US1581655A - Paper-making machine - Google Patents

Description

April 20, 1926. 1 1,5s1g655.

F. W. MONAG HAN PAPER MAKING MACHI NE Filed Jan. 14, 1921 .C ifi.

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Patented Apr. zo, 192s.

1,581,655" UNITED STATES PATENT o-Frica.

FRANK W. MONAGHAN, OF. WATERTOWN, IAYORK, ASSIGNOR T0 THE4 BAGLEY AND SEWALL COMPANY, A CORPORATION 0F NEW YORK.

PAPER-MAKING MACHINE.

Applicants mea January? 14, 1921. serai No. 437,150.

To all whom z't may concern:

Be it known that I, FRANK W. MONAGHAN, v

a citizen of the United States, residing at Watertown, county of Jeerson, and State of New York, have invented certain new and useful Improvements in Paper-Making Machines, fully described and re resented inv the following specification an the accompanying drawings, forming a part of the same. This invention relates .to certain "improvements in paper making machines.

In a co-pending application Serial No. L137,151 I have disclosed a process or method for producing continuously a web or sheet of paper at speeds greater than the s eed at which paper has been made by metho heretofore known or practiced. Such method or process disclosed in the application aforesaid, consists broadly in the formation and maintenance of a pool or reservoir above the wire in, to and through which the water and stock is caused to move at approximately the speed of the making wire, with a itation and intermingling of the bers o the same will be given in connection. with lthe accompanying drawings, in which Figure 1 is a partial diagrammatic slde elevation of the wet end of aFourdrinier machine, showing the Wire and table rolls in full lines, and the iow box-a slice and apron in cross section.

Figure 2 is a plan view of a part of the construction shown in Fig. 1, showing one form of resistance surface 'which may be employed. n

Figure 3 is a form similar to F10'. 1 showing an arrangement of the Wire iby Whlch the water and stock-may be caused to How uphill from the breast roll; and 0 Figure 4 is a dctail--showlng a modlficatlon in the arrangement of the resistance surface which may be employed.

Referring now-to these drawings, a wire oit' any suitable mesh 'is indicated by W.

` in various Ways.`

.pool by means of pressuresufficient to cause of free running rolls, termed Xtable rolls,

and marked generally 4;. As the wire passes over these rolls, the rolls contact with and support the wire and act to extract water from the water and stock carried on the wire. The wire also passes over a number of suction. boxes 5 located beyond the rolls,

and from the suction boxes is couch roll by a guide roll 6.

The mixture of Water and stock is supplied continuously to the wire or breast roll end, and the web is formed as the water and stock passes along with the AWire over the rolls and suction boxes.

The pool or reservoir from which the wire takes the water and stock to form the web as set forth in my copending application, may be formed' and maintained in the quantity. of water and stock which the wire will take to properly form the web desired I preferably form this the water and stock to move into and through the pool with a velocity approximately tain in the pool the quantity of water and stock required to properly viorni the desired ,web rIhis pressure may be obtained in various ways, a simple and convenient one being by utilizing the pressure head'of the Water and stock, and I obtain the required pressure by the height of the water and stock in the flow box and behind the slice or other controlling device. In the particular .ma-

guidedj to theequal to the speed of the wirel and to mainchine' illustrated the stock is delivered from more than one may be' used if desiredand 4 that controlling devices other than a slice may be used for controlling the How of water and pulp. l

The ressure head produced by the height of the ow box and consequently the amount of water and stock which may be maintained therein causes-the waterand stock to issue-from the flow box' with a velocity depending on the head, which is regulated 111 accordance with the speed of the wire. As

the water and stock issues through the opening 9 under the slice and forms a pool or reservoir indicated at`10 in front of the slice from which the wire takes the water and stock. This pool may be maintained 1n quantity of water and stock required' to properly form the web desired by increasing or decreasing the water, or increaslng or decreasing the stock, or by adjusting the slice, or by the speed of the wire.

The resistance offered by the wire to which the stock passes under the slice may be sufficient to cause the formation and mamtenance of the pool. I prefer, however, to provide a resistance or resistance surfacein addition to the wire at the oint where the water and stock issues un er. the slice to impede the flow of water through the wire. Thile this resistance may be formed and arranged in various ways, one construction which has worked out satisfactorily in prac tice, is to extend the apron under the slice over the breast roll and a distance after the slice so as to provide resistance into which the water and stock issuing from under the slice form the pool or reservoir. This 'a ron is indicated by the numeral 11, and 1s as shown in Figs. 1 and 2, a flat surface of any suitable material extending across the machine under the slice.

As is usual in'Fourdrinier machines, the water and stock arekept on the wire by the use of deckle and deckle frames or other suitable devices. These deckle straps 12 are in the form of bandswhich passover drums 13. These bands movin along with the wire under the deckle rames 13 act to keep the stock from flowing sidewise off the wire. The stock will flow under the sllce onto the wire more readily in the middle than at the sides, and consequently the web is apt to form unevenly. To overcome this, therefore, where the apron is extended forwardly over the wire a greater distance -than at the sides, and as in the present construction, the apron is preferably made of a curve form, as indicated at 14 in Fig. 2, the apron extending out on to the wire further at the center than at the sides. In Fig. 4 is illustrated a modified construction which may be employed if desired toprovide the resistance for nnpeding the flow of water through the wire. In this construction a board 20 or other flat surface of suitable material is arranged below the wire,' extending vfor*- wardly from the breast roll, and preferably formed like the a ron 11 before referred to.

In the method t isclosed in my co-pending applicatiomthe water vand stock in the reservoir or pool are agitated so as to cause the fibers to lie at various angles to each other and thus effect a better interlocking and matting together of the fibers when they felt on to the Wire than is obtained in prior practice. The formation and maintenance of the pool or reservoir by pressure as described gives an opportunity for this agitation and intermingling of the fibers and this agitation will, therefore, be preferably thus accomplished in the present apparatus.

Where, as in the present apparatus, the pressure necessary to form the pool or reservoir is obtained by a pressure head of'the water and stock, this head is preferably obtained by yincreasing the amor nt of water used, and where this water is supplied in great quantity to obtain a high pressure head, as in carrying out the invention at the high speeds contemplated, diicu'lty may be experienced in taking this large quantity `out by the table rolls and the suction boxes.

To overcome this, therefore, I'may operate I so as to cause the water and stock in effect to run up hill from the breast roll toward the couch roll end, and thus give thel water more opportunity to drain from the stock. This may be effected by depressing the breast roll or elevating the suction box end of the Wire, and I have shown a construction for leffecting this in Fi 3, in which the wire at the breast roll en is depressed to cause the wire to. run upwardly at an angle to the horizontal, and opportunity is prQ- vided for the water to be extracted. This upward inclination may of course be varied as required.

With the apparatus described, a continuous web of paper may be made at high speeds, a 1000 feet; per minute having been actually obtained in factory web is forme While a simple and convenient apparatus has been described, it will be understood that various changes may be made in the specificform and construction thereof without departing from the invention.

What I claim is: 1 1. In a Fourdrinier paper making machine, the combination of a breast roll and a making wire passing around the roll, a slice over the Wire, means for delivering the water and stock past the slice under pressure, and a resistance surface below vthe slice and extending forwardly over the roll and Wire. on to 4which the water vand stock flow (practice, and a satisand form a pool or. reservoir after the slice the water and stock flow to form a pool or reservoir from which the wire takes the water and stock to form the web.

3. In a Fourdrinier paper making ma-` chine, the combination of a breast roll and a making wire passing around the roll, a slice over the roll, means for delivering water and stock past the slice under pressure, and an apron between the roll and slice extending forwardly over the roll and wire on to which the water and stock flow to form a pool or reservoir from which the wire takes the water and stock to form the web.

4. In a Fourdrinier paper making machine, the combination with a slice or other controlling device and the making wire, of means for delivering the water and stock past the slice under pressure, and a resistance surface below the slice and extending forwardly and over the wire to a greater distance centrally than'at its sides on to which surface the water and stock How and form a pool or reservoir from which the wire takes the water and stock to form the web.

5. In a Fourdrinier paper making machine, the combination with a slice or other and stock flow and form a pool or reservoir from which the wire takes the water and stock to form the web.

6. In a paper making machine, the combination with the making wire, of a slice, and an apron under the slice and extending forwardly therefrom to a greater distance centrally than at its sides.

7. In a paper making machine, the combination of the making wire, a slice, and an apron extending `forwardly from the slice and curving from its center to its sides.

In testimony whereof, I have hereunto set my hand.

FRANK W. MONAGHAN.

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