Twisting spindle threading - has lower injector and centering mechanism for simple threading through yarn brake assembly

摘要

There is an injector below the outlet end of the brake unit in the yarn brake of the two-for-one twisting spindle. The suction side of the injector is at the outlet side of the brake unit and the blowing side is at the spindle tube. There is at least one eccentrically aligned channel in the yarn brake leading to the injector, opening at a yarn entry surface of the yarn brake. There is a sleeve with a longitudinal slit at the coupling head, with a sealing surface acting with the end face to open at a feed for the compressed air. There is a supporting edge for the downward pressure of the axially sliding part of the yarn brake. The inlet tube is centered at the longitudinal slit's suction opening to give the threading position for the coupling head with the yarn inlet. Design gives a compact mechanism for the pneumatic threading of yarn into a two-for-one twisting spindle, which is easily mounted to the unit, and which allows the yarn to be threaded without difficulty through the brake unit.