Feeding control apparatus for a plurality of threads

Details Feeding control apparatus for a plurality of threads Feeding control apparatus for a plurality of threads

1989-01-18

1990-06-12

Nerbun, Peter

Sewing

Elements

Thread sensing

112163, 112302, D05B 4704

Patent

active

049323466

ABSTRACT:
Disclosed in a feeding control device for a plurality of threads in a sewing machine of the type wherein a set of a feed roller and a pressure roller are rotated forcibly at the same peripheral speed independently of the number of revolutions of a main drive shaft of the sewing machine so that a plurality of threads can be fed while the travel of each thread is controlled by each thread holding device. The present invention eliminates the necessity of securing high parallelism between both rollers to prevent their joint rotation, makes it possible to use a wear-resistant material for the pressure roller and can reduce breakage and damage of the thread due to friction with the rollers that are always rotating, at the time of stop of the thread.

REFERENCES:
patent: 3094855 (1963-06-01), Vossen
patent: 3207105 (1965-09-01), Card et al.
patent: 4018171 (1977-04-01), Stone et al.
patent: 4215641 (1980-08-01), Dobrjanskyj
patent: 4766827 (1988-08-01), Matsubara

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