Apparatus for removing foreign material from a fiber processing line

In a fiber processing machine including

• a fiber opening roll supported for rotation and having a clothing arranged circumferentially thereon;
• a withdrawing roll adjoining said opening roll and supported for rotation for forwarding the fiber material to said opening roll;
• an optical sensor system for detecting foreign material carried on said opening roll along with said fiber material;
• an air stream generating device for directing an air blast to said clothing;
• and
• a control-and-regulating device;
• said optical sensor system and said air stream generating device being connected to said control-and-regulating device for operating said air stream generating device upon detecting foreign material by said optical sensor system to remove and carry away the foreign material from said clothing of said opening roll by an air blast;
• the improvement comprising a substantially vertically oriented feed chute for guiding the fiber material therein;
• said feed chute having a lower end;
• said withdrawing roll and said opening roll being disposed at said lower end;
• and said optical sensor system being supported above said opening roll and laterally of said feed chute.