needle rows are arranged at a first angle to the longitudinal direction and the second needle rows are arranged at a second angle to the longitudinal direction an absolute value of the second angle is different from an absolute value of the first angle application_number US 201615342745 A description fig1 shows a top view of an embodiment of the needle board according to the invention the individual needles 2 of the needle board are arranged in first needle rows 6 and second needle rows 7 and are indicated in this top view fig1 as dots the tips of these needles 2 project into the plane of the drawing beyond the base body 4 of the needle board in the embodiment shown each first or second needle row 6 7 comprises approximately 20 needles a needle row 6 7 usually comprises between 5 and 40 needles the expert is familiar with many different possible ways in which needles 2 can be attached to base body 4 of the needle board these ways include in particular the insertion of individual needles 2 into individual bores in base body 4 of the needle board it is also possible as shown in fig1 for individual needles 2 of a first or second needle.