US1821454A - Woven-wire belt for paper-making machines - Google Patents

Description

Sept. 1, 1931 N. w. WEBB 1,821,454

WOVEN WIRE BELT FOR PAPER MAKING MACHINES Filed Dec. 12, 1929 I INVENTOR. NEL50NNNEBB. %M; ATTORNEY.

Patented Sept. 1, 1931 UNITED STATES PATENT OFFICE NELSON W. WEBB, OF IBELLEVILLE, NEW JERSEY, AS SIGNOR TO EASTWOOD WIRE CORPORATION, OF BELLEVILLE, NEW JERSEY, A CORPORATION OF NEW JERSEY WOVEN-WIRE BELT ron PAPER-MAKING MACHINES Application filed December 12, 1929. Serial No. 413,574.-

The present invention relates to woven wire belts, particularly for paper-making machines of the Fourdrinier type, and has for an object to provide an improved seam structure for wire of the so-called twill weave type, and as disclosed in the patent to Kufierath, #617,581 dated January 10,

1899, it being proposed in the present inventlon to so arrange lacingwires as t0 1Q closely approximate the structure of the body of the wire as to strength, flexibility and porosity, and also to provlde a seam which will be practicable and economical to produce.

Another object is to provide lacing wires in such relation to the knuckles of the wire mesh that there will be no projection of the lacing wires, and the latter will therefore be protected against excessive Wear 29 and breakage through engagement with the suction boxes over which the wire passes. A further object is to provide a seam in which lacing wires are looped about the end weft wires, which are integrally connected to the warp wire ends in such manner that the lacing wires need not be carried back into the body of the wire mesh, or combined with whipping wires, such as have heretofore been employed, to retain the end weft wires against pulling out or displacement.

In sewing the lacing wires relatively short pieces must be employed to enable the person doing the work to thread the lacing wire through the wire mesh without difficulty, and the ends of such short pieces are tled into the mesh, at the point where one piece ends and the next starts. Under great strain these ties are apt to loosen, and it is a further object of the invention to provide a scam in which the lacing wires are so arranged as to reinforce the ties. To this end it is proposed to provide a plurality of lacing wires arranged in such relation that the ties of one mm are between the ties of another wire, so that each tie point is reinforced by an' unbroken intermediate portion of a lacing wire.

A With the above and other objects in view, an embodiment of the i vention is shown in the accompanying drawings, and this embodiment will be hereinafter more fully described with reference thereto, and the invention will be finally pointed out in the claims.

In the drawings:

Fig. 1 is an enlarged plan view of the upper side of a belt at the seam, with portions broken away;

Fig. 2 is a similar view of the under side, the lower portion shown in Fig. 1 not being shown; and i Fig. 3 is a sectional view taken along the line 3-3 of Fig. 1.

Similar reference characters indicate corresponding parts throughout the several figures of the drawings.

Referring to the drawings, Fig. 1 shows, greatly enlarged a portion of the two ends of the wire cloth which are seamed together to form a belt, sections of the wire between the three lacing wire ties illustrated being broken away for clearness. The portlon as shown, and with the broken away portions replaced, represents a piece of the belt which in its actual size is about 2 inches long, there being about warp wires to the inch. The wire cloth consists of warp wires 10 and weft wires 11 of brass, bronze or other suitable material for the purpose.

The particular type of weave illustrated is known as twill weave, and in which the warp wires 10 are carried over one and under two of the weft wires, while the weft wires 11 are carried over two and under one of the warp wires. Obviously the warp ends have different relations to the end weft wire, certain of them being carried over it and under the next weft wire, others beingunder it and over the next weft wire, and still others being carried under it and also under the next weft wire, so that therev is a greater tendency for these latter to spread and permit pulling and displacement of the end weft wire under strain. In order to prevent this it has been the practice to provide a, whipping wire about the end weft wires, and also to carry the lacing wire loodps about weft wires removed from the en I propose to obviate this, and at the same time enable the lacing wires to be carried about the end weft wires, and to this end I preferably employ an end weft wire of the type disclosed in my Patent No. 1,747,274, granted February 18, 1930, and which consists of a solder coated wire 12 of elongated cross-section inserted between the warp wire ends in substitution of a removed weft wire. The solder coated wire is joined to the warp wire ends by the application of heat, which causes the solder to flow to the warp wire ends to integrally join and truss them, the interstices between the wires being at the same time maintained uniformly free of lumpy spots, because of the capillary flow of the metal away from them. These integrally joined end weft wires of elongated cross-section are particularly suited to twill weave wire, because of the relatively long junction point with the warp wire ends, whichstiffens the loose warp ends against bowing or bending away from the belt surface, and the secure connection of these ends to the end weft wire.

The seam is now completed by sewing the lacing wires about the two butted ends of wire cloth, the lacing wires being preferably of slightly smaller diameter than the warp and weft wires 10 and 11, so that they will not project beyond the surface of the belt.

Two lacing wires 13 and 14 are employed, the lacing wire 13 being carried about the end weft wire 12 at the left, Fig. 1, downwardly through the opening between an overlying warp wire end and the adjacent underlying warp wire end below it, across the seam opening at the under side, and about the end weft wire 12 at the right upwardly through the opening between the two adjacent underlying warp wire ends, and then across the seam opening at the upper side, and continued in the same manner throughout the length of the seam.

The lacing wire 14 which may be sewed in by a second operator working right behind the first operator, is in substantially parallel and spaced relation to the wire 13, being carried about the end weft wire at the left, Fig. 1, downwardly through the opening between the two adjacent underlying warp wire ends. across the seam opening at the under side, and about the end weft wire 12 at the right upwardly through the opening between the overlying warp wire end and the next adjacent underlying warp wire end.

As it is necessary to use relatively short pieces of wire to permit the sewing to be done conveniently. and without producing kinks. the wires must be tied at their ends. The ties of the wire 13 are indicated at 1 and the ties of the wire 14 at 16, the same being alternately arranged, so that the ties 16 are at points substantially midway between the ties 15, while the ties 15 are at points substantially midway between the ties 16. The ties are produced by looping the end of the wire about one of the weft wires removed from the end and at one side of the seam, and looping the starting end of a new piece of wire about one of the weft wires removed from the -end and at the other side of the seam, and then continuing the sewing with the new piece of wire in continuation of the sewed-in piece of lacing wire. It will be understood of course that other forms of ties may be employed.

By this alternate arrangement of the ties the same are reinforced against pulling strains, and the lacing wires present a continuous unbroken lacing at every point throughout the seam, and any tendency to pull out or loosen at the tie points is prevented.

The provision of the two lacing wires, both carried about the integrally connected endweft wires, provides a seam for twill weave wire mesh of great strength, and having the desirable features of porosity, flexibility and structural afiinity with the body of the wire mesh. The arrangement of the lacing wires is such that at no point do they extend over the warp wire ends, but are carried between them so that there are no projecting portions that might be cut off, or subjected to excessive wear, through contact with the suction boxes. The

freedom of the seam from whipping wires,

and lacing wires carried back into the body of the wire mesh about weft wires removed from the ends, assures a firm, uniform, narrow seam which will not produce objectionable marking on the paper or cause accumulation or piling up of pulp at the seam.

I have illustrated and described a preferred and satisfactory embodiment of the invention, but it will be obvious that changes may be made therein, within the spirit and scope thereof as defined in the appended claims.

Having thus des ribed my. invention what I claim and desire to secure by Letters Patent is 1. In a wire cloth belt, a length of woven wire cloth comprising warp wires and weft wires, the warp wires having portions extending under a plurality of weft wires at one side. said length of cloth having its ends adjacent. and a plurality of lacing wires carried about the end weft wire at each end of the cloth and extending between said ends, said lacing wires being carried through adjacent interstices and skipping one interstice at each end of the cloth.

2. In a wire cloth belt, a length of woven wire cloth compr sing warp wires and weft adjacent, and a plurality of lacing wires carried about the end weft wire at each end of the cloth and extending between said ends, one of said lacing wires being carried through interstices at one end of the cloth between two adjacent warp wire ends disposed at the same side of the end weft wire.

3. In a wire cloth belt, a length of woven wire cloth comprising warp wires and weft wires, the warp wires having portions extending under a plurality of weft wires at one side, said length of cloth having its ends adj agent, and a plurality of lacing wires carried about the end weft wire at each end of the cloth and extending between said ends, one of said lacing wires being carried through interstices at one end of the belt between two adjacent warf wire ends disposed at the same side of the end weft wire, the other lacing wire being carried through interstices at the other end of the cloth between two adjacent warp wire ends disposed at the same side of the end weft wire.

4. In a wire cloth belt, a length of woven wire cloth comprising warp wires and weft wires and having its ends adjacent, and a seam comprising a plurality of lacing wires carried about weft wires and extending between said ends, each of said'lacing wires comprising a plurality of sections having ties at their ends, the ties of one wire being disposed at points intermediate the ties of the other wire.

Signed at Belleville, county of Essex, and State of New Jersey, this letday of November, 1929.

NELSON W. WEBB.

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