Textiles: fiber preparation – Working – Carding
Patent
1984-05-02
1985-06-04
Rimrodt, Louis K.
Textiles: fiber preparation
Working
Carding
191457, 19240, 19300, D01G 1540
Patent
active
045205310
ABSTRACT:
An apparatus for making a web of fibers has an upright and horizontally elongated supply duct having an upper end, an open lower end, and a foraminous side wall. Fibers are fed to the upper end of the supply duct so that they descend in this duct as a ribbon-shaped web. An upright and horizontally elongated forming duct has an upper end receiving the fiber web from the supply duct, a lower end, and a foraminous side wall. Gas is made to flow down in the ducts and through the foraminous side walls thereof to shape the web and advance it to the respective lower ends. Rollers are provided at the lower end of the forming duct for withdrawing the web therefrom. One or more sensors measure the thickness of the web at a plurality of sensing locations spaced transversely along the web downstream of the lower end of the forming duct. Respective individually operable flow-adjusting means can vary the gas flow in one of the ducts at respective zones spaced transversely across the web like the sensing locations. A controller is connected between the detecting and adjusting units for varying the flow in accordance with the detected thickness.
REFERENCES:
patent: 3973291 (1976-08-01), Kolbach
patent: 4161052 (1979-07-01), Erben
patent: 4271565 (1981-06-01), Grunder
patent: 4280251 (1981-07-01), Ludwig
patent: 4394790 (1983-07-01), Keller et al.
patent: 4404710 (1983-09-01), Wood
patent: 4414710 (1983-11-01), Bolen
Dubno Herbert
Rimrodt Louis K.
Ross Karl F.
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