Method for detecting multiple overlapping covers in a mail...

B - Operations – Transporting – 07 – C

Patent

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B07C 1/04 (2006.01) B65H 7/12 (2006.01)

Patent

CA 2487076

The invention concerns a method for detecting multiple overlapping covers in a mail sorting installation (1) which consists in detecting a length variation in each cover by passing each cover in a plurality of passage detectors (4, 5, 6, 7). The passage detectors are located at different points of the mail sorting installation (1) and are configured to evaluate the length of each cover. During their displacement in the mail sorting installation, the multiple overlapping covers are gradually staggered from one another in particular as a result of mechanical frictions. Thus the global length of multiple overlapping covers tend to vary, such that an evaluation of the length variation of each cover supplies a reliable information for detecting the multiple overlapping covers. The evaluation of the length of a cover is relatively simple to implement, the performances of the installation are enhanced at a low cost.

Le procédé pour la détection de plis en prise multiple dans une installation de tri postal (1) consiste à détecter une variation de longueur de chaque pli en faisant passer chaque pli dans une pluralité de détecteurs de passage (4, 5, 6, 7). Les détecteurs de passage sont situés en différents points de l'installation de tri (1) et sont configurés pour évaluer la longueur de chaque pli. Durant leur trajet dans l'installation de tri, les plis en prise multiple se décalent progressivement les uns par rapport aux autres du fait notamment des frottements mécaniques. Ainsi, la longueur globale des prises multiples a tendance à varier, de telle sorte qu'une évaluation de la variation de longueur de chaque pli fournit une information fiable pour détecter les prises multiples. L'évaluation de la longueur d'un pli étant relativement simple à mettre en .oelig.uvre, les performances de l'installation sont améliorées pour un faible coût.

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