Claims
- 1. Open-end spinning apparatus comprising:
- a tangential belt for driving a plurality of spinning rotor shafts,
- a pressure applying device for pressing the tangential belt with a pressure force against the respective rotor shafts during normal spinning operations,
- a rotor shaft brake for applying braking forces to respective ones of the rotor shafts,
- a brake actuating device for actuating the brake to apply braking forces to a respective rotor shaft while decreasing the pressure force applied by the pressure applying device on the tangential belt against the respective rotor shaft during braking of the respective rotor shaft to accommodate a subsequent piecing operation,
- and a supplementary actuating device, in addition to the pressure applying device for temporarily increasing the pressure force applied by the pressure applying device on the tangential belt to a level above the pressure force applied to the respective rotor shaft during normal spinning operations so as to provide for acceleration of the respective rotor shaft during piecing operations.
- 2. Apparatus according to claim 1, wherein a plurality of spinning units with respective rotor shafts are driven by the tangential belt means, and wherein each spinning unit includes pressure applying means, rotor shaft brake means, brake actuating means, and supplementary actuating means.
- 3. Apparatus according to claim 2, further comprising a mobile servicing unit which includes means for selectively actuating the brake actuating means and supplementary actuating means at respective ones of said spinning units, thereby facilitating piecing operations.
- 4. Apparatus according to claim 3, wherein the pressure applying means is a pressure roller.
- 5. Apparatus according to claim 4, wherein the supplementary actuating means comprises an intermediate member which permits an application movement of the pressure applying means without any adjusting of the brake means.
- 6. Apparatus according to claim 4, wherein the supplementary actuating means includes an actuating lever for the pressure applying means which is arranged on a common shaft next to a brake lever of the brake means and is aligned in parallel to this brake lever.
- 7. Apparatus according to claim 4, wherein the actuating lever is connected with the pressure applying means without any play.
- 8. Apparatus according to claim 1, wherein the supplementary actuating means comprises an intermediate member which permits an application movement of the pressure applying means without any adjusting of the brake means.
- 9. Apparatus according to claim 8, wherein the pressure applying means is a pressure roller.
- 10. Apparatus according to claim 1, wherein the supplementary actuating means includes an actuating lever for the pressure applying means which is arranged on a common shaft next to a brake lever of the brake means and is aligned in parallel to this brake lever.
- 11. Apparatus according to claim 10, wherein the actuating lever is connected with the pressure applying means without any play.
- 12. Apparatus according to claim 10, wherein the pressure applying means is a pressure roller.
- 13. Apparatus according to claim 1, wherein the pressure applying means is a pressure roller.
- 14. Open-end spinning apparatus comprising:
- a tangential belt for driving a plurality of spinning rotor shafts,
- a pressure applicator for pressing the tangential belt with a pressure force against the respective rotor shafts during normal spinning operations,
- and a supplemental pressure applicator, in addition to the pressure applicator, for temporarily increasing the pressure force applied by the pressure applicator on the tangential belt to a level above the pressure force applied to the respective rotor shaft during normal spinning operations so as to shorten the acceleration time of the respective rotor shaft during a piecing operation when the respective rotor shaft is accelerated from a standstill to its spinning speed.
- 15. Apparatus according to claim 14, wherein said pressure applicator includes a pressure roller engageable with the tangential belt.
- 16. Apparatus according to claim 15, wherein said pressure applicator includes a lever acting on the pressure roller and a spring acting on the lever.
- 17. Apparatus according to claim 16, wherein said supplementary pressure applicator includes a second lever connected to the first lever.
- 18. A method for open-end spinning comprising:
- driving a plurality of spinning rotor shafts with a tangential belt with pressing of the tangential belt with a pressure force against the respective rotor shafts during normal spinning operations,
- and temporarily increasing the pressure force applied on the tangential belt to a level above the pressure force applied at a respective rotor shafts during normal spinning operations so as to shorten the acceleration time of the respective rotor shaft during a piecing operation when the respective rotor shaft is accelerated from a standstill to its spinning speed.
- 19. A method according to claim 18, wherein said pressing of the tangential belt comprises pressing a pressure roller against the tangential belt.
- 20. A method according to claim 19, wherein said pressing of the tangential belt includes spring biasing a first lever carrying the pressure roller, and wherein said temporarily increasing the pressure force includes forcibly moving a second lever connected to the first lever.
Priority Claims (1)
Number |
Date |
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3942402 |
Dec 1989 |
DEX |
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Parent Case Info
This is a continuation of application Ser. No. 07/626,431, filed Dec. 12, 1990 abandoned.
US Referenced Citations (12)
Foreign Referenced Citations (3)
Number |
Date |
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2803052 |
Jul 1979 |
DEX |
3401315 |
Jul 1985 |
DEX |
3613843 |
Oct 1987 |
DEX |
Continuations (1)
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Number |
Date |
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Parent |
626431 |
Dec 1990 |
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