Device for use with a bobbin-less coil of thread

Details Device for use with a bobbin-less coil of thread Device for use with a bobbin-less coil of thread

1994-07-27

1996-11-05

Nerbun, Peter

Sewing

Elements

Thread sensing

242173, D05B 4500

Patent

active

055706460

ABSTRACT:
A device, preferably of disc configuration, capable of being fastened to a bobbin-less coil of thread for indicating the non-rotation of the coil during a sewing operation. One side of the device includes indicating means enabling the optical detection of the rotation of the device. The opposite side of the device includes fastening means, such as pins or adhesive, for fastening the device to a coil of thread, the fastening means being capable of disengaging from the coil when a predetermined length of thread remains therein.

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