Small serial printer

A small serial printer comprising:

• a type drum adapted to rotate about an axis perpendicular to the direction of a line of print on a printing paper, said type drum including a hollow cylindrical base member and at least two elastic type belts disposed around said base member at different levels on the circumference of said base member, each type belt having a plurality of types arranged on the surface of the type belt;
• a carriage for carrying said type drum in the direction of the line of print;
• and
• a hammer rotatably supported about an axis having a first end which leads into the interior of said type drum and is disposed opposite to the backside of the types of said type belts, and having a second end outside of said type drum and disposed to contact a cam member to rotate said hammer during movement of said carriage, wherein the first end of the hammer strikes the backside of one type of one type belt so that the type is pushed out against the printing paper to effect printing,
• wherein said carriage has a driving gear which engages a drum gear and said printer has a clutch gear provided on a frame side of said printer to mesh with said driving gear when said carriage comes to a determined position, said clutch gear being interlocked with a paper feed worm gear through a spring clutch, so that the printing paper is fed by rotating a paper feed roller through a paper feed gear in mesh with said worm gear and said spring clutch is controlled through a lever which engages said carriage.