Magnetic revolving shuttle for double-stitch sewing machines
US6112684A · kind A · utility
Inventor
Key dates
| Filing date | Sep 3, 1999 |
| Grant date | Sep 5, 2000 |
| Priority date | — |
| Expiry date | Sep 3, 2019 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD05D2207/06
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A revolving shuttle for double-stitch sewing machines having an improved thread-holding capacity without a substantial increase in the volume of the bobbin case, and allowing an easy removal of the bobbin case. The novel shuttle comprises a bobbin case which can be removed from the shuttle by a magnet. The fact that the bobbin consists in part of a ferromagnetic material guarantees safe removal of the bobbin case and the bobbin. This allows the conventional mechanical removal mechanism arranged on the end face of the bobbin case to be omitted, and provides the possibility either to use a larger bobbin with unchanged volume of the bobbin case, or to reduce the volume of the bobbin case for a normal bobbin.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.