Apparatus for pulping and grading of waste paper

Claim 2

In an apparatus for the comminution and grading of waste material, particularly for the pulping and grading of waste paper, a combination comprising container means for accommodating a suspension of waste material; means for comminuting at least part of said waste material in said container means so as to obtain an impurity component of low specific gravity, a stock component and an additional component of high specific gravity, said comminuting means causing accumulation of said impurity component in a portion of said container means spaced from said comminuting means; outlet means for discharge of said stock component from said container means; discharging means in the region of said portion for discharging said impurity component from said container means; a substantially annular recess in said container means for accumulation of said additional component; and additional outlet means communicating with said recess for removal of said additional component therefrom.

Claim 3

A combination as defined in claim 1, wherein said comminuting means comprises rotor means.

Claim 4

A combination as defined in claim 1, wherein said outlet means is located in the region of said comminuting means.

Claim 5

A combination as defined in claim 1; and further comprising strainer means for straining the stock component discharged through said outlet means.

Claim 6

A combination as defined in claim 1, wherein said outlet means and said discharging means each include an outlet duct.

Claim 7

In an apparatus for the comminution and grading of waste material, particularly for the pulping and grading of waste paper, a combination comprising container means for accommodating a suspension of waste material; means for comminuting at least part of said waste material in said container means so as to obtain an impurity component of low specific gravity and a stock component, said comminuting means causing accumulation of said impurity component in a portion of said container means spaced from said comminuting means; outlet means for discharge of said stock component from said container means; and discharging means in the region of said portion for discharging said impurity component from said container means, said discharging means comprising suction means.

Claim 8

In an apparatus for the comminution and grading of waste material, particularly for the pulping and grading of waste paper, a combination comprising container means for accommodating a suspension of waste material; means for comminuting at least part of said waste material in said container means so as to obtain an impurity component of low specific gravity and a stock component, said comminuting means causing accumulation of said impurity component in a portion of said container means spaced from said comminuting means; outlet means for discharge of said stock component from said container means; and discharging means in the region of said portion for discharging said impurity component from said container means, said discharging means comprising suction means.

Claim 9

A combination as defined in claim 1, wherein said discharging means comprises a pump.

Claim 10

A combination as defined in claim 1, wherein said discharging means comprises a gravity tube.

Claim 11

A combination as defined in claim 1, said comminuting means being effective for creating in said suspension a vortex flow having a core region; and wherein said portion of said container means extends across said core region.

Claim 12

In an apparatus for the comminution and grading of waste material, particularly for the pulping and grading of waste paper, a combination comprising container means for accommodating a suspension of waste material; means for comminuting at least part of said waste material in said container means so as to obtain an impurity component of low specific gravity and a stock component, said comminuting means causing accumulation of said impurity component in a portion of said container means spaced from said comminuting means; outlet means for discharge of said stock component from said container means; discharging means in the region of said portion for discharging said impurity component from said container means, said discharging means, said outlet means, said comminuting means and said container means together defining a first unit; and an additional unit arranged in series with said first unit, one of said units initially comminuting said waste material so as to obtain an initial stock component, and the other of said units further comminuting at least said initial stock component.

Claim 13

In an apparatus for the comminution and grading of waste material, particularly for the pulping and grading of waste paper, a combination comprising container means for accommodating a suspension of waste material; means for comminuting at least part of said waste material in said container means so as to obtain an impurity component of low specific gravity and a stock component, said comminuting means causing accumulation of said impurity component in a portion of said container means spaced from said comminuting means; outlet means for discharge of said stock component from said container means; discharging means in the region of said portion for discharging said impurity component from said container means, said discharging means, said outlet means, said comminuting means and said container means together defining a first unit; and an additional unit arranged in series with said first unit, one of said units initially comminuting said waste material so as to obtain an initial stock component, and the other of said units further comminuting at least said initial stock component.

Claim 14

In an apparatus for the comminution and grading of waste material, particularly for the pulping and grading of waste paper, a combination comprising container means for accommodating a suspension of waste material; means for comminuting at least part of said waste material in said container means so as to obtain an impurity component of low specific gravity, a stock component and impurity components which become entangled so as to form elongated rope-like wads, said comminuting means causing accumulation of said impurity compounds of low specific gravity in a portion of said container means spaced from said comminuting means; outlet means for discharge of said stock component from said container means; discharging means in the region of said portion for discharging said impurity component of low specific gravity from said container means; and an outlet in the region of said portion for withdrawal of said wads from said container means.

Claim 15

In an apparatus for the comminution and grading of waste material, particularly for the pulping and grading of waste paper, a combination comprising container means for accommodating a suspension of waste material; means for comminuting at least part of said waste material in said container means so as to obtain an impurity component of low specific gravity, a stock component and impurity components which become entangled so as to form elongated rope-like wads, said comminuting means causing accumulation of said impurity compounds of low specific gravity in a portion of said container means spaced from said comminuting means; outlet means for discharge of said stock component from said container means; discharging means in the region of said portion for discharging said impurity component of low specific gravity from said container means; and an outlet in the region of said portion for withdrawal of said wads from said container means.

Claim 16

A combination as defined in claim 11; and further comprising withdrawing means for withdrawing said wads from said container means.

Claim 17

In an apparatus for pulping and grading of waste paper, a combination comprising a receptacle for accommodating a waste paper 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 shredding the waste paper in said suspension so as to obtain a pulp; said rotor means having an axis of rotation; first outlet means provided in said wall means in the region of said rotor means for discharge of pulp from said receptacle; strainer means for straining of pulp discharged through said first outlet means; second outlet means provided in the other of said end walls for discharge from said receptacle of matter having low specific gravity; an annular recess provied in an inner surface of said peripheral wall coaxial with said axis of rotation for accumulation of matter having high specific gravity; and third outlet means communicating with said recess for removal of accumulated matter therefrom.

Claim 18

In an apparatus for pulping and grading of waste paper, a combination comprising a receptacle for accommodating a waste paper 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 shredding the waste paper in said suspension so as to obtain a pulp; said rotor means having an axis of rotation; first outlet means provided in said wall means in the region of said rotor means for discharge of pulp from said receptacle; strainer means for straining of pulp discharged through said first outlet means; second outlet means provided in the other of said end walls for discharge from said receptacle of matter having low specific gravity; an annular recess provied in an inner surface of said peripheral wall coaxial with said axis of rotation for accumulation of matter having high specific gravity; and third outlet means communicating with said recess for removal of accumulated matter therefrom.

Claim 19

In an apparatus for pulping and grading of waste paper, a combination comprising a receptacle for accommodating a waste paper 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 shredding the waste paper in said suspension so as to obtain a pulp; first outlet means provided in said wall means in the region of said rotor means for discharge of pulp from said receptacle; first strainer means for straining of the pulp discharged through said first outlet means; an outlet provided in the other of said end walls for withdrawal of tangled suspension components in form of elongated rope-like wads; withdrawing means for withdrawing said wads through said outlet; an additional receptacle having additional wall means including an additional peripheral wall and two oppositely located additional end walls, said additional receptacle also having an inlet communicating with said first outlet means; additional rotor means located in said additional receptacle adjacent one of said additional end walls; additional first outlet means provided in said additional wall means in the region of said additional rotor means for discharge of pulp from said additional receptacle; second strainer means similar to said first strainer means; and second outlet means provided in the other of said additional end walls for discharge from said additional receptacle of matter having low specific gravity.

Claim 20

In an apparatus for pulping and grading of waste paper, a combination comprising a receptacle for accommodating a waste paper 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 shredding the waste paper in said suspension so as to obtain a pulp; first outlet means provided in said wall means in the region of said rotor means for discharge of pulp from said receptacle; first strainer means for straining of the pulp discharged through said first outlet means; an outlet provided in the other of said end walls for withdrawal of tangled suspension components in form of elongated rope-like wads; withdrawing means for withdrawing said wads through said outlet; an additional receptacle having additional wall means including an additional peripheral wall and two oppositely located additional end walls, said additional receptacle also having an inlet communicating with said first outlet means; additional rotor means located in said additional receptacle adjacent one of said additional end walls; additional first outlet means provided in said additional wall means in the region of said additional rotor means for discharge of pulp from said additional receptacle; second strainer means similar to said first strainer means; and second outlet means provided in the other of said additional end walls for discharge from said additional receptacle of matter having low specific gravity.

Claim 21

A combination as defined in claim 2, said container means having a peripheral wall and two oppositely located end walls; and wherein said rotor means comprises a rotor located in said container means adjacent one of said end walls, said discharging means being provided at the other of said end walls.

Claim 22

A combination as defined in claim 1, said comminuting means producing an additional component of high specific gravity during comminution of said waste material; and further comprising additional outlet means for removal of said additional component from said container means.

Claim 23

A combination as defined in claim 1, said comminuting means being rotatable about an axis of rotation; and wherein said discharging means is located in a direct line with said axis of rotation.