Fibrous substrates

Details Fibrous substrates Fibrous substrates

2007-09-04

2007-09-04

Hug, Eric (Department: 1731)

Paper making and fiber liberation

Processes and products

Safety, identification and fraud preventing paper

C283S057000, C283S058000, C283S059000

Reexamination Certificate

active

10518507

ABSTRACT:
A fibrous security substrate for use in producing documents includes at least one aperture extending therethrough and contains an elongate impermeable element at least partially embedded therein such that at least one edge thereof is exposed in the aperture.

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