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:
Jun. 20, 2006
Filed:
Jan. 07, 2002
John Buttifant, West Sussex, GB;
John Alan Skinner, Hampshire, GB;
Peter Dilwyn Evans, Hampshire, GB;
Michael Potter, Hampshire, GB;
Peter Alan Pullan, Hampshire, GB;
Barry Clifford Scowen, Surrey, GB;
John Buttifant, West Sussex, GB;
John Alan Skinner, Hampshire, GB;
Peter Dilwyn Evans, Hampshire, GB;
Michael Potter, Hampshire, GB;
Peter Alan Pullan, Hampshire, GB;
Barry Clifford Scowen, Surrey, GB;
De la Rue International Limited, Hampshire, GB;
Abstract
A method of detecting a magnetic thread comprises causing relative movement between the thread and an array of magnetic heads, each head generates a signal upon detecting a portion of the thread. The arrival of a thread at one of the heads is detected, that head being denoted a primary head, and the head on each side a secondary head. Output signals from the primary and secondary heads are monitored to generate a representation of the thread, and the magnitude of the signals from the primary and secondary heads are compared such that if the magnitude of the output signal from a secondary head exceeds that from the primary head, the primary and secondary heads are reallocated accordingly.