公开(公告)号：US3913524A

公开(公告)日：1975-10-21

申请号：US40077773

申请日：1973-09-26

申请人： RANK XEROX LTD

发明人： FUKUSHIMA OSAMU ,  SATO MASAMICHI ,  MATSUMOTO SEIJI

IPC分类号： G03G15/10

CPC分类号： G03G15/108

摘要： Electrostatic latent images are developed in a liquid electrophoretic developer, and during the development, developer immediately adjacent the image whose toner concentration has become depleted is removed from the image area and replaced by fresh developer. Images are thereby more fully developed to the extent of the electrostatic charge, eliminating edge and halo effects that result from incomplete development and the preferential attraction of toner to areas of higher electrostatic charge over adjacent areas of lower charge.

摘要翻译： 在液体电泳显影剂中显影静电潜像，并且在显影期间，紧邻着色剂浓度已经耗尽的图像的显影剂从图像区域中去除并被新鲜的显影剂代替。 因此，图像被充分地发展到静电电荷的程度，消除了由不完全显影引起的边缘和光环效应，以及将调色剂优先吸引到较低电荷相邻区域的较高静电电荷。

公开(公告)号：US3862619A

公开(公告)日：1975-01-28

申请号：US42362173

申请日：1973-12-10

申请人： RANK XEROX LTD

发明人： FUKUSHIMA OSAMU ,  SATO MASAMICHI ,  MATSUMOTO SEIJI

IPC分类号： G03G15/10

CPC分类号： G03G15/101

摘要： DEVELOPMENT OF AN ELECTROSTATIC LATENT IMAGE ON AN IMAGE CARRIER WITH LIQUID ELECTROPHORETIC DEVELOPER AND UTILIZING A CLOSELY SPACED DEVELOPMENT ELECTRODE, IS FACILITATED BY EMBOSSING THE SIDE EDGES OF THE CARRIER WITH EMBOSSMENTS THAT PROJECT ABOVE THE IMAGE SURFACE OF THE CARRIER. THESE EMBOSSMENTS ARE USED TO ESTABLISH AND MAINTAIN A FIXED SPACING BETWEEN THE ELECTRODE AND THE IMAGE SURFACE.

公开(公告)号：US3901698A

公开(公告)日：1975-08-26

申请号：US42684273

申请日：1973-12-20

申请人： RANK XEROX LTD

发明人： FUKUSHIMA OSAMU ,  OSAWA SADAO ,  KOMAKI TAKAO ,  SATO MASAMICHI

IPC分类号： G03G9/08 ,  G03G13/06 ,  G03G13/22

CPC分类号： G03G13/06 ,  G03G9/08

摘要： Process for electrophotographic discharge area development is provided comprising uniformly electrostatically charging a photoconductive insulating layer, exposing said photoconductive layer to an original image pattern of light and shadow, said photoconductive layer being discharged in areas corresponding to the light areas of the imaging pattern and retaining charge in areas corresponding to the shadow areas of the image pattern, said charged and discharged areas of said photoconductive layer resulting in the formation of an electrostatic latent image corresponding to the original image pattern, developing said electrostatic latent image with a first developer containing a toner which is substantially invisible when viewed against the photoconductive layer, said toner having the same or opposite polarity as that of charged areas on the photoconductive layer, whereby the toner preferentially adheres to areas of said layer wherein charged and discharged areas meet, such areas exhibiting an electric field gradient, thereafter, developing said electrostatic latent image with a second developer containing a colored toner which is visible when viewed against the photoconductive layer by contacting said layer with said second developer, said toner having the same polarity as that of the charged areas on the photoconductive layer, simultaneously establishing a potential between said second developer and the photoconductive layer, thereby depositing the color toner in the discharged areas of said layer forming a reversal image of the original image pattern.