Crabbing and decatising machines

A continuous crabbing by overheated water without rubber belt (Fig. 5-27) gives permanent effect with brighter appearance. The notable improvement of the fabric quality is due to the calendering effect in water at 110 C. There is no need for use of expensive rubber belts. Fig. 5-28 shows a continuous multiset crabbing machine. 

The kier decatising (Fig. 5-29) of wool fabrics is also a process for permanently setting wool fabrics. In this way wool fabrics are given surface stability without 

Water-tight main compartment 2, Barometric columns 3, Main drum 4. Presssing roller 5. Pair of pressing roller 6. Cooling tank 7. Device to arrange fabrics in laps. 

The evaluation of the decatising effect is commonly based on subjective estimates. The handle, the glaze, the brightness of the colours, the bulkiness or hardness of the fabric are obtained from the decatising machines, the flow diagrams of which are shown in Figs. 5.31, 5.32 and 5.33. Therefore, it is required from the decatising machines that may have a wide and effective versatility. 

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