False twisting apparatus and method
US4387557A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 12, 1981 |
| Grant date | Jun 14, 1983 |
| Priority date | — |
| Expiry date | Jun 12, 2001 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD02G1/087
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A yarn false twisting apparatus and method is provided which permits ready conversion from S to Z twist, or vice versa. The apparatus comprises a pair of friction discs which are rotatably mounted on a common carrier plate, and the carrier plate is pivotally mounted to the frame of the apparatus such that the discs may be selectively rotated between first and second operative positions disposed 180 degrees from each other. The discs are rotated in a common rotational direction in each operative position, and the yarn is advanced through a twisting zone between the discs in a direction parallel to a line extending perpendicularly between the axes of rotation of the discs. Thus conversion from S to Z twist, or vice versa, may be effected by pivoting the carrier plate between the two operative positions, without changing the direction of rotation of the discs or the yarn path of travel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.