| 摘要 |
PROBLEM TO BE SOLVED: To realize a thread tensioner which creates at least two variable, preset thread tension values for a thread by a simple means. SOLUTION: The thread tensioner (9) for a sewing machine has a supporting plate (12) equipped with a first thread tensioning device (18) and a second thread tensioning device (17) on the supporting plate, and the tension load to the thread (10) is overcome. For the purpose, a release lever (31) is connected with the supporting plate (12), and works to abut on a release pin (30) of the thread tensioning devices (17, 18). The thread tensioner (9) works in a manner that the release lever (31) abuts on the first thread tightening device (18) first and then the second thread tensioning device (17) with the progress of the pivotably moving processes by separate releasing steps by using a solenoid (36). COPYRIGHT: (C)2005,JPO&NCIPI
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