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US 5,687,558 AGranted
Fiber supply arrangement for open-end rotor spinning
AssigneeHans Stahlecker
InventorFritz Stahlecker
Life of this patent
Estimating the term…
Abstract
In the case of an open-end rotor spinning arrangement, in which the spinning rotor is arranged in a housing which is connected to a vacuum source, a fiber feeding duct is provided which extends from an opening roller to the area of a sliding surface which widens conically to form the fiber collecting surface of the spinning rotor. The smallest cross-section of the fiber feeding duct is situated at a distance from the mouth which is constructed as a slot, the height of which in the axial direction of the spinning rotor is much smaller than the ideal diameter of the smallest cross-section. The ideal diameter is defined as that diameter which corresponds to a circular area corresponding to the smallest cross-section.
Claims32
An open-end rotor spinning arrangement comprising:
- a rotor housing,
- a spinning rotor disposed in said rotor housing, said spinning rotor having an open end, a fiber collecting groove, a sliding surface which conically widens from adjacent the open end to the fiber collecting groove, and a closed bottom,
- a fiber feeding duct defining a fiber feeding path and extending between a fiber opening device and a fiber feeding mouth, said fiber feeding mouth opening towards the sliding surface, and
- a cover which has a projection which in use projects into the open end of the spinning rotor while leaving an overflow gap for transport air, said cover containing the fiber feeding mouth,
- wherein said fiber feeding duct exhibits a delivery cross-section which is a smallest cross-section of the fiber feeding duct, said delivery cross-section having an ideal diameter defined as the diameter of a circular area equivalent to the area of the delivery cross-section,
- wherein said mouth is a slot-shaped mouth extending in close proximity to the sliding surface and having a height in an axial direction of the spinning rotor which is smaller than said ideal diameter and a width in a circumferential direction of the spinning rotor which is significantly larger than said ideal diameter, said mouth having a mouth cross-sectional area at least the size of the delivery cross-section,
- and wherein said slot-shaped mouth is bounded on its axial side nearest the fiber collecting groove by a substantially radially extending fiber guiding surface which deflects travel path of substantially all fibers in a radially outward direction toward an initial fiber impact location on the sliding surface which is spaced from the collecting groove by at least 2/3 of the total axial length of the rotor from said open end of the rotor to said collecting groove, whereby stretching and parallelizing of said fibers on said sliding surface is facilitated.
4 more elements
An open-end rotor spinning arrangement comprising:
- a rotor housing,
- a spinning rotor disposed in said rotor housing, said spinning rotor having an open end, a fiber collecting groove, a sliding surface which conically widens from adjacent the open end to the fiber collecting groove, and a closed bottom,
- a fiber feeding duct defining a fiber feeding path and extending between a fiber opening device and a fiber feeding mouth, said fiber feeding mouth opening towards the sliding surface, and
- a cover which has a projection which in use projects into the open end of the spinning rotor while leaving an overflow gap for transport air, said cover containing the fiber feeding mouth,
- wherein said fiber feeding duct exhibits a delivery cross-section which is a smallest cross-section of the fiber feeding duct, said delivery cross-section having an ideal diameter defined as the diameter of a circular area equivalent to the area of the delivery cross-section,
- wherein said mouth is a slot-shaped mouth extending in close proximity to the sliding surface and having a height in an axial direction of the spinning rotor which is smaller than half said ideal diameter and a width in a circumferential direction of the spinning rotor which is significantly larger than said ideal diameter, said mouth having a mouth cross-sectional area at least the size of the delivery cross-section,
- and wherein said mouth is bounded on its axial side nearest the fiber collecting groove by a substantially radially extending fiber guiding surface which deflects a travel, path of substantially all fibers in a radially outward direction toward a location on the sliding surface which is a sufficient distance from the collecting groove to facilitate stretching and parallelizing of said fibers on said fiber guiding surface.
4 more elements
Dependencies are inferred from the claim text.