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US 4,391,089 AGranted
Apparatus for piecing-up a wrap yarn
AssigneeSchubert & Salzer
InventorsWerner Billner, Erich Bock
Life of this patent
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AssigneeSchubert & Salzer
InventorsWerner Billner, Erich Bock
Estimating the term…
An apparatus for aiding in piecing-up wrapped yarn on a yarn wrapping device which includes a hollow spindle upon which a bobbin of wrapping thread is carried. A pair of delivery rolls feeds a fiber bundle F through a fiber feed channel 8 provided in a pot carried on top of a housing which encloses the hollow spindle and bobbin. Holes 73 are provided in the downwardly extending projections of the pot so that in normal operation air flows through the housing and out of the holes 73. However, upon piecing-up of the yarn, the pot is depressed closing the holes 73 and 61 allowing the air flow to flow at its maximum through the feed channel out of a suction duct 9. This increased suction through suction duct 9 causes the fiber bundle F, the wrapping yarn B, and wrapped yarn G to be sucked thereinto for being pieced-up.
Apparatus for piecing-up a wrap yarn being produced from a bundle of spinning fibers and a wrapping thread on a wrapping device, a hollow spindle forming part of said wrapping device, a bobbin of said wrapping thread carried on said hollow spindle, a pair of delivery rolls for feeding said bundle of spinning fibers to said hollow spindle and a pair of takeup rolls for drawing off said wrap yarn out of said hollow spindle, a housing concentrically surrounding said bobbin, a jacket forming part of said housing having openings for the passage of air, and a suction duct arranged between said pair of delivery rolls and said hollow spindle comprising:
A method for piecing-up a wrap yarn being produced from a bundle of spinning fibers and a wrapping thread by means of a wrapping device comprising a hollow spindle carrying a bobbin of said wrapping thread and arranged between a pair of delivery rolls for feeding said bundle of spinning fibers to said hollow spindle and a pair of take-off rolls for drawing off said wrap yarn out of the hollow spindle, a housing concentrically surrounding said bobbin, a jacket forming part of said housing having openings for the passage of air, and a suction duct arranged between said pair of delivery rolls and said hollow spindle, comprising the following steps:
Dependencies are inferred from the claim text.