Claims
- 1. An apparatus for stitching material in a sewing machine, comprising:
- a throat plate having a stitch tongue;
- a stitch forming instrumentality for forming an overedge stitch comprising, a needle, an upper looper, and a lower looper;
- first means for applying tension to a first thread passing to the upper looper;
- second means for applying tension to a second thread passing to the needle;
- third means for applying tension to a third thread passing to the lower looper;
- fourth means for selectively applying tension to the first thread;
- fifth means for selectively applying tension to the second thread;
- sixth means for selectively applying tension to the third thread;
- means for actuating the fourth and sixth tension means to release tension on the first and third threads while applying tension by the fifth tension means during sewing on a fabric;
- means for subsequently actuating the fifth tension means to release tension on the second thread while applying tension on the fourth and sixth tension means to form a loose chain of stitches on the stitch tongue; and
- means for blowing the chain of stitches off the stitch tongue.
- 2. The apparatus of claim 1 including a presser foot located above the throat plate, and in which the blowing means comprises a blower in the presser foot adjacent the stitch tongue.
Parent Case Info
This is a division of application Ser. No. 050,360, filed May 18, 1987, now U.S. Pat. No. 4,796,552.
US Referenced Citations (3)
Number |
Name |
Date |
Kind |
4254723 |
Rothstein |
Mar 1981 |
|
4356782 |
Veyama et al. |
Nov 1982 |
|
4452156 |
Teetz et al. |
Jun 1984 |
|
Foreign Referenced Citations (1)
Number |
Date |
Country |
315295 |
Aug 1956 |
CHX |
Divisions (1)
|
Number |
Date |
Country |
Parent |
50360 |
May 1987 |
|