Method and apparatus for depositing yarn
AssigneeBarmag Barmer Maschinenfabrik AG
InventorHeinz Schippers
Life of this patent
Estimating the term…
Abstract
A method and apparatus for depositing yarn in the form of free-falling helical windings reshaped into an elongated, closed curve configuration and laid into a spinning can with a traversing movement so that one end of the closed curve remains on the inner wall of the cam while the other end is moved back and forth in an annular zone between the inner wall of the can and its center. The resulting yarn deposit is very uniform over the can cross section and the collected yarn has improved run-off properties.
Claims10
A method for depositing a continuously forwarded yarn into a round, rotating spinning can wherein the yarn is conducted in its axial direction through a guide channel having an outlet guide which orbits in a substantially horizontal circular path at about the linear velocity of the yarn and wherein the yarn is subsequently permitted to fall freely in helically shaped windings onto the circular collecting plane of said spinning can, the improvement which comprises:
- shaping the yarn windings before their impingement onto said collecting plane by means of axially extending shaping surfaces placed in contact with the yarn windings so that each winding defines, in its projection onto said collecting plane of the spinning can, an elongated, closed curve with rounded ends;
- and
- moving the windings, as a whole, horizontally with reference to said collecting plane such that said closed curve defined by each winding is always disposed with one end on the outer circumference of said collecting plane of the rotating spinning can and with the other end being moved back and forth in an annular zone between the outer circumference of the collecting plane of the spinning can and its center.
In apparatus for depositing a continuously forwarded yarn into a round, rotating spinning can including a rotor which contains a yarn guide channel with an outlet guide means orbiting in a substantially horizontal circular path about a substantially vertical axis of rotation, said spinning can being positioned below the outlet guide means to receive the yarn windings freely falling from said outlet guide means, the improvement comprising:
- a carrier member for rotatably mounting said rotor about said vertical axis of rotation with means to swivel said carrier member back and forth in a substantially horizontal plane about a vertical pivot axis offset from said axis of rotation;
- cage means float mounted on a shaft of said rotor and having axially projecting shaping elements extending below said carrier member in positions to receive the yarn windings and form them into an elongated, closed curve as projected onto the collecting plane of said spinning can;
- and
- means to restrain said cage means from rotating about said vertical axis of rotation.
Dependencies are inferred from the claim text.