Paper making system including forming fabrics and porous forming

Details Paper making system including forming fabrics and porous forming Paper making system including forming fabrics and porous forming

1975-08-25

1976-10-12

Bashore, S. Leon

Paper making and fiber liberation

Processes and products

Running or indefinite length work forming and/or treating...

162133, 162209, 162299, 162303, 162304, 162306, D21F 902, D21F 1104

Patent

active

039856127

ABSTRACT:
A paper forming machine includes at least one porous rotatable cylinder. An inner forming fabric or media in mesh form (hereinafter referred to as "inner forming media") is guided through a path around the cylinder and has a straight portion immediately before the cylinder. An outer forming fabric or media in mesh form (hereinafter referred to as "outer forming media") is guided so as to form a closing angle over the straight path of the inner forming media toward the uppermost portion of the cylinder, and is guided around a portion of the cylinder over the inner forming media and through a path in juxtaposition with the inner forming media leading away from the cylinder. Paper is formed by depositing a paper forming material slurry on the straight portion of the inner forming media which is porous so that the slurry becomes partly dehydrated and the fibers become oriented in the direction of movement. The paper forming slurry then enters into the space between the inner and outer forming media at which they close together. The slurry loses additional moisture during its travel around a portion of the cylinder at which time the slurry is compressed to remove the remaining liquid therefrom. The formed paper may be guided on the inner forming media over another cylinder which is also contacted by a conveyor fabric. The machine may also be constructed with two sets of inner and outer forming media and rotatable porous cylinders which cooperate with a conveyor fabric which moves successively into association with the respective second porous cylinders engaged by each respective inner forming media.

REFERENCES:
patent: 3201305 (1965-08-01), Webster
patent: 3432385 (1969-03-01), Thorp
patent: 3547777 (1970-12-01), De Noyer
patent: 3681193 (1972-08-01), Nykopp
patent: 3726758 (1973-04-01), Parker et al.
patent: 3752734 (1973-08-01), Notbohm
patent: 3772140 (1973-11-01), Kobayashi
patent: 3846232 (1974-11-01), Kankaanpaa

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