MONITORING RULER

摘要

Patent of utility model to security feature aiming at combating the couterfeiting of security documents equipped with variable position elements, by the monitoring of the counterfeits. It consists of the insertion in the security document (3) of graduated rulers (7 and 8) aiming at registering the position of certain elements (4 and 5), which positions can vary (9 and 10) in the authentic documents, but remain constant in the same family of counterfeits, furnishing link evidences for the identification of counterfeit families. The now proposed device allows the direct reading of these positions, free from variations and deformations caused by the counterfeit printing process, even if enlargements or reductions have occured during the process. Said security feature can have visible or hidden usage. In authentic document manufacturing, the use of monitoring rulers can be useful to the quality monitoring of the process.