Twisting apparatus
AssigneeCommonwealth Scientific and Industrial Research Organisation
InventorsDavid Graham Phillips, Keith Alan Thomas
Life of this patent
Estimating the term…
Abstract
Apparatus for twisting a travelling strand includes a rotary structure rotatable about a rotational axis X--X and a series of pulleys mounted on the structure in an array disposed about the rotational axis X--X with each pulley in the series mounted on the structure for rotation about an individual axis of pulley rotation which is generally parallel to the axis X--X and moves around that axis on rotation of the structure. An input strand guide pulley guides an input strand to be twisted onto a path in which it will successively engage the pulleys and a strand exit guide pulley guides the strand from that path into an exit path along the axis X--X. The rotary structure is driven through a drive shaft and the pulleys are rotated by gearing.
Claims10
Apparatus for stretching a travelling assembly of staple fibres, comprising:
- a pair of spaced apart twist blocks through which to pass a travelling assembly of staple fibres to be stretched;
- a first twisting device located between said twist blocks and comprising a first rotary structure rotatable about a first rotational axis, a first plurality of pulleys mounted on the first rotary structure in an array disposed about the first rotational axis with each pulley in the first array rotatably mounted on the first rotary structure for rotation about an individual axis of pulley rotation which is generally parallel to said first rotational axis and moves around said rotational axis on rotation of the first rotary structure, a first input guide means to guide the travelling assembly into a path in which it will successively engage the pulleys of said first array, and first exit guide means to guide said travelling assembly from said path into an exit path from the first twisting device;
- a second twisting device located between the twist blocks to receive the travelling assembly after it exits the first twisting device and comprising a second rotary structure rotatable about a second rotational axis, a second plurality of pulleys mounted on the second rotary structure in an array disposed about the second rotational axis with each pulley in the second array rotatably mounted on the second rotary structure for rotation about an individual axis of pulley rotation which is generally parallel to said second rotational axis and moves around said second rotational axis on rotation of the second rotary structure, second input guide means to guide the travelling assembly entering the second twisting device into a path in which it will successively engage the pulleys of said second array, and second exit guide means to guide the travelling assembly from said path into an exit path from the second twisting device;
- first drive means operable to rotate said first rotary structure about the first rotational axis and also to rotate the pulleys of said first array about their respective pulley axes;
- and
- second drive means operable to rotate said first second rotary structure about said second rotational axis and also to rotate the pulleys of the second array about their respective pulley axes at greater peripheral speed than the pulleys of the first array thereby to stretch the travelling assembly of fibres as it passe between the first and second twisting devices.
Dependencies are inferred from the claim text.