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US3363458A
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US
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Apparatus for detecting surface imperfections on moving webs
Assignee: Cutler Hammer Inc
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Filing: 1966-02-11
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Granted: 1968-01-16
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Expires: 1986-02-11
Abstract
No abstract record available.
Inventors
- 👤 Erich J Scharf
- 👤 William B Finnegan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:32
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/84; G01N21/88; G01N21/89; G01B; G01B11/00; G01B11/02; G01B11/06; G01B11/0691; G01B7/00; G01B7/34; G01N19/00; G01N19/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
135 words
AN IN-PROCESS INSPECTION SYSTEM FOR DETECTING LOCALIZED IRREGULARITIES IN THICKNESS OF A MOVING WEB OF SHEET MATERIAL, COMPRISING (A) A PLURALITY OF WEB SURFACE SENSING MEMBERS, EACH HAVING A SENSING REGION THAT EXTENDS TRANSVERSELY OF THE WEB OVER A RESPECTIVE DIFFERENT PORTION OF THE WIDTH OF THE WEB, (B) EACH OF SAID SENSING MEMBERS BEING ACTUATED BY SURFACE HEIGHT VARIATIONS ONLY IN THE PORTION OF THE WEB MOVING PAST THE RESPECTIVE SENSING REGION, SUBSTANTIALLY INDEPENDENTLY OF THE LATERAL POSITION OF SUCH VARIATION WITHIN SAID SENSING REGION, (C) A PLURALITY OF DIFFERENTIAL TRANSDUCER MEANS, EACH COUPLED TO A RESPECTIVE PAIR OF NEIGHBORING SENSING MEMBERS AND RESPONSIVE SUBSTANTIALLY ONLY TO UNLIKE ACTUATION OF THE SENSING MEMBERS OF SAID RESPECTIVE PAIRS TO PROVIDE AN OUTPUT SIGNAL, AND (D) MEANS RESPONSIVE TO SUCH OUTPUT SIGNAL TO INDICATE AN IRREGULARITY.
Claim 2
Dependent Claim
135 words
AN IN-PROCESS INSPECTION SYSTEM FOR DETECTING LOCALIZED IRREGULARITIES IN THICKNESS OF A MOVING WEB OF SHEET MATERIAL, COMPRISING (A) A PLURALITY OF WEB SURFACE SENSING MEMBERS, EACH HAVING A SENSING REGION THAT EXTENDS TRANSVERSELY OF THE WEB OVER A RESPECTIVE DIFFERENT PORTION OF THE WIDTH OF THE WEB, (B) EACH OF SAID SENSING MEMBERS BEING ACTUATED BY SURFACE HEIGHT VARIATIONS ONLY IN THE PORTION OF THE WEB MOVING PAST THE RESPECTIVE SENSING REGION, SUBSTANTIALLY INDEPENDENTLY OF THE LATERAL POSITION OF SUCH VARIATION WITHIN SAID SENSING REGION, (C) A PLURALITY OF DIFFERENTIAL TRANSDUCER MEANS, EACH COUPLED TO A RESPECTIVE PAIR OF NEIGHBORING SENSING MEMBERS AND RESPONSIVE SUBSTANTIALLY ONLY TO UNLIKE ACTUATION OF THE SENSING MEMBERS OF SAID RESPECTIVE PAIRS TO PROVIDE AN OUTPUT SIGNAL, AND (D) MEANS RESPONSIVE TO SUCH OUTPUT SIGNAL TO INDICATE AN IRREGULARITY.
References Cited (Backward Citations)
US2523184A
Cited
US3037381A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-01-15 | 1971-07-17 | 1972-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-01-15 | 1975-07-17 | 1976-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-01-15 | 1979-07-17 | 1980-01-16 | $7700.00 | Window Closed / Lapsed |