| 摘要 |
PURPOSE:To enhance printing quality by proving one character by one head and to make it possible to easily set the distances between heads, by setting the distances between the heads to an equal interval and the least common multiple of a printable line interval. CONSTITUTION:A plurality of heads 1a, 1b are arranged along the line direction of a paper 2 and the distance (d) between the heads 1a, 1b is set to an equal interval and the least common multiple of plural kinds of printable line intervals of the heads 1a, 1b. That is, the line interval is 1/4, 1/6 and 1/8 inch in a usual case and there are line feeds for one and two. Therefore, as actual line intervals, eight kinds of the above mentioned ones and 1/2, 1/3 and 1/4 inch twice the above-mentioned ones. The least common multiple of these intervals is 1 inch and the distance (d) between the heads is set to 1 inch. By this method, one character is printed by one head and printing grade is enhanced. Three heads 1a, 1b, 1c can be operated in an arrangement with one-inch intervals. |
