Method and apparatus for regulating out variations in the sliver weight on devices for processing fibre slivers

An apparatus for regulating out variations in the silver weight on a device for processing a fibre sliver, wherein said device has an inlet and an outlet for the fibre sliver and silver processing cylinders, comprising:

• a first measuring device for making a first cross-sectional measurement of the fibre silver, and forming a first test signal corresponding to this first measurement;
• a second measuring device located at a position adjacent to said silver processing cylinders and closer to the inlet of the device than said first measuring device for making a second measurement of the relative variations in the cross-section of the fibre material which is located on said silver processing cylinders relative to an average value of these variations formed over a predetermined period, and forming a second test signal corresponding to this second measurement;
• and
• a regulating device coupled to said first and second measuring devices for controlling the cross-section of the fibre silver in accordance with said first and second test signals.