US2274654A - Drain box for papermaking machines - Google Patents

Description

March 3,1942. E, E, BERRY -2,274 ,654

DRAIN BOX FORPAPERMAKING MACHINE;

Original Filed March 27,-1936 s sheets-sheet 1 EARL EBERRY Q15 March 3, 1942. E. E. BERRY 2,274,654

DRAIN BOX FOR PAPERMAKING MACHINES Original Filed March 27, 1956 Y 3 Sheets- Sheet 2 March 3, 1942. E. E. BERRY DRAIN BOX FOR PAPERMAKING MACHINES Original Filed March 27, 1936 3 Sheets-Sheet 3 EARL E. BERRY w M. x 0 v 3 4 3 s w w 0 3 4 4 6 k t W \A \Nww u 9 3. i 3 M 4 KZ L 3 m w w 3 4 V M Emerge Man l we Y Earl EifBerrsg'BeloitrWis,assignor toBeloit'lron e Works;Beloitswist atcorpnrationzvotwiscpnsin origami applet-tam Mama-e211; 193e,; sex-n11 uo-,.. 71,109. Divided;amtthisapplicationeMay"3;

I93fl, Serial No;:140;2a9- I V (cl; 92-9-51) V drain boxes" for dewaterin gf a 's i m;

I This invention relate s te drairi bole structure for Eourdriniertype.v paper making machines;

More: specifically this inventionrelatestodrain;

boxes? for mountingunden the upper: run of Eourdrinieri wires in paper: making machines: to

regulate drainage ofi liquid througmthe- Wires andto supportthewires...

, applicationis avdivisioniof my? copending' application. entitIedz; Pressure hndgvacuum forming paper. making: machinePQSeLi'aI: No."

71,,109 filed. L March. 27; 1936;. which has matured intoPatentllo- 23021890; a r I Attempts to; efiect web:.formation-on'Fourdrine ier' wires of. shortlengths; by forcing thedraim age of white water: from: the paperstock on. the:

wires have; notlbeeriw entirely: satisfactory because;

the suction boxes; and: draining} devices placed. 7 beneath-the forming .WiIBS havesubj'ected; the:

wires to high frictional wear. as' they passz over: the devices. The; drain boxes: of this: invention carry atthe tops. thereof bearing supp'orts for small. diameter table rolls These table rolls are supported in. the bearings throughout substanbearing-sleeves acrosskthe open" tops thereof for rotatably carryingwsmall diameter table rolls to a support the Wirescreenof. such machines as they- I pass: overthe drain boxes. V

ISL-further object-10f this? invention is. to provide drain'boxes with separate chambers thereinv and, to con-trolethe yacuum in each chamber and the drainage:- of iliiqiuid from each chamber;

A turther-objectot Jthi sinventi'on' is to-provide v improvedi'white' water draining devices for paper 7 making? machines that-can: be carefully regulated" V making machine equippectwith drain: boxes of tially'their entireaiengthsaand'by virtue oftheir:

small diameters; canv be-mount'edii'n close relation transversely of: the upper" rimiflfl the forming. wire. Thiszmakes possible asmore continuous support for the-wire without.wearing out the: bottomiof the: wire. by friction". Forceddrainage of; white water through the wire is obtainedi'byvcontrolled suction in thev dr'ain boxes-without causing a frictional. dragon the under side of thewireas,occurrecfiheretofore,

The draineboxestotithisdnventionwili be spe- 7 cifically hereinafter: describedin connections-with. -v

a; pressure. and'vacuum forming paper making;

machine forming-the subject matter ofBatent No;

the, drain: devices. of." thisinvention are adapted for use on other types; of dewatering; machines;

The drain devices of thisinvention: are. prefv erably divided mwe pluralityof; chambers ex-..---

, 2,'2c2,s90;. ltshould b'evunderstood,however, that tending transverselyfl under. the uppen run:- of; the

forming; wire;v Suction from within each; of: the

v chambers: can besebarately controlledianid'rain age ofl-w-hite. water: from. the be separately; controlled. I

The drain boxes; are slidably mounted on tracks extending through, the loopof" the forming wire chambers can; also of the paper making; machineandca-n-be: con'- tion. Separate pedestals or supports cambedis:

veni'ently moved; and out oi operating: 1395i?" posedunder the; draimboxcs: for holdingthesame: V

in: operating positions.

It is-thenzan object of; thisv invention to provide "The: drain boxes to effectfiber formation: on the wire as: desired.- iother and-,iuitherfobjectsof thisinvention will become: apparentito" those skilledin the art from the, followingdeta-iled' description of r the annexed sheets of drawings, which disclose a? preferredembodimentof the invention. On thexdrawingsr s Figurevl is a-sideelevationali view of'a. paper.

this reinvention. Y

Figure: 2% is an enlarged Figure 35 1s: a. fragmentary'vertical rcross-s'ec-- tional; view; taken substantially along" the line.

Figure 4 15a broken vertical cross-sectional view taken.substantially along the line? Asshownon 'therdrawing'si 1 Figure 1,]the reference. numeral l0? desige' I natesfthe-forming wire oi the paper machine. The wire. 10' is: entrained between a breast rol-l: H and a,v.couch:-ro11 132'." A tensioning roll l3 canbe mounted within the loop ofv the wire along v thef under rnni thereof 'for'regulating the tension. ofthe wire. I l'4= and'zf 15. of this invention are: mounted under the upperlrun of the forming wire- Ht and carry", table roll structure, as will. be 7 more fully'fhereinafter described, for supporting the: forming wire along its upper; run..

A deckle strap; [6* is mounted along. theupper run: of the formingzwire" M at each sides-=thereot and: is trained around the usual deckle. pulleys" l1: and 18. As will be hereinafter more" fully described each deckle-i'strap it rests alongKits;

bottom; run, partly on the edge of the forming: wire; lfl andpartly on the tablerolls/carried; by I the-drain boxes to: seallthe' chamber-slot thedrairr boxes and; to; prevent-leakage OfLStOCk over the sixties-ofatheformingwlre;v I If desired a dandyrollor'water inarkingroll fragmentary vertical" cross=sectionai viewtaken substantiallyalong v thelin'eII&II:ofIFigur.eI; I v

-chamber Gil located thereabovc. Thechamber 59 has atleast one passageway or opening 6| communicating with each' chamber 40 of the box-I 4. The manifold chamber 59 can be evacuated by a vacuum pump (not shown) to draw airfrom the chambers 40 through the opening Bl. Thechambers 40 are thus suction boxes on "the under side of the forming wire l since air pulled through the manifold 59 to evacuate the chambers. must be drawn/through theforming wire; l0 between the table rolls 52 along the spaces provided between the bars.

The amount of air evacuated from each chamber can be positively controlled by a stopper or plunger 62 provided forgeach passageway or opening 6|. The stopper 62is threaded through a boss plug 63 which in .turn is threaded into the box defining themanifold chamber 59. stopper 62 can be manually set at any desired .distance from a seat 65 at the mouth of each passageway Bl by a manual turning of the head 7 66 on the end of the stopper. 7

The slots 44 formed in each of the bars 43 each of the partition walls 39 and the end frame openings or slots 5| of the bearing sleeves for forming a lubricating film between the table It will be rolls 52 and the bearing sleeves- 50. noted from Figure 3 that each slot 44 has a separate passageway 61 communicating with the manifold chamber 60. In this manner water is equally distributed to each of the slots-44 for" lubricating each of .the table rolls 52.

The flow of water-into the bearing sleeve 50 can be controlled by hydraulic pressure of thewater in.the manifold chamber to overbalance the weight of the table rolls'and flow out of the bearing sleeves into the chambers 40 of the drain box alpng'withthe whitewater drained through the. forming wire. water pressure can be adjusted to-merely supply a'film of water on each bearing sleeve 53 without overflowing the water out of the sleeve.

The table rolls are/thus hydraulically lubri- Alternatively the cated andbalanced as desired in their hearing sleeves. a Each deckle strap l6, as shown in Figure 2,

rests partly on the forming wire 10 and partly- Each deckle strap .is

on the table rolls 52. guided between a plate 68 secured'on the side of the box and an inner plate 69' which may extendalong thefull length of the upper run of 'the forming wire. Theidecklestrap thereby seals the edge of the forming .wire' and the aqueous suspension of stock deposited on the; wire can only'be drained through'this wire under the'controlled drainage effected by the amount of vacuum in each compartment 40' of Y the drain boxes.

The white water drained into the drain boxes is collected in the sump 33 thereof; and pumped therefrom by means of the usual white water pumpinotshownL- A hydrostatic head of white water, however, can be maintained in each compartment 40, of the drain boxes by regulating the drainage from these .compartments.- This;

7 able in said slots for' regulating the size of. the openings between the chambers'definedby said drainage is controlled by spacing of the slides 42 from the bottom of the pans of the boxes.

Each compartment 40ican thus be sealed from the remaining compartments and the amount of suction under the forming wire'definitely controlled by the suction pump'operating through the manifold chamber 59and by the-position of the stopper 62 in respect to the passageway 6| 7 communicating with this compartment.

As best sholwn in Figure ifsome of the partition walls 39 arelnot provided with slides. These walls are spaced away from the'forming area of the wire where it is' desired to remove any white water from the sheet formed on the wire.

As a resultit is desired to have an increased vacuum at these points, created by the white j water pump and the'vacuum'pump. a

If desired, mechanisms maybe provided for oscillating the table rolls longitudinally toprevent any grooving ofv the 'rolls by dirt which might enter into theibearingjsleeve. However,

this dirt can be readily removed by an over: balanced hydraulic pressure flowing the lubrieating water out of thebearing sleeve to carry the dirtther'ewith.

From the above descriptions .i't shouldlbeun derstood that thedrain boxes of this invention carry table roll structurewhich supports the upper runof the forming wire in a more continuous manner than heretofore provided. As a result, higher vacuum can be maintained'unde'rf I the wire without the frictional wear of the under side of the wire heretofore encountered. Variable degrees of suction can be maintained under advancing increments of the wire and. the. web formation on the wire is thus nicely regulated. I am aware that many changes may be made and numerous details of construction may be. varied through a wide range'without departing from the principles of this invention, and I,Itherefore, do not purposelimiting the patent granted hereon (otherwise than necessitated by the'prior 7 art. 1

I claim as my invention: 4 v

1. A white water drain box for paper machines I adapted for mounting within the. loop, of the paper machine forming wire comprising an open topped boxhaving a pluralityof :partition Walls 4 extending thereacross to define chambers within the box, said walls terminatingabove the bottom of the box, slides cooperating withtheibottom portion of at least some of the partition walls to regulate the size. of the open space beneath said walls; and meansoperablefrom outside: of

thebox for raising and lowering the slides.

2. A device for controllingdrainage from paper machine forming wires comprising .an open topped box adapted for mounting within the loop of said forming wire and having'a bottom in-I eluding a sloping portion and a sump'portion, a.

plurality of transversely extending vertical partition walls in said box defining opened top chambers therein, saidwalls terminating above the.

bottom of the box 1 with th walls above the slopingportion having slotted ends, plates slidwalls, and means for sliding said slots.

3. Adrain device adapted'tobe mounted withplates in said in the loop of the forming wire of a paper ma-' chine comprising a box'for receiving white water i through the formingwire of said machine, said box having a plurality of yertical partition walls above'the bottom. thereof defining intercommuni-' eating chambers therein; a white water collecting sump in the bottomof said box, andgates cooperating with said' walls 'for controlling drainage from said chambers into said sump. 4;. A white water drain, device for a Fourdrinier paper machine. comprising a ,box adapted;

to, bemounted' withinlthe. loop of; the forming 5;

wire oi the machine, vertical, partition walls in said box terminating in spaced relation from the bottom of the box, said walls having vertically slotted bottom portions, plates slida'ble insaid slotted portions, and screws extending through the bottom of the box for raising and lowering said plates, 7 V

5. A white water drain device for a Fourdrinier paper machine comprisinga box adapted to be mountedwithin the looped formingq'wire ,of said machine'unde r the upper run thereof, a bottom for said boxihaving a downwardly sloping portion and a sump portion below the bottom of said sloping portion, vertical partition walls in said box terminating above the bottom thereof, the walls above the sloping bottom por-.' tion of the box having vertical slots in the ends thereof, plates slidable in said slots, and lift screws extending through the sloping bottom portionfor raising and lowering said plates to control the rate of drainage into the sump from the chambers defined by the walls. I v

6. A drain device and filter band support for dewatering machines comprising a box adapted for mounting within the loopof the filter band, a plurality of partition walls in said box defin bers in the box near the tops thereofwfor'receiving air therefrom, spaced bats in the top: por-" tions. of the chambers extending transversely across the box parallel with the partition walls, said bars having slots therein extending across the tops of said chambers, elongated segmental 4Q cylindrical bearing sleeves secured .to the tops of the bars in communication with the slots therein, table rolls rotatably mounted in said bearing sleeves for engaging the underside of the filter band to support the band, a secondduct extending alongside of the box in communication with each .of the slots in said bars for supplyinga lubricant to the bearing sleeves, and means carried by the box for rotating said rolls.

7. In a' drain device 'for dewatering-Inachines including a looped liquid pervious filter band, an open topped boxadapted for mounting-within the loop of said band, rods extending longitudinally across said box near the top thereof, bushings on said rods having upturned arms in spaced rela-. tion, transverse bars removably mountedbetween said arms, said bars extending in spaced parallel relation across the topof the boX-therebydefi r ing drain'openings therebetween, said barshaving longitudinal. slots extending across the tops thereof, a wall of "said boxhaving ape'rtures in t communication withslots, a ductv carried by said box for supplying water throughsaid apertures to the slots,,bearingxsleeves secured to the tops of therein and table, rollers rotatablynmountedfin said sleeves. r V

8. In a drain box'for dewatering machines a in the'box, seats formed on'the duct side of said apertures, valves in. said ducts adapted tofit 75 9..A drain device adaptedto be, moved as; a:

., unitinto; theloopof a Fou-rdri-nier.formingwire between; the breastrolland; conchjoll-ends of the wire for supporting the uppfilfr'un ofthe wire and for jcontrolling drainage-through the wire comprising an oped-topped box having; a bottom sloping downwardlytoward the couch roll end of the forming wire, said boxhaving; a, drain outlet communicating with the lower-rnost portionp of the bottom, spaced transverse. partition walls; I in said box extending downwardly from the top ofthe box to define aplurality: of open topped chambers in theb'ox, said; chambers being in communication with each other at the]. bottom of I the box, gates for restrictihgv theamount of; coin-. munication betweenthe chambers, means operable from outside of the boxior' actuating said gates, spaced parallel bars between the partition walls extendingtransversely-across the top DOT-.1

tion of the box, an elongated bearing support" extending along the topof each bar-and each pertition'wall, and small diametertable rolls rotat ably mounted in saidbearing Supports for carrying the forming wire.

controlling drainage through "the wire comprise ing an open topped box having a, drainqoutlet communicating with the bottom portion thereof).

spaced transverse partition walls in said box extending downwardly fromthe-top of thebox; to

provide a plurality of open topped chambersin.

the box, said chambers being in communication=- with'each other at the bottomof the boxggates for restricting theajmount of 'communication be tween the chambers, means operable from,,out-.

side of the box for actuating; saidgdtesgspaced parallel bars in the top portion of the box dis-n posed between the p'artitionw'a-lls and extending transversely across the box, thetopsof said bars and the tops of said partitionwalls providing el n ated bearing housingsextending across thetop of the box, and smallr diameter table rolls. rotatably mounted in said bearing: housings, for, carrying the forming z wirer whereby drain e, through thewire into the .chambers is accommo-. dated between-the spaced bars and. partition; walls and the amount or said drainage can bev controlled by manipulation of the gates to provide variable drainage conditions alongthe length of the box.

l1'.I n a Fourdrinier paper, making-machine having" a looped formingwi-re, a drain box-- mounted within the loopof the wire and extend-v ing beyond the sides-of the, wire, elongated. open, topped bearing sleeves extending transversely. across the top of: the box in closely spaced par-1 allel relation} an elongated stationary plate I on the side of the-boxextending;abovethe bear-.

ing sleeves, small diameten-table rollers. rotatablyv mounted in said sleeves andextending through said bars .adaptedto receive water rrom the slots said plate, said tablerollers, supporting the wire along the upper-run thereof,- driving means. gaging the extending ends of the table rollers for-driving therollers and wire, a decklelstrap iat;the-1edgeof the wire along" the upperrun.

ther I, said -deckle strap projecting-beyond the wire edge 'to abut the plate, the projecting l per:

f l'tiOn of the strap being directlycarried *by the table; rollers, and an elongated; stationary guide plate along the inner side of; the deckle strap. to, hold'th'e 'decklestrapagainst the plate whereby;

ried in the top of said box and extending transversely under the upper run of the wire for supporting the wire, said table rollers projecting beyond an edge of the wire, an elongated stationary 'wall member extending along the length of said box above the tops of the table trollers in spaced I relation from the edge of the Wire, a deckle strap abutting said Wall member and carried on a portion of the table rollers projecting beyond the wire, and said deckle strap having a portion thereof extending over the edge of the wire where-- by the deckle strap is directly carried at closely spaced intervals on rotatable supports and cooperates with the wall member to prevent leakage of air around the edge of the wire into the suction box.

1 EARL E7 BERRY.

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