Patent ID: 9677197
Date: 2017-06-13
CPC Classifications: D01H

Claim:
1. A spinning station of a spinning preparation machine for producing a roving from a fiber bundle, comprising: a vortex chamber having an infeed opening for the fiber bundle fed in a transport direction of the fiber bundle; a roving forming element extending into the vortex chamber and having an inlet mouth; spin nozzles in a wall enclosing the vortex chamber and directed into the vortex chamber via which air is introduced into the vortex chamber in a specified direction of rotation in order to set the fiber bundle into rotation in the region of the inlet mouth of the yarn forming element; the roving forming element further comprising a draw-off channel that adjoins the inlet mouth via which the roving is drawn out of the vortex chamber; the wall of the vortex chamber comprising a transition section that adjoins the infeed opening and has the shape of a circumferential surface of a truncated cone, and a diameter that increases in the transport direction; wherein the spin nozzles lead into the vortex chamber in the transition section and each have a direction of flow that is oriented towards the wall enclosing the vortex chamber.