| 摘要 |
A printing press machine for processing a web roll of labels, the printing press machine comprises a mark sensor at a predetermined location along the printing press machine for sensing the presence of a mark formed on each label on the web roll, the mark being at substantially the same position on each label on the web roll. A speed sensor is provided for sensing the position of at least one gear on or associated with the printing press machine to determine the speed at which the web roll of labels moves through the printing press machine. A control member monitors and adjusts where necessary the speed of the printing press machine so as to regulate the speed of the web roll as it moves through the printing press by co-ordinating the information received from the mark sensor and the speed sensor so that a label on the web roll will be properly positioned at a selected station of the printing press machine for attachment of a device to the label at the station.
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