US1782281A - Cylinder mold of paper-making machines - Google Patents

Description

Nov. 18, 1930. 1-. YONEKURA CYLINDER MOLD OF PAPER MAKING MACHINES Filed Feb. 23, 1929 Patented Nov. 18, 1930 UNITED STATES PATENT OFFICE,

CYLINDER MOLD OF PAPER-MAKING- MACHINES Application filed February 23, 1929, Serial No. 342,179, and in Japan September 18, 1928.

This invention relates to an improvement in cylinder molds of paper-making machines and has, for its object the prevention of water from being stirred up in the cylinder of paper-making machines by reducing resistance of the body of cylinder to the minimum.

The device. invented is characterized in that a flow of water which makes the raw material stick to the net is produced by utilizing a small difference in the level of water between that of the fluid raw material for paper in the stuff tank and that of the water contained in the cylinder and runs in the direction of the interior of cylinder from its exterior and further in that the said water after running through the net enters into a circular chamber having'a series of waterpassages and slowly and evenly flows into the cylinder, at the same time reducing the resistance of cylinder and preventing the stir as already mentioned. Furthermore, the device is so arranged that water contained in the wet paper sticking to the surface of net is absorbed as much as possible by capillary action into the circular chamber in its course of running out the stuff-tank and reaching the couch roll which is situated above the tank, the water thus absorbed after remaining in the chamber enters into the cylinder evenly and drop by drop through the waterpassages, by means of which the stir of water in the cylinder is prevented. Lastly, it is to be added as a feature of this invention that the sectional face of the spiders used for this device is made in the'form of a flat diamond which has the advantage of reducing the resistance of water and of scooping the water out of the cylinder.

The annexed drawings illustrate the operation of the improved cylinder mold ,in

chambers by means of holes made at the roots of flanges as above described; or the channels 6 may be made in zigzag lines along the whole length of the wall of the cylinder.

These and any other such modifications may of course be made according to the facility of draining of water, weight and the strength of the materials and their inter-relations.

Reverting to the water channel (4), it is so shaped that the water flowing in from circular chamber is easily led to drain. ofi or to flow into the cylinder without disturbing the water which stands therein (Figs. 1 and 2 are referred to) and further that when the projecting flanges rotate in the water, the stirring up orsplashing of water against the wall of the channel or the resistance directed against the reverse side of net which receives liquid pulp is entirely avoided or at least minimized.

The cylinder has at each of its both ends a circular brim-piece (13) fixed and the spid-' 1 ers (7 between the body of wheel (5) and the said brim-piece have their sections made in diamond shape. The acute points of the diamonds point in direction of cylinders vented. Figs. 1 and 2 arethe left half of the rotation by which the resistance of radial mold in vertical, and horizontal sections'respectively. Fig. 3 shows in an enlarged section, the bands from which their teeth project, Figs, 4 to 8 show the modified types of the cylinder mold in partsand in sections. Jhe same number designates the same part throughout all the drawings.

To illustrate by the drawings, a cylinder 50 (1) is provided, around its periphery is a supports in Water is reduced to a great advantage. Over and between the projecting rings (8) of brim-pieces fixed at the end of the cylinder, a sheet of net-work or a square frame wattled with wooden or other bars is stretched close over the top of projecting flanges and stufling boxes are provided for the said brim-pieces.

Fig. (4) shows the construction of a cylinder 1) made of detachable or divisible members so that a cylinder can conveniently be made to any desired length. For this purpose, flange is provided at the end of confronting members (1) and (1) which are fastened by fixing the both flanges with bolts. Fig. 5 shows another method of constructing detachable members into one complete cylinder by cutting away the bulge of the said flange at its one end in order to form a circular chamber (11) the inner diameter of which is greater than that of cylinder, by providing, at its other end a circular sharply bulging flange (12) which has the outer diameter corresponding with the inner diameter of the said chamber by press ing the said sharply bulging out flanges into the circular chamber and by thus fixing or connecting the members. Fig. (6), shows the cylinder provided with spiders at its two ends which is done by having a circular chamber (11) on the outside end of cylinder cut away and providing the circular brim-piece with a circular sharply bulging-out flange (12) on its inner face, and pressing into the said circular chamber (11) the circular sharply bulging flange of the cylinder, the outer diameter of which is to correspond with the inner diameter of the said circular chamber.

Figs. 7 and 8 show the cylinder having a number of oblong plates (14), around its periphery, the ends of which plates, when seen in a section, are diamond-shaped and arranged with their axial lines in parallel over the cylinder and with suitable distance kept between them. The said plates are fixed toether, at their two ends, with rim-rings %15). Further, the cylinder is shown, distributed in the axial line of the cylinder with a number of flattened rings (16) which are fixed to the said plates by welding.

Claim: I

In a cylinder mold for paper making machines, a cylinder having a plurality of spaced annular flanges on its periphery defining liquid passageways, the periphery of the cylinder being perforated for the entrance and exit of liquid, certain of the flanges having openings therein which are bevelled from the outer faces of such flanges and communicate with two adjacent perforations.

In testimony whereof I have signed my name to this specification.

TARIO YONEKURA.

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