Devices for picking-up, sucking and dragging textile filaments and yarns

Claim 1

A device for sucking and dragging the ends of textile filaments and yarns which are cut during movement at speeds of at least 1,000 meters/minute thereof to collecting and winding equipment, said device comprising a filament or yarn removal duct having a suction orifice at one end thereof; pressure means spaced from said suction orifice to create a subatmospheric pressure condition at said suction orifice; means guiding said filament or yarn in a direction substantially perpendicular to the axis of said suction orifice and adjacent thereto; a passage having a circular cross-section surrounding said filament or yarn and communicating with said suction orifice; a nozzle having a cross-section smaller than that of said suction orifice and coaxially aligned therewith, said nozzle being in communication with said passage at a position opposite said orifice, the ratio of the diameter of said nozzle to the diameter of said suction orifice being in the range of from 1:6 to 1:2, and means for imparting a superatmospheric pressure to said nozzle in order to push said filament or yarn into and within said suction orifice by means of a high speed pneumatic jet orthoganally incident on said filament or yarn, the speed of said pneumatic jet corresponding to the difference between said superatmospheric and subatmospheric pressures at said nozzle and said suction orifice, respectively; said passage being in communication with the atmosphere through a longitudinal slot having a width smaller than the cross-sectional diameter of said passage and lying in a plane including the axis of said filament or yarn and substantially perpendicular to the common axis of said nozzle and said suction orifice, said slot allowing the introduction therethrough into said passage of said filament or yarn within said passage and in front of both said nozzle and orifice; said passage having an axis intersecting said common axis of said nozzle and suction orifice and lying within the plane of symmetry of said slot.

Claim 2

A device for sucking and dragging the ends of textile filaments and yarns which are cut during movement at speeds of at least 1,000 meters/minute thereof to collecting and winding equipment, said device comprising a filament or yarn removal duct having a suction orifice at one end thereof; pressure means spaced from said suction orifice to create a subatmospheric pressure condition at said suction orifice; means guiding said filament or yarn in a direction substantially perpendicular to the axis of said suction orifice and adjacent thereto; a passage having a circular cross-section surrounding said filament or yarn and communicating with said suction orifice; a nozzle having a cross-section smaller than that of said suction orifice and coaxially aligned therewith, said nozzle being in communication with said passage at a position opposite said orifice, the ratio of the diameter of said nozzle to the diameter of said suction orifice being in the range of from 1:6 to 1:2, and means for imparting a superatmospheric pressure to said nozzle in order to push said filament or yarn into and within said suction orifice by means of a high speed pneumatic jet orthoganally incident on said filament or yarn, the speed of said pneumatic jet corresponding to the difference between said superatmospheric and subatmospheric pressures at said nozzle and said suction orifice, respectively; said passage being in communication with the atmosphere through a longitudinal slot having a width smaller than the cross-sectional diameter of said passage and lying in a plane including the axis of said filament or yarn and substantially perpendicular to the common axis of said nozzle and said suction orifice, said slot allowing the introduction therethrough into said passage of said filament or yarn within said passage and in front of both said nozzle and orifice; said passage having an axis intersecting said common axis of said nozzle and suction orifice and lying within the plane of symmetry of said slot.