High capacity feeder initialization
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Sep 28, 1993
Grant Date -
N/A
app pub date -
Aug 21, 1992
filing date -
Aug 21, 1992
priority date (Note) -
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status (Latency Note)
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Abstract
An apparatus in which a stack of sheets is detected at a preselected location. An air jet is directed towards an edge of the stack of sheets at a preselected location. A pressure transducer is located at the prescribed location and positioned to have the air jet at impact thereon. The pressure transducer is enabled to transmit a signal indicative of the absence of the stack of sheets at the preselected location in response to the air jet impacting thereon. The pressure transducer is inhibited from transmitting the signal in response to the stack of sheets blocking the air jet. When the stack of sheets blocks the air jet, the signal from the pressure transducer indicates the presence of the stack of sheets at the preselected location. A pneumatic stack height detector of this type may be used to regulate the movement of a stack of sheets used in electrophotographic printing machines.
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