Patented Apr. 19, 1932 19854 881 UNITED STATES PATENT OFFICE JOSEPH E. BOND, OF APPLETON, WISCONSIN AGITATOR Application filed April 8,1929. Serial No. 353,565. My invention relates to the ar@Ll of paper making and particularly to iiieans for agitatin- paper pulp. In the development of the ,trt it has been fotind possible to greatly in,-rease the capacitv of a given equipmeiit by increasing the jensity (or, in other Nvords, lesseiiing the fluidity) 6f the pulp duriii(y its treatment preceding deliverv to the Fourdrin@lers. 10 While in the old practice a 21/:?@'o pulp was considered proper and of the m,,ixiinuiii densit possible, it is now 60riiiiaoil to deal y with 6@'o solutions, with correspoiidingly increased prod-Liction capacity. 15 Howevet@, inan-i difficult probleiiis are encountered in h-,indling pulp of this clensity due to its lack of fluidity and its teiidency to n,iass or eakp- in the storage or tre,.,tn-ient tanks aiid containers. This tendency is in@O herent in the natiire of the iiiaterial uiider ti-eatment due to its fibrou@ character and to the physical law of attraction of solids. The liquid -%vithin whi-ch the sollids -,tre carried serves iiierely as a supporting medium 25 therefor and faciii-tates rather than hi,@iclers Clie massing and intert @vinin(y o'L the fibers. zn To avoid n-iassiiig and stratifyiiig of ttie ulp in the liquid ,tnd to m,,tilitain i 1-inif ori--q @ensitv throuo- out the entire body f te,h o ma 3u rial, it must be kept ii motion aiid the iiiotio.1 ro,-ILiciDg naeans should have -t teiiden--y to Creak up and teai- apart any larcye or siiiall masses of pulp. In the old pract-tee the @iiixture ivas kept in inotioii. by meaiis of paddles 35 or iiiipellers in the tank, but this apparatus had very little tenden,-y to bre,.ili: ul) masses of pulp, and -",as whollv ineftective with stock of inereasecl clensity. i@urtl-iermore, such Lpparatus required eii oiitlay of po-w--r not corii40 mensurate -,vith the res-Lilts secured. TI-ie tanks chests or c6ntai-ners Nvhi-ch a I re in place and must be utili-zed for the new plan of operati6n are of m,,,iiy ancl iaried forms, all of gre,,tt size, some narrow aDd of 45 great lenuth, some deep al-i(I some rouiid. The probfein has been, therefore, to provide iiieans applicable to these various fornis of tanks that would insure effective eircul,@itioi), the breaking up of pulp masses ancl the main50 tainance at all tiliies of a proper cons-istency throualio-Lit the -Nvh6le volume of iiiatei-ial, ivith a minimtini of poiyer expei-iditure. My invention en-ibodies also the coinoinatioii with a noitel piilp aoritating iiiea,ns ver7 tic,,tlly disposed and located entirely within 55 the walls of the chest. By locating the agitat7 in- iiaeaiis entirelv ivithin the chest, considert@ble expense is sq,ved iii the construction of the chest. Also due to this fact, ally number of variatioiis in the agit,,itor inay be 6o effec'ed iyithoiit the recessit), of aii3, alteration in the desi-ii of the tank@ TI@ie ao,itatoit@ zn is constrlicted especiallv with a view to siinple ,iiid ready inspectioi-i and replaceiiient of belrings the iiiotor aild iiiipeller beinu 6 -0 7 @ I disposecl vertically rather tliin horizontally as has beeii the practice. My invention -will be more readily understood by referelice to the ace6iilpaiiylng dra-,vings, in whicli: 70 Fig. I is a plan vienv of fLn a,-i'tator c6nstructed in accordance - NV, @th invention-, Fig. 2 is a transverse sectional vieiv on the line 2-2 of Fig. 1; Fig. ao is P traiisverse sectio--.iil of tl-le 75 a(ly;-tating puii-ip. In the dranvings, I have illustrated a tank or container of generally rectangu ar orm, hav-lng side walls 10, ,t floor 11 and end walls 12, 13 which n-iay be f orn-ied of concrete or so other - water impervious inaterial. Large fillets are provided at tl-ie junction of the side walls and floor in order to facilitate the circulation of the inass. Extending longitudinally of the tank in s,5 the center thereof is a division wall 14 dividing the tank into two compartinents 15, 16. The wall teriniiiates short of the end wall 13 of the tank and at the point of terminition is laterally projected as at 17, 18 to provide a go baffle. The floor in the discharge compartment 15 is constructed to slope down toward the end wall 13, and the floor in the compartn-ient 16 is constructed t6 slope down from the encl wall 13 toward the end wall 12, thus 95 insuring a movement of the stocli-, at all times by gravity. At one eiid of the tank is the well disposed vertically in one of the two 'chambers of the chest. The pumping -Linit comprises the mo@ ioo 2 tor 19 restin(r oii the pedestal 20, casing pipe tank and termii-iating short of the other encl or -well 21, suction pipe 22, hanger pipe 23 thereof , means providing a ivell vertically having theh,,ind-holes 24, 25 and covers 26, disposed withii-i the -,",ell, ai-i impeller con27. The vertical shaft 28 secured to the cou- nected to the sliaft and i-i'lounted tt the lower plina 29 ext,ends throiigh the thrust bearing end of the -",ell, means proi,iding a diseliarge 30 to the bottoiii of the casing where it is conoutlet .it a point i-iear the upper end of the iiected to the iinpeller 31. The lower ex-",ell, said dischar,-e outlet being disposed tren'lity of the hanger pipe 23 is proi,ided into the side of the tank opposite froiii the l@vith a stuffing box 32 to prevent drawiiig any side in which the well is located, and driving 10 foreign nlatter inside the hanger pipe' ineaiis connected to the shaft above the liquid ',7.5 At suitable poii-its in the lengtli of the well, leiel of the tank. I provi(le the i,ertically split Babbitt bearings 3. The combination. with walls forinilig a 19)3@ 34 within the beariiig casinus 35136. The 'f-lank, of a division w@ll extending loiigituctibearin- casing 35 is supp r@ed in the ma- -p-ally and slibstantially along the center of 1,3 chined @n joints 37 in the han(rer pipe. Tlie oil the space Niithin the tank alicl terminating 80pipe 38 extendinu fi,om the top of tl-ie well short of the eiad thereof in a lateral projecprovides lubrielition for the beariiigs 33, 34. tion, a vertically disposed ivell located withThus it is seeii that I have constructed a iii said tank at oiie encl thereof, stid w ' ell pump which it is very easy to keep in repair. h,,t%7ing an inlet near the floor at one side of 20 If desirecl to replace Babbitt bearings, the said dii,ision wtll, and a (lischarge pipe near 15 covers 26 727 inay be remoi,ed from the hand- the top of said @iell an(I projectin(,r into the holes 24, 25 ind ihe split bearinos may e,,tsily sptee at the opposite side of the said division be grasped and removed. If the beariiig cas- wi.11, s,,tid discharge pipe 'Leriiiinating at a ing needs repair, the top flange,-l section of Iiigher level than said inlet. tl-ie hanger pipe may be simply lifted oft' the 4. In combination, a tank having a ivall lower section. clividing the space thetein into two compart@ As best shown iii Fi(r. 2 the well is so con- ments i-Li open cominunication at one end only structed that the suction pipe 2@9 is below the of the tank, ,t vertically disl)osed well withbottom lever of the chest. TI-ie stock is in said tank ancl at one end thereof, means dra-wii upwards by the impeller 31 ,tpd dis- providino, aii inlet at the lov,,er level of a com- 35 charged througli the diseliarge pipe 39 ivhich partinent -.tt the end of the tlnk opposite to extends throu(rh the division wall 14 to any that end at Avhich there is collimi-inicatioil desired point in the opposite chamber of 'U-he between compartments, and means providi-ng cliest. If for the purposes of better eircula- a discharole into the opposite compartment at o:i tion of stock it is desired to dischar-e the -,t different level than that of the inlet. 7@OG stock at a certiin angle, or near the opposite 5. I.Pcombination, a tank having a wall dieiid, -elbows may reaclilv be sectired to the x,idin(r the space therein into two compartdischarge pipe 39. To Tacilitate delivery of iiients'@l-i ol)eii commtinicatioil at one end only stock I provide the discharoe pipe 40. of the,;ank, a vertically disposed well at one Froni the above descri-peioii of my inven- eiicl of said tank, means at the end of the 5 tion, it will be readily seen that I h,,tve pro- tink opposite to that encl at which there is vided a chest for -tgitLtina paper stock in communication between compartments prowhieh there is a perfect, constant movement viding an iiilet at the loiier level of one con-lof the stock insiiring propi,-r consistency and partii-ient and a dischirge pipe projected preventin- stratifica4u;on by me,,ins of a novel throu(,rli the dividin(y wall aiid tdapted to -IC) -well which is easy to maintain, ,Lnd cheap to discharue into tlie ,td'jacent compartment of i,nstall. said tank, said well beiii- located entirely :Obviously modific,,ttions ,tiid variations within stid tank. n ma.y be made in the structure and design of 6. In combination, a tank having a divithe invention here diselosecl, and I do not sion wall, a pulp eirelilating uni-t MoLintecl in w.ish to be limited except as indicated in the the t,,ink, said ui-iit havinc, an inlet at a low a@ppended claims. point in said tank at one side of said wall and I claim an outlet at a hi(rh point in the tank on the 1. In combination, a tank, a clivision - ,vall opposite side of said division wall, said unit xtending longitudinally from one en(I of consisting of a vertically disposed pipe, an r) e the tank a-.id terminating short of the other impeller at tb.e lower end thereof, a, inotor end ineans providing a ivell i,ertirested on the upper end of the pipe above cally disposed within the well, an impeller the level oj' the tank and a vertical shaft dicoiinecte d to the shaft and mounted at the rectly connecting the motor and impeller. co loiver ciid of the means proa,idiiig a dis- Iii testimony wliereof I have affixed my r end signati-ire. charge outlet at a point neir the uppe of the well, a.nd drivina meaiis cornected to JOSEPH E. BOND. the.shaft above,the liqliid level of the tank. 1 2. In combination, a tank, a division wall extending,lorigitudinally from one encl of the