| 摘要 |
In a needle felting machine, the needle board is composed of a plurality of strip-like laminae, the width of which determine the thickness of the board, each lamina being provided with a plurality of superficial, transverse grooves which, when aligned with the grooves of an adjacent lamina, form preferably circular bores for the reception of felting needles. The bores are distributed over the board in a predetermined needle pattern. The laminae may be provided with projections or dowels to assist the alignment of the grooves, and the laminated structure is formed between pairs of end and side sections which are clamped or screwed together, Fig. 3 (not shown). The needles, which are positioned in the grooves during the assembly of the laminated structure, may have bent end portions engaging the upper surface of the board, or may have bead-like projections engaging complementary recesses in the grooves, Figs. 4 and 5 (not shown). The grooves may advantageously be disposed at an angle to the plane of the board. To assist in the retention of the needles in the grooves during assembly, the laminae may consist of magnetically active material.
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