Patent ID: 6646768
Filing Date: 2003-11-11
Classification: G03G,H04N

Abstract:
An image scanner comprising:a single contact glass disposed on a main body, the contact glass having a first range through which a first original document is passed to be scanned, and a second range over which a second original document is positioned to be scanned, the second range including the first range; an image sensor scanning the first original document at a fixed position in the first range and scanning the second original document while the image sensor moves through the second range; an automatic document feeder arranged on the main body covering the contact glass and being openable to expose the contact glass, the automatic document feeder conveying the first original document through a feed path to the fixed position and ejecting the first original document through an ejecting path from the fixed position; a detector adapted to detect when the automatic document feeder is opened and to detect a leading edge of the first original document whenever a document page is conveyed alone the feed path to the first fixed position; and an automatic document feeder controller, the detector electrically coupled to the controller, the controller responsive to signals generated by the detector for preventing the conveyance of a document page of the first original document to the fixed position whenever a document page of the second original document is positioned on the contact glass in the second range, wherein the controller provides a warning to a user to check the contact glass in the event it is determined that a second original document is positioned on the contact glass in the second range.