| 摘要 |
An apparatus for printing quasi random number tables (as herein defined) comprising a flexographic printing press having at least two printing cylinders (9, 5, 7) with at least two of said cylinders (9, 5, 7) in the form of table printing cylinders having different circumferences, the circumference of each cylinder being a multiple of a basic pitch value, each table printing cylinder (9, 5, 7) being arranged to print one or more rows or columns of numbers printed by the other table printing cylinders. Preferably the circumference of each cylinder is determined by the basic pitch value multiplied by a prime number. In one form of the invention the said table printing cylinders (9, 5, 7) include a pair of table printing cylinders (9, 5, 7) having different circumferences, each one of the pair of table printing cylinders (9, 5, 7) being arranged to print a plurality of rows of numbers, the numbers in each row being spaced from the other of the pair of table priting cylinders. |
