DEVICE IN SPINNING PREPARATION FOR IDENTIFYING FOREIGN BODIES MADE OF PLASTICS MATERIAL, SUCH AS POLYPROPYLENE TAPES, FABRICS AND FILMS OR THE LIKE IN OR AMONG FIBRE FLOCKS, FOR EXAMPLE MADE OF COTTON

摘要

In order to improve a device in spinning preparation for identifying foreign bodies made of plastics material, such as polypropylene tapes, fabrics and films or the like, in or among fibre flocks, for example made of cotton, a source using polarized light acts on the fibre material (fibre flocks) and on the foreign bodies and cooperates with a detector which uses the reflected light to allow simultaneous detection of the foreign bodies with the aid of the colour information and of the surface gloss.