Abstract: A text processing device, for example a typewriter, comprising a first guide for text receiving sheet material, a carrier slidable along a second guide for a disc being rotatable about an axis and having flexible, radial symbol arms and a hammer mechanism mounted fixedly on the carrier opposite the first guide touching each symbol arm, wherein the disc has a central orifice for receiving a pin journalled in the carrier and being displaceable with the aid of a mechanism from a retracted position to a projecting operational position and conversely, in which projecting position the pin snaps into said orifice, whereas the disc is equipped with a registering member disposed near said central orifice and co-operating with a driving element setting the angular position of the disc, said driving element being journalled coaxially with the pin in the carrier.