US1705907A - Method of and means for deinking fibrous material - Google Patents

Description

Marchl9, 1929. J DE wm *1,705,907l

I METHOD 0Fv AND MEANS FOR DELKING FIBROUSYMATERIAL Fled July `14, 1927 5 Sheets-Shet l y lINVETOR. Q Lu 28, BY j ATTORNEY March 19, 1929. J.' DE w|rfr l ,705,907

METHOD oF AND MEANS Fon DELNKING lFIBRoUs ATERIAL IN V EN TOR.

Marh19,1929. J, DE wm 1,705,907

METHOD 0F AND MEANS FOR DEINKING FIBROUS MATERIAL i Filed July 14, 1927 5 sheets-sheet" f4 CLEAN Pau? STORAGE STORAGE.

FOR USED FLUID IN V EN TOR.

J. DE WITT METHOD OF vAND MEANS FOR DEINKING FIBROUS MATERIAL vMarch 1,9, 1929.

' Filed July 14, 1927 5 Sheets-Sheet up f- INVENTOR. @QI/0136" B Y j MA ToRNEY v process for deinking fibrous material such asV tively; *n l l.

Fig.- 6 isa longitudinal sectional view of a i soakin venience of eXpressiombutjtliey are intended j i' 'the inanufactui'evof usable paper.

' tion of a portion of Fig. 10; and

Fig. 12 is a detail view of the retaining Patented Mar. 19, 1929.

E UNITED STATE-,S

JENNINGS DE WITT,

IPf.Tisziirr"oF-Fics.

lor NEW YORK, N. Y.V

' METHoDoF-AND MEA-Ns non DEINKING FIBRoU-s MATERIAL.

Application vfiled my 14,

This invention relates to an improved paper or the like.

The invention has particular reference to the recovery of newsprint paper. According to my improved process yfibrous materialof the kind used in the production of newsprint paper may be employed forthatpurpose and subsequently may be effectively recovered for f subsequent use.l y v Y y* A feature of the invention relates to the eectiv'e removal of the ink and other` foreign y materials fromv the liibrous inatterfand the elfticient utilization of the deinke'd' material in An important object of the inventionis to provide an improved processufsing lcold water, thus reducing the cost of the process.

Another Vobject yis to avoid damaging or l breaking down the fibers ofthe'inaterial being treated.

As an aid to understanding'of the iiivention reference isiiiade to the accompany# ing drawings in which i Fig. 1is a side'elevation of apump mecha-y nism employed in the practice ofv the inven` tionv Y Fig. 2-is an enlargedsectional view ofa portion of Fig. 1;

Figsl, 4 kand 5 are the liiie 3-`-3, 4 4 and 5-5 of Fig. 2, respec- V Fig. 7 is an end Fig. 6;

yelevat'on. ofthe `tank `of Fig. 8 is a transverse sectiontakeno'n the line 8-8 of Fig. 6

' Fig.f9 is ageneralflayout offa deiiikiingi'i plant; Fig. 10 is aside elevationof a modified -Fig 11 is. aiienlar-ged longitudinal secclamp of Fig. 11. e Y Y -Like reference characters 'denote like parts in the several `figures of the drawing. l

Inlthe following description and cl`airns,1A parts characteristic features. jan'd functionsk will be identified by vspecifiemeans for con-` to be as generic inzktheir applicationjto simi? g *and g inangle tank employed the@ practice of the invention;l

to forma seat. for a 1927. serial in. 205,608. i

lar parts o r equivalent construction as the art Will permit.

Referring particularly shown acentral'puinp mechanism 1 mounted on a base'lO7 having a pedestal 11 thereon for supporting a cylinder12. A support 13 to'Fig. l1 thei'eiis is secured tothe base 1() apart from the ped-' estal y11 for supporting af guideway 14 in axial alineinent with the axis of the cylinder 12. A pistonjhjead shown generally at15 is slidablymounted Within the chamber of the cylinder 12 and is actuated by afconnecting iod 16 extending through the end Wall, des'- ignated as at 17, ofthe cylinder 12. The outer end of the connectingrod 16 is pivotally connected to a pitman'18 and-thus to a fly vvheel 19'Which is operatively connected in any suitable manner, as by a speed reduction vgear to yav source of povveigpreferably inthe Vform of an electric motor 20.

yThe piston head 15 is provided `ivith apei forated end Wall 30k and a iiange l'integral v`therewitln snugly fitted inthe'bore of the cylinder .12'. In the recess formed by the lflange 31 there is mounted a mass of com-v pressible material 32, preferably. of sponge rubber or iber mat material, which is held inl place by means of a kpair of. spaced Wire' n e f y .screens Vor gridsv 33.- Each screen 33. may be cross-sections taken on f' The innei`l grid isy held in place by a sleeve 36y Within the flange 31.V A retaining ring 84 is? formed; forv example, of. l inch Wire net.

.f municates with ay feed pipe 46.* The outlet -port`451communicates with a pulp discharge pipe. 56. Apacking ring 47 is preferably mounted in an annularrecess in theend Wallv y; of the' flange 35 for effectively sealing the-roytary l valvef against undesirable j leakage. VA nhousing'48 is secured'to'the'flange35 in any desired manner as by'bolts :such as 49', a gaskety 50 being interposed to prevent undesirable fleakage. 'l`lie pinion 42 is'securedto a shafty The other asv ` fibers.

supply of clean saponifous solution Which may be supplied by a pipe 139 to thehose 110. The vat 126 is provided with an outlet 127 having a control valve128 leading toV a pump 12S).Y The outlet pipe .130 extends by way of branch pipes 131, 132 to the valves 112 of the tanks 70. r1`he pulpdischarge pipe 56extends vfrom the cylinder 12 to a clean pulp storage tank 133 in which vthe clean'pulp may be stored and subsequently discharged through a pipe 134 Whenever desired.

ln operationE Va quantity of saponifous solution is injected through the hose-110 into one tank 7 0 until all of the mangle blades 61 of the tank are covered by the solution. The drive shaft 10() is operated but the clutches 98, 94 are left disengaged. vThe process Will be described with reference to the arrangementY illustrated in 95 itbeing vassumed' that the lower left-hand tank of this figure being the first one of the series and that the successive tanks considered in a clockwise direc-1.

tion are successively in that order: The printed paper to be acted upon is now' depositedin the middle of the tank above the middle shaft 75 and the material isallovvedvv` to soak for approximately tvvo` hours `in the The material is thenv permittedto soak forl an additional interval of Yone hour With thev clutch disengagedf .The clutch is then once more engaged so that the mangle 'blades are again rotated fork a period of three-quarters.

of an hour. v`During the last fifteen minutes .w of this "three-quarter hour period', the valve 114 of the first tank is opened andclean Water is introduced. into the tank. i

" The. first soak oftwo hourswvith the man-fy peate'd onsubsequentI charges of material gies idle perinitsfthe saponifous solution tov remove aconsiderable'amount of ink yand sur- Vfaee'd.^`ii"t from the material being .acted on.

During the vsubsequentperiod of fifteen min- A, utes v1the material is torn apart or shredded by the blades in order to` give access to all of the forty-five minutes the mangles are operated to Wash thefibers and effectively remove the ink and other foreign material. It is during the last'fifteenminutes of'this interval thatv the material receives its first Wash." c .The motor 'having been started for operating the central pump7 the -Outlet valve 116 Vof the first tank isl controlled to permit aY During the succeeding interval ofv gravity into the pipe 46. V*The valve controller 54 is manipulated to permit the linterior of the cylinder 12 to be filled with the solul tion as the piston head 15 is drawn to the left of F ig. 1, it being understood that when the inlet pipe 46 is opened to the cylinder 12the outletfport 45 of the rotary valve 4() is closed.'

The inlet port 44 of the rotary valveV 40is now also-closed.y On the right-hand stroke of the piston 15 the sponge rubber 32 is compressed against the-solution.'-`At thebeginning of the next left-hand'stiioke, the rotary valve 40 still remaining closed the sponge n.

rubber or fiber mat 32 yexpands to the extent permitted by the screen 38. ln thus'expanding the sponge rubber 32.takes up considervable'ivater,butits characteristics are such that itdoes not take up the fibrous material.

The lpiston head 15 is moved to the fullexl tent ofits stroke toward theleft of Fig. 2. t .Willbeiioted that the fluid has free passage through the apertures of the endl WallBOpof the piston head v15 and then through the outlet pipe 67. vThe piston head 15 is again moved to the right and again the compressible mass 32ispressed into contact with the pulpyV materialtrapped Within the cylinder cham-v f ber. .The Wateiivalve 63 may be opened vfor the introduction of clean Water, and thus assist in the Washing ofthe pulp. vThe sponge is again compressed and when the piston head f 15 againinoves tothe rightit absorbs consid'- erable fluid Without picking'up any ofthe.

fibrous material. The' piston headr 15 is reciprocated in this manner as many times as desirable, preferably at least three times. rOn each stroke the sponge 32'is `alternately coinpressedfand expanded and thus absorbs and pipe 67 into the storage tank 126.V Before Vthe commencement of the last right-hand stroke of the piston head 15 thehandle l 54'is`nianip- `ulated so as to open' the discharge portl 45.

throughthe pipe134 intoy the paper mill. inV

which it is'to be used'. rlhis action mayberee yreleasesiiuid.` The fluid flows through they from the first tank 7() until that tank is empty, f

` and then the valve v116 of that tank is closed.

` Tlie operation thus describedwith refer enceto the central pump l requires for paper printed .in 'black ink approximately `thirty minutes. Accordinglyythe.second tank 70 of the series, shown just to the rightv of the first'tank describedis filled' With saponifous solution thirty minutes laterithanthe firsttank Was filled, and the operationris repeatedA .with this tank in the manner described in l measured quantity off the fluid to passv by tankNo. 1 and when valve 116 of tank No. 1 4 i is elosed,valvo 116 ot tank No. 2 is4 opened and the contents ot tank No. 2 are similarly acted upon in the central chamber 12.

1n the same manner tank No. 3 is filled With solution thirty minutes after, tank No. 2 and thus the ope 'ation can befcontinued in sequence. After tank No. 8 has been emptied and its contents treated the operation is continued again on tank No. 1 and so on.

After the tanks have been filled the :[irst time the saponi'lous solution contained in the storage vat 126 may be used instead ot' fresh solution. For Athis purpose the motor driven pump 129 is started, the valve 128 being opened and thus the solutiony is driven through the pipe 130 in the' branch pipes 132, 131 and by controlling` kthe valve 112 of the tank 70 the solution may be used successively. After havingv been used 'for a time, for instance, during` two cycles otoperation, the valve 136 is closed and the valve 139 opened, and the solution returned to the reeoncen* trator andelean solution obtained 'from the soap plant.

in the modified embodiment, illustrated in Figs. 10, 11 and 12, the central pump mecha@ uisiu coi-nprises a base 1t), having` a pedestal l1 thereon toi.' supporting a cylinder 12. A. support 150 is secured to the base 10 apart from the pedestal 11 for supporting` one Vend ot' a guider/ay 151m arial. alineinent with the secured to the open end oit the cylinder 12. A

yaxis et the cylinder 12, the other end being pifston head 15 is slidably mounted Within the chamber et the cylinder 1.2 and isactuated by a conneetine rod 16 pivotally connected thereto and extending through the open end ot the cylinder 12. Vlhe outer end ot the con*- necting rod 16 is pivotally connected to a slide 152, slidably mounted on the guideway 151 and having a pin and slot connection with au operating; lever 153. The lever 153 is pivoted at one end as at 1511 to the base and is provided at its other end With a handle 155 tor convenient manual operation. The pivot 155; rests in a slotted bracket 155 so that the lever 153 can readily7 bev dismountedtherefrom.

lhepiston head is provided with a perf .tore-ted end wall' 3() and a flange 31 integral therewith and snugly iitted within the bore he evlinder12. iVit-hin the recess formed by t" cfuxu'vressible mat fial 32 held in place by n ians of a pair ot spaced lWire grids or .frena 33. each of which mav be Vformed tor example, et 1/2 inch Wire net. rlhe 'nner grid is heldin place in any desired manner as lily a sleeve 36 fitted Within the 'liangge 3,. A retainingr ring- 34 is sci'e\\.'tlneaded 'into the iiange 31 tor main tainingthe outer grid 33 in place. A separable plate 160 may he conveniently placed over t ie outergrid and is held in plaeeby a spring clamp 161 having arcuate ends 162 neilange 31 there is mounted. a mass of' engagingthe inner surface of the ring 34. A hopper 170 is mounted on the base 10 beneath the open end of the cylinder 12 and is provided with a discharge pipe 67 lor the discharge oit' slush fluid into the tank 126 or into a soap concentrator, as previously described in connection with Fig. 9.

rlhe operation ot' the mechanism shown in Figs. 10, 11 and 12 is controlled manually. At the commencement of the operation, the plate 160 and clamp 161 are removed. The outlet valve ot the iirst tank is opened so as to permit a measured quantity oi? the fluid to pass by gravity into the pipe 416. The valve controller (see l? 10) is manipulated to permit the interior ot' the cylinder 12 to be lilled with the solution, as the handle 15 drawn to the lett of Fig. 10, it being understood that when the inlet pipe 46 is in ci'nnniunicati on with the cylinder 12, the outlet port leading` to the pipe 56is closed. The inlet port lea ding` to the inlet pipe 46 is closed when the handle 155 hasbeen moved to the lett su'liiciently to lill the cylinder 12 With solution. On the right-h and stroke of the han-` dle 155 the piston head 15 is moved to the right and sponge rubber' 32is pressed against vthe solution. At the beginning. oi' the next left-'hand stroke, rotaryvalve still remaining closed, the sponge rubber 32 expands to the extent permitted by the screen 33. ln thus expanding the sponge rubber 32 picks up con- 'iderable Water but its characteristics are such that it does not take upthev fibrous Inaterial. f l

The piston head 15 is again moved to the lett of Fig. 2 and this operation repeated as has been previously described With' the power driven mechanism ot 1. It will be noted that as the sponge rubber 32 alternately expands and is compressed, it'takes up and releases iluid from the solution, Without, hoW- over, taking upthe ibrous material.- rlhe liuid has :tree access through the endwall of the piston head 15 and through the .open end ot the cylinder'12 into the hopper 170 and through a discharge pipe 1i' 1. Before the commencement of the last rigilt-hand stroke ot the handle 155, it is drawn fully to `the, lett so as, to move thepiston head 15 outot the cylinder'12 the lever 153 being removed trom its support. rl`he plate 16() is then placed over the outer screen 33 and clamped by the clamp 161, after which the valve handle 54:

yis manipulated so as to open the discharge port leading` to the pulp discharge pipe .56.' The handle 1557s thenmoved to the right and the dehydrated mass is 'forced out through' 'the pipe 56and intothe storage tank-1.33. The tanks are used in rotation as previously described in connection with the embodiment oli4 Fig. 1. Y

Thus it will be seen that the material is act-I ed upon in a continuous operation with very little labor. llo hot Water or heating mechanism is required vrand'thus the operation can be effected ata minimum of expense.-

It lwillbe seen that vin vthis improved process the coniplicatedbeater machines heretofore employed'iii prior processes, and the power equipment required for driving the v same are entirely eliminated, and this avoids injury to the fibers caused by such machines.

According to the present process the fibers of the material being acted upon are not,V

The invention upon whichr this applicationV is based is broader than the specific embodiment shown and described for the purpose of illustrating at least one of the ways in which it may be employed. The scope of the vinvention is, therefore, to be understood as not being limited by the present specific description. I intend no limitations other than those imposed by the claims.

What is claimed is .1. The process of deinking newspaper which consists in the step of soaking the printed paper ina saponifous solution for approximately two hours, shredding the soaked material in solution for approximately lifteen minutes, soaking the material at rest for approximately one hour, shredding the material for approximately thirty minutes, shredding and washing the material forv approxi-v mately lifteeii yminutes and sponging fluid matter therefrom.v p

2. The process ofdeinking newsprint paper which consists in the step lof soaking the v, printed paper in a saponifous solution for approximately two hours, shredding the soaked f material in solution for approximately fifteen minutes, soaking for approximately one hour, shredding the material for approximately thirty minutes, shredding and washing the material for approximately fifteen minutes, and deliydrating the material by sponging.

3. The process of deinking newspaper pa-4 per which consists in the step of soaking the printed paper in a saponifous solution for approximately two hours, shredding the soaked` materialin solution for approximately fifteen minutes, soaking the material for approximately one hour, shredding the material for approximately thirty minutes, shredding and washing the material for approximately fifteen minutes, alternately immersing and removing therefrom a spongy mass of material,

and intermittently compressing the spongy maiSS. I

'v The process of recovering used newsprint paper which consists in tlie'step of soaking the v proximately thirty minutes, shredding vand.

washing the material fory approximately therefrom for approximately thirty minutes.

y 5. A process of treating printed paper stock to remove the ink and recover the pulp, comprising subjecting a quantity of theprinted paper to the `action of a soap solution Whileatrest, subjecting the mixture subsequently to agit-ation, again soaking the material while at rest, agitating tlie mixture, lwashing the stock so treated, and sponging fluid therefrom.

6. 'A process of treating printed paper stock to remove the ink and recover the pulp, comprising subjecting a quantity of the printed paper to the action of a soap solution while at rest, subjecting the mixture subsequently to agitation, again soaking the material while at rest, agitating the mixture, washing the stock so treated, and alternately immersiiig and removing a sponge until dehydrated.

. 7 A process'of treating printed paper stockV to remove the ink and recover the pulp, comprising alternately subjecting a Vquantity ofA `fifteen minutes, and sponging lfluid matter Y 8. A system for the treatment of newspaper anism, a plurality of mangle tanks arranged, I to be operatively connected thereto in se-f-V quence, a storage tankfor recovered fluidfandv a storage tank for treated pulp.

l0. A process ofgcleaning inked paper stockl and like materials which consists in immersing the material in a cold saponifous solution for a measured period of time, agitating the mixture for a measured time interval, again soaking the material while at rest, agitating 'solution while at rest and while agitated, and subsequently subjecting the mixture to the action of sponge rubber.

12. A process of cleaning inked paper stock and like materials which consists in immersing" the material in a cold saponifous solutiony for a measured period of time, agitating the mixture fora lesser timeV interval, again soaklution While at rest and While agitated, Wasli i ing the material While at rest','agitating the ing the material and subsequently subjecting, mixture, Washing the material and subjecting the mixture to the action of sponge rubber. the mixture to the action of sponge rubber. Signed at New York in the county of New 13. A process of cleaning inked paper stock York and State of New York this 13 day of Y and like materials Which consists in alternate- July, A. D. 1927.- ly subjecting the material to a saponifous so- JENNINGS DE WVITT.

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