Ruffling device for mounting on a sewing machine
US5769014A · kind A · utility
Inventor
Key dates
| Filing date | Apr 2, 1997 |
| Grant date | Jun 23, 1998 |
| Priority date | — |
| Expiry date | Apr 2, 2017 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD05B35/085
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A ruffling device adapted for mounting on a sewing machine, includes: a base for attachment to a presser bar of the sewing machine, a pivotal lever mounted on the base connected to a needle bar of the sewing machine, so that the pivotal lever may be reciprocally pivoted as a needle-bar is vertically reciprocally moved; a work folding lever for folding a work fabric and movable in forward and rearward directions with respect to a feeding direction of the work fabric for a sewing operation, a motion conversion mechanism for converting the pivotal movement of the pivotal lever into the forward and rearward movement of the work folding lever, so that the work folding lever cooperates with a presser foot mounted on the base for forming a ruffle on the work fabric, a timing adjusting device for adjusting an operation timing of the work folding lever, and a stroke adjusting device for adjusting a stroke of movement of the work folding lever.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.