Devices for producing a continuous thread from a roving composed of parallel short fibers
AssigneeInteraction
InventorJean-Jacques Walter
Life of this patent
Estimating the term…
Abstract
A roving of short fibers is converted to a continuous twisted thread by a device which grips the roving between the facing teeth of two endless belts, and an acoustically generated transverse air jet is directed at the side of the roving, at a fixed point situated between the two belts. The direction of the air jet is reversed each time the fixed point is passed either a pair of facing teeth, or the midpoint in the gap between two successive pairs of facing teeth.
Claims10
Apparatus for producing a continuous thread from a roving supplied at a preselected delivery speed, said apparatus comprising:
- two endless toothed belts arranged with facing run sections and the teeth on one aligned with those on the other hand along said facing run sections, the teeth on each said belt spaced apart by a distance approximately equal to the average length of the fibers of said roving;
- means for passing an air current transverse to said roving at a fixed point between said facing run sections;
- and
- means for reversing the direction of said air current when said fixed point is passed by a pair of aligned teeth.
Apparatus for producing a continuous thread from a roving supplied at a preselected delivery speed, said apparatus comprising:
- two endless toothed belts arranged with facing run sections and the teeth on one aligned with those on the other along said facing run sections, the teeth on each said belt spaced apart by a distance approximately equal to the average length of the fibers of said roving;
- means for passing an air current transverse to said roving at a fixed point between said facing run sections;
- and
- means for reversing the direction of said air current when said fixed point is passed by a point between successive pairs of aligned teeth and equidistant therefrom.
Dependencies are inferred from the claim text.