Spinning unit in open-end spinning machine

摘要

A spinning unit of an open-end spinning machine is disclosed which comprises a rotor having an inner wall, a bottom portion and an open end opposite to said bottom portion and arranged to rotate about a center axis perpendicular to said bottom portion; and a stationary closing member projecting into a spinning chamber of said rotor to thereby close the open end of said rotor and provided with a fiber supply duct which opens toward the inner wall of the rotor, and a yarn guide hole which opens in an end surface thereof opposite to the bottom portion of the rotor. The fiber supply duct is arranged in the closing member so that an inner wall of the fiber supply duct located on a side of the rotational center of the rotor is extended to be near to the rotational center of the rotor or to be over the rotational center of the rotor. The width of the fiber supply duct is established to be not larger than 90 percent of the diameter of the closing member.