FIELD: manufacture of paper, in particular, counterfeit-proof paper, and valuable document manufactured from such paper, manufacture method, cloth of papermaking machine and apparatus for manufacturing the same.
SUBSTANCE: counterfeit-proof paper has through opening made during papermaking process and free from definitely delimited edge on its edge portion. Paper may consist of two layers, first layer being provided with window formed during papermaking process. Paper comprises through opening having sizes less than window sizes. Method for manufacturing cloth of papermaking machine involves furnishing cloth with flexible or movable continuity disturbing member which prevents accumulation of pulp on cloth portion occupied by said member; forming paper web furnished with through opening; withdrawing paper web from cloth so that continuity disturbing member is deformed or sunk under cloth.
EFFECT: increased extent of protecting paper from counterfeit.
37 cl, 12 dwg, 1 tbl
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