Patent US3310461A successfully refreshed from Google Patents.
US3310461A
Expired / Lapsed
US
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Headbox for a papermaking machine
Assignee: Beloit Corp
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Filing: 1964-04-20
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Granted: 1967-03-21
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Expires: 1984-04-20
Abstract
No abstract record available.
Inventors
- 👤 Fred R Erbach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 06:27
CPC Classifications
D; D21; D21F; D21F1/00; D21F1/02; D21F1/028
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
A PAPER MACHINE STOCK HEADBOX FOR DISCHARGING STOCK ON A TRAVELLING FORMING SURFACE COMPRISING, A CLOSED HEADBOX CHAMBER WITH A PLANAR FLOOR AND A DOWNWARDLY INCLINED FORWARD WALL LEADING TOWARD A SLICE OPENING, A LOWER PROJECTION ON THE FLOOR AHEAD OF THE SLICE OPENING EXTENDING INTO THE FLOW STREAM ABSORBING ENERGY OF THE STOCK FLOW AND DEFLECTING THE STREAM UPWARDLY TO BE INTERCEPTED BY THE FLOW STREAM MOVING TOWARD THE OPENING, AND AN UPPER PROJECTION ON THE FORWARD WALL POSITIONED DOWNSTREAM OF THE LOWER PROJECTION AND BEING SMALLER THAN SAID LOWER PROJECTION.
Claim 2
Dependent Claim
92 words
A PAPER MACHINE STOCK HEADBOX FOR DISCHARGING STOCK ON A TRAVELLING FORMING SURFACE COMPRISING, A CLOSED HEADBOX CHAMBER WITH A PLANAR FLOOR AND A DOWNWARDLY INCLINED FORWARD WALL LEADING TOWARD A SLICE OPENING, A LOWER PROJECTION ON THE FLOOR AHEAD OF THE SLICE OPENING EXTENDING INTO THE FLOW STREAM ABSORBING ENERGY OF THE STOCK FLOW AND DEFLECTING THE STREAM UPWARDLY TO BE INTERCEPTED BY THE FLOW STREAM MOVING TOWARD THE OPENING, AND AN UPPER PROJECTION ON THE FORWARD WALL POSITIONED DOWNSTREAM OF THE LOWER PROJECTION AND BEING SMALLER THAN SAID LOWER PROJECTION.
References Cited (Backward Citations)
US1898372A
Cited
US2832268A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-03-20 | 1970-09-19 | 1971-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-20 | 1974-09-19 | 1975-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-20 | 1978-09-19 | 1979-03-21 | $7700.00 | Window Closed / Lapsed |