US3893077A
Expired / Lapsed
US
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Method and a system for checking the accuracy of information derived from an encoded carrier member
Assignee: Svenska Dataregister AB
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Filing: 1973-01-09
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Granted: 1975-07-01
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Expires: 1993-01-09
Abstract
Abstract A data record consisting of a series of markings representing a code such as on a tag or label is checked for errors generated by spots or smudges associated with the markings by measuring the width of a marking including any associated spot or smudge and comparing the measured width and the width of previous and successive markings and the length of the spacing between such previous and successive markings and said measured width.
Inventors
- 👤 Rune L Myren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:34
CPC Classifications
G; G06; G06K; G06K7/00; G06K7/01; G06K7/016; G06K7/0166; G06K5/00
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
170 words
A method for checking for information errors during reading of data carriers containing a series of markings representing a coded record, the code comprising markings have predetermined widths, and the errors being generated by markings having an error-causing spot associated therewith comprising the steps of: detecting the leading and trailing edge of each marking in a series of at least three markings and computing the width of each of said at least three markings; computing the distance, m, between the trailing edge of the first detected marking and the leading edge of the second detected marking; computing the distance, o, between the trailing edge of said second-detected marking and the leading edge of the thirddetected marking; comparing the computed width, n, of said second-detected marking with said distance m and emitting an error signal if said width n exceeds said distance m by a predetermined ratio; and comparing said width n with said distancE o and emitting an error signal if width n exceeds distance o by a predetermined ratio.
Claim 2
Independent Claim
170 words
A method for checking for information errors during reading of data carriers containing a series of markings representing a coded record, the code comprising markings have predetermined widths, and the errors being generated by markings having an error-causing spot associated therewith comprising the steps of: detecting the leading and trailing edge of each marking in a series of at least three markings and computing the width of each of said at least three markings; computing the distance, m, between the trailing edge of the first detected marking and the leading edge of the second detected marking; computing the distance, o, between the trailing edge of said second-detected marking and the leading edge of the thirddetected marking; comparing the computed width, n, of said second-detected marking with said distance m and emitting an error signal if said width n exceeds said distance m by a predetermined ratio; and comparing said width n with said distancE o and emitting an error signal if width n exceeds distance o by a predetermined ratio.
Claim 3
Dependent Claim
68 words
Method in accordance with claim 1 further comprising the steps of: comparing said width n with the computed width, l, of said first-detected marking and emitting an error signal if width n exceeds width l by a predetermined ratio; and comparing said width n with the computed width, p, of said third-detected marking and emitting an error signal if width n exceeds width p by a predetermined ratio.
Claim 4
Dependent Claim
60 words
Method in accordance with claim 2 wherein: first counter means computes the width of each of said markings; and second counter means determines the distance between the leading edge of said first-detected marking and the trailiing edge of said second-detected marking and the distance between the leading edge of said second-detected marking and the trailing edge of said third-detected marking.
Claim 5
Dependent Claim
31 words
Method in accordance with claim 3 wherein: said first counter means comprises a first counter for computing said width n and a second counter for computing said widths l and p.
Claim 6
Dependent Claim
59 words
Method in accordance with claim 4 wherein: said second counter means comprises a third counter for determining the distance between the leading edge of said first-detected marking and the trailing edge of said second-detected marking and a fourth counter for determining the distance between the leading edge of said second-detected marking and the trailing edge of said third-detected marking.
Claim 7
Dependent Claim
39 words
Method in accordance with claim 5 wherein: said first counter means and said third counter are supplied with a counting pulse having a first frequency; and said fourth counter is supplied with a counting pulse having a second frequency.
Claim 8
Dependent Claim
15 words
Method in accordance with claim 6 wherein: said second frequency is twice said first frequency.
Claim 9
Dependent Claim
34 words
Method in accordance with claim 7 wherein: a reflection detector emits signals representing the markings and the distances between said markings to said first counter means and said second counter means via gate means.
Claim 10
Dependent Claim
61 words
Method in accordance with claim 8 wherein: said gate means comprises a first gate coupled to said first counter, a second gate coupled to said second counter, a third gate coupled to said third counter and a fourth gate coupled to said fourth counter; said first frequency pulse being applied to said first, second and third gates and said fourth gate.
Claim 11
Independent Claim
188 words
A device for checking for information errors during reading of data carriers containing a series of markings representing a coded record, the code comprising markings having predetermined widths, and the errors being generated by markings having an error-causing spot associated therewith comprising: reflection detector means for detecting the leading and trailing edge of each marking in a series of at least three markings and computing the width of each of said at least three markings; computing means for computing the distance m between the trailing edge of the first detected marking and the leading edge of the second detected marking; said computing means computing the distance o between the trailing edge of said second-detected marking and the leading edge of the third-detected marking; comparing means for comparing the computed width n of said second-detected marking with said distance m; and emitting means for emitting an error signal if said width n exceeds said distance m by a predetermined ratio; said comparing means comparing said width n with said distance o; and said emitting means emitting an error signal if width n exceeds distance o by a predetermined ratio.
Claim 12
Independent Claim
188 words
A device for checking for information errors during reading of data carriers containing a series of markings representing a coded record, the code comprising markings having predetermined widths, and the errors being generated by markings having an error-causing spot associated therewith comprising: reflection detector means for detecting the leading and trailing edge of each marking in a series of at least three markings and computing the width of each of said at least three markings; computing means for computing the distance m between the trailing edge of the first detected marking and the leading edge of the second detected marking; said computing means computing the distance o between the trailing edge of said second-detected marking and the leading edge of the third-detected marking; comparing means for comparing the computed width n of said second-detected marking with said distance m; and emitting means for emitting an error signal if said width n exceeds said distance m by a predetermined ratio; said comparing means comparing said width n with said distance o; and said emitting means emitting an error signal if width n exceeds distance o by a predetermined ratio.
Claim 13
Dependent Claim
74 words
Device in accordance with claim 10, wherein: said comparing means compares said width n with the computed width, l, of said first-detected marking; said emitting means emitting an erRor signal if width n exceeds width l by a predetermined ratio; and said comparing means compares said width n with the computed width, p of said third-detected marking; said emitting means emitting an error signal if width n exceeds width p by a predetermined ratio.
Claim 14
Dependent Claim
71 words
Device in accordance with claim 11 wherein: said reflection detector means includes first counter means for computing the width of each of said markings and said computing means includes second counter means for determining the distance between the leading edge of said first-detected marking and the trailing edge of said second-detected marking and the distance between the leading edge of said second-detected marking and the trailing edge of said third-detected marking.
Claim 15
Dependent Claim
31 words
Device in accordance with claim 12 wherein: said first counter means comprises a first counter for computing said width n and a second counter for computing said widths l and p.
Claim 16
Dependent Claim
59 words
Device in accordance with claim 13 wherein: said second counter means comprises a third counter for determining the distance between the leading edge of said first-detected marking and the trailling edge of said second-detected marking and a fourth counter for determining the distance between the leading edge of said second-detected marking and the trailing edge of said third-detected marking.
Claim 17
Dependent Claim
45 words
Device in accordance with claim 14 wherein: said first counter means and said third counter are supplied with a counting pulse having a first frequency; and said fourth counter is supplied with a counting pulse having a second frequency which is twice said first frequency.
Claim 18
Dependent Claim
34 words
Device in accordance with claim 15 wherein: said reflection detector emits signals representing the markings and the distances between said markings to said first counter means and said second counter means via gate means.
Claim 19
Dependent Claim
68 words
Device in accordance with claim 16 wherein: said gate means comprises a first gate coupled to said first counter, a second gate coupled to said second counter, a third gate coupled to said third counter and a fourth gate coupled to said fourth counter; said first frequency pulse being applied to said first, second and third gates and said second frequency pulse being applied to said fourth gate.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-06-30 | 1978-12-30 | 1979-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-30 | 1982-12-30 | 1983-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-30 | 1986-12-30 | 1987-07-01 | $7700.00 | Window Closed / Lapsed |