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    • 2. 发明授权
    • Multiple xeroprinted copies from a single exposure using photosensitive
film buffer element
    • 使用感光膜缓冲元件从单次曝光中多次打印拷贝
    • US4898797A
    • 1990-02-06
    • US220867
    • 1988-07-18
    • William T. GruenbaumWilliam MeyKelly S. Robinson
    • William T. GruenbaumWilliam MeyKelly S. Robinson
    • G03G13/22
    • G03G13/22
    • Disclosed is a method of improving the sharpness of multiple copies made from a single imagewise exposure using an electrostatographic film buffer element having an insulating layer in between a conductive layer and a photoconductive layer, where the element is simultaneously charged and imagewise exposed and then uniformly exposed with light to bury the charges. The improvement consists of performing the uniform exposure with light that is absorbed by the photoconductive layer and does not penetrate through the photoconductive layer to the insulating layer. Also disclosed is apparatus useful for making multiple copies which comprises an electrostatographic film buffer element which comprises, (A) in order, a conductive layer, an insulating layer, and a photoconductive layer, (B) means for simultaneously charging the imagewise exposing the element, and (C) means for uniformly exposing the element with light that is absorbed by the photoconductive layer and does not penetrate through the photoconductive layer to the insulating layer. Also disclosed is a method of making multiple electrostatographic copies comprising simultaneously charging and imagewise exposing an electrostatographic film buffer element which comprises, in order, a conductive layer, an insulating layer, and a photoconductive layer, uniformly exposing the element with light that is absorbed by the photoconductive layer and does not penetrate through the photoconductive layer to the insulating layer, thereby forming a latent electrostatic image on the insulating layer, developing the latent electrostatic image and transferring the developed image to a receiver, and repeating the previous step without additional imagewise exposures of the element.
    • 公开了一种使用在导电层和光电导层之间具有绝缘层的静电放电薄膜缓冲元件来提高由单次成像曝光制成的多个拷贝的清晰度的方法,其中元件同时带电并成像曝光,然后均匀曝光 用光来埋葬费用。 该改进包括用光导电层吸收的光进行均匀曝光,并且不穿透光导电层到绝缘层。 还公开了可用于制造多个拷贝的装置,其包括静电放电膜缓冲元件,其包括(A)依次为导电层,绝缘层和光电导层,(B)同时对成像曝光元件 ,和(C)用光均匀地曝光该元件的装置,该光被光电导层吸收并且不穿透光电导层到绝缘层。 还公开了一种制备多个静电复印件的方法,包括同时对静电放电薄膜缓冲元件进行充电和成像曝光,该静电放电薄膜缓冲元件依次包括导电层,绝缘层和光电导层, 光电导层并且不穿透光导电层到绝缘层,由此在绝缘层上形成静电潜像,显影静电潜像并将显影的图像转印到接收器,并且重复前一步骤而无需额外的成像曝光 的元素。