Title:
SEWING MACHINE UNDER-THREAD SUPPLY DEVICE
Document Type and Number:
WIPO Patent Application WO/2024/058457
Kind Code:
A1
Abstract:
A sewing machine under-thread supply device of the present invention enables an under-thread (2) loosened from a large under-thread bobbin (80) mounted on one side of an upper part of a sewing machine body (1) to be rapidly and continuously supplied up to the inside of a hook body (40) along the inside of a guide pipe (30) by an air pressure difference while a tension is controlled regardless of a friction resistance, without a separate tool, so that, when the under-thread (2) is supplied, stress of the under-thread (2), which occurs by a friction resistance due to use of a sagging prevention ring and a tension control part of a conventional under-thread (2), can be removed, thereby preventing twist and breaking phenomenon.
Inventors:
YANG SONG-CHUL (KR)
LEE KYUNG-MI (KR)
LEE KYUNG-MI (KR)
Application Number:
PCT/KR2023/012604
Publication Date:
March 21, 2024
Filing Date:
August 24, 2023
Export Citation:
Assignee:
YANG SONG CHUL (KR)
LEE KYUNG MI (KR)
LEE KYUNG MI (KR)
International Classes:
D05B59/00; D05B57/14; D05B57/26
Foreign References:
| KR200298704Y1 | 2002-12-27 | |||
| KR20070054789A | 2007-05-30 | |||
| KR200174084Y1 | 2000-03-15 | |||
| KR20170100187A | 2017-09-04 | |||
| JP2855060B2 | 1999-02-10 |
Attorney, Agent or Firm:
HANYANG PATENT FIRM (KR)
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