Multiple-color recording apparatus

A multiple color recording apparatus comprising

• an input switching mechanism for successively selecting and delivering a plurality of input analog signals;
• a signal converter for converting said plurality of input analog signals into digital signals;
• a first memory for temporarily storing said digital signals;
• a paper feed mechanism for feeding and moving a sheet of recording paper;
• a recording means for recording dots in multiple colors on said sheet of recording paper, said recording means comprising a plurality of recording elements arranged along a direction transverse to direction of travel of said recording paper for recording different colors of dots;
• a head scanning mechanism for scanning said recording means;
• a second memory for temporarily storing digital signal related to the position of said recording means;
• and
• a processing unit operable on a predetermined program for reading all data out of said first memory and data out of said second memory, said unit adapted to effect a phase correction by a phase difference signal related to a reference recording element of each of said recording elements for correcting the color dot recording position to a predetermined position allocated to each data stored in said first memory and thereupon detect selective data out of said phase corrected data stored in said first memory having a minimum difference with said data stored in said second memory, and for moving said recording means along the direction of scanning by a selected interval in response to said minimum difference and for enabling said recording means to print dots on said sheet of recording paper when said minimum difference falls to zero, thereby to produce analog recording of signal levels of a plurality of input analog signals in the form of a dot pattern of different colors allocated to said signals respectively.