Claims
- 1. An open-end spinning apparatus for spinning thread from fiber, comprising:
- (a) an opening cylinder having clothing disposed about its periphery disposed in an opening cylinder housing;
- (b) a feeding apparatus disposed upstream of said opening cylinder for feeding a tuft of sliver to said cylinder;
- (c) a fiber collection surface disposed downstream from said cylinder for receiving fibers from said cylinder;
- (d) an underpressure source associated with said fiber collection surface;
- (e) a fiber feeding channel connecting said fiber collection surface to said opening cylinder for guiding fibers from said opening cylinder to said fiber collection surface;
- (f) a piecing apparatus for piecing up broken ends of said thread associated with said open-end spinning apparatus;
- (g) a depth penetration apparatus for controlling the depth said tuft of said sliver penetrates into said clothing; and
- (h) control means operably configured with said depth penetration apparatus to coordinate the depth of said sliver tuft into said clothing during piecing, said depth control apparatus controllable in a first depth control configuration to maintain said sliver tuft at a first predetermined depth into said clothing, and controllable in a second depth control configuration to withdraw said fiber tuft from said first depth to a second predetermined depth which is less than said first predetermined depth, said control means further comprising timing means configured with said depth penetration apparatus to coordinate switching between said first depth control configuration and said second depth control configuration so that said fiber tuft is withdrawn to said second depth as fibers are simultaneously introduced to said fiber collection surface for piecing so that temporarily fewer fibers reach said fiber collection surface during piecing.
- 2. An open-end spinning apparatus as set forth in claim 1, wherein said depth penetration apparatus comprises an overpressure source which is controlled by said control means and which opens in the area of said tuft in said opening cylinder housing.
- 3. An open-end spinning apparatus as set forth in claim 2, wherein said overpressure source comprises a pneumatic source connected to the interior of said opening cylinder and said opening cylinder has a perforated outer surface.
- 4. An open-end spinning apparatus as set forth in claim 2, wherein a pneumatic source opens into a feed trough which comprises part of said feeding apparatus and directs pneumatic currents substantially radially with respect to said opening cylinder.
- 5. An open-end spinning apparatus as set forth in claim 1, wherein said depth penetration apparatus comprises a second underpressure source which is controlled by said control means and which is effective in said opening cylinder housing.
- 6. An open-end spinning apparatus as set forth in claim 5, wherein said second underpressure source is associated with said underpressure source for said fiber collection surface to control the depth penetration of said tuft in an overlapping manner.
- 7. An open-end spinning apparatus as set forth in claim 5, wherein said depth penetration apparatus is effective in the fiber transport path between said feeding apparatus and said fiber collection surface.
- 8. An open-end spinning apparatus as set forth in claim 7, wherein said second underpressure source is connectable to a suction-air opening in the peripheral wall of said opening cylinder housing.
- 9. An open-end spinning apparatus as set forth in claim 8, wherein said suction air opening is arranged in the longitudinal region of said tuft.
- 10. An open-end spinning apparatus as set forth in claim 9, wherein said suction-air opening is covered by a screen.
- 11. An open-end spinning apparatus as set forth in claim 8 wherein a fiber collection receptacle is disposed between said suction-air opening and said second underpressure source.
- 12. An open-end spinning apparatus as set forth in claim 8, wherein means are provided for connecting said suction-air opening to said second underpressure source and an overpressure source selectively.
- 13. An open-end spinning apparatus as set forth in claim 1, wherein said control means is disposed on a maintenance apparatus which moves alongside a plurality of open-end spinning apparatus.
- 14. An open-end spinning apparatus as set forth in claim 1, wherein said depth penetration apparatus comprises an adjustment apparatus for said feeding apparatus.
- 15. An open-end spinning apparatus as set forth in claim 1, wherein said depth penetration apparatus comprises an adjustable baffle disposed in the region of said tuft.
- 16. An open-end spinning apparatus as set forth in claim 1, further comprising apparatus for determining the state of said tuft at the beginning of the piecing and connected to said control means.
- 17. An open-end spinning apparatus as set forth in claim 16, wherein said apparatus for determining the state of said tuft is connected by said control means to said depth penetration apparatus.
Priority Claims (1)
Number |
Date |
Country |
Kind |
41 06 556.5 |
Mar 1991 |
DEX |
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Parent Case Info
This is a continuation of application U.S. Ser. No. 07/923,792, filed Aug. 26, 1992, which was abandoned upon the filling hereof.
US Referenced Citations (24)
Foreign Referenced Citations (3)
Number |
Date |
Country |
42906 |
Jan 1982 |
EPX |
3516120 |
Nov 1986 |
DEX |
71433 |
Apr 1984 |
JPX |
Continuations (1)
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Number |
Date |
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Parent |
923792 |
Aug 1992 |
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