Jam monitoring device for a transport device for paper,...

B - Operations – Transporting – 65 – H

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B65H 26/00 (2006.01) B65H 7/06 (2006.01) B65H 26/02 (2006.01) B65H 43/00 (2006.01)

Patent

CA 2212042

In a jam monitoring device for a paper transporting device, the paper is transported between a driving roller (1) and a freely rotating pressure roller (3) whose axis is parallel to the axis of the driving roller (1). A stationary sensor (5, 8) is associated to each roller to monitor separately the speeds of the driving roller (1) and pressure roller (3). An evaluation circuit (7) is provided to compare the signals emitted by time or distance unit by both sensors. The evaluation circuit (7) emits a malfunction signal when the relation between the signals from the sensors (5, 8) deviates from a predetermined relation.

Dans ce dispositif de contrôle de bourrages pour dispositif de transport de papier, le papier est transporté entre un rouleau d'entraînement (1) et un rouleau de pression (3) librement rotatif dont l'axe est parallèle à l'axe du rouleau d'entraînement (1). Un capteur stationnaire (5, 8) est associé à chaque rouleau afin de contrôler séparément la vitesse du rouleau d'entraînement (1) et la vitesse du rouleau de pression (3). Un circuit d'évaluation (7) compare les signaux émis par les deux capteurs, par unité de temps ou de déplacement, et émet un signal de dérangement lorsque le rapport entre les signaux émis par les capteurs (5, 8) diffère d'un rapport prédéterminé.

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