Sewing machine
US4100867A · kind A · utility
20Cited by
3References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 21, 1977 |
| Grant date | Jul 18, 1978 |
| Priority date | — |
| Expiry date | Jan 21, 1997 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD05B73/00
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
An electrically operated chain stitch sewing maching having a cartridge carrying a spool of thread and a pre-threaded needle mounted in the side of the head, the needle being normally biased in a retracted position within the cartridge and being actuated by a crank arm provided with means for rendering an electrical switch inoperative until the needle is retracted into the cartridge. The bed of the machine is provided with a thread looping subassembly actuated by the needle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.