| 摘要 |
A recording sheet is successively fed in the abscissa direction by means of a sprocket. The recording sheet is previously printed with ruled lines with a predetermined inter-line space in the ordinate direction thereof. The sprocket is driven by a pulse motor. Displacement of the recording sheet from one to the next ruled line corresponds to the number of pulses supplied to the pulse motor. Before the beginning of the recording, a ruled line on the recording sheet is brought into positional coincidence with the recording pen. During the movement of the recording sheet after the recording operation having been started, a counter counts the pulses supplied to the pulse motor and is reset every time when the number of the pulses corresponding to the inter-line space has been attained. Upon termination of the recording, the contents in the counter represents the position of a recording pen relative to a certain ruled line. On the basis of the contents in the counter, the recording sheet is automatically fed in the abscissa direction. Upon occurrence of coincidence between the certain ruled line and the recording pen position, the feeding of the recording sheet is stopped. In this manner, the recording pen is always positioned in alignment with one of the ruled lines on the recording sheet at the beginning of the succeeding recording operation, requiring no manipulatability for the positional alignment.
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