The impact printers include - with a single impact - the type wheel printer , the (type) teleprinter , the ball head printer and the cylinder head printer (e.g. the TTY); With a variable character set (and often graphics capability) the needle head and needle comb printer - and as line printer the drum or roller printer as well as the tape or chain printer .
Impact printers have the advantage that in a printing process - when using carbonless paper or self-durchschreibendem paper documents - more "copies" can be created. They are still used today to print invoices , delivery notes and other documents , mostly in continuous printing . Their disadvantage is the loud printing process. To avoid noise pollution, a soundproof hood is often put over or the printer is set up in an adjoining room.
Nowadays so-called non-impact printers such as the inkjet printer , the laser printer , the thermal printer (e.g. receipt, labels and fax) and the thermal sublimation printer as well as the thermal transfer printer (high-quality color separations) are used. Even for applications with several carbon copy sets, prints are often made using multiple printing (e.g. on a laser printer) - for example, to save costs for your own types of forms / paper and time for retooling forms on the printer.