Method for transfer of a fiber roving from a completed bobbin package to an empty tube on a spinning preparatory machine
AssigneeRieter Machine Works, Ltd.
InventorPeter Novak
Life of this patent
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Abstract
Prior to doffing a bobbin package, the roving is severed to form a beard which is located adjacent a stop on the spindle. After the bobbin package is doffed, the beard is located adjacent to an axial stop on the spindle. When a fresh tube is donned, the roving beard is brushed down by the tube and clamped by the bottom of the tube against the axial stop. A new package can then be wound while the roving beard remains clamped.
Claims10
A method of transferring a fiber roving from a completed bobbin package to an empty tube on a spinning preparatory machine having a spindle, a flyer coaxial of the spindle and a winding device, said method comprising the steps of
- stopping the spindle supporting the bobbin package and the flyer in a position with the winding device located within the winding lift of the last winding of a roving on the bobbin package;
- severing the roving between the bobbin package and the winding device to form a roving beard outside the winding device;
- thereafter displacing the winding device relative to the bobbin package into an end position with the roving beard located in the immediate vicinity of the bottom part of the bobbin tube of the bobbin package;
- doffing the bobbin package from the spindle in a vertical direction;
- and
- donning an empty tube onto the spindle in a vertical direction while brushing the roving beard downwardly to clamp the roving beard between the tube and the spindle.
Dependencies are inferred from the claim text.