| 摘要 |
A security document, such as a passport, is provided with secure binding means to prevent unravelling or other form of manual removal of the binding thread. The document is thereby secured against tampering in the form of page removal/replacement. The security document comprises a plurality of sheets held together by means of stitching, the stitching comprised of successive loops of thread. At least portions of the thread of a plurality of the loops is fusible and those portions are subject to becoming, or have been, fused by application of heat. When the thread is fused it is secure and is not subject to becoming unravelled. |
