METHOD TO MAKE PAPER WITH COUNTERFEIT PROTECTION, WITH LOCALLY ARRANGED PROTECTIVE ELEMENTS, DEVICE TO MAKE PAPER AND PAPER WITH COUNTERFEIT PROTECTION, WITH LOCALLY ARRANGED PROTECTIVE ELEMENTS Russian patent published in 2011 - IPC D21H23/24 D21H21/44 B42D15/00 

FIELD: textile, paper.

SUBSTANCE: paper with counterfeit protection is used in production of securities and documents. Method to make paper with locally arranged protective elements includes formation of the first paper cloth on the first meshy cylinder. Deposition of water dispersion containing protective elements via nozzles at certain sections of moist paper cloth. Formation of the second paper cloth at the second meshy cylinder. Joining first paper cloth with deposited protective elements with the second paper cloth, and also pressing and drying. Water dispersion of protective elements contains at least one water-soluble polymer in amount of 0.1-3.0 wt %. At the same time dispersion of protective elements is supplied with controlled speed via nozzles, every of which is equipped with pump of auger type.

EFFECT: increased quality of paper due to reduction of pulsations of flow dispersion and increased stability of protective elements deposition process in strictly required amount at certain sections of paper cloth.

8 cl, 1 dwg, 1 tbl