a wire printer printing head comprises a support member , a plurality of printing elements having a print wire with a flap - armature electromagnet and a sound absorbing cover . the printing element are radially and slidably mounted to the support member and adjustable to a mounting position of each printing element with respect to the support member by an eccentric pin . the sound absorbing cover composed of a core plate and sound absorbing material is secured to the support member and surrounds all printing elements .