Winding – tensioning – or guiding – Coil holder or support – Spool or core
Patent
1996-05-24
1998-06-23
Mansen, Michael
Winding, tensioning, or guiding
Coil holder or support
Spool or core
112273, 112279, 2421253, 242 36, B65H 5400, B65H 7528, B65H 6300
Patent
active
057693439
ABSTRACT:
An automatic lower-thread winder for use with a sewing machine which automatically rewinds lower thread around a bobbin loaded into the bobbin case, strings the bobbin case with the lower thread, and cuts the lower thread after the bobbin case is strung. The lower-thread winder removes slacks of the lower thread created during the stringing operation. The lower-thread winder is programmed to retry a predetermined number of automatic retrials of the stringing operation, and checks if it has succeeded in the stringing operation. As a consequence, even if it fails in the stringing operation, it repeats the stringing operation automatically or warns the operator. Thus, the lower-thread winder effectively prevents malfunctions caused by defective stringing operations.
REFERENCES:
patent: 3514615 (1970-05-01), Noiles et al.
patent: 3587493 (1971-06-01), Ivanko
patent: 4244313 (1981-01-01), Rovin et al.
patent: 4681050 (1987-07-01), Kosmas
patent: 5582355 (1996-12-01), Nakamura
patent: 5584257 (1996-12-01), Nakamura et al.
patent: 5606927 (1997-03-01), Nakamura et al.
Shinozuka Toshinobu
Tomioka Hiroyuki
Juki Corporation
Mansen Michael
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