US911469A - Pulp-screen. - Google Patents

Description

BOYD.` V

PULP SCREEN. ArrmoATIoN IIILED 1220.4, 19o?.

Paten'd Feb. 2, 1909.

Tij-1 Arrow/EVS sauras Parnnr carton Briton WILLARD Bern, ornEAnsBoao,

'rute-sonnen. i

y No. 911,469.

Be it knownthat I, BYRON W Born, a vcitizen of theUni-'ted States, and a resident foi Readsboro, 'in the county of Bennington and State of Vermont, have invented a new V.Spe'ccation ef Letters Patent. application sled Daoemter 4, .1907. serial No. assess.

and Improved Pulp-Screen, of which the tol- 'lcwmgfis 'a iull, clear, andexac't description.

ilhi's invention isan improvementin pulp-screens of a sim le and com act nature,

adapted to'eec'tive y and rapi ly separate thecoarse product of pulp vfand such similar materials from the fine pulp4 and water, by centrifugal action. l u

f'Tfhe invention further' resides in certain special `features of 4construction and combi- '.nationfof' parts aswill behereinaft'erlparticu-- 1an described andsetforth in the c' aims.4

. ference is to be had to the accompany- Y drawings forming a partei this specication, in'whlch similarcharacters of reference indicate `ccfirrespending' parts in -both views.

Figure- -'1,is.a central verticalv section 'through apul-pscreen vemhoelyin my inven- V yis Ia sectionon t eline 2&2 lofflig-,l,looking in the direction of the arrow.

ln vthe vcor'is'truction of the lmachine-any k'smi'table ibase 5 is employed,"to`-which are rigidly ixedby boltsorother suitable means,

standards 6, spaced a `art and carrying bear-- ings at their u peren s, in which Ais'journaled 4a substantial y Ihoriz'ontallyfarranged shaft 7, the vlatter -being provided at one end with the usual loose and xed pulleys 8 and 9 resrlectivel andat its 4opr'rosite, end is slig radial openings 10 at `the inner portion :nigieliy attached to the' .Shaft i715 hat@ the standards 6,:.is the-screen proper, which is-econicalfotm and consists @of fa Ihead 11 vtion with the screen. -The sp1der-. 12 has an inwardlyf,

and a spider-12,'v connected together at or tly en argedand of hollow form as ine'. f dicafted at 9, and provided lwith 'a seriesof near their perimeters 'by a .serles of per-l forated plates 13. `The head ,11 surrounds the slots in the hollow portion 9a of the shaft 7, and is constructed with a number fof curved channels, each registering with one of said slots, as shown in li'ig. 2, and discharging in an annular groove 14 near the circumference of the head in. communicaperforated Vportion of the i projecting Hangin-.15, arranged at an inclinaytion `to 'correspond with the taper of the screen, andto which'the several perforated secure Patented-Feb. l2, rece.l

'l' plates 13 areatt'ached. These plates, esalso the vtlange, are vprovided with a series toty 'elongated openings orslots 1.6, which *facilitate the discharge of the coa-rser :portionswf the pulp, es ecia ly such-as lodgefagainst the spokes'ott e spider.4 l p The perforated :plates '1-3, -as best seen in Fig,`'2, are each slightly xoil-set at .one edge and overlap the next adjacent plate, :,at which' oints they are' riveted or otherwise dptog'ether and to .the head and spider of the screen. Surrounding this screen, and y "outlet 20 4by' an inwardlysprojecting 4flange l21 ,the latterextendingto near the perimeter of the screen and to the right ofthe openings 16, whereby the discharge through these openings will pass into theoutl'et 19.

. Above thescreen a water supply pipe-22, passes into the casing'and hasga perforated .under side to rovide a 'shower to keep the screen-free and) clear during theo'perationof the machine. `At the enlarged'encl of the dcasing a door 23, preferably hinged at .its

--upper ed provides access Within'the-casing and to lt e screen forv inspection, cleaning, Aand other urposes.y v f 'lhepu pv is introduced into the hollow portion-of the shaft 7 through a pipe 24, and

. substantially conformjng-thereto, isa rcasing 17,'rigidlyattached to t thence passes through the 'slots 10 and vregistering channels of the head 1 1, ,the latter .discharging into the screen through the annular groove; this travel of the pulp bein enforced by the centrifugal force develo e by the revolution of the screen. watery ortionor slivers of thepul will be' forced tlirough the perforations of t e screen underv centrifugal action, and the coarser portions ofthe pulp will pass out between the spokes of the spider and the slots 16. The flange 21 will prevent any intermingling of the screened and' coarser products o the pulp, and the said products will pass out through their respective outlets to the re uired points of dlscharge.

hev mach-ine may be either used for screening the pulp or for thickening the same, the operation in both cases being the same; for thickening the pul however, the

perforations in. the screen s ould be very small to allow the passage of the water only therethrough.

The invention as shown and described while embodying the preferred practical construction of my improved pulp screen, is nevertheless susceptible of modifications falling within the scope of the invention as dened in the claims annexed. p

Having thus described my invention, I claimv as' new and desire to secure by Letters Patent:

l. In a pulp screen, a revoluble'conical screen, -a head forming the small end of the screen, having an annular groove in its inner face and providedl with channels passing through the center thereof to said groove, means for introducing pul in the channels of said head, and means or revolving the screen.

4 2. In a pulp screen, a screen comprising -a head having an annular roove in lts inner face, with passages dist` arging into said groove from the center of the head, a spider spaced from said head and having a flange projectin from one side thereof, and perorated' p ates forming the circumference of the screen, secured to the head and fiange `of the s ider.

. 3. n a pulp' screen, a conical screen. having the axis thereof substantially horizontally disposed andwith the enlarged end thereof open, said screen havinga series of enlarged openings therein. adjacent to its enlarged end, a -casing surrounding the screen, havingy an outlet for receiving the` materialv passing through the enlarged end o f the screen and said enlarged openings and an outlet for receiving the 'material passing through the screen openings, means for introducing the pulp in the small end of the screen, andl means for revolvingthe screen.

4. In a pulp screen, a substantially horizontally-arranged shaft having a hollow portion, a screen havin a head provided with a series of radiating channels communicating with the hollow portion of the -the screen.

shaft and discharging into the screen, means for introducin the pulp into the hollow portion of the s aft, and means for revolving the shaft.

5. In a pulp screen, a substantially horizontally-arranged revoluble screen having a head provided with an annular groove in its inner face, with a series of curved channels discharging from the center of the head to said groove, means for introducing the pulp into said channels, and means for revolving the screen.

6. In a pulp screen, a shaft having al hollow portion, a screen carried by the shaft,

`having a head provided with channels communicating with the'hollow portion of the shaft and discharging into the screen, a casing surrounding the screen, having outlets for the discharge of the materials, means for introducing the pulp into the hollow portion of the shaft, means for revolving the shaft, and a shower pipe located within the casing over the screen. l

7. In a pulp screen, a substantially hori- Azontally-dispcsed shaft having a hollow portion, a screen attached to the shaft, having a head provided with passages dischar ing said outlets and the material passing through the enlarged end of the screen and the enlarged openingsl throughA the other outlet, means for introducingthe pulp in the small end of the screen, and means for revolving In testimony whereof I have signed my

Images