Open-end friction spinning machine
AssigneesFritz Stahlecker, Hans Stahlecker
InventorFritz Stahlecker
Life of this patent
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Abstract
An open-end friction spinning machine is provided having a plurality of spinning units arranged next to one another. A suction device assigned to each spinning unit which acts in the area of the yarn formation zone may be selectively switched off such as in the case of a yarn breakage. So that the air throughput balance does not change in the area of the other spinning units when the suction device of a single unit is switched off, devices are provided for maintaining the air throughput relatively constant. Air throughput normally used by the suction devices in the yarn forming area of the spinning unit is diverted, for cleaning and maintenance purposes.
Claims32
An open-end friction spinning apparatus having a plurality of spinning units, each said spinning unit having drivable friction surface means defining a yarn formation zone, and suction device means for holding a forming yarn in said yarn formation zone, each said suction device means being connected to a joint vacuum supply system by connecting line means, comprising:
- blocking means for blocking the connecting line means,
- throughput control means for maintaining a substantially constant air throughput in said joint vacuum supply system when said blocking means are engaged, said throughput control means comprising auxiliary suction device means at the spinning units which are selectively connectable with the vacuum supply system instead of said suction device means when the connecting line means are blocked for a respective spinning unit, said auxiliary suction device means including means for applying a load on the joint vacuum supply system which is substantially equivalent to the load applied by the suction device at the respective spinning unit, and
- yarn breakage monitoring means for monitoring yarn breakages and controlling said blocking means and said throughput control means in response to yarn breakage conditions at respective spinning units.
An open-end friction spinning apparatus having a plurality of spinning units, each said spinning unit having drivable friction surface means defining a yarn formation zone, and suction device means for holding a forming yarn in said yarn formation zone, each said suction device means being connected to a joint vacuum supply system by connecting line means, comprising:
- blocking means for blocking the connecting line means;
- throughput control means for maintaining a substantially constant air throughput in said joint vacuum supply system when said blocking means are engaged;
- wherein said throughput control means comprises auxiliary suction device means, said auxiliary suction device means being selectively connectable with said joint vacuum supply system, said auxiliary suction device means being capable of maintaining substantially the same air throughput as said suction device means;
- wherein said auxiliary suction device means comprises at least one inlet air opening means;
- and
- further including opening device means for opening up a sliver, and duct means connectable with said inlet air opening means, said duct means being engageable with said feeding and opening device means.
An open-end friction spinning apparatus having a plurality of spinning units, each said spinning unit having drivable friction surface means defining a yarn formation zone, and suction device means for holding a forming yarn in said yarn formation zone, each said suction device means being connected to a joint vacuum supply system by connecting line means, comprising:
- blocking means for blocking the connecting line means;
- and
- throughput control means for maintaining a substantially constant air throughput in said joint vacuum supply system when said blocking means are engaged;
- wherein said throughput control means comprises auxiliary suction device means, said auxiliary suction device means being selectively connectable with said joint vacuum supply system, said auxiliary suction device means being capable of maintaining substantially the same air throughput as said suction device means;
- further including connecting means for connecting said auxiliary suction device means with said vacuum supply system, said blocking means and said connecting means being capable of being disposed in a position whereby both said suction device means and said auxiliary suction device means are in communication with said vacuum supply system at the same time.
Dependencies are inferred from the claim text.