Mechanized devices that utilize multiple sets of rollers to straighten, draw out, and add a small amount of twist to cotton fibers prior to spinning, thus transforming slivers into slubbing. This is the first machine that the sliver is exposed to after leaving the drawing frame. In order to produce slubbing, cans containing slivers are placed in the rear of the device and, after passing through the device's rollers, are carried on a revolving spindle and ultimately wound onto a bobbin. Slivers can pass through these devices multiple times, depending on the desired refinement of the cotton thread. The process carried out by this device resembles the drawing process, through which the sliver is incrimentally transformed into smaller and smaller dimensions.
