Method for producing chip- and fiber-board webs of uniform thickness

A method of continuously manufacturing chip and fiberboard webs, having a substantially uniform thickness across their entire width, in a press comprising a press cylinder, journalling means rotatably mounting said cylinder, and upright support means accommodating said journalling means, said cylinder including an external curved surface, at least one pressure roller disposed adjacent said external curved surface of said press cylinder, said pressure roller having an external curved surface which jointly defines with said external curved surface of said press cylinder a pressing nip, said pressure roller further including first and second end regions, bearing body means disposed at each of said first and second end regions and mounting said pressure roller for rotation, an endless steel band disposed around said curved surface of said cylinder and passing through said pressing nip for carrying chips or fibers, and means for tensioning said band, comprising the steps of;

• a) mixing a chip or fiber layer with a binding agent,
• b) conveying said mixed layer on said band to said pressing nip whereby said layer is subjected to a surface pressure between said band and said curved surface of said cylinder and to a line pressure in said pressing nip,
• c) applying a preselected pressure to said bearing body provided at said first end of said pressure roller when said press is in its loaded state to cause displacement of said pressure roller towards said axis of rotation of said press cylinder,
• d) measuring said spacing between said external surface of said press cylinder and said external surface of said pressure roller at said first end of said pressure roller at said preselected pressure and, on the basis of said measured spacing,
• e) setting an equal spacing between said external surface of said press cylinder and said external surface of the pressure roller at said second end of said pressure roller by displacing said bearing body associated with said second end of said pressure roller.