Method for piecing a yarn and rotor spinning machine for carrying out the method
US8061116B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 2, 2006 |
| Grant date | Nov 22, 2011 |
| Priority date | — |
| Expiry date | Sep 26, 2027 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD01H13/32
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A method for piecing a yarn at a rotor spinning machine comprising plural spinning stations, wherein more than five piecers are successively produced in a measuring phase and coordinates of measurement values and associated measurement values from individual measurements of the piecers are evaluated for averaging and determining a fiber band function taking into account a drafting reduced for the measurement values, which reflects the fiber flow behavior in the form of the respective fiber band quantity supplied to the rotor as a function of the transport path of the fiber band feed. The speed of the fiber band feed is controlled in a delayed manner from the run-up of the yarn draw-off, dependent on the rotor speed, by the fiber band function, such that the fiber shortfall quantity being produced from the fiber band function is compensated by dynamic feed addition with respect to height and length.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.