Apparatus for pulping and grading of waste paper

Claim 2

In an apparatus for pulping and grading of waste paper which may be admixed with matter having low specific gravity, a combination comprising a receptacle adapted to accommodate a waste paper suspension and having a peripheral wall; rotor means having an axis of rotation and located in said receptacle adjacent one portion of said wall for shredding the waste paper in said suspension so as to obtain a pulp; first outlet means in said wall in the region of said rotor means for discharge of the pulp; second outlet means in another portion of said wall opposite to said one portion and extending transversely of said axis and substantially concentric thereto for discharging of matter having low specific gravity; and a tubular sleeve provied on said rotor means substantially concentric with said axis and said second outlet means and operative for directing and centering a vortex core of suspension which is being agitated by said rotor means.

Claim 3

A combination as defined in claim 1; and further comprising screen means in said first outlet means for screening said matter of low specific gravity from the pulp being discharged.

Claim 4

A combination as defined in claim 1, wherein said rotor is of substantially flat disc-shaped configuration and has blades which are arranged in a substantially star-shaped configuration.

Claim 5

A combination as defined in claim 3, wherein said blades each have an edge which is the leading edge with reference to the direction of rotation of said rotor; and wherein the respective leading edge is provided with a raised rib.

Claim 6

In an apparatus for pulping and grading of waste paper which may be admixed with matter having low specific gravity, a combination comprising a receptacle adapted to accommodate a waste paper suspension and having a peripheral wall; rotor means having an axis of rotation and located in said receptacle adjacent one portion of said wall of shredding the waste paper in said suspension so as to obtain a pulp; first outlet means in said wall in the region of said rotor means for discharge of the pulp; second outlet means in another portion of said wall opposite to said one portion and extending transversely of said axis for discharging of matter having low specific gravity; a first sleeve provided on said rotor means substantially concentric with said axis; and a second sleeve on said other wall portion, surrounding said second outlet means and projecting into the interior of said receptacle and toward said first tubular sleeve, said first and second tubular sleeves being operative for directing and centering a vortex core of suspension which is being agitated by said rotor means.

Claim 7

In an apparatus for pulping and grading of waste paper which may be admixed with matter having low specific gravity, a combination comprising a receptacle adapted to accommodate a waste paper suspension and having a peripheral wall; rotor means having an axis of rotation and located in said receptacle adjacent one portion of said wall of shredding the waste paper in said suspension so as to obtain a pulp; first outlet means in said wall in the region of said rotor means for discharge of the pulp; second outlet means in another portion of said wall opposite to said one portion and extending transversely of said axis for discharging of matter having low specific gravity; a first sleeve provided on said rotor means substantially concentric with said axis; and a second sleeve on said other wall portion, surrounding said second outlet means and projecting into the interior of said receptacle and toward said first tubular sleeve, said first and second tubular sleeves being operative for directing and centering a vortex core of suspension which is being agitated by said rotor means.

Claim 8

In an apparatus for pulping and grading of waste paper, a combination comprising a receptacle for receiving 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 the pulp from said receptacle; second outlet means provided in the other of said end walls for discharge from said receptacle of matter having low specific gravity and which is in the form of a suspension; and means for centering the core of a vortex generated by said rotor means and including at least one tubular sleeve provided on said rotor coaxially therewith.

Claim 9

In an apparatus for pulping and grading of waste paper, a combination comprising a receptacle for receiving 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 the pulp from said receptacle; second outlet means provided in the other of said end walls for discharge from said receptacle of matter having low specific gravity and which is in the form of a suspension; and means for centering the core of a vortex generated by said rotor means and including at least one tubular sleeve provided on said rotor coaxially therewith.

Claim 10

A combination as defined in claim 6, wherein said second outlet means is coaxial with said rotar means; and wherein said means for centering the core of a vortex includes an additional sleeve on said other end wall, surrounding said second outlet means in the interior of said receptacle.