998-11-02
    • Chu-Heng LiuWeizhong Zhao
    • Chu-Heng LiuWeizhong Zhao
    • G03G15/11G03G15/16
    • G03G15/11
    • A method and apparatus for producing high quality toner images in an electrostatic printing machine. The method using the apparatus includes (a) forming an initial developed toner image on a photoreceptor using initial developed toner image forming assemblies including a first charging device for uniformly charging the photoreceptor, and a development assembly including charged toner solids having a single charge polarity; and (b) refining the initial developed toner image using reverse charge printing (RCP) assemblies including a second charging device for reversing charge polarity on unwanted toner solids in background areas of the initial developed toner image, and for removing such unwanted toner solids from such background areas, thereby producing a high quality final toner image having sharp image area edges and highly clean background areas.
    • 一种用于在静电印刷机中制造高质量调色剂图像的方法和装置。 使用该装置的方法包括:(a)使用初始显影的调色剂图像形成组件在感光体上形成初始显影的调色剂图像,所述组合包括用于均匀地对感光体充电的第一充电装置,以及包括具有单一电荷极性的带电调色剂固体的显影组件; 和(b)使用反向电荷印刷(RCP)组件来精炼初始显影的调色剂图像,所述反相电荷印刷(RCP)组件包括用于反转初始显影的调色剂图像的背景区域中不需要的调色剂固体的电荷极性的第二充电装置,并且用于从其中除去这些不需要的调色剂固体 从而产生具有清晰图像区域边缘和高度干净的背景区域的高质量最终调色剂图像。
    • 6. 发明授权
    • Method and apparatus for developing high quality images in a liquid
immersion development machine
    • 用于在液浸式显影机中开发高质量图像的方法和装置
    • US5991582A
    • 1999-11-23
    • US184675
    • 1998-11-02
    • Chu-Heng LiuWeizhong Zhao
    • Chu-Heng LiuWeizhong Zhao
    • G03G15/11G03G15/10G03G15/16
    • G03G15/11
    • A method and apparatus for producing high quality liquid toner images in an electrostatic printing machine. The method using the apparatus includes (a) forming in a first stage, an initial developed toner image on a photoreceptor using toner image forming assemblies including a charging device; and exposure device; a development unit;; and (b) refining in a second stage, the initial developed toner image using a contact electrostatic printing (CEP) assembly including a bias source and a conductive CEP roll for biasing and applying compressive and tensile forces to the initial developed toner image to enable easy separation of image areas from background areas of the initial developed toner image, and for separating and removing unwanted toner solids from the background areas, thereby producing a high quality final toner image having sharp image area edges and highly clean background areas.
    • 一种用于在静电印刷机中生产高质量液体调色剂图像的方法和装置。 使用该装置的方法包括(a)在第一阶段中,使用包括充电装置的调色剂图像形成组件在感光体上形成初始显影的调色剂图像; 和曝光装置; 一个发展单位 并且(b)在第二阶段中,使用包括偏压源和导电CEP辊的接触静电印刷(CEP)组件在第二阶段中精炼,以对初始显影的调色剂图像施加压缩和拉伸力,使得易于 将图像区域从初始显影的调色剂图像的背景区域分离,并且用于从背景区域分离和去除不需要的调色剂固体,从而产生具有清晰图像区域边缘和高度干净的背景区域的高质量最终调色剂图像。
    • 7. 发明授权
    • Image forming reverse charge printing method and apparatus using image
area centered patches of toner
    • 图像形成反向电荷打印方法和使用图像区域居中的调色剂贴片的装置
    • US5991578A
    • 1999-11-23
    • US197793
    • 1998-11-23
    • Chu-Heng LiuWeizhong Zhao
    • Chu-Heng LiuWeizhong Zhao
    • G03G13/22G03G15/02G03G15/34
    • G03G15/34G03G13/22G03G15/0275G03G2217/0066
    • An efficient and high quality image forming method and apparatus wherein only selective scattered portions of an imaging surface are charged with a first charging device, and then coated with a layer of charged toner solids by a toner supply apparatus, thereby forming an "image area patch of toner"; wherein each selected scattered portion is centered relative to, and has an area slightly exceeding an area to be imaged; each such charged and coated portion is then image-wise exposed to form a first latent image; each such coated portion is subsequently recharged by a reverse charge printing (RCP) second charging device in an image-wise manner to create a secondary latent image having toner solids in image areas charged to a first polarity, and toner solids in background areas charged to a second and opposite polarity; and finally the toner solids in the image areas thereof are then transferred onto a copy substrate for fixing as an output document, thus leaving a significantly diminished quantity of non-development toner for subsequent removal from the photoreceptor.
    • 一种高效且高质量的图像形成方法和装置,其中只有成像表面的选择性散射部分被第一充电装置充电,然后通过调色剂供应装置涂覆带电的调色剂固体层,从而形成“图像区域贴片 的墨粉“; 其中每个选择的散射部分相对于中心,并且具有稍微超过要成像的区域的面积; 然后将每个这样的带电和涂覆部分成像地暴露以形成第一潜像; 每个这样的涂覆部分随后通过反向电荷印刷(RCP)第二充电装置以成像方式再次充电,以产生在充电到第一极性的图像区域中具有调色剂固体的二次潜像,并将背景区域中的调色剂固体装入 第二个和相反的极性; 最后将其图像区域中的调色剂固体转移到用于固定的复印基板上作为输出文件,从而留下显着减少的未显影调色剂,以便随后从感光体中除去。
    • 8. 发明授权
    • Air breakdown charge and development image forming method and apparatus
using image area centered patches of toner
    • US5991577A
    • 1999-11-23
    • US197753
    • 1998-11-23
    • Chu-Heng LiuWeizhong Zhao
    • Chu-Heng LiuWeizhong Zhao
    • G03G15/10G03G15/34G03G15/02
    • G03G15/34G03G15/101G03G2217/0066
    • A method and apparatus for producing high quality liquid toner images in an electrostatic printing machine. The method using the apparatus includes selectively coat a photoreceptor only in selected image area centered portion of the photoreceptor surface thereby forming an image area centered patch of toner with developing material; image-wise exposing each such portion; patch of toner. The method using the apparatus next includes forming a final toner image from each image area centered patch of toner using an air breakdown charge development (ABCD) assembly. The ABCD assembly includes a relatively large magnitude voltage biasing source, and a nip forming roll coupled thereto and forming a toner solids recharging nip with the photoreceptor, for image-wise recharging of the single polarity toner solids coating each image area centered patch of toner, by inducing an air breakdown electrical discharge in which free mobile ions are introduced into the vicinity of each image area centered patch of toner. The latent image underlying each image area centered patch of toner cooperates with the large magnitude voltage biasing source to cause free mobile ions to flow to the toner solids of each image area centered patch of toner in an image-wise manner corresponding to the underlying latent image. This, in turn, leads to image-wise recharging of the toner solids of each image area centered patch of toner in which toner solids in image areas of each patch then have a first polarity, and toner solids in background areas thereof then have a second and relatively opposite polarity. The method of the present invention then includes separating the image area toner solids of each patch of toner from the background area toner solids thereof, thereby resulting in an efficiently produced, quality toner image with significantly reduced non-development marking material generated and requiring removal.