US2609732A - Cylinder papermaking machine - Google Patents

Description

Sept. 9, 1952 R. H. BREYFOGLE 2,609,732

CYLINDER PAPERMAKING MACHINE Filed March 14, 1946 f YI EHTUP l a v H. finsvFoaLs invention relates to fiatenteci Sept {om-rec stares PATENT other, I It fir iiinriirli si iifiim iii fi t ltoy H. fireyfoglg dlton, Ill., assignor to Alton Box. Board Company, Alton, 111., a corporation of Delaware A'ipplicatioir March 14, leis;

2 cl ims. ((192-413) the maintenance of desired stockconsistencies in the vat circle'of cylinder mold vats. Specifically the invention deals with the distribution and dilution of stock in the vat circle of a cylinder paper inakiiig machine to maintain either a constant stock consistency throughout the 'entire vat circle or zones .fibers on the cylinder and slows up formation of a fibrous web on the cylinder.

In addition concentrated stock in the vat circle tends to agglomerate and settle out thereby creating heterogeneous fiber conditions in the vet circle which prevent the production of a uniform fibrous web. 7 In accordance with this invention stock concentration ina vat circle of a cylinder. type paper making machine-is maintained at any desired consistency by introducing White Water, other diluting liquid, such as water, or stock of controlled consistency, into the vat circle at one or more points along the circle. The diluting fluid or stock is fed into the vat circle through orifices or slots which are positioned t extend alon the length of the cylinder mold. The amount of diluting fluid or stock introduced into the vat circle can be carefully, regulated tooilset against formation ofpheavily concentrated stock areas in the vat circle. 7

. I n the preferred embodiment of the invention some of the white water drained into the cylinder mold during the formation of a paper web on the cylinder moldfrom stock in the vat circle is fed back to the vat circle for diluting the stock to maintain a; constant stock consistency throughout the vat circle. If desired, fresh stock can be admixed with the white water being fed back to the vat circle. The dilution of stock in the vat circle with white water obtained from the stock itself results in saving of the fine fibers and sizing or loading material in the white water without requiring a separation of these fibers and materials from the whitewater. Since most of the web formation on a cylinder-mold occurs on the descending side of the cylinder where the uncovered forming surface of the cylinder vices according to this invention. r

Serial No; 4,3141

2 n first enters the vat circle, the stoclc in. the" vat circleon this side of the cylinder will be more rapidly robbed of its white waterthan the stock in the vat circle" on the ascending side of the cylinder. Therefore inaccordance' with this irivention it is possible to regulate the supply of white Water for furnishing more white water-to the vat circle on the descending side oi"- the cyl" inder. In any event, however, white water is supplied and distributed to those areas of the vat circle which tend to contain concentrated stock and the amount of feeding of white water is controlled to dilute these areas and produce a constant stock consistency throughout the entire vat circle.

It is then an object of this invention to provide a cylinder type paper making machine with a device for introducing stock diluting fluid and/0r fresh stock into stock in thevat circle of the machine.

Another object of this invention is'to provide a cylinder type paper making machine. with means for introducing white Water or Tother diluting liquid into thevat circle of the machine and for regulating such introduction of white water or other diluting liquid s as to maintain constant stock consistency throughout the entire vat circle.

A further object of the invention is to provide a stock vat with devices for distributing stock or diluting liquid to different points around the vat circle thereof.

A further object of the invention is to provide a method of forming paper on cylinder type paper making machines wherein constant uniform web formations are maintained by distribution of diluting liquids, which may or may not contain fresh stock, into the vat circle of the machine. l

Astill further object of the invention isuto increase the speed of web formation on a cylinder machine by maintenance of stock in the vat of the machine at aconstant consistency.

Other and further objects of the invention will be apparent to those skilled in the art from the followingjdetailed description of the annexed sheet of drawings which; by way of preferred example only, illustrate one embodiment of the invention: y r i 1 i On the drawing: The single view of the drawing illustrates somewhat diagrammatically, a cylinder paper makingv machineequipped with stock diluting de- As shown on the drawing:

circle I receiving the under portion of the cylinder mold therein. The cylinder mold ll rotates on axles such as I la supported by the stock vat 14. A feed box It is provided on the stock vat l4 at one end of the vat circle i5 thereof and supplies paper stock S to the vat circle over a making board or bafiie I1.

The cylinder mold H is driven in the direc. I

tion shown by the arrow and its forming surface around the periphery thereof enters the pond of stock S in the vat circle at the end or the vat remote from the feed box it. White water from.

the stock S in the vat circle drains into the cylinder mold H and is maintained at a desired level L therein which is suff ciently lower than the level of the stock S in the vat circle to provide a hydraulic head for elT ecting deposition of the Stock fibers onto the cylinder mold. White water flows'out of an end of the cylinder mold ll into adrain box I8 mounted on the side of the vat [4. This drain box i8 drains through a pipe [9. entering the suction side of a White water pump 20. The pump 20., discharges through a pipeline 2| into a mixing box 22. A valve 23 is providedin pipeline 2| to control the rate of flow into the mixing box 22.

Stock from a source of supply (notv shown) is fed through a pipe 24 to a head box 25. equipped with an overflow pipe 26. regulated by a' valve 21. 'Stock fedto' the. head box 25. preferably has a fiber consistency of about 2to 5% concentration in water. The overflow 'pipe regulating valve 21 is set to maintain a desired head of stock in the box 25. A pipe 22. connects the bottom of the box 25 with the top of the mixing box 22. A valve 29. in the'pipe 28. regulates flow from the. box 25 to the box 22. The box 22 drains through a pipe into the bottom of the feed box IS. A valve 31 regulates flow from the mixing box 22110 the feed box It. The level of the stock head in the mixing box 22 determines the level of stock S in the vat l4 and flow into the mixing box from thepipes 2.1 and28 is regulated by the valves '23fan'd29' to maintain a desiredlhead or level of stock S in the mixing box 22.

White, water supplied'to the mixing box by the pipe'2l ispreferably regulated to dilute the stock'from the b0XI 25 to a consistency of about A to /2%. In other. words the stock'is diluted or. thinned down from 2 to 5% to fl 'ito consistency; v

In accordance with this invention the vat circlefl5o'f the stock vat .14 has a sump 32 on the bottom thereof. 'A' side Wall 33 of thissump is equipped witha slot .34 extending the full width of the vat circle I5; A chamber '35 is provided behind the wall-33 and extending the full width of the vat circle. A diluting liquid such as white water or. plain water 'is fed to the chamber 35 y from a pipe 36 having a'valve 31. therein tocontrol the rate of flow. This pipe 3Efis connected to a four-way or cross pipe coupling 33 which is fed from a pipe line 39. The pipe line 39in turn isconnected to a T pipe coupling 43.. having one branch receiving a pipe 4|, containing a valve 42, and coupled to the pipe line 2| bymeans of a T coupling 43. The other branch of the T coupling 40 is connectedto a pipe line 44. The pipe of the vat circle for diluting stock in the vat circle. Alternately this chamber 35 can receive plain water from the pipe 44. In this arrange ment the valve 42 is closed and the valve 44a is open so that all of the white water from'the pump 20 is fed to the mixing box 22 while the pipe 44 supplies plain diluting water to the sump 32. v

If desired, according to this invention, auxiliary diluting liquid chambers 45 and 46 can be provided under the vat circle [5, one on each side of the sump 32. These chambers 45 and 46 com municate through slots 41 and 48, respectively, with the stock containing chamber of the vat circle I5. Slots 4! and 48 extend the full width of the vat circle.

Chamber 45 is supplied with diluting liqu d throughv a pipe line 49 connected to one leg of the cross coupling 38,. The pipeline 49 has a valve 50 controlling flow therethrough. The chamber 46. is connectedv to, another leg at the coupling 38 through a. pipe line 51 having a valve 52 therein.

In some instance it may be desirable to ad- .mix fresh stock with the liquids being distributed to thevat circle so that stock is not only fed from the feed box but. is also fed from one or more points in the vat circle. For this purpose a by-pas's pipe. 53. is providedto connect the stock box 25 with the. white Water. drain pipe [9 on the suction side. of the fan pump 20. As shown, a T pipe, coupling 544's provided. irrthe pipeline 28 from the box 25 ahead. of the. alve 29 and'the pipe 53is connected to one leg of the coupling. A second T pipe coupling 55 connects the pipe 53 with the pipe i9 adjacent. the pump 23. A valve 56 is provided in pipe 53 to control flow from box25 to pump 24- thereby regulatingv the proportion of freshv stock addedto the white.

water entering'the pump. Under'certain-conditions all of thestock fedto the vat circle could be fedthrough the by-pas s route.

The arrangement is such that controlled amounts of plain water or white 45 from either or both otthe pipes 2| and '44. Thus if it is desiredto supply some plain' water and some white water toany or all of the chem. bers 35,45 and 46, the valves 42 and-44a are so regulated-to supply the proper proportion of the two diluting liquids to these chambers and the valves 31, 55 and 52 areso regulated to distribute the mixed liquid as desired. If it is desired-to only suppl'ywhite Water to the chamber 35 the valves 42 and 31 are opened-while the valves 44c, 50 and 52 ar eclosed. The piping and valving arrangement gives a very flexible control for diluting liquid distribution.

It has been found that when-stock consistencies or A -to A are fed tothefeedfibox lt-through the pipe at, the white water pumped'out of the cylinder mold II by the pump 20 will. have a stock consistency of about 1 to The stock in the white water contains fibers, loading material,- sizin materials and the like. These fibers and materials are normally reclaimed-in a: so-called white water concentrator and are then readmixed with "fresh'stocle' The present u water. admixed if desired with fresh stock, can be selectively or simultaneously fed to the chambers 35; 45 and invention on the other hand utilizes these materials without the necessity for separating them from the white water. Some of the white water,

according to this invention, is recirculated directly back to the vat circle through the diluting liquid arrangement of this invention while the rest of the white water is circulated to the mixing box 22. Therefore it is not necessary, according to this invention, to use a separate white water concentrator for treating the white water.

Stock formation on the cylinder mold l occurs most rapidly on the descending side of the cylinder as it first enters the vat circle l5. There is therefore a tendency for stock to thicken out and become concentrated in this portion of the vat circle. Concentrated thick stock is not free flowing and web formation is normally slowed up. The introduction of the diluting liquid, in accordance with this invention, will prevent slowing up of fiber deposition by maintaining a desired stock consistency at an points in the vat circle. In addition, the introduction of the diluting water maintains the stock fibers in the vat circle in a well dispersed condition thereby insuring consistent web formation across the entire width of the cylinder mold. Diluting liquid therefore not only eliminates the heretofore encountered formation of concentrated stock areas in the vat circle but also disperses the stock in the vat circle to prevent accumulation of fiber bundles.

It will, of course, be understood that various details of construction may be varied through a wide range without departing from the principles of this invention and it is, therefore, not the purpose to limit the patent granted hereon otherwise than necessitated by the scope of the appended claims.

I claim as my invention:

1. A cylinder type paper making machine comprising a stock vat defining a vat circle for confining a pond of stock, a cylinder mold mounted in said vat circle for rotation through the pond of stock, said vat circle embracing substantially 6 more than the lower half of said cylinder mold, but being open to the atmosphere at an elevation below the top of said cylinder mold, a feed box for supplying stock to the vat circle adjacent the top of the stock pond at the ascending side of the cylinder mold, a localized chamber extending across the width of said vat circle adjacent the bottom thereof, said chamber having an orifice communicating with the pond of stock in the vat circle across the width thereof, a drain outlet for the interior of said cylinder mold,

means for pumping white water from said drain outlet, and valved conduits connecting said pumping means with said chamber for introducing white water into the vat circle throughout the width thereof to dilute stock in said circle adjacent the descending side of said cylinder mold.

2. The combination of claim 1 wherein there are a plurality of said localized chambers spaced peripherally about the lower side of said vat circle, each of said chambers having an orifice and a valved conduit as defined.

ROY H. BREYFOGIE.

REFERENCES CITED The following references are of record in the iile of this patent:

UNITED STATES PATENTS Number Name Date 1,672,249 E1113 June 5, 1928 1,708,724 Haug Apr. 9, 1929 1,782,215 Sheperd Nov. 18, 1930 1,869,148 Holcomb July 26, 1932 1 2,001,208 Minskey et a1. May 14, 1935 2,036,168 Engert et al Mar. 31, 1936 2,059,184 Kutter Oct. 27, 1936 2,259,859 Covey Oct. 21, 1941 FOREIGN PATENTS Number Country Date 66,148 Sweden Oct. 9, 1928 634,716 Germany Sept. 2, 1936 638,623 Germany Nov. 19, 1936

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