US3554866A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cylinder papermaking apparatus
Assignee: Boxboard Research and Development Association
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Filing: 1968-01-30
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Granted: 1971-01-12
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Expires: 1988-01-30
Abstract
Abstract TO PROVIDE AN IMPROVED RATIO OF STRENTH PROPERTIES IN THE MACHINE DIRECTION TO THE STRENGTH PROPERTIES IN THE CROSS MACHINE DIRECTION, A CYLINDER PAPERMAKING APPARATUS IS PROVIDED WITH MEANS TO CONTROL THE LINEAR VELOCITY OF THE PAPER STOCK RELATIVE TO THE TANGENTIAL VELOCITY OF THE ROTATING CYLINDER. THE VOLUME OF STOCK AVAILABLE AT THE AREA OF WEB FORMATION MAY BE CONTROLLED, AND IN CYLINDER MACHINE OF THE OVERFLOW KIND, THE POSITION AT WHICH THE STOCK OVERFLOWS CAN BE ADJUSTED.
Inventors
- 👤 Carl J Wynstra
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:09
CPC Classifications
D; D21; D21F; D21F9/00; D21F9/04
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) | 1974-01-11 | 1974-07-13 | 1975-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-11 | 1978-07-13 | 1979-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-11 | 1982-07-13 | 1983-01-12 | $7700.00 | Window Closed / Lapsed |