D - Textiles – Paper – 21 – F
Patent
D - Textiles, Paper
21
F
D21F 1/44 (2006.01) D21F 11/04 (2006.01)
Patent
CA 2134199
2134199 9322496 PCTABS00027 Apparatuses and a method are disclosed for making an authenticated web formed from fibrous material. In one embodiment, the apparatus (20) includes a head box (24) holding a pulp mixture (26) for depositing a base web (22) on a Fourdrinier table (33) whereon the fibres in the base web are aligned and the base web is dried. An optically variable material applicator (60) is located above the base web and deposits optically variable material thereon. The applicator does this either in the form of a powder spray, or by embedding optically variable articles into the base web. Once this is done, the base web passes beneath a second head box (70) which deposits a thin fibrous layer over the optically variable material and the base web. The fibrous layer and the base web are dried to form the finished authenticated fibrous web. The thickness of the resulting fibrous web is controlled so that light is able to pass through the fibrous layer allowing the properties of the optically variable material to be utilized. In another embodiment, a cylinder mould machine (322) is used to form the base web on a belt (328) which supports and transports the base web to the optically variable material applicator and then to the second head box. Alternatively, the base web with the optically variable material thereon may be conveyed to a laminator wherein a fine web of fibrous material is placed over the base web and optically variable material to form the authenticated fibrous web.
Disano John Nicholas
Goodanetz John W.
Whitehead Graham D.
Mccarthy Tetrault Llp
Vadeko International Incorporated
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