Abstract: A slip ring assembly comprising a fixed base unit and a rotor unit. The fixed base unit has a fixed base, a plurality of electrode plates detachably attached to a plurality of slits formed on the fixed base, and a brush fixed on each of the electrode plates. The rotor unit has a rotor shaft, a plurality of conductive rings and insulation spacers alternately placed on top of each other on the outer periphery of the rotor shaft in a detachable state so that each of the conductive rinds is positioned to correspond to each brush.

Abstract: A serial color printer equipped with a cassette holder (3) that carries an ink ribbon cassette (3) dismountably on a carriage (2) of a printing head, and is tiltably mounted on said carriage (2) so that the ink ribbon may be moved in a direction vertical to said platen. The ink ribbon (7) includes a plurality of longitudinally parallel color regions, and can change the color adapted to the print line along with the movement of the cassette (3). The cassette holder (3) is connected operationally to a tilt arrangement, and the tilt arrangement is equipped with a cam mechanism (12, 15) mounted on the carriage (2), and a drive mechanism for driving said cam mechanism in conjunction with the carriage (2). The respective home positions of the carriage (2) and the cassette holder (3) are discerned by a single position sensor, and when the carriage (2) and the cassette holder (3) are in positions other than the home positions, the initial setting process of moving them to the home positions is carried out.

Abstract: A serial color printer equipped with a cassette holder (3) that carries an ink ribbon cassette (3) dismountably on a carriage (2) of a printing head, and is tiltably mounted on said carriage (2) so that the ink ribbon may be moved in a direction vertical to said platen. The ink ribbon (7) includes a plurality of longitudinally parallel color regions, and can change the color adapted to the print line along with the movement of the cassette (3). The cassette holder (3) is connected operationally to a tilt arrangement, and the tilt arrangement is equipped with a cam mechanism (12, 15) mounted on the carriage (2), and a drive mechanism for driving said cam mechanism in conjunction with the carriage (2). The respective home positions of the carriage (2) and the cassette holder (3) are discerned by a single position sensor, and when the carriage (2) and the cassette holder (3) are in positions other than the home positions, the initial setting process of moving them to the home positions is carried out.