US2729136A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for detecting pin holes in sheets
Assignee: United States Steel Corp
•
Filing: 1954-05-27
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Granted: 1956-01-03
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Expires: 1974-05-27
Abstract
No abstract record available.
Inventors
- 👤 Daniel E Feick
- 👤 Roy E Howell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:51
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/84; G01N21/88; G01N21/89; G01N21/892; G01N21/894; B; B21; B21B; B21B38/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
129 words
APPARATUS FOR DETECHING PIN HOLES IN SHEETS HAVING SUBSTANTIALLY PARALLEL SIDE EDGES COMPRISING MEANS FOR CONVEYING SAID SHEETS IN A SUBSTANTIALLY HORIZONTAL PATH, A LIGHT SOURCE AT ONE SIDE OF THE PATH OF TRAVEL OF SAID SHEETS; PHOTOSENSITIVE MEANS ON THE OPPOSITE SIDE OF THE PATH OF TRAVEL OF SAID SHEETS ALIGNED WITH THE LIGHT SOURCE, SAID LIGHT SOURCE AND PHOTOSENSITIVE DEVICE HAVING A LENGTH SUBSTANTIALLY AS GREAT AS THE WIDTH OF THE SHEET BEING INSPECTED, SPACED GUIDES LOCATED AT EACH EDGE OF THE SHEET BEING INSPECTED, EACH OF SAID GUIDES HAVING A SUBSTANTIALLY HORIZONTAL PORTION EXTENDING FROM THE SHEET ENTRY END THEREOF TO A POSITION BEYOND THE SAID LIGHT SOURCE AND AN UPWARDLY EXTENDING OUTER PORTION, SAID OUTER PORTIONS BEING SPACED APART A DISTANCE ONLY SLIGHTLY GREATER THAN
Claim 2
Dependent Claim
129 words
APPARATUS FOR DETECHING PIN HOLES IN SHEETS HAVING SUBSTANTIALLY PARALLEL SIDE EDGES COMPRISING MEANS FOR CONVEYING SAID SHEETS IN A SUBSTANTIALLY HORIZONTAL PATH, A LIGHT SOURCE AT ONE SIDE OF THE PATH OF TRAVEL OF SAID SHEETS; PHOTOSENSITIVE MEANS ON THE OPPOSITE SIDE OF THE PATH OF TRAVEL OF SAID SHEETS ALIGNED WITH THE LIGHT SOURCE, SAID LIGHT SOURCE AND PHOTOSENSITIVE DEVICE HAVING A LENGTH SUBSTANTIALLY AS GREAT AS THE WIDTH OF THE SHEET BEING INSPECTED, SPACED GUIDES LOCATED AT EACH EDGE OF THE SHEET BEING INSPECTED, EACH OF SAID GUIDES HAVING A SUBSTANTIALLY HORIZONTAL PORTION EXTENDING FROM THE SHEET ENTRY END THEREOF TO A POSITION BEYOND THE SAID LIGHT SOURCE AND AN UPWARDLY EXTENDING OUTER PORTION, SAID OUTER PORTIONS BEING SPACED APART A DISTANCE ONLY SLIGHTLY GREATER THAN
References Cited (Backward Citations)
US1833027A
Cited
US2312626A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-01-02 | 1959-07-04 | 1960-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-02 | 1963-07-04 | 1964-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-02 | 1967-07-04 | 1968-01-03 | $7700.00 | Window Closed / Lapsed |