. "However, to be precise, since the line heads 21 to 24, 31 to 34, 41 to 44, 51 to 54, 71 to 74, 81 to 84, 91 to 94 and 101 to 104 jet ink from center parts of the nozzles 21 a to 24 a, 31 a to 34 a, 41 a to 44 a, 51 a to 54 a, 71 a to 74 a, 81 a to 84 a, 91 a to 94 a and 101 a to 104 a, there is an interval as much as eight pixels secured between each of the center parts of the nozzles 21 a to 24 a" . . .