Patent US3853694A successfully refreshed from Google Patents.
US3853694A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Paper machine flow channel with a flexible plate projecting into the flow stream to act as an oscillator
Assignee: Beloit Corp
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Filing: 1973-04-24
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Granted: 1974-12-10
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Expires: 1993-04-24
Abstract
Abstract A mechanism for generating turbulence in a fiber stock flow including a flow chamber such as a headbox for a paper making machine having a flexible plate mounted on one wall at its upstream edge and extending in a downstream direction with a more rigid second plate mounted downstream from the first plate and extending toward the first with the first plate being flexible so as to vibrate due to hydrodynamic forces on the plate.
Inventors
- 👤 J Parker
- 👤 D Parker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:08
CPC Classifications
D; D21; D21F; D21F1/00; D21F1/02; D21F1/026; D21F1/028
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
96 words
A MECHANISM FOR GENERATING TURBULENCE IN A FIBER STOCK FLOW STREAM FOR IMPROVED DISPERSION COMPRISING IN COMBINATION: A FLOW CHAMBER THROUGH WHICH A STREAM OF FIBER CONTAINING STOCK FLOWS HAVING A WALL MEMBER AND EXTENDING IN THE DIRECTION OF FLOW; A FLEXIBLE PLATE EXTENDING AWAY FROM THE WALL MEMBER IN A DOWNSTREAM DIRECTION AND CONTILEVERLY MOUNTED ON THE WALL AT THE UPSTREAM EDGE OF THE PLATE WITH THE DOWNSTREAM EDGE SPACED FROM THE WALL MEMBER IN AN UNSTRESSED POSITION SO THAT ITS DOWNSTREAM EDGE WILL FLEX AND VIBRATE WITH FLOW OF STOCK ALONG SAID WALL MEMBER.
Claim 2
Dependent Claim
96 words
A MECHANISM FOR GENERATING TURBULENCE IN A FIBER STOCK FLOW STREAM FOR IMPROVED DISPERSION COMPRISING IN COMBINATION: A FLOW CHAMBER THROUGH WHICH A STREAM OF FIBER CONTAINING STOCK FLOWS HAVING A WALL MEMBER AND EXTENDING IN THE DIRECTION OF FLOW; A FLEXIBLE PLATE EXTENDING AWAY FROM THE WALL MEMBER IN A DOWNSTREAM DIRECTION AND CONTILEVERLY MOUNTED ON THE WALL AT THE UPSTREAM EDGE OF THE PLATE WITH THE DOWNSTREAM EDGE SPACED FROM THE WALL MEMBER IN AN UNSTRESSED POSITION SO THAT ITS DOWNSTREAM EDGE WILL FLEX AND VIBRATE WITH FLOW OF STOCK ALONG SAID WALL MEMBER.
Claim 3
Dependent Claim
33 words
A mechanism for generating turbulence in a fiber stocck flow stream for improved dispersion constructed in accordance with claim 1: wherein said plate is curved with its convex surface facing the flow stream.
Claim 4
Dependent Claim
37 words
A mechanism for generating turbulence in a fiber stock flow stream for improved dispersion constructed in accordance with claim 1: wherein said plate extends transversely along the wall for substantially the entire width of the flow chamber.
Claim 5
Dependent Claim
56 words
A mechanism for generating turbulence in a fiber stock flow stream for improved dispersion constructed in accordance with claim 1: including a second plate mounted on said wall at one edge and having the other edge position to be in alignment with the first plate at its bent position to form a pocket between said plates.
Claim 6
Dependent Claim
45 words
A mechanism for generating turbulence in a fiber stock flow stream for improved dispersion constructed in accordance with claim 1: and including means forming an opening through said second plate communicating between the space between said plates and the flow stream in the flow chamber.
Claim 7
Dependent Claim
36 words
A mechanism for generating turbulence in a fiber stock flow stream for improved dispersion constructed in accordance with claim 4: wherein said second plate is curved with its convex surface facing outwardly toward the flow stream.
Claim 8
Dependent Claim
39 words
A mechanism for generating turbulence in a fiber stock flow stream for improved dispersion constructed in accordance with claim 4: wherein said second plate extends toward the free edge of said first plate and projects in an upstream direction.
Claim 9
Dependent Claim
32 words
A mechanism for generating turbulence in a fiber stock flow stream for improved dispersion constructed in accordance with claim 4: wherein said second plate has a greater rigidity than the first plate.
Claim 10
Dependent Claim
101 words
A mechanism for generating high frequency oscillation in a fiber stock flow stream for improved dispersion comprising in combination: a flow chamber through which a stream of fiber containing stock flows having a wall member; and a flexible resilient oscillatable plate mounted at its upstream edge on the wall member and projecting in the direction of the flow stream with its downstream edge positioned spaced from the wall in an unstressed position and having a flexibility so that the wall will vibrate at a range extending from the high acoustic to superacoustic frequency with the flow of stock through the chamber.
Claim 11
Dependent Claim
101 words
A mechanism for generating high frequency oscillation in a fiber stock flow stream for improved dispersion comprising in combination: a flow chamber through which a stream of fiber containing stock flows having a wall member; and a flexible resilient oscillatable plate mounted at its upstream edge on the wall member and projecting in the direction of the flow stream with its downstream edge positioned spaced from the wall in an unstressed position and having a flexibility so that the wall will vibrate at a range extending from the high acoustic to superacoustic frequency with the flow of stock through the chamber.
Claim 12
Independent Claim
101 words
The method of generating fine scale turbulence in the flow stream of stock for a paper making machine comprising: positioning a continuous plate in a headbox mounted at its upstream edge on the wall member and projecting in the direction of the flow stream with its downstream edge positioned spaced from the wall said plate having a a surface continuous for the full width thereof exposed to the stream and extending in the general direction thereof, and inducing a vibration in said surface by stock flowing past the surface at a frequency range extending from high acoustic to super acoustic frequency.
Claim 13
Independent Claim
101 words
The method of generating fine scale turbulence in the flow stream of stock for a paper making machine comprising: positioning a continuous plate in a headbox mounted at its upstream edge on the wall member and projecting in the direction of the flow stream with its downstream edge positioned spaced from the wall said plate having a a surface continuous for the full width thereof exposed to the stream and extending in the general direction thereof, and inducing a vibration in said surface by stock flowing past the surface at a frequency range extending from high acoustic to super acoustic frequency.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-09 | 1978-06-10 | 1978-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-09 | 1982-06-10 | 1982-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-09 | 1986-06-10 | 1986-12-10 | $7700.00 | Window Closed / Lapsed |