Sewing machine with latch back device
US5203270A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 20, 1990 |
| Grant date | Apr 20, 1993 |
| Priority date | — |
| Expiry date | Dec 20, 2010 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD05D2207/04
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
An apparatus and method for creating a "serging", "overlock" or "504" stitch wherein the excess thread chain (44) extending from the sewing machine needle to the previously sewn garment part (54) is cut in a manner to create a leading thread chain of a predetermined length extending from the sewing machine needle, and the free end of the leading thread chain is drawn off by a stream of air flowing into a hollow member (31) acting as a chaining tongue (29). The leading thread chain is subsequently progressively withdrawn from the chaining tongue and oversewn into the stitching of a succeeding garment. The hollow member (31) acting as the chaining tongue (29) is integrally formed with the throat plate (21) of the sewing machine (20). A vacuum reservoir (81) is connected to the hollow member (31) to create the air flow through the hollow member to draw the leading thread chain therein.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.