Apparatus for backtacking thread chain for use with a two-needle

Details Apparatus for backtacking thread chain for use with a two-needle Apparatus for backtacking thread chain for use with a two-needle

1986-06-24

1988-10-04

Nerbun, Peter

Sewing

Elements

Thread cutting, severing or breaking

112288, 112302, D05B 5300

Patent

active

047749008

ABSTRACT:
In a two-needle overedge sewing machine, a thread chain guide recess is formed for positioning the thread chain at a given position on the throat plate so that the thread chain is spaced apart from the outer needle descending point. The thread chain guide recess may be made at a tip portion of an outer finger of the throat plate or at a tip portion of an outer finger of a presser foot. Furthermore, the thread chain guide recess may be formed by the combination of the outer finger of the throat plate and the outer finger of the presser foot. In an improved embodiment, a thread chain guide groove is formed in an upper surface of the outer finger of the throat plate so that the thread chain is substantially fully received therein.

REFERENCES:
patent: 4303030 (1981-12-01), Palacino et al.
patent: 4356782 (1982-11-01), Veyama et al.
patent: 4546716 (1985-10-01), Babson et al.
patent: 4644884 (1987-02-01), Tatsumi

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