Delivery device with automatic threading system for weft storage drum

In a delivery device for traveling thread, for use on textile machines having a storage drum to which the thread is fed in a rearward region by means of a thread guide tube which revolves around the storage drum and from which the thread is withdrawn overhead through a thread withdrawal eye and wherein an automatic threading of the thread is effected by means of compressed air in a manner wherein the thread is first of all blown through the thread guide tube, deflected on a mouth side thereof parallel to an outer surface of the drum and conducted on an end side thereof below bristles of a displaceable brake ring which leaves a slot towards the outer surface of the drum, radially inwardly into a region of a tip of a drum-side head cone, said tip being directed towards a free cross section of the thread withdrawal eye, the latter being formed as an axial suction-blast nozzle, the improvement in the delivery device wherein

• said axial suction-blast nozzle constitutes means for effecting a radially inward deflection directed towards the thread withdrawal eye of an end of the thread flying free in a plane vertically above the thread withdrawal eye exclusively by a stream of suction air along an outer surface of the head cone,
• means for moving said brake ring forwardly away together with supplying said suction-blast nozzle with the compressed air,
• a compressed-air cylinder for moving the brake ring away, and
• spring means for return biasing the brake ring.

In a delivery device for traveling thread, for use on textile machines having a storage drum to which the thread is fed in a rearward region by means of a thread guide tube which revolves around the storage drum and from which the thread is withdrawn overhead through a thread withdrawal eye and wherein an automatic threading of the thread is effected by means of compressed air in a manner wherein the thread is first of all blown through the thread guide tube, deflected on a mouth side thereof parallel to an outer surface of the drum and conducted on an end side thereof below bristles of a displaceable brake ring which leaves a slot towards the outer surface of the drum, radially inwardly into a region of a tip of a drum-side head cone, said tip being directed towards a free cross section of the thread withdrawal eye, the latter being formed as an axial suction-blast nozzle, the improvement in the delivery device wherein

• said axial suction-blast nozzle constitutes means for effecting a radially inward deflection directed towards the thread withdrawal eye of an end of the thread flying free in a plane vertically above the thread withdrawal eye exclusively by a stream of suction air along an outer surface of the head cone,
• a displacement slide, and wherein
• said brake ring, which is to be brought into a slot position by a displacement in axial direction of the storage drum, is seated in an adjustable manner on said displacement slide,
• an upper jib supports said displacement slide, and
• a baffle wall is seated on said upper jib.

In a delivery device for traveling thread, for use on textile machines having a storage drum to which the thread is fed in a rearward region by means of a thread guide tube which revolves around the storage drum and from which the thread is withdrawn overhead through a thread withdrawal eye and wherein an automatic threading of the thread is effected by means of compressed air in a manner wherein the thread is first of all blown through the thread guide tube, deflected on a mouth side thereof parallel to an outer surface of the drum and conducted on an end side thereof below bristles of a displaceable brake ring which leaves a slot towards the outer surface of the drum, radially inwardly into a region of a tip of a drum-side head cone, said tip being directed towards a free cross section of the thread withdrawal eye, the latter being formed as an axial suction-blast nozzle, the improvement in the delivery device wherein

• said axial suction-blast nozzle constitutes means for effecting a radially inward deflection directed towards the thread withdrawal eye of an end of the thread flying free in a plane vertically above the thread withdrawal eye exclusively by a stream of suction air along an outer surface of the head cone,
• a displacement slide on which said brake ring is seated, and
• means comprising a set screw for adjusting the brake ring by the displacement slide, said set screw being accessible from a head end of the delivery device.

In a delivery device for traveling thread, for use on textile machines having a storage drum to which the thread is fed in a rearward region by means of a thread guide tube which revolves around the storage drum and from which the thread is withdrawn overhead through a thread withdrawal eye and wherein an automatic threading of the thread is effected by means of compressed air in a manner wherein the thread is first of all blown through the thread guide tube, deflected on a mouth side thereof parallel to an outer surface of the drum and conducted on an end side thereof below bristles of a displaceable brake ring which leaves a slot towards the outer surface of the drum, radially inwardly into a region of a tip of a drum-side head cone, said tip being directed towards a free cross section of the thread withdrawal eye, the latter being formed as an axial suction-blast nozzle, the improvement in the delivery device wherein

• said axial suction-blast nozzle constitutes means for effecting a radially inward deflection directed towards the thread withdrawal eye of an end of the thread flying free in a plane vertically above the thread withdrawal eye exclusively by a stream of suction air along an outer surface of the head cone,
• during the automatic threading of the thread, said revolvable thread guide tube has a mouth at said exit mouth side which is held positioned in said plane vertically above the thread withdrawal eye, said end of the thread emerging from said mouth during the automatic threading of the thread, and
• said outer surface of the drum continues from an edge thereof into said head cone meeting at an angle effecting a smooth deflection of said stream of suction air along said outer surfaces of the drum adjacent said edge and of the head cone, wherein gravity on the said thread and said stream of suction air along said outer surfaces adjust said thread to the outer surface of the head cone.