Patent US3597315A successfully refreshed from Google Patents.
US3597315A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vertical twin-wire paper machine
Assignee: Black Clawson Co
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Filing: 1968-10-30
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Granted: 1971-08-03
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Expires: 1988-10-30
Abstract
Abstract IN A TWO-WIRE VERTICAL PAPER MACHINE, THE OPPOSED UPWARDLY TRAVELING REACHES OF THE TWO WIRES ARE GUIDED IN CONVERGING RELATION TO DEFINE A FORMING ZONE OF PREDETERMINED DIMENSIONS, AND A STOCK JET IS DISCHARGED UPWARDLY INTO THIS FORMING ZONE AT A VELOCITY SUFFICIENTLY HIGHER THAN WIRE SPEED TO ASSURE UPWARDLY DIRECTED PRESSURE HEAD ON THE LIQUID COMPONENT OF THE STOCK SUBSTANTIALLY THROUGHOUT THE FORMING ZONE. THE DIMENSIONS AND DIRECTION OF THE STOCK JET ARE CONTROLLED SUCH THAT THE JET PASSES FREELY INTO THE FORMING ZONE IS SPACED RELATION TO EACH OF THE WIRES TO IMPINGE ON THE WIRES ABOVE THE MOUTH OF THE FORMING ZONE DEFINED BETWEEN A PAIR OF BREAST ROLLS.
Inventors
- 👤 Willard C Notbohm
- 👤 Paul M Schaffrath
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:10
CPC Classifications
D; D21; D21F; D21F9/00; D21F9/003; Y; Y10; Y10S; Y10S162/00; Y10S162/07
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) | 1974-08-02 | 1975-02-01 | 1975-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-02 | 1979-02-01 | 1979-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-02 | 1983-02-01 | 1983-08-03 | $7700.00 | Window Closed / Lapsed |