US3587858A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fiber handling and cleaning device
Assignee: Individual
•
Filing: 1969-11-04
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Granted: 1971-06-28
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Expires: 1989-11-04
Abstract
Abstract A MIXTURE OF TEXTILE FIBERS, DIRT, ETC. IS DROPPED INTO A CLEANING CONVEYOR WHICH COMPRISES A HELICAL FLIGHT MOUNTED ON A SHAFT AND POSITIONED OVER A PERFORATE BOTTOM. BRUSHES ON THE FLIGHT CONTACT THE PERFORATE BOTTOM. AT THE END OF THE CLEANING CONVEYOR THE CLEANED FIBERS ARE PICKED UP BY VACUUM. BELOW THE PERFORATE BOTTOM IS A SECOND SCREW CONVEYOR MOVING THE MATERIAL THAT GOES THROUGH THE SCREEN IN THE OPPOSITE DIRECTION. THIS MATERIAL IS PICKED UP AT THE FAR END OF THE SECOND CONVEYOR BY A VACUUM WHICH ALSO SERVES THE PURPOSE OF APPLYING A SUBATMOSPHERIC PRESSURE BELOW THE PERFORATE BOTTOM.
Inventors
- 👤 Lynn M Christianson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 08:25
CPC Classifications
B; B07; B07B; B07B1/00; B07B1/18; B07B1/20; D; D01; D01G; D01G9/00; D01G9/08; D01G9/10
Claims Analysis
Total Claims: 0
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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) | 1974-06-27 | 1974-12-27 | 1975-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-27 | 1978-12-27 | 1979-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-27 | 1982-12-27 | 1983-06-28 | $7700.00 | Window Closed / Lapsed |