on the protuberances are always on the right hand side of said protuberances to move printing elements 6 6 toward the printing section further these printing elements 6 6 have backward or return protuberances 6c 6c which are connected with the end of the backward or return armatures 5 39 two backward magnets 2 39 2 39 are enough to move back the said printing elements 6 6 one of these backward armature is placed at one inner side of casing and the other at opposite side of inner casing printing elements 6 6 themselves have wider portion at both ends and in this wider portion there are holes in which guides 7 7 are adapted purpose of guides 7 is to direct the movement of the printing elements 6 6 toward the printing section there is a guide hole 1 39 at the end of front side of casing and in this guide hole 1 39 printing portions of individual printing elements 6 6 freely reciprocate in accordance with the movement of armatures fig3 shows a section of a a in fig2 as shown in fig2 and fig3 comb type springs 8 8 are located by both sides of printing elements 6 6 at the rear portion of casing 1 and the inner ends terminal of comb spring 8 8 are disposed toward printing elements 6 6 and individual end of terminal is inserted into one of the sides of the incision or slot 9 9 of the wider rear end portion of printing elements 6 6 as shown in fig2 as individual printing elements 6 6 are supported by said comb type springs 8 8 when said printing elements 6 are operated and actuated by said forward and backward armature.