The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 29, 2013
Filed:
Jan. 04, 2008
Cyril Pellaton, Colombier, CH;
Marco Bart, Berne, CH;
Giuseppe Acunto, Fribourg, CH;
Michael Enz, Berne, CH;
Cyril Pellaton, Colombier, CH;
Marco Bart, Berne, CH;
Giuseppe Acunto, Fribourg, CH;
Michael Enz, Berne, CH;
De la Rue International Limited, Hampshire, GB;
Abstract
A method of monitoring a sequence of documents passing along a transport path is described. The method including: operating a radiation transmitter with a control signal at a first, working, level to cause radiation at a first intensity to impinge on one side of a document as it passes an inspection position in the transport path; receiving at a radiation receiver, radiation from the transmitter that has passed through the document, the radiation receiver generating an output signal with a level related to the intensity of the received radiation; and monitoring the output signal to detect the presence and/or a characteristic of the document. A calibration process is carried out between successive documents, the calibration process including: operating the radiation transmitter with a control signal at a second, calibration, level to cause radiation at a second intensity less than the first intensity to be transmitted towards the receiver, and adjusting the level of the resultant output signal from the receiver to a predetermined value.