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公开(公告)号：US4709630A
公开(公告)日：1987-12-01
申请号：US8086
申请日：1987-01-21
摘要： Apparatus for printing any line of characters comprises printing wheels on a common shaft, the wheels on the shaft together defining a printing line over a hammer. Each printing wheel is rotated by a respective stepping motor through a respective setting wheel. An aligner bar is inserted into notches in the wheels, prior to printing, to verify the alignment of the characters in printing position. The stepping motors are bi-directional and take the shortest path from a preceding printing position to the next printing position. The pulsing frequency may be ramped to give a higher stepping rate in the intermediate portion of each printing wheel movement.
摘要翻译： 用于打印任何字符行的装置包括在公共轴上的印刷轮，所述轴上的轮一起在锤上定义印刷线。 每个印刷轮由相应的步进电机通过相应的调整轮旋转。 在打印之前，将对准器条插入车轮中的凹口中，以验证打印位置中字符的对齐。 步进电机是双向的，并且从前一个打印位置到下一个打印位置的最短路径。 脉冲频率可以倾斜以在每个印刷轮运动的中间部分中提供更高的步进率。
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公开(公告)号：US4552065A
公开(公告)日：1985-11-12
申请号：US650989
申请日：1984-09-17
申请人： Donald G. Billington , Reginald D. Brooker , Harry Powell , Roger Walker , David R. G. Wilkins , Stuart Weaver
发明人： Donald G. Billington , Reginald D. Brooker , Harry Powell , Roger Walker , David R. G. Wilkins , Stuart Weaver
摘要： This invention is concerned with the high speed printing of a line of text on a sheet in very accurate registration with an edge of the sheet or another feature (for example an existing print line) on the sheet. The sheet is fed without preregistration on to a track (10, FIG. 1) which passes the printing station (20). A detector (16) adjacent the track senses the arrival of the edge or some other feature of the sheet and a printing control means (14) responsive to the detector signal initiates the firing of the printing hammer (22) when the print line reaches the printing station, a registered operation being thereby effected without stopping the sheet. The detector signal may start the operation of a counter (70, FIG. 4) and a firing signal is sent to the hammer control circuit (100, 102, 104) when the count reaches a value dependent on the distance between the detector and the point at which the printing operation takes place and (unless the new print is to be in alignment with a detected print line) also dependent on the distance on the sheet between the edge or feature detected and the position at which the new print is to appear.
摘要翻译： 本发明涉及与片材的边缘或片材上的另一特征（例如现有的印刷线）非常精确对准的片材上的文本行的高速打印。 片材被馈送而不预先登记到通过印刷站（20）的轨道（图1）上。 邻近轨道的检测器（16）感测边缘的到达或片材的某些其他特征，并且响应于检测器信号的打印控制装置（14）在打印线到达打印线时启动打印锤（22）的点火 打印站，从而在不停止纸张的情况下进行登记操作。 检测器信号可以开始计数器的操作（图4中的70），并且当计数达到取决于检测器和检测器之间的距离的值时，点火信号被发送到锤控制电路（100,102,104） 打印操作发生的点（除非新的打印与检测到的打印行对齐），也取决于检测到的边缘或特征之间的纸张上的距离以及新打印出现的位置 。
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