Patent ID: 9488587
Filing Date: 2016-11-08
CPC Classification: B65H,G01N

Claim Text:
1. A system for detecting on the fly double-feed flat items such as documents or mail articles conveyed in a mail processing machine, comprising: at least one detection device mounted on a support element of the mail processing machine at a tilt angle α in relation to a transport deck which is selected so as to scan a front end part and a front face of the moving flat items, for directing a beam of radiant energy from a radiation source toward the moving flat items, scanning them with the beam and receiving at least a portion of the beam of radiation reflected from them, the at least one detection device comprising: a controller configured to receive the signal S from the triangulation sensor and generate an output signal V indicative of both a flat item profile and a double-feed condition when it detects a significant break point or change in slope of the output signal V from a first direction to a second direction.