Hand-held magnetic ink character recognition system

• US 6,659,347 B1
• Filed: 08/20/2001
• Issued: 12/09/2003
• Est. Priority Date: 08/20/2001
• Status: Expired due to Fees

• Current Assignee: Digital Check Corp
• Original Assignee: Unisys Corporation
• Inventors: Moore, Michael J., Gudenburr, John Charles
• Primary Examiner(s): Lee, Michael G.
• Assistant Examiner(s): NGUYEN, KIMBERLY D
• Application Number:
  US09/933,224
• Time in Patent Office: 841 Days
• Field of Search: 235/449, 235/462.16, 235/474, 235/482, 235/472.01
• US Class Current: 235/449
• CPC Class Codes: G06K 7/016 Synchronisation of sensing process
• CPC Class Codes: G06K 7/082 using inductive or magnetic sensors

Abstract

The present invention relates to a hand-held magnetic ink character recognition system 10 having an integrated position/speed feedback device 20, such as an optical encoder. The position/speed feedback device 20 is provided to compensate for variable speeds generated by manual operation.

Claims

1. A hand-held apparatus for the magnetic recognition of a plurality of ink characters sequentially disposed on a surface of a medium for use during manual conveyance, said apparatus comprising:

a housing substantially compact in size and functionally manageable by hand;

a read head disposed within said housing and provided for magnetically reading said ink characters disposed on said surface of said medium;

a feedback device for detecting the speed of the read head during manual conveyance of said apparatus and sampling from the read head based on the detected read head speed to produce data that is adjusted to compensate for read speed variations due to manual operation; and

an output cable for transferring the data from said hand-held apparatus to a data processor.

2. The apparatus according to claim 1 wherein said housing further includes an extended arm portion for maintaining a line of sight on said medium.

3. The apparatus according to claim 1 further including a code wheel for integrating said read head and said feedback device wherein the rotation of said code wheel relays feedback.

4. The apparatus according to claim 3 wherein said read head further includes an anti-frictional component.

5. The apparatus according to claim 4 wherein said anti-frictional component is substantially disposed circumferentially around the code wheel of said read head.

6. The apparatus according to claim 3 wherein said code wheel further includes a plurality of slots disposed along the known circumference of said code wheel.

7. The apparatus according to claim 3 wherein said code wheel rotates during the manual conveyance of said apparatus across said media.

8. The apparatus according to claim 7 wherein said rotation of said code wheel produces feedback.

9. The apparatus according to claim 8 wherein said feedback device processes said feedback and compensates for variable speeds generated by said code wheel during manual conveyance.

10. The apparatus according to claim 1 wherein said feedback device is an optical encoder.

11. The apparatus according to claim 10 wherein said feedback device further includes a logic control processor.

12. Method for magnetically recognizing ink characters disposed on a surface of a medium using a hand-held recognition device for manual conveyance, said method comprising the steps of:

providing a hand-held recognition device and a medium;

positioning said hand-held recognition device along said medium wherein ink characters containing magnetic particles are disposed;

manually conveyancing said device along said medium in a substantially planar direction whereby a read head is positioned relative to said ink characters for detecting a magnetic signal due to said magnetic particles provided by said ink characters;

processing said magnetic signal provided by said ink characters;

compensating for said manual conveyance to produce data that is adjusted to compensate for read speed variations by using a feedback device which collects a position feedback signal; and

transferring said data from said hand-held recognition device to a data processor.

13. The method according to claim 12 wherein said detected magnetic signal is converted into a digital magnetic signal by a digital converter.

14. The method according to claim 13 further including the step of controlling said digital magnetic signal by processing said position feedback signal through a logic control processor disposed internal to said feedback device and transferring said position feedback signal to said data processor.

15. The method according to claim 13 wherein said position feedback signal and said magnetic digital signal are processed by software running on said data processor, resulting in a text of string characters.

16. The method according to claim 12 further including the step of reducing friction provided between the hand-held device and said medium by disposing an anti-frictional component adjacent to said read head.