Multiple document detection system
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Feb 22, 2000
Grant Date -
N/A
app pub date -
Oct 29, 1998
filing date -
Oct 29, 1998
priority date (Note) -
Expired
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Abstract
A multi-item detector for use with a document feeder for feeding documents along a document path includes first and second vacuum heads having juxtaposed faces and being spaced apart on opposite sides along the document path. Each head is adapted to be connected to a vacuum source. The faces of the vacuum heads include a plurality of apertures through which a vacuum is applied for drawing documents into contact with either the first or second vacuum head. A first vacuum sensor is coupled to the first vacuum head. A second vacuum sensor is coupled to the second vacuum head. Each of the sensors have an on-state and an off-state for sensing an increase in vacuum level when a document contacts one of the vacuum heads in order to place the sensor in the on-state. When multiple documents are present in the document path, both sensors are in the on-state.
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