Automatic needle thread supply control system

Details Automatic needle thread supply control system Automatic needle thread supply control system

1987-02-19

1988-12-20

Nerbun, Peter

Sewing

Elements

Take-ups

112255, 112302, D05B 4900

Patent

active

047918764

ABSTRACT:
In a conventional sewing machine, as the take-up lever is driven by the take-up lever crank, the take-up lever does not keep its uppermost position during the feed motion of a work fabric. Accordingly, the length of the thread path extending from the thread supply source to the eye of the needle varies remarkably during feed motion, and thus the needle thread equivalent to the amount consumed by stitch feed motion cannot be extracted from the supply source. In the present automatic needle thread supply control system, during a specific period from a time before finishing of each feed motion to a time when the needle reaches the throat plate, the take-up lever is held at its uppermost position. During a given period corresponding to the comparatively latter half of the specified period, thread supply stopping is released, whereby the needle thread equivalent to the amount consumed by each stitch feed motion can be extracted certainly from the supply source toward the take-up lever. The present thread supply control system comprises, at least, thread securing means or driving means, thread supply stopping means and mechanical control means.

REFERENCES:
patent: 4215641 (1980-08-01), Dobrjanskyj et al.
patent: 4246857 (1981-01-01), Gonnai
patent: 4408554 (1983-10-01), Takiguchi et al.
patent: 4632048 (1986-12-01), Matsubara
patent: 4638751 (1987-01-01), Hanyu et al.
patent: 4690083 (1987-09-01), Hara et al.

Affiliated with

Also associated with

Rating

Automatic needle thread supply control system does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Automatic needle thread supply control system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Automatic needle thread supply control system will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1904388