Clutch type roller feed for a sewing machine needle thread

Details Clutch type roller feed for a sewing machine needle thread Clutch type roller feed for a sewing machine needle thread

1988-10-26

1991-04-30

Falik, Andrew M.

Sewing

Elements

Thread guiding or handling

112278, 112322, 226 37, 226152, 139452, D05B 4904

Patent

active

050108344

ABSTRACT:
A needle thread feeding assembly in which the thread is positively fed at a desired stitch pitch while being clamped in between a presser roller and a drive roller, whose rotation is frictionally transmitted from a drive source. An encoder detects a predetermined amount of rotation and signals to restrict the drive roller, while allowing the drive shaft to continue rotating. A main-shaft-angle-detector detects predetermined angles adapted to operate the required stitch pitch and to start counting of pulses at the encoder. When a required number of pulses corresponding to the stitch-pitch is counted, the encoder signals to restrict the drive roller. Thus, the needle thread is positively and intermittently fed according to the stitch pitch.

REFERENCES:
patent: 3962891 (1976-06-01), Rouzaud
patent: 4221317 (1980-09-01), Fukada et al.
patent: 4408554 (1983-10-01), Takiguchi et al.
patent: 4566396 (1986-01-01), Sakuma et al.
patent: 4649844 (1987-03-01), Matsubara
patent: 4766827 (1988-08-01), Matsubara

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