3. A printer according to claim 4, wherein said storing means include a read only memory where the instructions for tracing each character are stored in form of a routine addressable by coded input signals, comprising a counter conditionable by said input signals for starting to count, and means for causing said addressing means to address the subsequent instructions of each routine by supplementing said input signals with the counting signals of said counter.
4. A printer according to claim 3, wherein the routine of each address contains the instructions relating to more than one character.