Abstract: A paper forming device of a paper machine enables a change-over between a thin paper high velocity forming and a thick paper forming. In the paper forming device, stock liquor S is discharged from a headbox 1 onto a wire 2 and, while being transferred on the wire 2, is dewatered by a dewatering equipment and further by a suction box 6. A forming roll 13, wound with an extended felt 7, is arranged movably up and down above the wire 2 near the headbox 1. When a thin paper is to be formed, the forming roll 13 is moved down so that a nip of the stock liquor is formed between the wire 2 and the felt 7. Thereby, the stock liquor S discharged from the headbox 1, can be comparatively immediately nipped between the wire 2 and the felt 7.

Abstract: An improved multi-layer paper sheet forming system is disclosed, in which a degree of dispersion of fibers under the condition where a paper layer has been formed is large, thereby formation of a paper sheet is improved, moreover, bases of short wire cloth sections can be installed at the same level as a building floor and a complicated base of the shape of steps is not necessitated. The system comprises one endless felt loop and a plurality of short wire cloth sections disposed on the endless felt and provided with a dewatering instrument having, as dewatering elements, forming blades consisting of two zones, that is, a flat front half and a curved rear half. The short wire cloth section includes a forming roll having a large diameter and a breast roll having a small diameter, and the plurality of short wire cloth sections are disposed substantially at the same level.

Abstract: Apparatus for forming multilayered paper includes an endless loop of felt and at least two short wire units provided beneath the loop of felt. Each short wire unit has a fixed dehydrator having a forming shoe, at least part of the upper surface of which is curved, and a short wire traveling over the curved part of the upper surface of the forming shoe. The endless loop of felt is engaged with the short wire on the curved upper surfaces of the forming shoes of the fixed dehydrators. Stock is ejected from a head box onto each short wire unit and is moved between the endless loop of felt and the short wire of the unit where the stock is dehydrated to thereby form a paper layer. Each of a forming roll and a couch roll guiding the felt into engagement with the short wire, and a felt roll disposed beneath the felt downstream of the short wire unit, can be moved vertically.