Patent US3158367A successfully refreshed from Google Patents.
US3158367A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pneumatic sheet separator
Assignee: Unisys Corp
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Filing: 1959-10-23
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Granted: 1964-11-24
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Expires: 1979-10-23
Abstract
No abstract record available.
Inventors
- 👤 Robert R Tarbuck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:11
CPC Classifications
B; B65; B65H; B65H3/00; B65H3/08; B65H3/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
156 words
A DEVICE FOR SEPARATING THE END SHEET FROM A STACK OF SHEETS COMPRISING, AN ELONGATED BODY HAVING A FIRST FLAT SURFACE AND A SECOND FLAT SURFACE AT AN ANGLE TO THE FIRST FLAT SURFACE AND HAVING A GROOVE IN SAID SURFACES EXTENDING LONGITUDINALLY OF THE BODY FROM ONE END OF SAID SECOND FLAT SURFACE, MEANS FOR POSITIONING SAID BODY WITH THE FIRST SURFACE ADJACENT AND SUBSTANTIALLY PARALLEL TO THE END SHEET OF SAID STACK AND SAID SECOND SURFACE AT AN ACUTE ANGLE TO SAID SHEET, AND MEANS FOR OPTIONALLY APPLYING A STREAM OF HIGH VELOCITY AIR UNDER VAUCUUM OR POSITIVE PRESSURE LONGITUDINALLY THROUGH A PORTION OF THE GROOVE IN THE FIRST SURFACE TO CAUSE SAID SHEET TO ADHERE SUCCESSIVELY TO SAID FIRST AND SECOND FLAT SURFACES AND SEAL AS LEAST A PORTION OF SAID GROOVE, THE AIR CONTINUING TO FLOW THROUGH SAID GROOVE THROUGH SAID ONE END AFTER SAID SEALING OF SAID PORTION OF SAID GROOVE.
Claim 2
Independent Claim
156 words
A DEVICE FOR SEPARATING THE END SHEET FROM A STACK OF SHEETS COMPRISING, AN ELONGATED BODY HAVING A FIRST FLAT SURFACE AND A SECOND FLAT SURFACE AT AN ANGLE TO THE FIRST FLAT SURFACE AND HAVING A GROOVE IN SAID SURFACES EXTENDING LONGITUDINALLY OF THE BODY FROM ONE END OF SAID SECOND FLAT SURFACE, MEANS FOR POSITIONING SAID BODY WITH THE FIRST SURFACE ADJACENT AND SUBSTANTIALLY PARALLEL TO THE END SHEET OF SAID STACK AND SAID SECOND SURFACE AT AN ACUTE ANGLE TO SAID SHEET, AND MEANS FOR OPTIONALLY APPLYING A STREAM OF HIGH VELOCITY AIR UNDER VAUCUUM OR POSITIVE PRESSURE LONGITUDINALLY THROUGH A PORTION OF THE GROOVE IN THE FIRST SURFACE TO CAUSE SAID SHEET TO ADHERE SUCCESSIVELY TO SAID FIRST AND SECOND FLAT SURFACES AND SEAL AS LEAST A PORTION OF SAID GROOVE, THE AIR CONTINUING TO FLOW THROUGH SAID GROOVE THROUGH SAID ONE END AFTER SAID SEALING OF SAID PORTION OF SAID GROOVE.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-11-24 | 1968-05-25 | 1968-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-11-24 | 1972-05-25 | 1972-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-11-24 | 1976-05-25 | 1976-11-24 | $7700.00 | Window Closed / Lapsed |