Thread tension device for sewing machine

Details Thread tension device for sewing machine Thread tension device for sewing machine

2008-04-16

2009-02-24

Izaguirre, Ismael (Department: 3765)

Sewing

Elements

Tensioning

C112S302000, C112S259000

Reexamination Certificate

active

07493866

ABSTRACT:
A thread tension device includes paired thread tension discs holding a needle thread, a thread tension spring biasing one of the discs toward the other, a thread tension dial adjusting a tension exerted on the needle thread, a spring force adjusting cam formed in the thread tension dial, a transfer plate following the cam so as to be capable of adjusting the spring force, and a first adjusting member threadingly engaged with the transfer plate to receive one end of the thread tension spring, a thread guide assembly having a through hole formed so that the adjusting tool is insertable into the through hole, and a second adjusting member rotatably mounted on the transfer plate and engageable with the distal end of the adjusting tool inserted into the through hole so as to be rotatable with the tool, thereby rotating the first adjusting member by rotation of the tool.

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patent: A-2001-327784 (2001-11-01), None
patent: B2-3314093 (2002-05-01), None

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