Title:
METHOD AND DEVICE FOR PREVENTING STITCH LOOSENING
Document Type and Number:
Japanese Patent JP3318482
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To prevent the thread loosening of stitches and to cut a thread end short by hooking a hook to a looper thread on a needle left side in the left advanced state of a looper when sewing is ended, driving a sewing machine for a specified stitch number and then respectively cutting a needle thread, the looper thread between cloth and the looper and the engagement part of the looper thread hooked to the hook.
SOLUTION: When the end of sewing approaches, needles 5 and 6 are present almost at a top dead center and the looper 3 is present at an advance position, a hook knife 16 is turned clockwise. Thus, the looper thread 10 from the cloth W to the eyelet 3e of the looper 3 is hooked to the hook 15. Then, the sewing machine is driven for one stitch and a long looper thread loop 10L engaged with the hook 15 is formed above the looper 3. Then, the looper thread 10 from the cloth W to the looper 3 is hooked by the hook 26 and the two threads extended from the cloth W to the lower part of a looper blade 3b are cut by the hook 27. The hook knife 16 is turned counterclockwise and the engagement part of the looper thread 10 is cut.
Inventors:
Osamu Doan
Application Number:
JP6737496A
Publication Date:
August 26, 2002
Filing Date:
February 28, 1996
Export Citation:
Assignee:
Pegasus Sewing Machine Mfg. Co., Ltd.
International Classes:
D05B1/10; D05B61/00; D05B65/02; D05B57/02; (IPC1-7): D05B1/10; D05B61/00; D05B65/02
Domestic Patent References:
| JP6233877A | ||||
| JP1317475A | ||||
| JP52152356A | ||||
| JP662985U |