Envelope addressing system adapted to simultaneously print addresses and bar codes

摘要

A structure for printing at least four elongated address lines allows maximum efficiency in the grouping together of print heads used for the printing. One print head is provided for each of the address lines, and the print heads are mounted so at least two of the print heads overlap each other, the overlapping print heads not being those for consecutive address lines. This means the print heads are positioned so that they are not in sequence with the numbers of the lines being printed. Transport rolls are mounted at either end of the print head with no other transport rollers or transporting structures between the print heads, and an electronic controller varies the time each of the print heads starts to print to correspond to the spacing of that print head so that all the lines may be printed with an aligned margin.