US3989197A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for pulping and grading of waste paper
Assignee: JM Voith GmbH
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Filing: 1975-01-13
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Granted: 1976-11-02
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Expires: 1995-01-13
Abstract
Abstract A receptacle accommodates a waste paper suspension and a rotor located adjacent one portion of the receptacle wall. A first outlet is provided in the wall in the region of the rotor so that pulp produced by shredding of waste paper by the rotor can be discharged from the receptacle. A strainer is interposed in the first outlet, and a second outlet is provided in an opposite portion of the wall and arranged to discharge matter having low specific gravity from the receptacle.
Inventors
- 👤 Walter Neitzel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:30
CPC Classifications
D; D21; D21B; D21B1/00; D21B1/04; D21B1/12; D21B1/30; D21B1/32; D21B1/34; D21B1/345; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/64
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
205 words
In an apparatus for the comminution and grading of waste material, particularly for the pulping and grading of waste paper, a combination comprising at least the closed pressurized receptacle for receiving a waste material suspension, said receptacle having wall means including a peripheral wall and two oppositely located end walls; rotor means located in said receptacle adjacent one of said end walls for comminuting the waste material in said suspension so as to obtain a stock component, an impurity component of low specific gravity which is in the form of a suspension and an impurity component of high specific gravity; first outlet means provided in said wall means in the region of said rotor means for discharge of said stock component from said receptacle; strainer means for straining of the stock component discharged through said first outlet means; second outlet means provided in the other of said end walls for discharge from said receptacle of said impurity component of low specific of low specific gravity; means for regulating the discharge of said impurity component of low specific gravity through said second outlet means; and third outlet means provided in said wall means for discharge from said receptacle of said impurity component of high specific gravity.
Claim 2
Dependent Claim
205 words
In an apparatus for the comminution and grading of waste material, particularly for the pulping and grading of waste paper, a combination comprising at least the closed pressurized receptacle for receiving a waste material suspension, said receptacle having wall means including a peripheral wall and two oppositely located end walls; rotor means located in said receptacle adjacent one of said end walls for comminuting the waste material in said suspension so as to obtain a stock component, an impurity component of low specific gravity which is in the form of a suspension and an impurity component of high specific gravity; first outlet means provided in said wall means in the region of said rotor means for discharge of said stock component from said receptacle; strainer means for straining of the stock component discharged through said first outlet means; second outlet means provided in the other of said end walls for discharge from said receptacle of said impurity component of low specific of low specific gravity; means for regulating the discharge of said impurity component of low specific gravity through said second outlet means; and third outlet means provided in said wall means for discharge from said receptacle of said impurity component of high specific gravity.
Claim 3
Dependent Claim
19 words
A combintion as defined in claim 1, wherein said first and second outlet means each include an outlet duct.
Claim 4
Dependent Claim
14 words
A combination as defined in claim 1, wherein said regulating means comprises valve means.
Claim 5
Dependent Claim
14 words
A combination as defined in claim 1, wherein saiid regulating means comprises pump means.
Claim 6
Dependent Claim
26 words
A combination as defined in claim 1, and further comprising a recess in said wall means for accumulation of said impurity component of high specific gravity.
Claim 7
Dependent Claim
38 words
A combination as defined in claim 5, said rotor means including a rotor which is rotatable about an axis of rotation; and wherein said recess is of substantially annular configuration and is substantially coaxially arranged with said rotor.
Claim 8
Dependent Claim
18 words
A combination as defined in claim 1; and further comprising discharging means connected with said second outlet means.
Claim 9
Dependent Claim
15 words
A combination as defined in claim 7, wherein said discharging means comprises a gravity tube.
Claim 10
Dependent Claim
14 words
A combination as defined in claim 7, wherein said discharging means comprises suction means.
Claim 11
Dependent Claim
39 words
A combination as defined in claim 1, said rotor means including a rotor which is rotatable about an axis of rotation; and wherein said second outlet means is located substantially on a direct line with said axis of rotation.
Claim 12
Dependent Claim
32 words
A combination as defined in claim 1, said rotor means creating in said suspension a vortex flow having a core region; and wherein said other end wall extends across said core region.
Claim 13
Dependent Claim
29 words
A combination as defined in claim 11, wherein said rotor means and said other end wall are arranged so that said vortex flow extends to said other end wall.
Claim 14
Dependent Claim
46 words
A combination as defined in claim 11, said rotor means including a rotor which is rotatable about an axis of rotation, and said core region extending axially of said rotor; and wherein said second outlet means and said core region at least partially overlap one another.
Claim 15
Dependent Claim
28 words
A combination as defined in claim 1; and further comprising additional regulating means for regulating the discharge of said impurity component of high specific gravity from said receptacle.
Claim 16
Dependent Claim
27 words
A combination as defined in claim 1, wherein said receptacle is of closed construction so as to permit the development of an internal overpressure in said receptacle.
Claim 17
Dependent Claim
61 words
A combination as defined in claim 1; further comprising an additional receptacle connected in series with said one receptacle, said additional receptacle having an inlet for said waste material; and at least one rotatable member in said additional receptacle for comminuting said waste material, said rotatable member initially comminuting said waste material and said rotor means further comminuting said waste material.
Claim 18
Dependent Claim
30 words
A combination as defined in claim 16; and further comprising at least one strainer for straining the initially comminuted waste material prior to further comminution thereof by said rotor means.
Claim 19
Dependent Claim
19 words
A combination as defined in claim 17, wherein said one strainer is of coarser mesh than said strainer means.
Claim 20
Dependent Claim
44 words
A combination as defined in claim 16, said rotatable member causing the formation of at least one elongated rope-like wad during the initial comminution of waste; and further comprising additional outlet means in said additional receptacle for withdrawal of said wad from the latter.
Claim 21
Dependent Claim
20 words
A combination as defined in claim 19; and further comprising withdrawing means for withdrawing said wad from said additional receptacle.
Claim 22
Dependent Claim
55 words
A combination as defined in claim 19, said additional receptacle having additional wall means including an additional peripheral wall and two oppositely located additional end walls; and wherein said rotatable member is arranged adjacent one of said additional end walls and said additional outlet means is provided in the other of said additional end walls.
Claim 23
Dependent Claim
35 words
A combination as defined in claim 16, wherein additional outlet means for discharge of the initially comminuted waste material from said additional receptacle is provided in the latter in the region of said rotatable member.
Claim 24
Dependent Claim
45 words
A combination as defined in claim 16, wherein an initial impurity component of high specific gravity is obtained during the initial comminution of said waste material; and further comprising additional outlet means in said receptacle for discharge of said initial impurity component from the latter.
Claim 25
Dependent Claim
26 words
A combination as defined in claim 23; and further comprising additional regulating means for regulating the discharge of said initial impurity component from said additional receptacle.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-11-02 | 1980-05-03 | 1980-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-11-02 | 1984-05-03 | 1984-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-11-02 | 1988-05-03 | 1988-11-02 | $7700.00 | Window Closed / Lapsed |