B41J 2/5058

Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by the process of building-up characters {or image elements} applicable to two or more kinds of printing or marking processes from an assembly of identical printing elements {using dot arrays providing selective dot disposition modes, e.g. different dot densities for high speed and high quality printing, array line selections for multi-pass printing, or dot shifts for character inclination locally, i.e. for single dots or for small areas of a character }