(19)
(11) EP 1 466 755 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
24.01.2007 Bulletin 2007/04

(43) Date of publication A2:
13.10.2004 Bulletin 2004/42

(21) Application number: 04251937.1

(22) Date of filing: 31.03.2004
(51) International Patent Classification (IPC): 
B31F 1/07(2006.01)
 B42D 15/00(2006.01)
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR
Designated Extension States:
AL LT LV MK

(30) Priority: 03.04.2003 GB 0307753
03.04.2003 GB 0307754

(71) Applicant: De La Rue International Limited
Basingstoke, Hampshire RG22 4BS (GB)

(72) Inventors:
  • Howland, Paul
    Andover, Hants. SP10 2QR (GB)
  • Pearson, Nicholas George
    Kingsclere, Hampshire RG20 5PJ (GB)

(74) Representative: Bucks, Teresa Anne et al
BOULT WADE TENNANT, Verulam Gardens 70 Gray's Inn Road
London WC1X 8BT
London WC1X 8BT (GB)

   


(54) Corner reinforcing watermarks on sheets


(57) The invention relates to improvements in paper, and in particular to the use of watermarks alone or with embossings for strengthening paper sheets and documents made therefrom. The invention therefore provides a sheet having corners and sides joined at said corners, wherein corner reinforcing watermarks are provided at at least two of said corners, and at least one of which reinforcing watermarks has a border, at least a section of which has a complementary shape with respect to and is located close to at least a section of a border of a further watermark. The watermarks may additionally or alternatively be provided with embossings in a pattern dissimilar to that or the reinforcing watermarks.







Search report