Method and drafting arrangement for spinning machines for processing a fiber sliver
US4413378A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 29, 1982 |
| Grant date | Nov 8, 1983 |
| Priority date | — |
| Expiry date | Mar 29, 2002 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD01H5/505
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The present invention concerns a method for processing a fiber sliver in a drafting arrangement, and a drafting arrangement for implementing the method. The objective for a drafting arrangement, which can be adapted to a wide range of staple lengths, to draft a fiber sliver at high speeds, has led to the following features of the invention: PA0 (a) The fiber sliver is deflected simultaneously in the drafting process systematically in such a manner that, the fiber sliver can be inserted into the subsequently arranged funnel and the subsequently arranged pair of calender rolls without further deflection. PA0 (b) All bottom rolls are fixedly arranged. PA0 (c) The first pressure rolls limiting the pre-drafting zone and the main drafting zone, respectively, are arranged to be shiftable along an arc about the rotational axis of the corresponding bottom roll in such a manner that the drafting zones are adaptable to the fiber length. PA1 In order to position these pressure rolls accurately in parallelism with respect to the corresponding bottom roll on the arc, there are provided arresting devices co-axially arranged with respect to the arc for taking-up bearing block pairs supporting the …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.