초록 ▼

Method and apparatus for splicing two textile yarn ends by untwisting the end portions of each to form a spread beard thereof, interpenetrating or intertwining the beards at both ends, and letting the twist accumulated at both ends progress towards the two mutually interwined or interpenetrated bear

Method and apparatus for splicing two textile yarn ends by untwisting the end portions of each to form a spread beard thereof, interpenetrating or intertwining the beards at both ends, and letting the twist accumulated at both ends progress towards the two mutually interwined or interpenetrated beards. In the method, the untwisted end portions of both yarns are subjected to an axial traction force to set the beards of both yarn ends free and to separate and set the beard fibers substantially parallel with one another, while the beard bases are secured to retain the individual torsion or twist of the fibers, with the beards then being moved laterally to arrange the same adjacent to one another at zones of the beard bases, while the beards are simultaneously slided in longitudinal relative movement to one another. In the apparatus according to the invention, yarn holding nips are axially movable, while beard support members have two complementary surfaces are movable about rotation axes and along paths from outer positions regarding the yarns, to positions in which the complementary surfaces are mutually adjacent. The apparatus comprises as well, holding members for the ends of the beards retained by the revolving nips, to preserve the twist thereof. In a pneumatic embodiment, the twisting and untwisting of the yarn is accomplished by pneumatic chambers of substantially circular cross-section, and with a longitudinal gap for placing the yarn therein, along with a pair of tangentially-communicating ducts entering the chamber at diametrically opposed positions so that pressurized air injected alternately and in opposite directions through these ducts and into the chamber, generate within the chamber a swirl that causes the coaxially-arranged yarn therein to revolve in one direction for being twisted and in the opposite direction for becoming untwisted.

대표청구항 ▼

Apparatus for splicing two textile yarns, comprising a pair of retaining nips for retaining ends of the respective yarns in substantially stationary position, said nips each being movably mounted for movement along a substantially axial direction of the retained yarns, a pair of revolving nips for r

Apparatus for splicing two textile yarns, comprising a pair of retaining nips for retaining ends of the respective yarns in substantially stationary position, said nips each being movably mounted for movement along a substantially axial direction of the retained yarns, a pair of revolving nips for receiving the respective yarns, winding the respective yarns thereabout, and untwisting the same to form beards, a pair of support members, for supporting the respective beards of the yarns, said support members having complementary surfaces and being movably mounted about respective centers of rotation thereof for movement between respective inner and outer positions, said complementary surfaces being adjacent one another at said inner positions thereof, and a pair of holding members for holding ends of the beards retained by said respective revolving nips to maintain the beards in substantially stationary position and preserve twist of individual untwisted fibers of the respective beards.