| 摘要 |
<p>Mail processing system in which the letters (1) and the like are provided with a marking (6,7), such as a frame, for indicating the position of the post-code field (5) or other field relevant to the mail processing. The marking (6,7) is applied in a colour which is in the same spectrum as the colour with which the postcode and the like are filled in so that it can be used both for filling in and for machine reading-out, namely, in both cases, to indicate the correct position of the postcode or other control field. The marking (6,7) has a unique, machine-recognisable image pattern, such as a broken-line frame having a particular shape and structure known to the mail system. During reading-out, the image picked up is examined at the position of the unique marking (6,7) and the contents of the field found in this way are read out and converted into a process control signal. <IMAGE></p> |
