US3434923A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Headbox of a papermaking machine
Assignee: Beloit Corp
•
Filing: 1965-08-04
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Granted: 1969-03-25
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Expires: 1985-08-04
Abstract
No abstract record available.
Inventors
- 👤 Louis E Dennis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:24
CPC Classifications
D; D21; D21F; D21F1/00; D21F1/02; D21F1/028
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
86 words
IN A HEADBOX HAVING A PAIR OF SPACED SIDE WALLS AND A SLICE OPENING FORMED THEREIN FOR DELIVERING STOCK FLOWING THROUGH SAID HEADBOX TO A TRAVELLING FORMING WIRE, A PAIR OF BLEED OPENINGS FORMED RESPECTIVELY IN SAID SIDE WALLS IMMEDIATELY UPSTREAM OF AND ADJACENT SAID SLICE OPENING TO EFFECT DISCHARGE OF A PORTION OF THE STOCK THERETHROUGH TO INCREASE THE FLOW OF STOCK NEXT TO SAID SIDE WALLS FOR IMPROVING THE UNIFORMITY OF THE BASIS WEIGHT PROFILE OF STOCK ACROSS THE WIDTH OF THE FORMING WIRE.
Claim 2
Dependent Claim
86 words
IN A HEADBOX HAVING A PAIR OF SPACED SIDE WALLS AND A SLICE OPENING FORMED THEREIN FOR DELIVERING STOCK FLOWING THROUGH SAID HEADBOX TO A TRAVELLING FORMING WIRE, A PAIR OF BLEED OPENINGS FORMED RESPECTIVELY IN SAID SIDE WALLS IMMEDIATELY UPSTREAM OF AND ADJACENT SAID SLICE OPENING TO EFFECT DISCHARGE OF A PORTION OF THE STOCK THERETHROUGH TO INCREASE THE FLOW OF STOCK NEXT TO SAID SIDE WALLS FOR IMPROVING THE UNIFORMITY OF THE BASIS WEIGHT PROFILE OF STOCK ACROSS THE WIDTH OF THE FORMING WIRE.
References Cited (Backward Citations)
US2788719A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-24 | 1972-09-23 | 1973-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-24 | 1976-09-23 | 1977-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-24 | 1980-09-23 | 1981-03-25 | $7700.00 | Window Closed / Lapsed |