Apparatus for regulating fiber tuft quantities supplied to a carding machine

摘要

An apparatus for regulating fiber quantities to be supplied to a carding machine. The apparatus includes a duct in which the fiber material is pneumatically advanced; a feed mechanism to advance fiber material to the duct at a variable flow rate; a regulator connected to the feed mechanism for varying the flow rate; a pressure sensor disposed in the duct; an arrangement for generating first electric signals representing actual pressure values detected by the pressure sensor; an arrangement for differentiating the first signals over time to obtain second electric signals for correcting the first electric signals to obtain third electric signals representing corrected actual pressure values; and an arrangement for applying the third signals to the regulator for varying the flow rate of the fiber material, advanced by the feed mechanism, as a function of the signals.