Rieter

Spacing the top and bottom aprons

Index

The top  aprons are forced by spring pressure against the lower aprons. The intensity of fiber clamping, and thus fiber guidance, depends upon this pressure and also upon the distance between the two aprons. The pressing effect should be considerable, but not too high, otherwise it is impossible to achieve controlled drawing of fibers out of the clamped strand. The arrangement must also permit precise adaptation of the minimum distance to the fiber volume. In order to be able to maintain this closely defined minimum distance between the aprons, „distance pieces“ (Fig. 8, a) of variable height are interchangeably inserted between the nose bar of the lower apron and the cradle edge of the top apron, i.e. at exit opening M.

These distance pieces are given various names, such as spacers (Rieter), distance clips (Texparts), cradle spacers (Suessen). The correct distance piece to use can be determined within a broad range from tables provided by the manufacturers, but fine settings have to be established by experiment.

Fig. 8 – Exit opening M.