| 摘要 |
A method of detecting the lengths of normal operation time and downtime, and at least approximate causes for downtime, of a printing press during each preassigned period of production time. During the progress of each production period there are derived from the printing press its electrical control signals which are indicative of the printing operation and at least approximate downtime causes. The control signals are sequentially recorded in the form of corresponding, visually identifiable marks. A visual examination of the marking provides the desired data. There is also disclosed herein a recorder of typical construction for recording the signals in the practice of the inventive method.
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