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1. 发明授权

US4740818A Electrophotographic reproduction apparatus and method with selective screening 失效
标题翻译：选择性筛选的电子照相再现装置和方法
公开(公告)号：US4740818A
公开(公告)日：1988-04-26
申请号：US940694
申请日：1986-12-11
申请人： George N. Tsilibes , Pierce B. Day , David E. Hockey , Tomas Roztocil , Dale Smith , John P. Swapceinski , John L. Steeves
发明人： George N. Tsilibes , Pierce B. Day , David E. Hockey , Tomas Roztocil , Dale Smith , John P. Swapceinski , John L. Steeves
IPC分类号： G03G15/01 , G03G13/01 , G03G15/00 , G03G15/04 , G03G15/043 , G03G15/047 , G03G15/22 , G03G15/36 , G03G21/00
CPC分类号： G03G15/04027
摘要： An electrophotographic reproduction apparatus and method are provided for reproducing an original document sheet that includes a continuous tone pictorial information area and a line-type information area. Rather than reproducing the entire document sheet with screening of both types of information, means are provided for selectively screening only the pictorial information area on the reproduction. The means of one preferred embodiment comprises a programmable illumination source that is programmed through inputs by the operator using a digitizing tablet to selectively image portions of a screen onto a charged photoconductive web prior to development of the electrostatic image formed on the web so that only the area on the web receiving the pictorial image is exposed to the screen. In another embodiment the programmable illumination source, such as LED's, modulates the portion of the image frame receiving an optical exposure of the pictorial information with the screen type exposure so that the pictorial information only is reproduced with a screen pattern. In still another embodiment a sensor automatically senses and determines the image portions to be selectively screened.
摘要翻译：提供一种电子照相再现装置和方法，用于再现包括连续色调图形信息区域和行式信息区域的原始文件。而不是通过筛选两种类型的信息来复制整个文档表，提供了用于仅选择性地筛选再现上的图形信息区域的装置。一个优选实施例的装置包括可编程照明源，其通过操作者的输入通过数字化图形输入器被编程，以在显影形成在幅材上的静电图像之前选择性地将屏幕的部分成像到带电的光导纤维网上，使得只有接收图形图像的网络上的区域暴露于屏幕。在另一个实施例中，可编程照明源（例如LED）通过屏幕型曝光来调制图像帧的部分接收图形信息的光学曝光，使得仅用屏幕图案再现图形信息。在另一个实施例中，传感器自动地感测并确定要选择性地屏蔽的图像部分。

2. 发明授权

US5075874A Communications interface for computer output printer 失效
标题翻译：计算机输出打印机的通讯接口
公开(公告)号：US5075874A
公开(公告)日：1991-12-24
申请号：US335657
申请日：1989-04-10
申请人： John L. Steeves , Anna M. Frart , Michael A. Higgins
发明人： John L. Steeves , Anna M. Frart , Michael A. Higgins
IPC分类号： G06F3/12
CPC分类号： G06F3/1209 , G06F3/1248 , G06F3/126 , G06F3/1284 , G06F3/1229
摘要： A computer output printer is provided with a communications interface having a plurlaity of input ports. Each port can be configured to emulate a different manufacturer's printer, and is provided with a buffer to store print messages while print messages from another port are being printed.
摘要翻译：计算机输出打印机设置有具有多个输入端口的通信接口。每个端口都可以配置为模拟不同的制造商的打印机，并且在打印来自另一个端口的打印消息的同时提供了缓冲器来存储打印消息。

3. 发明授权

US4964067A Computer output printer with plotter emulation 失效
标题翻译：具有绘图仪仿真功能的计算机输出打印机
公开(公告)号：US4964067A
公开(公告)日：1990-10-16
申请号：US338665
申请日：1989-04-11
申请人： Aline M. Honickman , John L. Steeves , Michael A. Higgins , Anna M. Frary
发明人： Aline M. Honickman , John L. Steeves , Michael A. Higgins , Anna M. Frary
IPC分类号： B43L13/00 , G06K15/00 , G06K15/22
CPC分类号： G06K15/00 , G06K15/22 , G06K2215/0014
摘要： A computer output printer includes a host computer interface that enables the printer to emulate a color pen plotter. Pen select commands are interpreted to select a halftone dot pattern, and plot commands are interpreted to define an outline of the line to be plotted, and fill the outline with the selected halftone dot pattern.
摘要翻译：计算机输出打印机包括主计算机接口，使打印机能够模拟彩色笔式绘图仪。笔选择命令被解释为选择半色调点图案，并且绘图命令被解释为定义要绘制的线的轮廓，并且用所选的半色调点图案填充轮廓。

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