Security yarn and production method therefor

Details Security yarn and production method therefor Security yarn and production method therefor

2008-03-04

2008-03-04

Gray, Jill (Department: 1774)

Stock material or miscellaneous articles

Coated or structually defined flake, particle, cell, strand,...

Rod, strand, filament or fiber

C428S364000, C428S377000, C428S385000, C057S210000, C057S212000, C057S223000, C057S003000, C057S007000, C057S009000

Reexamination Certificate

active

09763515

ABSTRACT:
According to the present invention, there is provided a security thread whose existence is not clarified, which is prevented beforehand from being removed, which can be attached even to a form of a commodity heretofore regarded as difficult, and whose use purpose range is enlarged, and the security thread can be constituted by a core member comprising a soft magnetic fiber (1) or the soft magnetic fiber and a core thread (4), and a cover member (2, 3) comprising a nonmetal material to cover the core member, constituted by covering the core member comprising the soft magnetic fiber or the soft magnetic fiber and core thread and a semi-hard magnetic material (10′) with the cover member, or constituted by covering the soft magnetic fiber or the core member comprising the soft magnetic fiber and a thermal welding thread (9) with the cover member.

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