Sewing or embroidery machine

Details Sewing or embroidery machine Sewing or embroidery machine

2007-01-16

2007-01-16

Izaguirre, Ismael (Department: 3765)

Sewing

Method of sewing

C112S278000

Reexamination Certificate

active

11374338

ABSTRACT:
To determine the thread supply on a lower-thread bobbin (17), holes (19) are arranged in the shape of a spiral in a flange (21) of the bobbin. Light from a light source (35), which is directed towards the flange (21), is reflected only by those holes (19), behind which there is no longer any thread, so that the light beams (36) reach the rear flange (22) and can be reflected therefrom and received by the light receiver (39).

REFERENCES:
patent: 4805544 (1989-02-01), Dobner et al.
patent: 4934292 (1990-06-01), Mardix et al.
patent: 5161475 (1992-11-01), Tawara et al.
patent: 6810824 (2004-11-01), Durville
patent: 6996451 (2006-02-01), Asai et al.
patent: 34 47 138 (1986-07-01), None
patent: 1 375 725 (2003-03-01), None

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