US3274636A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tape cleaner
Assignee: Unisys Corp
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Filing: 1964-06-29
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Granted: 1966-09-27
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Expires: 1984-06-29
Abstract
No abstract record available.
Inventors
- 👤 Raymond E Macgregor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:32
CPC Classifications
G; G11; G11B; G11B23/00; G11B23/50; G11B23/502
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
148 words
A TAPE CLEANER COMPRISING: A SCRAPER UNIT HAVING A RELATIVELY HARD SMOOTH CYLINDRICAL SURFACE FOR ENGAGEMENT WITH SAID TAPE, SAID SCRAPER UNIT HAVING A PAIR OF ARCUATE SLOTS, EACH OF SAID SLOTS INCLUDING A SINGLE CUTTING EDGE DISPOSED TO CONTACT SAID TAPE DURING OPERATION, A BLOCK ELEMENT HAVING A CHAMBER DISPOSED BELOW SAID SCRAPER UNIT FOR RECEIVING PARTICLES REMOVED FROM SAID TAPE BY SAID CUTTING EDGE, SAID CHAMBER BEING SHAPED TO PROVIDE A VORTEX MOVEMENT OF AIR WHEN AIR IS CAUSED TO BE MOVED WITHIN SAID CHAMBER, SAID BLOCK INCLUDING A PLURALITY OF APERTURES ARRANGED TO PERMIT AIR FROM THE ATMOSPHERE TO ENTER SAID CHAMBER IN THE SAME TANGENTIAL FLOW DIRECTION, AND VACUUM MEANS CONNECTED TO SAID CHAMBER TO CAUSE A VORTEX MOVEMENT OF SAID AIR WITHIN SAID CHAMBER TO FORCE PARTICLES REMOVED FROM SAID TAPE TO BE MOVED AWAY FROM SAID TAPE AND OUT OF SAID CHAMBER.
Claim 2
Dependent Claim
148 words
A TAPE CLEANER COMPRISING: A SCRAPER UNIT HAVING A RELATIVELY HARD SMOOTH CYLINDRICAL SURFACE FOR ENGAGEMENT WITH SAID TAPE, SAID SCRAPER UNIT HAVING A PAIR OF ARCUATE SLOTS, EACH OF SAID SLOTS INCLUDING A SINGLE CUTTING EDGE DISPOSED TO CONTACT SAID TAPE DURING OPERATION, A BLOCK ELEMENT HAVING A CHAMBER DISPOSED BELOW SAID SCRAPER UNIT FOR RECEIVING PARTICLES REMOVED FROM SAID TAPE BY SAID CUTTING EDGE, SAID CHAMBER BEING SHAPED TO PROVIDE A VORTEX MOVEMENT OF AIR WHEN AIR IS CAUSED TO BE MOVED WITHIN SAID CHAMBER, SAID BLOCK INCLUDING A PLURALITY OF APERTURES ARRANGED TO PERMIT AIR FROM THE ATMOSPHERE TO ENTER SAID CHAMBER IN THE SAME TANGENTIAL FLOW DIRECTION, AND VACUUM MEANS CONNECTED TO SAID CHAMBER TO CAUSE A VORTEX MOVEMENT OF SAID AIR WITHIN SAID CHAMBER TO FORCE PARTICLES REMOVED FROM SAID TAPE TO BE MOVED AWAY FROM SAID TAPE AND OUT OF SAID CHAMBER.
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) | 1969-09-26 | 1970-03-28 | 1970-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-26 | 1974-03-28 | 1974-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-26 | 1978-03-28 | 1978-09-27 | $7700.00 | Window Closed / Lapsed |