Patent US3700858A successfully refreshed from Google Patents.
US3700858A
Expired / Lapsed
US
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Data processing system employing particular bar code configuration
Assignee: Pitney Bowes Alpex Inc
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Filing: 1971-02-24
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Granted: 1972-10-24
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Expires: 1991-02-24
Abstract
Abstract An illustrative embodiment of the invention is directed to an electro-optically readable coded document in which the code appears as a row of printed bars separated by spaces of controlled widths between the individual bars. The substitution of a pair of fine lines, termed a pulse pair, for each bar in the row, substantially enhances code reliability. These pulse pairs, when employed to define bar widths and used in combination with the associated spaces of different widths, constitute a binary code that is registered through an electro-optical system, e.g., a hand held reader which is drawn along the length of the document. Use of pulse pairs permits the generation of pulses of the same polarity, as well as AC coupled circuits that eliminate DC drift in order to provide a system which is less sensitive to differences in contrast variations and reader angle.
Inventors
- 👤 Nanjundiah N Murthy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:08
CPC Classifications
G; G06; G06K; G06K7/00; G06K7/10; G06K7/01; G06K7/016; G06K7/0166
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
98 words
In a data processing system utilizing a coded document having an array of bars of uniform width in combination with spaces between said bars wherein said code is provided by varying the width of the spaces and wherein electro-optical means are employed to scan said bars and spaces to produce an identifiable output pulse train in response thereto, the improvement comprising substituting said bars with pulse pairs comprising single discrete lines spaced at a distance equal to the width of said bars, the document surface between each of said pairs of lines being devoid of bar forming material.
Claim 2
Dependent Claim
98 words
In a data processing system utilizing a coded document having an array of bars of uniform width in combination with spaces between said bars wherein said code is provided by varying the width of the spaces and wherein electro-optical means are employed to scan said bars and spaces to produce an identifiable output pulse train in response thereto, the improvement comprising substituting said bars with pulse pairs comprising single discrete lines spaced at a distance equal to the width of said bars, the document surface between each of said pairs of lines being devoid of bar forming material.
Claim 3
Dependent Claim
29 words
A data processing system according to claim 1 wherein said pulse pairs are separated by variable distances in accordance with a preestablished code in order to record information therein.
Claim 4
Dependent Claim
69 words
A system according to claim 1, wherein said output pulse train comprises a series of pulse pairs having variable spacing between pairs, the spacing between the two pulses of all pairs being constant, and a circuit for converting each of said pulse pairs into individual pulses, said circuit comprising a blocking capacitor, an operational amplifier coupled to said blocking capacitor, and a toggling circuit responsive to said operational amplifier.
Claim 5
Dependent Claim
21 words
A system according to claim 3, wherein a differentiating circuit is operatively connected between said operational amplifier and said toggling circuit.
Claim 6
Dependent Claim
23 words
A circuit according to claim 4 further comprising a pair of emitter coupled transistors for coupling said differentiating circuit to said toggling circuit.
Claim 7
Dependent Claim
20 words
A circuit according to claim 5 further comprising another operational amplifier for connecting said differentiating circuit to said transistor pair.
Claim 8
Dependent Claim
69 words
A coded ticket comprising a base material, indicia for storing information on the ticket, said indicia being impressed on said base material, said indicia further comprising pairs of parallel lines, each of said lines in every pair being laterally separated from the companion line in said respective pair by equal widths, the spacings between said pairs being varied according to a predetermined code in order to store said information.
Claim 9
Dependent Claim
69 words
A coded ticket comprising a base material, indicia for storing information on the ticket, said indicia being impressed on said base material, said indicia further comprising pairs of parallel lines, each of said lines in every pair being laterally separated from the companion line in said respective pair by equal widths, the spacings between said pairs being varied according to a predetermined code in order to store said information.
Claim 10
Dependent Claim
16 words
A coded ticket according to claim 3 wherein said base material color contrasts with said indicia.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-24 | 1976-04-24 | 1976-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-24 | 1980-04-24 | 1980-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-24 | 1984-04-24 | 1984-10-24 | $7700.00 | Window Closed / Lapsed |