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Abstract

Apparatus for continuously manufacturing chip-and fiber-board webs having uniform thickness across their width in a press comprising a centrally disposed press cylinder journalled to rotate in bearings in uprights and at least one pressure roller disposed adjacent to periphery of the press cylinder. An endless steel band which carries the material for forming the web and which is subjected to tensile stress, is guided around the press cylinder and through the nip defined between the press cylinder and the pressure roller. The material is then pressed between the endless steel band and the surface of the press cylinder. The pressure roller is journalled for rotation in bearing bodies at each of its ends, with the bearing bodies being connected to piston and cylinder arrangements. When the press is in its loaded state, the bearing body at one end of the pressure roller is displaced by the application of a preselected pressure towards the axis of rotation of the press cylinder. The spacing between the external surface of the press cylinder and that of the pressure roller is measured at this end of the roller. On the basis of the distance measured at this end, the same spacing is set at the other end of the pressure roller by adjusting the bearing body at that end. By input to a microprocessor, it is possible to preselect specific gap sizes at the pressure rollers to produce a specific thickness of board, with the pressure rollers then being held exactly parallel.

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First Claim