Four-step buttonhole mechanism for sewing machines
US4577575A · kind A · utility
6Cited by
5References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 23, 1985 |
| Grant date | Mar 25, 1986 |
| Priority date | — |
| Expiry date | Sep 23, 2005 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD05B19/00
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A sewing machine buttonholing mechanism is disclosed wherein feed balance between buttonhole side stitches is attained by positioning of buttonholing cam means rather than by the balance control of the driven cam controlled feed mechanism, and zero feed during bar tacking is independently set and uninfluenced by side stitch equalization.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.