US1270422A - Save-all. - Google Patents

Description

E. W. LINDQUIST.

SAVE-ALL.

APPLICATION FILED MAR. I5, 1918.

Patented J une 25, 1918.

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SAVE-ALL. K APPLICATION FILED MAR. 15, 1918.

1,270,422. Patented June 25, 1918. 3 sHEETs-sHEEI 3.'

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: Speicatiw'of Letters Patent Patented dune 2th tutti.

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To all whom, it may concern:

Be. it known that I, ERNEST W. Linn- Qtfis'r, of Lawrence, in the county of Essex and tate of Maachusetts, have invented certain new and useful Improvements in Save-nils, of which the following is a specification.

rlhis invention relates to'what are known as save-alls for paper pulp. ln the process of paper manufacture with what is known as a wet or. cylinder machine,v a screened cylinder' or cylinder mold revolves in a vat and picks up a certain amount of stockv which is removed by a couch roll or in some other way. Some of the lline stock passes through the mesh intovthe inside of the cylinder and as it has a value, it is desirable either to separate it entirely from vthe water or toreniove a certain proportion of water so as to make the stock thicker. This saving processis usually done in a separate machine. p

In other' paper 'making processes, it is sometimes desirable to reduce vthe amount of water in the stock or to thicken it, and thisis accomplishedin machines known as thickeners.u Y

In the wet or cylinder machine and in the thickener, there is a vat and a screened cylinder reyoluble thereiii, and my invention in general consistsin locating an inner cylinder inside the outer cylinder, in providing means for allowing theV substantially clear waterto run'frominside vthe inner cylinder to the outside of the-vat, and in providing means for removing to a point outside the outer cylinder -ttlie thicker part- Aof the screened stockwliich remainsv on the outside of the inner cylinder. Such stock may be removed entirely from the machine or may be rettuned directly to the vat to be ren worked. rlfhe inner cylinder may or may not have a hner mesh than the outer cylinder.

lint the drawings, Figure 1 is an elevation from the left of a cylinder machine of my construction with. parts of the endet the vat and parts of theheads of the'eylinders removed` and some parts shown in diagram` Fig. 2 is generally a vie-w from the direction or the arrows on line Q-Q of Fig. l, some of the parts being broken to show construction. Figs. 3 and-l are views of modications on sections similar to Fig. 2. Fig. 5 is an elevation from the left of the machine shown in Fig. t. Figs and 7 are details of a valve, Fig. 7 being a section in fl 7-7 of Fig. 6.-

At represents a vat of rectangular having a curved inside partition l. i merges with side 2 of the vat, but at the other side is separated from the side 3 .forining a. channel4 through which the stock C enters the vat through pipe B. 5 is the bottom of the vat and 36 and 3T are the ends thereof.

6 and 7 represent the brackets or supports for the bearings 8 andl 9 in which, as shown, the supportingmeans for 'the outer cylinder F and inner cylinder D are carlied.

3l is a sleeve revoluble in, bearing 8 which carries a gear 35 by which 'it is driven. Fixed to the inner end of sleeve 34e is one head 50 of outer cylinder F, such cylinder' being of any well known skeleton constructiouhaving at its opposite end a head 5l and its curved surface 52 being cov lered with tine-meshed papermakefs.wire

gauze.' all of well known construction. 10-l0 represents connecting straps which make the outside cylinder more rigid.

rl`he other head 5l of cylinder F around its center has an annular shoe which tits closely and is revoluble about an annular conduit 1T which forms part of bearingI 9 and extends through the wall 3? of the vat. Outer cylinder F is therefore rcvvoluble with 'sleeve 3l and around conduit li.

VAs shown in Figs. l and annttlaicon duitv 1T extends upward at 16 in the form of a tapering hollow bracket and to the top of such bracket 1s rigidly tixed a conveyer 13.

Iwhich is shown as in the -form of a cylinder with one end closed but with a longitudinal opening at 55 from thel bottom of which extends a lip el() which serves as a doctor blade or scraper. as will be described.

As shown. through conveyer 13 extends worm 14: whose shaft 3S extends through arm 4:1 and carries a gear 30 ywhich engages a. gear 3l carried on the inner wall of the right head 50 of cylinder F. As bearing 9 and conduits ltand li' do not revolve.. corrt veyer 13 and scraper i0 are fixed in position and outer cylinder F revolves' around them. Arm il 'is lined to sleeve 4:3 tilted to ,bearing 8 bv arm 42 around which vsleeve 34- revolves.

)ttul rlfhe inner cylinder D is shown as of less diameter and shorter than cylinder F and. revolves inside conveyer 13, being of such ile size that scraper 40 will scrape its curved makers mesh whichmay be finer than that on cylinder F.

Through bearing 9, conduit 17, and nipple 64 extends a clear water conveyer E shown `in the form of'a. pipe with inlets 65 and 66 from the inside of cylinder D. I prefer to make the inlets 65, which are nearer the outlet, smaller than those 66 atthe other end to equalize the flow and `the motion on the surface of the liquid.

represents a -couch rolland K the felt apron of any usual form. Cylinders F and {.Df'nay be driven at 'any desired speeds and *whatever fine stock passes through cylinder F is picked up on the curved 'surface 62 of 'inner cylinder D and as it revolves is scraped i therefrom vby scraper and is carried through conveyer 13 to conductors 16 and 17 and delivered at any point outside the outer. cylinder.

The worm 14 is shown as a positive means for conveying the stock to a point desired,

but it is manifest that other mechanism may be used for this purpose.-

' I prefer to extend conduit 17 downward at 18 and to connect with it means for returning the stock to the top Iof the vat shown as comprising a pipe 19 in which revolves a worm'20 whereby the screened stock is delivered at 21 back into theyvat.

lVorm 20 is-shown` as having a shaft 23 which carries-a bevel gear 22 in engagement with another bevel gear 24 revoluble by means of a sprocket-25 connected by chain 26 with sprocket 27 driven by a gear 28 which engages a gear 29 carried by and extending around the outside of the left end of cylinder F.

In connection with the doctor blade 40 Iy prefer to use water spraying means inside of thefinner cylinder D for the purpose of keeping its meshed surface 62 clean and free. In Figs. 1 and 2, I show a bracket 67 fixed by a set screw 54 to the inner end of nipple 64 and this bracket supports the leftends of spray pipes 68 and 69.

Spray pipe 68 is located parallel with the axis of cylinder D and is in advance of the edge of blade 40 and has holes by which a water spray can be directed under the stock just before it reaches -the doctor blade, whereby the cylinder mesh is clean and the work of the blade is assisted.

Pipe 69 is located beyond the doctor blade 40 and is parallel to 68 and has holes by which a spray can be directed from the inside on the mesh 62 of cylinder D, whereby after the stock is substantially scraped olf by the doctor blade, this spray will clean it still further.

The right ends of pipes 68 and 69 are connected by right angled pipe sections 44 and 45 whichserve to support that end and ex tend radially' from a. hub 46, as shown in Fig. 6, which forms the right end of clear water `conveyer E or is fixed thereto, as shown in Fig. 7.

The spray water inlet pipe 47 is screwed into hub 46 and the ports 48 and 49 communicate from the hub with pipes 44 and 45.

I prefer to provide atwo-way valve in hub 46 having a. stem 56 with ports 57 and 58 adapted to register with ports 48 and 49 and turnable by rod 59 which extends through pipe 47 in' 'any convenient way, as shown in Fig, 2.

By this two'lway valve, water can be directed through either spray pipe 68. or 69,

throughvboth, or can be cut o entirely, as desired.

The clear water conveyer E and spray Water conductor 47 are shown as extending axially through both cylinders. The left end of E is supported in bearing 9, and the right end of 47 may be bent down, as shown at 12 in Fig. 2, and supported 'thereby or supported in any other suitable manner. l

In Figs. 1 and 2, the means to remove the screened stock from the inner cylinder is the doctor blade 40 which may be assisted by spray pipe 68, and 'the means to convey the screened stock to the outside of the outer cylinder are the conveyer 13, worm 14, and

conductors 1,6 and 17.'

'out through bearings 74 and 75 through walls 76 and 77 and may be supported by suitable bearings in supports 78 and 79. The v are shown as driven by a pulley 8O fixed to sleeve 72.

The bracket 67 which supports the spray pipe or pipes is fixed to conveyer E by a setscrew 54.

Insteadof a conveyer .and worm, however, I show a Ytrough 81 which extends from one side to the other of vat A at a slope and empties into a trough 82. The doctor blade 83 at the edge, of trough 81 scrapes the screened stock from the surface of the inner cylinder M andit travels by gravity to outside the outer cylinder and outside the-vat.

The outer cylinder L has annular heads 8l from'gvvliich project flanges 85 which rest` inside' ofand are revoluble: in vflanges SG attached respectively inside'. the lends 76 and 77 ofthe vat.

On the inner side of flanges 85 are Linte. rior `gear teeth 87 which areengagedby.

gears 88 carried by a shaft 89 vvhic-hextends from end'to end ofvthevat between cylinder M and cylinder 'Land may 'be `driven 'which extends from' an inclined trough 91 extending from end to end of the vat where- `by as the partly screened stock is scraped oil. it `trayels by gravity to the out-side of the ratandnis shown as dropping into trough 82.

The. mesh on inner cylinder M is preferably finer than that on outer cylinder L.;

In Fig. el', I show a construction in which the inner cylinder D and its attachments and connections are similar to D, shown in Figs. 1 and 2, and intermediate cylinder F corresponds with outer cylinder F in those views; v

Instead of the couch roll IFI, .hovveVenI show an inclined trough arrangement 81 such as is used ony cylinders M and L, shown in Fig. 3. I Gutside cylindeis vD and F, I show a cylinder L which is supported inside of the tank and is constructed in the samemans `cylinder L. shown in Fig. 3. and is driyen'inthe same Way by interior gear teeth S,T.-'a'ndf"gears SS.4 The screened stock is removed from this cylinder by a doctor blade and inclined trough 91 and is delivered intol another trough 95.

As shown in Fig. 5. troughs 95 and 82 are bent dovvn as vertical conductors and screened 'cylinders might vbe used by suitable adaptation of the manner of supporting them and of conveying theI screened stock from the outside thereof to the outside of the outer cylinder. preferably outside of the vat.

The clear Water conveyer preferablyv eX- i tends out through the' axis of the cylinders.

I claim: l. In a save-all for paper stock t-hecombination with a vat.`and an outer screened cylinder revoluble therein.` `of one or more cylinder to outside the vat, and means to` remove the screened stock xfrom the inner cylinder or cylinders.

2. In a saveall for paperstock, thecoinbination VWit-h avat, and an outer screened, headed cylinder revoluble -therein, of "al f shorter innerrevoluble screened headedcylinder. -an axial clear Water l'ctmyeye'rwhich .passes through tlie'inner cylinder and has'- inlets therefrom. and means to remove vthe screened stock from the inner cylinder.

3. In a save-all forpaperstoclr.thecom'- bination. vvith avat-and an outer, screenedlfv cylinder-revoluble therein, of one or` more t" inner revoluble screened cylinders, affclear Water conveyer which passes from the inner cylinder to outside the Vpaume-.ins to remove the yscreened stock from the 4inner cylinder or cylinders, and .means to conveyf:

the screened stock to inder. y

l. In a save-all for paperstock the conrbinationwith a vat. 4andan outer screened cylinder revoluble therein. of an inner revoutside the outer cyl-i" oluble screened cylinder, a clear vvater con-.

veyer 'which passes through` the. inner cylinder and has inletsl` theretrom. a lscraper v vhich engages the yinner cylinder' and is' adapted to remove the 'screened stock theref from, and al conveyer from said scraper to convey the screened stock avvay fromthe lscraper to outside the outer cylinder.

5. In a. save-all for paper stock the com` bination with a vat, and an outery screened cylinder revoluble therein. of aninner -rev-v oluble screened cylinder. a clear vvater coninder and has inlets therefrom. a scraper 'which engages the inner cylinder and is adapted to remove the screened stock therefrom. a conveyer from said scraper to conL rey screened stock away from "t1lQ,.SC1'aper,'

. U0. veyer Which passes through the innerecylthe conveyer to the/outside of the vat, and

cylinder proximate to and beyond the scraper, and a conveyer from said scraper to convey the screened stock away from the scraper to outsidethe outer cylinder.

9. In a save-allier paper stock the combination with a vat, and an outer/screened cylinder revoluble therein, of an inner revoluble screened cylinder, a clear water conveyer which passes through the inner cylinderv and has inlets therefrom, a scraper which engages the inner cylinder and is adapted to remove the screened stock therefrom, means to spray water from inside the inner cylinder on its screened surface proximate to and 1n front of the scraper, and a conveyer from said scraper to convey the screened stock away from the scraper to outo side the outer cylinder.

' 10.In a save-all .for paper stock the combinationv with a vat, and an outer screened cylinder revoluble therein, of an inner revoluble screened cylinder, a clear water conveyer which passes through the inner cylinler 'and has inlets therefrom, a scraper which engages the inner cylinder and is adapted to remove the screened stock therefrom, a xed spray vwater pipe which enters the inner cylinder axially, a two-way valve therein, two-branch pipes which extend from the two-way valve proximate to and in `1t of and behind the scraper having holes 4screened cylinder to spray the water on the inside o 4 the screened surface of the inner cylinder, and a conveyer from said scraper to convey the screened stock away from the scraper to outside the outer cylinder.

11. In a paper stock machine, the combination of a vat, and a revoluble screened cylinder therein, with a fixed spray water pipe which enters the said cylinder axially, a two-way valve therein, two-branch pipes which extend froml the two-way valve proximate to and in front of and behind the scraper having holes to-spray water on the inside of the screened surface of `the said cylinder.

12. In a save-al1 for paper 'stock the combination with a vat having oppositely disposed bearings, of a fixed spray waterinlet'pipe which 'passes one bearing, a fixed clear water conveyer' which extends ont-through the centerof `the other bearing, one or more spray.. pipes parallel with the clear water Aconveyer supported thereby'and by the spray 'water inlet pipe, an inner screened cylinder revoluble about the spray water pipes, a sleeve fixed thereto concentric with the spray water inlet pipe and extending out through the vat, driving means at the outer end thereof, a scraper outside of the inner screened cylinder carried in supports fixed to the bearings, a conveyer from such scraper to a point outside the vat, an annular shoe revoluble about one bearinga sleeve which extends through the other bearing, and anouter fixed to such shoe and sleeve revoluble outside the inner c lnder and the scraper, together with riving means fixed to the outer end of the last named sleeve.

In testimony whereof I have aflixed my signature.

nl nn'is'rn vv.- LINDQUIs'r.

through the center 1of`

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