| 摘要 |
A printer, which includes a pair of green printing elements and a pair of black printing elements, causes a sequence of green, black, and white colored bars to exist on a tag, where the green and black bars are printed and the white bars are the tag color resulting from a lack of printing. The tag is moved through the printer in discrete steps of two bar widths at a time, so that two new areas of the tag are beneath each pair of printing elements after each discrete movement. Signals are then applied to those printing elements which are then to print bars. A ribbon, which is associated with each pair of printing elements, is moved one bar width each time a print signal is applied to the pair of printing elements. This movement occurs after the leading one of the printing elements prints and before the trailing one of the printing elements prints. Logic circuitry is also included for converting a binary code into signals representing the colored bar code and for providing necessary signals to the printing elements and the ribbons. The code-converting circuitry uses a module three up-down counter, and the then existing count in the counter represents the then required color bar. |
