Method for sewing on buttons and wrapping neck thread in a button sewing machine
US5092256A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 2, 1990 |
| Grant date | Mar 3, 1992 |
| Priority date | — |
| Expiry date | Aug 2, 2010 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD05B3/14
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A button sewing machine includes a table which is reciprocated, and which is moved at a right angle to the direction of reciprocation by use of motors, instead of by a mechanical movement and a ROM (read-only memory) as found in conventional machines. The desired changes in stitch number and, in particular, a button sewing on pattern, are controlled automatically by making use of an electronic control device. Needle drop positions at which a deep stitch (show stitch) and a shallow stitch (ordinary stitch) are to be carried out are established by the use of two cylinders. Once a neck thread is sewn, during forward movement of the table the middle of the neck thread is wrapped and then during rearward movement of the table the outside of the neck thread is wrapped, or, the outside of the neck thread is wrapped during the forward movement and the middle of the neck thread is wrapped during the rearward movement, or only the outside of the neck thread is wrapped during both the forward movement and the rearward movement of the table. Then, as a last step, the wrapped or bunched part is subject to end stitching. This apparatus dispenses with the replacement of cams and ROMs that wear ou…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.