Bobbin for sewing machine
US6725793B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 11, 2003 |
| Grant date | Apr 27, 2004 |
| Priority date | — |
| Expiry date | Feb 11, 2023 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD05B57/28
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A bobbin for a sewing machine which is rotatably disposed in a rotary shell device of the machine to supply and under thread when performing a sewing operation, comprises of winding shaft separately inserted onto a fixed shaft of the rotary shuttle and on which the under thread is substantially wound, a first flange integrally formed at one end of the winding shaft, a second flange integrally formed at the other end of the winding shaft, and a partition flange forming a first winding portion between the first flange and the partition flange and forming a second winding portion between the second flange and the partition flange, a plurality of saw-toothed protrusions being formed at an entire outer circumference of the partition flange, and the protrusions having a linear sidewall that is oriented in a radial direction of the partition flange.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.