Hooking arrangement for two-needle lockstitch sewing machines
US4993335A · kind A · utility
1Cited by
7References
1Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 23, 1989 |
| Grant date | Feb 19, 1991 |
| Priority date | — |
| Expiry date | May 23, 2009 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD05B57/14
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A two-needle lockstitch sewing machine apparatus providing a hooking arrangement such that each thread loop is positioned in the same direction in relation to the needle position. The hooking arrangement is effective to stitch each left and right stitch line with a needle thread having almost the same degree of twist. Thus, uniform stitch lines are obtained and the "edge effect" which is often experienced when the needle thread passes through the needle eye during stitching is eliminated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.