US4042503A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Classifier and process for recycled fiber separation
Assignee: Beloit Corp
•
Filing: 1975-02-19
•
Granted: 1977-08-16
•
Expires: 1995-02-19
Abstract
Abstract A fiber classifying mechanism and method including a first chamber having an inlet for receiving fibers to be classified carried in a fluid suspension and having an outlet from the same chamber. A second chamber receives a controlled split of flow from the first chamber through a screen between the chambers having openings of a size to pass reject fibers. Means are provided for controlling the split of flow by a valve in the outlets from the respective chambers so as to control the flow through the screen. A foil moves past the screen to agitate fibers collected on the surface of the screen.
Inventors
- 👤 Edgar J. Justus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:10
CPC Classifications
D; D21; D21D; D21D5/00; D21D5/02; D21D5/023; D21D5/026; B; B01; B01D; B01D29/00; B01D29/11; B01D29/117; B01D29/118; B01D29/60; B01D29/606; B01D29/76; B01D29/86; B01D29/88; B01D29/92; B01D29/94; B01D29/945; B01D2201/00; B01D2201/28; B01D2201/282
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
207 words
A recycled paper fiber classifying mechanism comprising, in combination: a first cylindrical chamber having an inlet for receiving a mixture of acceptable fibers and reject fibers carried in a fluid suspension to be classified, said first chamber having an acceptable fiber outlet; a delivery pump connected to said first chamber inlet for delivering a flow of said fibers under pressure in a fluid suspension to said first chamber; a second chamber concentrically surrounding and in communication with said first chamber for receiving reject fibers from said first chamber, said second chamber having a reject fiber outlet; a cylindrical screen means separating said chambers and having openings of a size in the range of 0.010 to 0.090 inch to pass reject fibers; and valve means in said acceptable fiber outlet, and valve means in said reject fiber outlet, each of said valve means being variable for controlling the flow of fluid passing through each of said outlets and thereby controlling the pressure in said first and second chambers for maintaining a predetermined pressure drop across the screen means so as to control the apportionment of fluid through the screen means and through the acceptable fiber outlet and the reject fiber outlet and thereby control the classification of fibers.
Claim 2
Dependent Claim
207 words
A recycled paper fiber classifying mechanism comprising, in combination: a first cylindrical chamber having an inlet for receiving a mixture of acceptable fibers and reject fibers carried in a fluid suspension to be classified, said first chamber having an acceptable fiber outlet; a delivery pump connected to said first chamber inlet for delivering a flow of said fibers under pressure in a fluid suspension to said first chamber; a second chamber concentrically surrounding and in communication with said first chamber for receiving reject fibers from said first chamber, said second chamber having a reject fiber outlet; a cylindrical screen means separating said chambers and having openings of a size in the range of 0.010 to 0.090 inch to pass reject fibers; and valve means in said acceptable fiber outlet, and valve means in said reject fiber outlet, each of said valve means being variable for controlling the flow of fluid passing through each of said outlets and thereby controlling the pressure in said first and second chambers for maintaining a predetermined pressure drop across the screen means so as to control the apportionment of fluid through the screen means and through the acceptable fiber outlet and the reject fiber outlet and thereby control the classification of fibers.
Claim 3
Dependent Claim
37 words
A recycled paper fiber classifying mechanism constructed in accordance with claim 1 wherein said first and second chambers are positioned so that fluid flow through said chambers toward the respective outlets thereof is in a parallel direction.
Claim 4
Dependent Claim
44 words
A recycled paper fiber classifying mechanism constructed in accordance with claim 1 wherein said valve means includes a valve positioned in each of said outlets, each such valve having a controllably variable opening which is variable to proportion the flow through said screen means.
Claim 5
Dependent Claim
33 words
A recycled paper fiber classifying mechanism constructed in accordance with claim 3 including a proportional divider for controlling at least one of said valves as a function of the other of said valves.
Claim 6
Dependent Claim
88 words
A recycled paper fiber classifying mechanism constructed in accordance with claim 1, including an annular housing surrounding said first chamber; said screen means being of annular shape and substantially concentric with said housing so as to form the first chamber within said screen means, with the second chamber being positioned outwardly of said screen means; and a plurality of rotating foil means positioned within said first chamber and being movable past a surface of said screen means for agitating material collecting on said surface in said first chamber.
Claim 7
Dependent Claim
27 words
A recycled paper fiber classifying mechanism constructed in accordance with claim 1 wherein said screen means has openings of a size in the range of 0.010-0.04 inch.
Claim 8
Dependent Claim
108 words
A recycled paper fiber classifying mechanism constructed in accordance with claim 1 wherein said screen means is cylindrical in shape and said first and second chambers extend coaxially with said screen means; wherein said first chamber inlet is located at one end of said screen means; wherein said reject fiber outlet is located at an opposite end of said screen means from said first chamber inlet and said acceptable fiber outlet is located at the same end of the screen means as said reject fiber outlet so that the fiber fluid suspension flows for the full axial length of said screen means form said inlet to said outlets.
Claim 9
Independent Claim
147 words
A method of classifying recycled paper fibers comprising the steps of: directing a flow of acceptable and reject fibers under pressure by delivery pump in a fluid suspension to be classified into a first cylindrical chamber through an inlet; removing acceptable fibers through an outlet leading from the first chamber; passing reject fibers through a cylindrical screen having openings in the range of 0.010 to 0.090 inch to a second chamber concentrically surrounding the screen; removing reject fibers from an outlet leading from the second chamber; controlling the flow through the outlets from each of the chambers with valves and thereby controlling the pressure in said first and second chambers for maintaining a predetermined pressure drop across the screen and thereby controlling the apportionment of fluid flowing through the screen and through the acceptable fiber outlet and the reject fiber outlet to control the classification of fibers.
Claim 10
Independent Claim
147 words
A method of classifying recycled paper fibers comprising the steps of: directing a flow of acceptable and reject fibers under pressure by delivery pump in a fluid suspension to be classified into a first cylindrical chamber through an inlet; removing acceptable fibers through an outlet leading from the first chamber; passing reject fibers through a cylindrical screen having openings in the range of 0.010 to 0.090 inch to a second chamber concentrically surrounding the screen; removing reject fibers from an outlet leading from the second chamber; controlling the flow through the outlets from each of the chambers with valves and thereby controlling the pressure in said first and second chambers for maintaining a predetermined pressure drop across the screen and thereby controlling the apportionment of fluid flowing through the screen and through the acceptable fiber outlet and the reject fiber outlet to control the classification of fibers.
References Cited (Backward Citations)
US1825631A
Cited
US2983379A
Cited
US3074553A
Cited
US3410409A
Cited
US3616904A
Cited
US3511374A
Cited
US3647067A
Cited
US3672504A
Cited
US3874509A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-08-15 | 1981-02-14 | 1981-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-15 | 1985-02-14 | 1985-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-15 | 1989-02-14 | 1989-08-16 | $7700.00 | Window Closed / Lapsed |