Zigzag sewing machine with fabric-edge tracing function
US4664048A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 5, 1986 |
| Grant date | May 12, 1987 |
| Priority date | — |
| Expiry date | May 5, 2006 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD05B73/12
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A zig zag sewing machine having a feed device for feeding a workpiece in a feed direction on a work bed, an endwise reciprocable needle bar for carrying a needle, and a support member joggable laterally with respect to the feed direction and supporting the needle bar, including a detector having a light emitting portion and a light receiving portion and disposed on the support member for detecting the edge of the workpiece extending in the feed direction. The detector is movable laterally with respect to the feed direction in a predetermined positional relation with the support member at least when the support member is laterally moved. The lateral positions of the support member and the detector are changed by a driving device which is controlled so that an amount of light received by the light receiving portion coincides with a predetermined amount, whereby successive stitches to be formed by the needle are placed on a line which is away from the workpiece edge by a predetermined constant distance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.