Thread pull-off aid of variable geometrical configuration for the overhead drawing-off of a thread from a creel bobbin
AssigneePalitex Project Company GmbH
InventorUlrich Lossa
Life of this patent
Estimating the term…
Abstract
A pull-off aid of variable geometrical configuration for the overhead drawing-off of a thread (a,a') to be would onto a bobbin (1) from a feed or creel bobbin (11) mounted on a bobbin carrier, has an outer diameter which is variable by a control pulse which is dependent upon the increasing diameter of the bobbin (1) being wound and thereby upon the decreasing diameter of the feed or creel bobbin from which the thread is being drawn. To this end, a diameter sensor (2), by which the control pulse is initiated, responds when the bobbin being wound has reached a predetermined diameter.
Claims8
A thread pull-off aid mechanism for use in a thread processing machine, in which thread is drawn overhead from at least one feed bobbin to be wound onto a winding bobbin, to prevent the thread being pulled off the feed bobbin from rubbing against or interfering with the outer windings of thread remaining on the feed bobbin, said thread pull-off aid mechanism comprising:
- means of variable geometrical configuration adapted to be positioned in the thread processing machine at a position for contacting and guiding the thread being pulled off the feed bobbin away from the outer windings of thread remaining on the feed bobbin and for varying its geometrical configuration in relation to the diameter of the feed bobbin;
- and
- means associated with said thread contacting and guide means for controlling the variation of the geometrical configuration thereof including means for sensing the diameter of the winding bobbin, which increases as the diameter of the feed bobbin decreases, and for producing a control signal.
A spindle assembly of two-for-one twister thread processing machine having means for carrying at least one feed bobbin of thread, means for drawing off the thread overhead from the feed bobbin, and means for winding the processed thread on a winding bobbin;
- the combination therewith of a thread pull-off aid mechanism for preventing the thread being pulled off the feed bobbin from rubbing against or interfering with the outer windings of thread remaining on the feed bobbin, said thread pull-off aid mechanism comprising:
- means of variable geometrical configuration mounted in said spindle assembly of said thread processing machine at a position for contacting and guiding the thread being pulled off the feed bobbin away from the outer windings of thread remaining on the feed bobbin and for varying its geometrical configuration in relation to the diameter of the feed bobbin;
- and
- means associated with said thread contacting and guide means for controlling the variation of the geometrical configuration thereof including means for sensing the diameter of the winding bobbin, which increases as the diameter of the feed bobbin decreases, and for producing a control signal.
Dependencies are inferred from the claim text.