Vertikale Papiermaschine

摘要

1,265,181. Papermaking. BLACK CLAWSON CO. 5 Feb., 1969 [6 Feb., 1968; 19 Feb., 1968; 8 March, 1968; 27 Aug., 1968], No. 6293/69. Heading D2A. A fibrous sheet is formed between reaches of two looped forming wires by continuously advancing substantially vertical reaches of the two wires in closely spaced relation; supporting the wires at or adjacent the upstream end in spaced relation, to define a mouth; delivering stock to the mouth, in a stream of thickness less than that of the mouth; controlling the direction of stream so that it impinges on each wire at a level downstream of the level at which the reach separates from its support member; guiding ;the wires in converging relation to force liquid through the wires, so forming a sheet, the extruded liquid being removed. As shown, wires 16 and 17 wrap breast rolls 11, 12 and couch rolls 14, 15. Stock is supplied from breast box 25, and the wires are guided by arrangements 40, past suction box 30, the sheet being carried around roll 14, and is removed by felt 32 at roll 31. Suction box 30 may be formed with its leading edge as a foil. The headbox 25 may contain a stock chamber 50 having a flow evener roll 51, a receiving chamber 56, connected by tube bank 55, and a slice outlet formed by two parallel plates. One of these plates may be movable with respect to the other, and kept parallel thereto, by a parallelogram linkage.. The fixed plate may be locally deformable. The slice lips may be interconnected with the breast rolls, so that movement of the rolls affects, proportionately, the slice opening. The guide means may be foils adjustable vertically, horizontally and rationally (Fig. 3, not shown), and are preferably arranged so that each individual means contacts a wire in a horizontal plane vertically spaced from a similar plane including the nearest means on the other wire. These means may also include channels to carry away white water. The forming zone may be slightly inclined to the vertical (Figs. 4 and 5, not shown). The speed of the wires, and the rate of flow of the stock may be adjusted to affect the product, but they are preferably arranged so that the speed of the wires and the velocity of the stock jet are the same. A single regulator bar may contact one wire between the mouth and the guide means.