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AssigneeSchubert & Salzer Maschinenfabrik Aktiengesellschaft
InventorsErwin Braun, Eberhard Grimm
Estimating the term…
In an open-end spinning device with a spinning rotor a compressed air conduit is provided for directing an air current upon the inner surface of the spinning rotor. This compressed air conduit is connected through a stop valve to a source of compressed air. The compressed air conduit is provided with a pressure control device which can be pre-set to at least two pressure levels. The pressure control device has parallel conduits of which one conduit is provided with a pressure reduction device for the low pressure. During the preparation of the piecing operation, compressed air, at high pressure, is fed into the spinning rotor to clean said spinning rotor. Subsequently, but before the start of fiber feeding into the spinning rotor, the compressed air is reduced to a lower pressure value and is finally switched off before the yarn is fed back into the spinning rotor. The invention includes the process for restarting the open-end spinning device. Both the process and the device may be manually or automatically operated.
An open-end spinning machine, having a plurality of open-end spinning devices, each of which has an open-end spinning rotor and means to clean the inner surface of said rotor with a compressed air current when said device stops for piecing a broken end, said cleaning means having a cleaning conduit for directing said current of compressed air onto the inner surface of said rotor, said conduit being connected to a pressurized source of air and to pressure control means for alternating the pressure of the air in said cleaning conduit, said pressurized source comprising:
A process for restarting an open-end spinning device having at least one open-end spinning rotor whose yarn end is broken, comprising the following steps:
An open-end spinning machine, having a plurality of open-end spinning devices, each of which devices has an open-end rotor and means for cleaning the inner surface of said rotor when said spinning device stops for piecing a broken end, said cleaning means having a cleaning conduit for directing a current of compressed air onto the inner surface of said rotor, said cleaning conduit being connected to a pressurized air source, and pressure control means between the pressurized air source and said cleaning conduit for alternating the pressure of said compressed air current from low to high pressure, comprising:
Dependencies are inferred from the claim text.