Apparatus for screening fibrous stock
OwnerW. Thomas Gauldinventor
Life of this patent
Estimating the term…
Abstract
Baffles are added to the blade members of the rotor of an apparatus for screening fibrous stock to cause the flow of stock within the screening zone along the length of the blades to angle away from the blades rather than parallel with the blades. Passageways are added to allow untreated stock to be added at points deep within the screening zone to maintain a proper water to fiber ratio throughout the screening zone.
Claims4
An improved apparatus for screening fibrous stock of the type including a hollow housing member having an inlet port for allowing fibrous stock to be introduced into the interior thereof and having an outlet port for allowing screened fibrous stock to be discharged therefrom;
- a cylindrical, open ended screen member positioned within said housing member;
- said housing member including structure means for fixedly mounting said screen member within said housing member and for isolating the outer side of said screen member to divide the interior of said housing member into a first chamber and a second chamber with the boundary between said first and second chambers defined in part by said screen member, said inlet port communicating directly with said first chamber and said outlet port communicating directly with said second chamber;
- a rotatable shaft member located substantially along the longitudinal axis of said screen member;
- a rotor means for causing fibrous stock within said first chamber to pass through said screen member into said second chamber and out said outlet port, said rotor means including a cylindrical body member fixedly attached to said shaft member for rotation therewith and including a plurality of blade members attached to and spaced substantially evenly about the circumference of said body member and radiating outwardly therefrom, each of said blade members having a leading side and a trailing side and having an outer side joining said leading and trailing sides, said body member having a substantially closed first end and a second end and a side wall, said blade members extending between said first and second ends of said body member;
- wherein the improvement comprises:
- a plurality of passageway means in said body member for allowing a portion of the fibrous stock entering said inlet port to pass from said first end of said body member to a point between said first and second ends of said body member, the combined cross-sectional area of said passageway means being greatly less than the cross-sectional area of said first end of said body member.
Dependencies are inferred from the claim text.