around the tank to exit at an outlet weir 41 into side vessel 10 within the side vessel 10 there is preferably a means to filter the fiber from the processing liquid before it is recirculated to the tank 4 or directed to a drain guide roller 22 is situated at the lower end of the guide and tension roller assembly 16 in addition the surface of guide roller 22 is studded with a plurality of short projections or nodules 24 which press into the back of the carpet as it passes around guide roller 22 thereby causing the pile fibers to lift outward and separate when the assembly 16 is fully inserted into the tank 4 guide roller 22 also cooperates with the contoured inner wall 21 lowering of this assembly 16 into the tank 4 pushes the carpet down into the processing liquid and into a position to be acted upon by rollers 17 and 18 tension rollers 25 are extendable by a drive and link means 26 to an outer position 40 where they press against the backside of the carpet to urge the pile side into contact with the manipulation rollers 17 and 18 the positioning of the tension rollers 25 is such that they are located vertically between the upper rollers 17 and lower rollers 18 the guide and tension roller assembly 16 is shown in greater detail in fig3 and 4 specifically the guide and tension roller assembly comprises the guide roller 22 and tension rollers.