Apparatus for detwisting textile fabrics in rope form
OwnerMariano Bassaniinventor
Life of this patent
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Abstract
Apparatus for untwisting a textile length which has become gathered and twisted into rope-like form includes a rotatable guide through which the textile is passed in a manner such as to be constrained for rotation therewith. The guide is rotatable by a reversible drive. Twist detecting means comprising two mutually axially-displaceable rifled rollers, are arranged to control the drive such as to rotate the guide in a sense dependent on the detected sense of twisting of the textile. To avoid the need for conventional bearings in the mounting of the guide, opposite ends of the guide are provided with respective annular tracks engaged by respective groups of rollers rotatably carried on a support structure. One of the track-engaging rollers is driven from the drive to cause rotation of the guide.
Claims12
Improved apparatus for untwisting a textile length which has become gathered together and twisted into the form of a rope, said apparatus comprising:
- a main support structure,
- a mounting structure carried by the support structure and angularly adjustable in position relative thereto,
- a guide having a textile entry and a textile exit which together define a main axis of guiding for a textile passed through said guide,
- means for mounting said guide in said mounting structure for rotation about its guiding axis,
- at least one elongate element carried by the guide and arranged to engage a said textile length extending through the guide between said textile entry and exit;
- said elongate element being disposed transversely to and spaced from the guiding axis of the guide whereby to cause said textile length to follow a sinuous path therethrough,
- drive means carried by the mounting structure and arranged to rotate the guide selectively in one or other sense of rotation, and
- means for detecting twist in the rope-form textile length, said twist-detecting means being disposed downstream of the guide and being connected to control the operation of said drive means, the twist-detecting means including a pair of rifled rollers arranged for mutual axial displacement and between which the rope-form textile is arranged to pass, twisting in said textile being effective to cause a mutual displacement of the two rollers in a direction dependent on the sense of twisting;
- wherein the improvement comprises the provision of said guide mounting means in the form of
- respective annular tracks provided on said guide about said textile entry and exits, said tracks being coaxial with said guiding axis, and
- respective pluralities of rollers mounted on said mounting structure in correspondence with said tracks, the rollers of each said plurality being rotatable about respective axes parallel to said guiding axis, and being spaced circumferentially around the corresponding said track in contact therewith, one said roller serving as a drive roller and being drivingly coupled to said drive means.
Dependencies are inferred from the claim text.