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    • 14. 发明授权
    • Method of electrophotography using low intensity exposive
    • 使用低强度曝光的电子照相方法
    • US4256820A
    • 1981-03-17
    • US97512
    • 1979-11-26
    • Benzion Landa
    • Benzion Landa
    • G03G13/045G03G13/22G03G15/045G03G13/04
    • G03G15/045G03G13/045G03G13/22
    • My invention comprises an improved method of electrophotography which enables me to increase the effective speed of a photoconductor. The speed at which copies may be made is a function of the quantum of light falling on the photoconductive surface and the conductivity of the photoconductor under illumination. Since the rate at which a given photoconductor discharges the surface potential on the photoconductor through the action of light is limited, speed can be increased for a given photoconductor only by increasing the illumination. This requires energy and produces heat. My process deliberately underexposes a charged photoconductor to a light and shade image of the original to produce a weak latent electrostatic image of low contrast which is insufficient to make a satisfactory copy. I then mask the latent image with a liquid-carried toner while preventing deposition of the toner on the background areas. I then discharge the background areas with a blanket illumination of low intensity. The optical mask prevents the image areas from discharging while enhancing the constrast of the weak latent image. The enhanced image is then easily developed by any known developing method for making latent electrostatic images visible at a development station.
    • 我的发明包括改进的电子照相方法,使我能够增加光电导体的有效速度。 可以进行复印的速度是落在光电导表面上的光的量子和照明下的感光体的导电性的函数。 由于给定的光电导体通过光的作用而放电在感光体上的表面电位的速率受到限制,因此仅通过增加照明可以提高给定的光电导体的速度。 这需要能量并产生热量。 我的工艺故意将充电的感光器放在原来的光和阴影图像上,以产生低对比度的弱静电影像,这不足以制作令人满意的复印件。 然后我用液体携带的调色剂掩蔽潜像,同时防止调色剂沉积在背景区域上。 然后用低强度的毯子照明来排出背景区域。 光学掩模防止图像区域放电,同时增强弱潜像的对比。 然后通过任何已知的用于使静电图像在显影台处可见的显影方法容易地显影增强图像。
    • 17. 发明授权
    • Electrophotographic printing process for printing a carrier
    • 用于印刷载体的电子照相印刷工艺
    • US6162570A
    • 2000-12-19
    • US117929
    • 1998-11-24
    • Volkhard MaessMartin Schleusener
    • Volkhard MaessMartin Schleusener
    • G03G13/045G03G13/22G03G13/056
    • G03G13/045G03G13/22
    • In an electrophotographic printing process as well as an electrophotographic printer for printing a substrate, a photo-sensitive layered system is brought to a homogeneous initial state by impressing an electrical field having a first direction. The photoconductive layer is exposed with predetermined image structures according to the image. The entire photoconductive layer is exposed uniformly through the cover layer and/or the electrode layer. Charged toner particles are applied to the cover layer in a development step. The toner image is then transferred to the substrate. If more than one copy is required, the development step and the transfer step are carried out a number of times, the electrical charge image present inside the layered system being retained. The substrate is conveyed at a very high speed by a conveyor device in this operational state.
    • PCT No.PCT / DE97 / 00510 Sec。 371日期:1998年11月24日 102(e)日期1998年11月24日PCT 1997年3月13日PCT公布。 WO97 / 37286 PCT公开 日期1997年10月9日在电子照相印刷工艺以及用于印刷基板的电子照相打印机中,通过施加具有第一方向的电场使光敏层压体达到均匀的初始状态。 根据图像,光电导层以预定的图像结构曝光。 整个光电导层均匀地暴露于覆盖层和/或电极层。 在显影步骤中将带电的调色剂颗粒施加到覆盖层。 然后将调色剂图像转印到基底。 如果需要多于一个副本,则显影步骤和转印步骤进行多次,保留分层系统内存在的电荷图像。 在该操作状态下,通过输送装置以非常高的速度输送基板。
    • 18. 发明授权
    • Method for the formation of outline images corresponding to the
peripheral outlines of document's images
    • 用于形成对应于文档图像的外围轮廓的轮廓图像的方法
    • US4792775A
    • 1988-12-20
    • US16717
    • 1987-02-19
    • Tateki OkaNaoki ToyoshiTomoaki Yokoyama
    • Tateki OkaNaoki ToyoshiTomoaki Yokoyama
    • G03G13/045G03G13/22G03G15/00
    • G03G13/22G03G13/045
    • A method for forming an outline of an image. By this method, at first, an electrostatic latent image bearing member is charged and then irradiated to form an electrostatic latent image. Thereafter, the irradiated member is re-charged with a scorotron charger while applying a voltage to the scorotron grid, the voltage being slightly lower than the surface potential of the image portion of the latent image, and being substantially higher than the background potential of the latent image and being of the same polarity as that of the charging. By this re-charging, the outline portion of the image is given lower potential than the other portion. Then, the outline portion of the image with the lower potential is developed by a reversal development by using a toner charged to a polarity the same as the polarity of charging of the latent image bearing member.
    • 一种用于形成图像的轮廓的方法。 通过该方法,首先,对静电潜像承载部件进行充电,然后照射以形成静电潜像。 此后,将照射部件用灰火焰充电器再次施加电压到栅极栅极,该电压略低于潜像的图像部分的表面电位,并且显着高于该潜像的背景电位 具有与充电相同极性的潜像。 通过这种再充电,图像的轮廓部分被赋予比其他部分更低的电位。 然后,通过使用充电到与潜像承载部件的充电极性相同的极性的调色剂,通过反转显影来显现具有较低电位的图像的轮廓部分。
    • 19. 发明授权
    • Electrostatic image forming method
    • 静电成像方法
    • US4628017A
    • 1986-12-09
    • US793914
    • 1985-11-01
    • Izumi Tagoku
    • Izumi Tagoku
    • G03G13/045G03G15/05G03G13/044
    • G03G15/05G03G13/045
    • An electrostatic image forming method for various kinds of image forming apparatuses. At an exposing step, a light image having a light quantity region greater than a predetermined quantity of light is projected to form on a dielectric layer of a dielectric recording medium a positive electrostatic image which has such a tendency that the surface potential or the amount of surface charge is comparatively small in a region in which the quantity of light is comparatively large. A full-surface exposing step using a predetermined quantity of exposing light is added to before or after the exposure to the light image, so that the total quantity of exposing light exceeds a predetermined quantity of light. The quantity of light of the light image is controllable to a larger one which provides a positive electrostatic image on the dielectric layer, or to a smaller one which provides a negative latent image. After an image has been formed, a predetermined period of time for adaptation is provided to ensure a potential contrast so that a positive electrostatic latent image may be formed under advantageous image forming conditions.
    • 一种用于各种图像形成装置的静电图像形成方法。 在曝光步骤中,投射具有大于预定光量的光量区域的光图像,以在电介质记录介质的电介质层上形成正静电图像,所述正静电图像具有这样的趋势:表面电位或 在光量相对较大的区域中,表面电荷比较小。 在曝光到光图像之前或之后,使用预定量的曝光光进行全表面曝光步骤,使得曝光光的总量超过预定量的光。 光图像的光量可以控制到在介电层上提供正静电图像的较大的光量,或者可以提供提供负潜像的较小的图像。 在形成图像之后,提供适应的预定时间段以确保潜在的对比度,使得在有利的图像形成条件下可以形成正的静电潜像。