Abstract: A method and apparatus for continuous fiber material treatment of a fiber column without compaction of the column. A liquid layer is disposed between upper and lower treatment zones (i.e. between a cook and wash zone), and apparatus is provided for interrupting the fiber column of the upper zone. The apparatus may include a conical table which generally supports the fiber column of the upper zone yet allows passage of fiber material from the upper zone to the lower zone to allow formation of another fiber column in the lower zone. The liquid layer area may be of the same or smaller cross-sectional area than the upper zone, and the lower zone may be horizontally offset from the upper zone if desired.