Back to results
US 4,202,163 AGranted
Spinning process and apparatus
AssigneeBarmag Barmer Maschinenfabrik AG
InventorsHerbert Turk, Herbert Schiminski, Erich Lenk
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeBarmag Barmer Maschinenfabrik AG
InventorsHerbert Turk, Herbert Schiminski, Erich Lenk
Estimating the term…
Process and apparatus for spinning fibers into a yarn in a yarn forming zone in the gap between air permeable surfaces of two rollers or on a single, air permeable roller surface while drawing a current of air adjacent said zone through said surface or surfaces by suction means, a feed channel with a narrow mouth adjacent the yarn forming zone for feeding an air stream and individual, separated fibers therein to the yarn forming zone from a carding roller rotating in a carding chamber to which a sliver or tow of fibers is fed, a casing about the rollers and the mouth of the channel with means for maintaining a desired subatmospheric to superatmospheric pressure in the casing and especially in the free flight interval of the fibers from the channel mouth to the yarn forming zone, a pressurizable casing about the carding unit and at least one air passage from the casing to the carding chamber, and using sequential, cascade-type, pressure decreases in the carding chamber, the feed channel, the free flight interval of the fibers at the yarn producing zone, and the suction means to attain optimum conditions for producing uniform and high strength yarns.
In a process for spinning fibers into a yarn by the steps of introducing a tow of fibers into a carding chamber having a rotating carding roller and discharging individual, separated fibers into a fiber feed channel, conveying the fibers in an airstream flowing through said channel and out of an elongated, narrow mouth of said channel extending parallel with and contiguous to a line of yarn formation in which said fibers are spun into a yarn on at least one air permeable surface moving substantially transversely to the line of yarn formation and through which air is drawn along the line of yarn formation by suction means, the improvement wherein an air pressure gradient is maintained so that the static air pressure decreases in cascade fashion such that
In an apparatus for spinning of individual fibers into a yarn along a line of yarn formation including hollow, air permeable, rotating roller means containing suction means into which a current of air is drawn to form said line of yarn formation extending longitudinally along the roller means, fiber feed channel means for conveying a stream of said fibers through a channel mouth extending along and adjacent to said line of yarn formation, the improvement comprising carding means to receive a tow of fibers and separate it into the individual fibers, said carding means embodying a rotatably driven carding roller with projections on its circumference in a carding chamber communicating with said channel for discharge of separated fibers into the channel, a pressurizable casing forming a substantially airtight chamber about said carding means, tow passage means extending through said casing for feed of a tow of entangled fibers to said carding means, seal means to seal the tow passage means substantially against leakage of pressurized air, and air passage means in said carding means for flow of pressurized air from said casing through said carding means into said channel.
Dependencies are inferred from the claim text.