Patent ID: 6935171
Filing Date: 2005-08-30
Classification: B07C

Abstract:
1. Device for detecting overlapping objects in a transport path for flat objects, such as letters etc., whereby the transport path comprises a measurement path, in which measurement path a braking device is located by which a passing object or an object from a series of overlapping passing objects is decelerated in the measurement path, wherein the device comprises: a detection means in the measurement path for observing a passing object or an object from a series of overlapping passing objects, which detection means emits a presence signal in response to the presence of a passing object or an object from a series of overlapping passing objects, and a sensor in the measurement path, the emitted signal of which is a measure for the passing speed of an object or of an object from a series of overlapping passing objects, while the braking device comprises a braking roller, which in the presence of an object in the measurement path is in contact with that object, and the braking device is arranged such that the braking roller is decelerated during a predetermined first time span between the beginning and the end of the presence signal and in a predetermined manner, whereby the device comprises means to determine the change in passing speed resulting from the deceleration of the braking roller.