Sliver opening device for separating out impurities and feeding fiber to an open end spring machine

A device for opening sliver into individual fibers and for feeding the fibers to a rotor of an open-end spinning machine, said device comprising:

• a housing having an interior chamber, an intake opening for the intake of sliver into said interior chamber, and an outlet opening for the passage therethrough of separated sliver fibers being fed from said interior chamber to the rotor;
• an opening roller rotatably disposed in said interior chamber for rotation in an opening direction to effect opening of sliver during transport of the sliver between said intake opening and said outlet opening;
• a sliver feed roller rotatably supported on said intake opening;
• an intake opening guide plate mounted in cooperative relation with said sliver feed roller to form therebetween a contact passage through which sliver is advanced by the sliver feed roller;
• and
• said housing including means for resisting any sticky trash material composed of insect residue or other material in the sliver separated from the fibers of the sliver;
• said housing having a discharge passage for discharge from the housing of trash material separated from the fibers, said resisting means defining a surface in said discharge passage with a coating of polytetrafluorethylene.