Paper sheets metal thread part or magnetic element pattern detector or paper sheets metal thread part or magnetic element pattern detection method

• US 7,589,339 B2
• Filed: 08/22/2005
• Issued: 09/15/2009
• Est. Priority Date: 08/30/2002
• Status: Expired due to Fees

• Current Assignee: Fujitsu Frontech Limited (Fujitsu Limited)
• Original Assignee: Fujitsu Frontech Limited (Fujitsu Limited)
• Inventors: Mukai, Masanori
• Primary Examiner(s): Epps; Georgia Y
• Assistant Examiner(s): Ko; Tony
• Application Number:
  US11/207,829
• Publication Number:
  US 20050285057A1
• Time in Patent Office: 1,485 Days
• Field of Search: 250/559.44, 250/559.1, 250/559.45, 250/559.11, 250/45, 250/44, 250/4, 382/135, 382/138, 235/449
• US Class Current: 250/559.11
• CPC Class Codes: G07D 7/0034 using watermarks
• CPC Class Codes: G07D 7/04 Testing magnetic properties of the materials thereof, e.g. by detection of magnetic imprint G07D7/01 takes precedence
• CPC Class Codes: G07D 7/121 Apparatus characterised by sensor details
• CPC Class Codes: G07D 7/164 Thickness
• CPC Class Codes: G07D 7/187 Detecting defacement or contamination, e.g. dirt

Abstract

A paper sheets feature detector 20, through which a banknote 21 is carried and passed is provided with a carrying-in sensor part 22, a transmissive and reflective line light sensor 23, a magnetic sensor 24, a thickness sensor 27, and a carrying-out sensor part 28. When a watermark part of the banknote 21 is measured by the line light sensor 23, a watermark pattern is detected by a light transmissive sensor, and that pattern is not detected by a light reflective sensor, the banknote 21 is determined to be a true banknote. Watermark braille is similarly processed. When the thread is detected by the light transmissive sensor and the thread is not detected by the light reflective sensor, the banknote 21 is determined to be a true banknote.

Claims

1. A paper sheets feature detector comprising at least:

a carrying-in sensor;

a light transmissive line sensor disposed ahead of the carrying-in sensor, the light transmissive line sensor measuring a thread part of a paper sheet by scanning the paper sheet from front end part to back end part, the light transmissive line sensor having a detection area that is substantially continuous and corresponds to a maximum width of the paper sheet;

a magnetic line sensor disposed ahead of the light transmissive line sensor, the magnetic line sensor measuring the thread part; and

a determination unit for determining that the paper sheet is a true paper sheet only when both of a result of measurement by the light transmissive line sensor shows existence of said thread part and a result of measurement by the magnetic line sensor shows existence of said thread part.

2. A paper sheets feature detection method comprising:

providing a carrying-in sensor;

disposing a light transmissive line sensor ahead of the carrying-in sensor;

measuring a thread part of a paper sheet by scanning the paper sheet from front end part to back end part by the light transmissive line sensor, the light transmissive line sensor having a detection area that is substantially continuous and corresponds to a maximum width of the paper sheet;

disposing a magnetic line sensor ahead of the carrying-in sensor;

measuring the thread part by the magnetic line sensor; and

determining that the paper sheet is a true paper sheet only when both of a result of measurement by the light transmissive line sensor shows existence of the thread part and a result of measurement by the magnetic line sensor shows existence of the thread part.

3. A paper sheets feature detector comprising at least:

a carrying-in sensor;

a light transmissive line sensor disposed ahead of the carrying-in sensor, the light transmissive line sensor measuring a thread part of a paper sheet by scanning the paper sheet from front end part to back end part, the light transmissive line sensor having a detection area that is substantially continuous and corresponds substantially to a maximum width of the paper sheet;

a magnetic line sensor disposed ahead of the light transmissive line sensor, the magnetic line sensor measuring the thread part; and

a determination unit for determining that the paper sheet is a true paper sheet only when both of a result of measurement by the light transmissive line sensor shows existence of the thread part and a result of measurement by the magnetic line sensor shows existence of the thread part.