Abstract: Apparatus and method for high pressure sizing, including sizing squeeze apparatus which effectively utilizes high pressure squeeze loading to remove excess sizing from the warp yarns, and thus to reduce the water evaporation requirement of the yarn. The high pressure sizing squeeze apparatus includes positive drive of the rubber-surface roll as well as the steel roll to prevent slippage which could strain the warp, and maintains a substantially invariant squeeze loading irrespective of variable tension in the roll drive. The surface speed of the rubber-covered squeeze roll may be slightly less than the surface speed of the steel roll, to reduce the torque required to drive the rubber-covered roll at relatively high squeeze pressures where substantial slippage is encountered. A torque limiter controls maximum axial drive torque supplied to the rubber-surface roll, in response to the magnitude of squeeze loading.

Abstract: Controlled tension letoff apparatus for unwinding rolls of material includes a constant tension dancer roll operatively associated with the material being unwound, and a plurality of air pressure regulators, some of which emit variable control signals in response to the movement of the dancer roll and the tension sensed thereby while one of such regulators emits a constant control signal. The signals are fed into a computing air pressure relay, the output of which, in turn, impressed upon brake actuators associated with the material beam braking systems and in this manner, the braking level of the letoff beams is suitably controlled, so as to maintain constant the tension level of the material, in accordance with the movement of the dancer roll and the tension sensed thereby during the various operational modes of the system.