Control of fibers in apron drafting systems of machinery used in the spinning process

In an apron drafting system of a spinning frame of the type which includes a back draft between a first pair of rolls and a second pair of rolls, a front draft between said second pair of rolls and a third pair of front rolls wherein between said pairs of rolls the roving or sliver is drafted, a guidance zone defined between said second and third pairs of rolls by a top apron and a bottom apron, wherein the improvement comprises an improved fiber control which includes a projection means carried in engagement with said bottom apron in said guidance zone which includes at least one projection element carried transverse to said lower apron, said projection element being carried in a manner that is adjustable in its position within the bottom apron along the length of the guidance zone in the direction of sliver travel and independently adjustable in its position perpendicular to the direction of sliver travel, and said projection element being fixed against movement once adjusted to a desired position so that a prescribed guided path may be defined between said top and bottom apron in said sliver guidance zone which may be configured to permit effective control of the sliver in said fiber guidance zone between said aprons.