Original Publication Date: 1997-Oct-31
Included in the Prior Art Database: 2004-Apr-08
Xerox Disclosure Journal
Disclosed is device and method for detecting and preventing multi-feed or "slug" feed of cut sheet papers in, for example, a top fed stack feeder used in electrophotographic and liquid printing machines. A conventional top stack paper feeder is equipped with a sensor which is adapted for detecting multiple sheet feeds, that is other than a single sheet, from the stack feeder. The sensor is indexed with, for example, a feeder drive wheel and or a stack elevator, wherein multiple feeds can be readily detected by the sensor and which in turn signals the multi-feed condition to system controls to terminate the feed operation and signal an operator that a multi-feed situation exists and its machine location. The device and method effectively prevents multiple feed operations and protects machine components from damage that may arise therefrom.