Patent ID: 6907644

Claim:
The invention provides an apparatus for processing textile fibre material comprising: a fibre-processing machine; at least one spinning preparation machine; a pneumatic fibre-transporting line for transporting fibre material pneumatically from the fibre-processing machine to a said spinning preparation machine and comprising at least an upstream line portion, a downstream line portion and a fibre material feed fan between said upstream and downstream line portions; a differential pressure measurement device for measuring the pressure difference between said upstream line portion and said downstream line portion; a rotational speed measurement device for determining the speed of rotation of the fan; and a control device comprising a storage device for storing characteristic curves describing the dependence of volumetric air flow in the downstream line portion upon said pressure difference; wherein the control device is arranged to determine from the measured pressure difference and the determined speed of rotation the actual volumetric air flow and to effect adjustment of the apparatus towards a desired value of the volumetric air flow.