Scanner for and method of repetitively scanning a coded symbology

• US 6,669,091 B2
• Filed: 03/02/2001
• Issued: 12/30/2003
• Est. Priority Date: 08/26/1988
• Status: Expired due to Fees

• Current Assignee: Accu-Sort Systems Incorporated (Datalogic S.p.A.)
• Original Assignee: Accu-Sort Systems Incorporated (Datalogic S.p.A.)
• Inventors: Wurz, David A., Sharpe, Jeffrey G.
• Primary Examiner(s): Lee, Michael G.
• Assistant Examiner(s): Franklin, Jamara A.
• Application Number:
  US09/798,117
• Publication Number:
  US 20010045462A1
• Time in Patent Office: 1,033 Days
• Field of Search: 235/462.12, 235/462.01, 235/462.16, 235/454
• US Class Current: 235/462.12
• CPC Class Codes: G06K 7/0166 by means of clock-signals derived from the code marks, e.g. self-clocking code
• CPC Class Codes: G06K 7/10871 randomly oriented data-fields, code-marks therefore, e.g. concentric circles-code
• CPC Class Codes: G06K 7/14 using light without selection of wavelength, e.g. sensing reflected white light G06K7/10831 - G06K7/1097 take precedence
• CPC Class Codes: G06K 7/1491 the method including a reconstruction step, e.g. stitching two pieces of bar code together to derive the full bar code

Abstract

A scanner can read machine-readable code on an object. A scanner has a scanning device, a data device, and a registration device. The scanning device can repetitively scan the code and provide a scan signal repetitively corresponding to at least fragments of the code. The data device is coupled to the scanning device and responds to its scan signal for repetitively storing it. The registration device is coupled to the data device for reconstructing the code from at least two of the fragments of the code by relatively shifting the code fragments until they are in registration.

Claims

1. A scanner for reading a coded symbology on an object, comprising:

scanning means for repetitively scanning coded symbology and for providing a scan signal producing a series of counts corresponding to transitions in at least fragments of the coded symbology;

data means coupled to said scanning means and responsive to said scan signal of said scanning means for selectively storing said counts;

comparing means coupled to said data means for comparing stored counts from successive scan signals; and

registration means coupled to said data means for reconstructing at least a portion of said coded symbology using the stored counts from at least two of said fragments of said coded symbology.

2. A method for reading a coded symbology on an object, comprising the steps of:

repetitively scanning said coded symbology and obtaining a series of counts corresponding to transitions in at least fragments of said coded symbology;

selectively recording said fragments of said coded symbology based on comparisons of stored counts from successive scan signals; and

reconstructing at least a portion of said coded symbology from stored counts corresponding to transitions in at least two of said fragments of said code.