<p>A security thread (2), for identification of security documents such as banknotes, has a magnetic layer (4) sandwiched between polymeric layers (6, 8), where one of the layers (8) is a piezoelectric layer such as PVDF. The piezoelectric layer (8) may be poled intermittently such the piezoelectric layer is coded. A particularly compact security thread with enhanced multiple coded features is thus provided.</p>
申请公布号
WO9901292(A1)
申请公布日期
1999.01.14
申请号
WO1998IB00999
申请日期
1998.06.29
申请人
THE WHITAKER CORPORATION;THE GOVERNOR AND COMPANY OF THE BANK OF ENGLAND;CHORLEY, BRIAN;BROWN, RICHARD, HUNTER;YASKOWSKI, JOSEPH, FRANCIS
发明人
CHORLEY, BRIAN;BROWN, RICHARD, HUNTER;YASKOWSKI, JOSEPH, FRANCIS
