Drafting unit for a ring spinning device with two delivery rollers defining a delivery nip therebetween for a roving
US5617714A · kind A · utility
Inventor
Key dates
| Filing date | Jan 19, 1996 |
| Grant date | Apr 8, 1997 |
| Priority date | — |
| Expiry date | Jan 19, 2016 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD01H5/72
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A drafting unit for a ring spinning device is described for use on a ring spinning device, comprising two delivery rollers (1, 2) defining between them a delivery nip (3) for at least one drawframe-treated roving (4), one of them forming a deflection length (5) with a slot-shaped suction zone (6) for the roving (4) exiting the exit nip (3), which extends between the delivery nip (3) and a pressure roller (7) arranged downstream in the sense of deflection, and having an air nozzle (8) offset sidewards with respect to the suction zone (6) for a blast of air directed towards the delivery roller (1) with a flow component transverse to the suction zone (6) which extends in an arc-shaped path between its feed end and its discharge end with the air nozzle (9) on the inside of the arc. To smoothly process long-staple fibres it is suggested that an additional air nozzle (9) associated with the pressure roller (7), which has a flow component transverse to the suction zone (6), be provided on the inside of the arc of the suction zone (6).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.