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21. 发明授权

US5491541A Developing apparatus having adjacent similar magnetic poles 失效
标题翻译：具有相邻类似磁极的显影装置
公开(公告)号：US5491541A
公开(公告)日：1996-02-13
申请号：US149793
申请日：1993-11-10
申请人： Tomoaki Yokoyama , Makoto Takase
发明人： Tomoaki Yokoyama , Makoto Takase
IPC分类号： G03G15/09
CPC分类号： B82Y15/00 , G03G15/0921
摘要： The present invention is characterized in that two magnetic poles of a magnetic member which are positioned to confront a nipping region between a sleeve and a photoreceptor in neighboring relation with each other are of the same polarity. These neighboring poles of the same polarity produce a distribution of magnetic flux density having first and second local maximum points and a local minimum point therebetween. A central angle .theta.1 between a line extending from a center of the magnetic member to the first local maximum point and a line extending the center to the local minimum point is smaller than a central angle .theta.2 between the line extending from the center to the local minimum point and a line extending from the center to the second local maximum point. Further, a developer material retained by the magnetic force of attraction generated by the neighboring magnetic poles of same polarity are kept in contact with the electorostatic latent image bearing member.
摘要翻译：本发明的特征在于，磁性构件的两个磁极被定位成相对于彼此相邻的彼此处于套筒和感光体之间的夹持区域的极性相同。相同极性的这些相邻极点产生具有第一和第二局部最大点和其间的局部最小点的磁通密度分布。在从磁性构件的中心延伸到第一局部最大点的线之间的中心角θ1和将中心延伸至局部最小点的线小于从中心延伸到第二局部最大点的线之间的中心角θ2 局部最小点和从中心延伸到第二局部最大点的线。此外，通过由相同极性的相邻磁极产生的吸引磁力保持的显影剂材料与静电潜像承载部件保持接触。

22. 发明授权

US4897331A Reversal image forming method 失效
标题翻译：反转图像形成方法
公开(公告)号：US4897331A
公开(公告)日：1990-01-30
申请号：US201215
申请日：1988-06-02
申请人： Naoki Toyoshi , Hiroshi Okamoto , Kenji Tabuchi , Kaoru Takebe , Tomoaki Yokoyama
发明人： Naoki Toyoshi , Hiroshi Okamoto , Kenji Tabuchi , Kaoru Takebe , Tomoaki Yokoyama
IPC分类号： G03G13/08 , G03G13/22
CPC分类号： G03G13/22 , G03G13/08
摘要： By utilizing an electrophotographic image forming process, a reversal image can be obtained in the following manner:charging a photosensitive member;forming an electrostatic latent image in a charged surface of the photosensitive member;developing the electrostatic latent image formed on the photosensitive member by using white toner;charging the photosensitive member again;developing the surface of the photosensitive member by using other toner different in color from the white toner; andtransferring the toner image formed on the photosensitive member onto a paper sheet.
摘要翻译：通过利用电子照相图像形成处理，可以以如下方式获得反转图像：对感光构件充电; 在感光构件的带电表面中形成静电潜像; 通过使用白色调色剂显影形成在感光构件上的静电潜像; 再次对感光部件充电; 通过使用与白色调色剂不同颜色的其它调色剂来显影感光构件的表面; 以及将形成在感光构件上的调色剂图像转印到纸张上。

23. 发明授权

US4891287A Image editing method 失效
标题翻译：图像编辑方法
公开(公告)号：US4891287A
公开(公告)日：1990-01-02
申请号：US201195
申请日：1988-06-02
申请人： Naoki Toyoshi , Hiroshi Okamoto , Kenji Tabuchi , Kaoru Takebe , Tomoaki Yokoyama
发明人： Naoki Toyoshi , Hiroshi Okamoto , Kenji Tabuchi , Kaoru Takebe , Tomoaki Yokoyama
IPC分类号： G03G13/22 , G03G15/04 , G03G15/22 , G03G15/36
CPC分类号： G03G15/36 , G03G15/04018
摘要： An image editing method utilizing an electrophotographic process, which method includes a first charging step of charging a photosensitive medium; a step of projecting an image onto the charged photosensitive medium to form an electrostatic latent image; a first developing step of developing the electrostatic latent image into a first powder image by the use of a first toner material having the same polarity as the charged polarity; a first transferring step of transferring the powder image onto a copying paper; a second charging step of again charging the photosensitive medium to a polarity the same as that of the charge established during the first charging step; a step of radiating rays of light to the charged photosensitive medium to remove the electrostatic charge at a specificed area of the photosensitive medium; a second developing step of developing the specified area of the photosensitive medium by the use of a second toner material different in color from the first toner material to form a second powder image; and a second transferring step of transferring the second powder image onto said copying paper so as to cover the first powder image which has been transferred onto the copying paper.
摘要翻译：一种使用电子照相方法的图像编辑方法，该方法包括对光敏介质充电的第一充电步骤; 将图像投影到带电光敏介质上以形成静电潜像的步骤; 第一显影步骤，通过使用具有与带电极性相同极性的第一调色剂材料将静电潜像显影成第一粉末图像; 将粉末图像转印到复印纸上的第一转印步骤; 第二充电步骤，其将所述感光介质再次充电到与在所述第一充电步骤期间建立的充电相同的极性; 将光线照射到带电的感光介质以去除感光介质的特定区域处的静电荷的步骤; 通过使用与第一调色剂材料不同颜色的第二调色剂材料来显影感光介质的指定区域以形成第二粉末图像的第二显影步骤; 以及第二转印步骤，将第二粉末图像转印到所述复印纸上，以覆盖已经转印到复印纸上的第一粉末图像。

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