Electrophotography – Diagnostics – Document handling
Reexamination Certificate
2011-06-28
2011-06-28
Colilla, Daniel J (Department: 2854)
Electrophotography
Diagnostics
Document handling
C399S021000, C399S405000, C271S003150, C271S010020, C271S182000, C271S202000, C271S258030, C271S270000
Reexamination Certificate
active
07970294
ABSTRACT:
A document feeding apparatus includes a first delivery roller delivering a document sheet discharged from a fixing unit, a second delivery roller discharging the document sheet to a paper delivery tray, a motor driving the second delivery roller, a lever installed at the downstream, or upstream, side of the first delivery roller out of a document sheet transporting pathway, which rotates at a predetermined angle when contacting the document sheet and returns to an original position when not contacting the document sheet, a sensor sensing a rotation time and a returning time of the lever, and a controller determining a double feeding or slipping state of the document sheet based on a signal transferred from the sensor regarding the rotation time and the returning time of the lever, and controlling the driving speed of the motor according to the determination result.
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Colilla Daniel J
Pham Andy L
Samsung Electronics Co,. Ltd.
Staas & Halsey , LLP
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