Type wheel printer

Type wheel printer / line printer (for example, type roller printer, chain printer) With this old type of printer, in contrast to the dot matrix printer, entire lines are printed at once, not individual letters or parts of them. They were used in data centers to quickly print large quantities of paper, such as log files, payrolls, etc. They were the fastest printers in the age of dot matrix printers, with up to 1500 lines per minute. Elaborate paper guides ensured that the continuous paper, called tabulating paper, with an edge perforation could be printed cleanly at the high speed. A mechanical format control system made it possible to set different paper formats, which ensured an appropriate form feed. The ink was transferred to the paper with wide ink-impregnated cloth webs. bold printing was already possible.