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:
Dec. 29, 1998
Filed:
May. 20, 1996
Douglas L Milne, Dundee, GB;
NCR Corporation, Dayton, OH (US);
Abstract
An apparatus for detecting the passage of superposed sheets, e.g. deposited currency notes, along a feed path includes a mechanism which has a pair of cooperating rollers (42,44) and which is arranged to generate an output voltage whose magnitude varies in response to the passage of an item (single or multiple sheet) between the rollers (42,44). Samples of this output voltage are taken during one complete revolution of one of the rollers (42,44). These samples are processed to generate a value representative of the cross-sectional area of said item. In order to take account of sheets of different sizes, a further value is generated representative of the dimension of said item parallel to its direction of feed. The value representing said cross-sectional area is divided by this further value in order to derive a value which represents the average thickness of said item and which enables a determination to be made as to whether said item is a single or multiple sheet.