Method and apparatus for evening the sliver produced by a card

Details Method and apparatus for evening the sliver produced by a card Method and apparatus for evening the sliver produced by a card

1987-05-21

1988-12-20

Rimrodt, Louis K.

Textiles: fiber preparation

Working

Carding

19106R, 19210, D01G 2306, D01G 1500, D01H 542

Patent

active

047917067

ABSTRACT:
A method of evening a sliver produced by a carding machine in which a predetermined output rate and draft are set. The method includes the steps of determining the actual weight of a predetermined sliver length by weighing; determining the difference between the actual sliver weight and a desired sliver weight; as a function of the difference altering the draft corresponding to a predetermined sliver thickness; measuring momentary actual thicknesses of the running sliver at a card output for a determined time period or sliver length and generating mechanical signals representing the momentary actual sliver thicknesses; converting the mechanical signals to first electric signals; combining the first electric signals into a second electric signal constituting an average of the first electric signals and representing the actual sliver thickness of the measured sliver; storing the second electric signal; applying the second electric signal to a computer; applying to the computer a third electric signal representing the actual sliver weight; and determining, with the computer and from a function between the actual sliver weight and the actual sliver thickness, a desired sliver thickness corresponding to a desired sliver weight.

REFERENCES:
patent: 4438548 (1984-03-01), Grunder
patent: 4494204 (1985-01-01), H/o/ sel
patent: 4530134 (1985-07-01), H/o/ sel
Article by Herbert Becker, Interkama 80, Bericht /u/ ber den 8. Internationalen Kongress mit Ausstellung f/u/ r Mess-und Automatisierungstechnik, Teil 2, VDI-Z 123 (1981) No. 1/2, Jan. (1/11), pp. 15-21.

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