Importance

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Abstract

Apparatus and method for removing real or false twist from a moving fabric in rope form. Freely rotatable, diagonally opposite elements are located on opposite sides of an fabric path of travel. Each element has a helically wound fabric contact member therearound with the helix direction of the diagonally opposite elements being the same. Fabric passing between the elements and engaging the contact members of the elements imparts rotation to the elements while the contact members impart rotation to the fabric for twist removal. A twist direction detector is located downstream of the elements to detect any remaining twist in the fabric, and a twist measurement sensor is located downstream of the twist detector to determine the amount of any remaining twist. The twist detector and twist measurement sensor are operatively associated with the elements such that relative position between the elements and the fabric may be controlled for greater or lesser twist removal, dependent upon output from the detector and sensor. Fabric being processed may be located on a rotatable turntable which may also be controlled by output from the detector and the sensor. In a preferred embodiment, a rotatably adjustable support is provided with two pairs of rolls mounted thereon for free rotation. Each pair of rolls define an acute angle therebetween and the fabric contact members on the rolls of each pair follow oppositely directed helices.

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First Claim