Looper thread paying-out apparatus for sewing machine

Details Looper thread paying-out apparatus for sewing machine Looper thread paying-out apparatus for sewing machine

1994-11-16

1996-01-30

Crowder, C. D.

Sewing

Elements

Take-ups

112254, 112302, D05B 4900, D05B 4700

Patent

active

054873479

ABSTRACT:
The present invention provides a looper thread paying-out apparatus of sewing machine in which apparatus a variation of paying-out tension of the thread from a bobbin does not affect a seam.
Just before a thread tensioner of a looper system which feeds a looper thread from a bobbin of sewing machine through to thread tensioner, an auxiliary paying-out apparatus is provided for paying out previously a portion of thread for a length of one stitch corresponding to an amount of horizontal cloth feed and feeding that portion into the thread tensioner at zero tension.

REFERENCES:
patent: 2725840 (1955-12-01), Zeier
patent: 4325314 (1982-04-01), Niem
patent: 4917033 (1990-04-01), Satoma
patent: 4991528 (1991-02-01), Bellio
patent: 5249538 (1993-10-01), Nakano et al.

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