Security paper comprising localized areas with reduced thickness and opacity, and method for making same

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 6402888
SERIAL NO

08862361

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Abstract

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A method for making a paper sheet comprising at least one region which is thinner than the rest of the sheet. According to the method, a first paper layer (3) is formed on a wire in a first wet end of a paper-making machine, a second paper layer (5) is formed on a wire in a second wet end of the paper-making machine, one of the two paper layers has a number of localized tinner regions (8) so that the thickness (e.sub.2) of said paper layers in said regions is up to 50% less than the thickness (e.sub.t) of the rest of the sheet, and the two layers are joined together and dried. The resulting paper may be used in banknotes or checks.

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Patent Owner(s)

Patent OwnerAddress
WIGGINS ARJO117 QUAI DU PRESIDENT ROOSEVELT 92442 ISSY-LSSY-LES-MOULINEAUX CEDEX

International Classification(s)

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  • 1997 Application Filing Year
  • D21H Class
  • 149 Applications Filed
  • 79 Patents Issued To-Date
  • 53.03 % Issued To-Date
Click to zoom InYear of Issuance% of Matters IssuedCumulative IssuancesYearly Issuances1997199819992000200120020255075100

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Doublet, Pierre Jouy-sur-Morin, FR 32 268
Douesneau, Yves Le Kremlin Bicetre, FR 1 19
Menez, Jean-Paul Verrieres le Buisson, FR 2 49

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Patent Citation Ranking

  • 19 Citation Count
  • D21H Class
  • 50.65 % this patent is cited more than
  • 23 Age
Citation count rangeNumber of patents cited in rangeNumber of patents cited in various citation count ranges237131073111201 - 1011 - 2021 - 3031 - 4041 - 5051 - 6061 - 7091 - 100100 +0102030402.557.512.51517.522.52527.532.53537.5

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