US Patent 7142334 Reading unit for a document

Patent 7142334 was granted and assigned to Keba Group on November, 2006 by the United States Patent and Trademark Office.

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Patent

Patent attributes

Current Assignee

Keba Group

Patent Jurisdiction

United States Patent and Trademark Office

Patent Number

7142334

Date of Patent

November 28, 2006

Patent Application Number

09646284

Date Filed

March 16, 1999

Patent Primary Examiner

‌

Cheukfan Lee

Patent abstract

The invention relates to a reading unit (1) for a document (2) having a control and/or evaluation device (44), incorporating a scanner device (25) for reading the document (2), and a guide mechanism (6) for the document (2) and a conveyor device (17) to effect a relative displacement between document (2) and scanner device (25). The control and/or evaluation device (44) cooperates with a compensating device (39) containing corrective values to correct the image signals (37) emitted by an optoelectric transducer (34) of the scanner device (25) in real time.

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