公开(公告)号：US4225249A

公开(公告)日：1980-09-30

申请号：US810329

申请日：1977-06-27

申请人： Howard G. Kettler ,  Robert A. Kolpek ,  Walter S. Rosenbaum

发明人： Howard G. Kettler ,  Robert A. Kolpek ,  Walter S. Rosenbaum

IPC分类号： B41J19/32 ,  B41J19/58 ,  B41J19/64 ,  B41J25/12 ,  B41J25/22 ,  G06F3/12 ,  G06F17/21 ,  G06K15/00 ,  G06K15/08

CPC分类号： B41J19/58

摘要： The aesthetic characteristics of adjacent characters are used to enhance the quality of output in a proportional spacing printer and to provide right margin justification for composing. Spacing between characters is determined on the basis of the character being printed and the preceding character already printed on the page. An intercharacter displacement memory contains a list of ideal spacing for all combinations of characters to be printed. As each character is typed, it and the previously stored preceding character address the intercharacter displacement memory. The output of the intercharacter displacement memory is the ideal value of escapement for this combination of characters and font style. The printer positions the print head prior to printing the next character, rather than positioning the print head after the previous character is printed. Line ending decisions for composing are eliminated during initial and final typing of a document by adding to the intercharacter displacement memory recommendations for altering the ideal spacing between characters, where aesthetically possible, to eliminate the need for line ending hyphenation. During initial keying, escapements for adjacent pairs of characters are totaled in a memory for ideal, shortest (tight), and longest (loose) recommended escapements. The line is automatically terminated within the justification range by a carrier return function based on the escapement totals and the selected right margin. Final playout of the page from memory alters the intercharacter escapements from the ideal values to either longer or shorter escapements depending on whether the line is to be lengthened or shortened.

摘要翻译： 相邻字符的美学特征用于提高比例间隔打印机的输出质量，并提供合适的边距校正。 基于正在打印的字符和已经打印在页面上的前一个字符来确定字符之间的间距。 字符位移记忆包含要打印的所有字符组合的理想间距列表。 当每个字符被输入时，它和先前存储的前一个字符都是地址字符位移存储器。 字符位移记忆的输出是字符和字体组合的擒纵机构的理想值。 打印机在打印下一个字符之前将打印头定位，而不是在打印前一个字符之后定位打印头。 在文本的初始和最终打字过程中，通过添加到字符位移记忆体的建议中消除了用于组合的行结束决定，以改变在美学上可能的字符之间的理想间距，以消除对行结束连字的需要。 在初始键入期间，相邻的字符对的擒纵系统总计在存储器中，用于理想的，最短（严密）和最长（松散）推荐的擒纵机构。 通过基于擒纵机构总计和选定的右边距的载体返回功能，该线路在对齐范围内自动终止。 从存储器的页面的最终播出将根据线是否被延长或缩短来改变从理想值到更长或更短的擒纵机构的字符擒纵机构。