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1.前言印刷机接收信息符号,并把它变为文字形式输出,同时能够获得硬考贝,这是记录通信、数据通信中最有代表性的终端设备。通常,终端用的控制打字机或计算机输出用的行式打印机,都是用活字和色带以机械冲击的方式在纸上印字,即所谓的“击打式印刷机”。这种方式由于机械冲击等不能不产生噪音。今后,随着数据通信服务等的进一步发展和终端设备的进一步普及,将迫切要求无噪音的印刷机。为此,近来大量进行着静电记录、墨水喷射式等非击打式印刷机的研究。非击打式印刷机和击打式印刷机比较具有如下的优缺点。缺点:1)难于同时复写;2)多数情况下,需要特殊纸;3)一般采用象素式印字,故印字质量较差。
1. Foreword The printing press receives the information symbol, and turns it into the form of the text output, simultaneously can obtain the hard test shell, this is the most representative terminal equipment in the record correspondence, the data communication. Often, end-use typewriters or line-type printers for computer output are all printed on paper with moving letters and ribbons in a mechanical shock, the so-called “impact printer.” This method can not but produce noise due to mechanical impact. In the future, with the further development of data communications services and the further popularization of terminal equipment, noiseless printers will be urgently required. To this end, a large number of recent static recording, ink jet and other non-impact printer research. Non-impact printers and impact printers compared with the following advantages and disadvantages. Disadvantages: 1) hard to copy at the same time; 2) in most cases, the need for special paper; 3) the general use of pixel-type printing, printing quality is poor.