Patent ID: 7121217
Filing Date: 2006-10-17
Classification: D05B

Abstract:
1. A sewing machine comprising: a needle bar supporting a sewing needle; a thread take-up lever; a needle thread supply; a thread tension mechanism including a thread tension regulator and a thread tension adjusting unit adjusting tension applied by the thread tension regulator; a plurality of thread hooking sections including the thread take-up lever and the thread tension regulator; a needle threading mechanism to automatically pass the needle thread through a thread eye of the sewing needle; a thread transferring mechanism automatically hooking onto the thread hooking sections the needle thread which extends from the thread supply and which is retained in a predetermined thread preparatory path while retaining the needle thread so that the needle thread can be turned over to the needle threading mechanism; and a control unit which controls the thread tension adjusting unit so that tension applied to the needle thread becomes a predetermined tension that correlates with a transfer position of the needle thread transferred by the thread transferring mechanism.