| 摘要 |
<p>An electronic labeling apparatus (1) is disclosed which includes a printing mechanism (18) with web edge sensor (85) attached to a printhead (70) for transverse movement concurrent across an assembly (5,91,96,605,605a,620) of identification devices (6,95,97,606,606a,621) to be imprinted. The web edge sensor (85) provides a signal to a microprocessor (100) which indicates the presence or absence of the assembly (5,91,96,605,605a,620) under the current position of the web edge sensor (85). Utilizing the signal from the web edge sensor (85) a notch, tab, or other means on the assembly (5,91,96,605,605a,620) is detected to control vertical positioning of the assembly (5,91,96,605,605a,620) in the printing mechanism (18). The web edge sensor signal (85) is also used to measure the actual position of an edge of the assembly (5,91,96,605,605a,620), thereby allowing the microprocessor (100) to compute a skew offset value to be used in registering the printing horizontally on the identification devices (6,95,97,606,606a,621). Also disclosed is a means for processing the web edge sensor (85) signal in such a way as to allow the use of pre-printed identification devices (606,606a).</p> |
