US1774195A - Tub beater - Google Patents

Description

Aug. 26, 193,0. R. H. BREYFOGLE 1,774,195

' TUB BEATER Filed Feb. 3, 1927 2 Sheets-Sheet l 1 Z576 of@ f Zvw/f -v Aug. 26, 1930.

R. H. BREYFOGLE TUB BEATER Filed Feb. 3, 1927 2 Sheets-Sheet 2 Patented Aug. 2e, 1930 ROYQBREYFOGIQE. 0F V.tirar-111iJeifilaila mleieAN:

' fffrif BEK-PEF? l' *Appiietion'mea February 3,1927. serial No.y iesgssaj i i The present improvementsfrelate more particularly to a beater ofthe continuous type for reducing stock to'pulp, commonly knownas a tub beater. A Y Y l -5 The invention relates-more specifically to tub beaters of the continuous type in 4which pulp which has been'reduced to'the desired size or inen'ess, is continuously withdrawn from the moving mass .of pulp in the beater,r

' i0 while regulated quantitiesof fresh charge are added,l either continuously or intermittentlywithout interrupting the continuous operationofthe machine.

In its more specific embodiment, the yinven-kvv 15 tion comprises a perforated plate forming part of, or placed in the hood `normally disv posed over the'beater roll, through `which Vthe pulp, which hasbeen reducedto the degree of neness desired is dischargedby thecen-k 20 trifugal rotary action of the beater. d

As a feature ofthe present invention,' this perforated plate is disposed immediately above, or on the same side of thebeater roll as the usual back fall.l l

25. The advantage accruing to the placing of this perforated plateon the same Side ofthe roll i* as is located the back fall., is that the maxif d .35AV force.

Pulp passing through s'aidperforatedplat'e7 is withdrawn through a discharge pipe communicating with the usual stuff chest or other obvious instrumentality.

4Q Many other-'objects and advantages will be more particularly apparent from the followvr y f .andin any'event; aredisposed on thejsamefing descript1on.` y d y In the drawings, Fig. l is anenlarged top plan vieuT of a tub beater equippeddwitli my 45; invention. n y l Y Fig. 2 is a partly side elevational view and partly a crosssection` taken on line'2-2 of Fig. l. i y l Referring more in detailzto the' drawings, l EOirepresents the usual tank of al tub beater beatingz'r'oll fhavingitsupper outer end car-w y 1., 6,5# the ""centerzlineof said roll; from.` whence itwhich isprovidedvwiththeusual mid feather y 2 'of suitable length.A Ashaft 3 `rotated -by means of power imparted tothe pulley'pwheel U l carried thereby pr'oje'cts-across the interior efthetubi'and onenesiaeqfthe miafeatheif 55 Qcarries the beaterfroll v5. Y VThis beaterfroll 5 is provided'withfthe.usualfcutting knivesV 6 I Y projecting fromits surfac'e5` and designedito coactvwith a fixed member fsu-pported'in the customarymanner'at thebottom of the' tank 60Q by means'of'the support* 8. The back fallv 9' extendsV .upwardly r adj acent to, but i at an increasingidistancefrom the4 surface of 4the *y ried.toavheightapproximately at kthe level of extends baok'wiardzat an approximate angle ofy v about' deg'rees'tr theibo'ttom ofthe tank@` 'Ilhis backffall 9 is of anyf'standar'di const'ruction.y c, 21A. hoodIO is. suitably supported on the upd per annular edge of the tank l, which hood c may befof" anyshapeordesign as willbe found most-:suitable and convenient.` vThis hood vmay. be provided ywith therings 11, 'for '.757, l f

the purpose' of permittingfraijsingby suitable instrumentality. 'The hood is provided'with sidewalls 12, whichv defi-nea space intwhich "pulprilslfreceived and 'discharged throughA v leither of the dischargey pipes 13 .to a suitable V80," -stuff chest or other instrumentality. Y

l' As a `feature ofthe present inventionyon the same sidev of the* drum `5 as islocatedthe .y back fall 9, I provide abovesaid back fall a perforatedplate-lil. Thisplate lll` has perl 85.*. c

forationsjl,4 the sizel and number vof which arefpredetermined to permit only the pulp n which has been yreduced to the desired fine- Vness and size Vto pass therethrough.. The per- Y forations 15 in this plate 14 'are ]g re`ferabl5f` .90 disposed immediately above :the back fall '9,

side yofthe beater roll as t'lieback fall 9ffor the purpose ofaltiliziiig thecentrifugalV force set up by the-rotationrof the beating roll-,tocause d the pulp toj be thrown upwardly against .l the under surface fofy the plateffatwhich time the: n pulp. rwhichl has. been reduced to desired'size,

passes through the perforations.v It is obvi-V ous thatthereisa minimum of loss of force by Af .y

v ceiving an excess of pulp, the valve comprisf ing the weir gate 16 may be manipulated t0 clear the opening 17in an end rwall ofthe hood thus permitting the overflow to pass int-o the conduit 18 which returns said pulp to the mass in the tank 1.

I am aware that heretofore, beaters of the contin.uoustype have been known in the prior art. I am also aware that the prior art disgclcses continuous beaters utilizing a perforated back fall and utilizinga-perforated plat-e onthe opposite side of the beater roll from that on which the back fall is located in combination with anelem'ent for removing the larger pieces which might adhere to the perforated surface.v

The present invention has obviousadvantages thereover, among which may be pointed out the greater capacity due to taking advantage of the maximumcentrifugal force set up by the revolving beater roll 5,y and the eliminationof the necessity forinechanical scraping' or cleaning refuse, that is the foreignwmatter of larger size Ithan theperforations,` which is objectionable inthe particuyliar grade of stock which it is desiredto prouce. It has been found in use that the centrifn remove said larger size particles `from they surface of the perforated plate. vThe insuiiiciently reduced pulp is thrown back into the ybeatingengine' while the suiciently reduced fibres pass through the perforations and on to the stuff. chest. The operation is continuous, and highlyefiicient.

I claim; asmy invention:

1. A pulping machine.comprising a beater tub. a beater roll mounted for rotation in said tub. a back fall on one side of said roll and slightly spaced'therefrom, aperforated strainer element mounted in the upper portion ofsaid tub on the back fall side of said roll and disposed directly over the spacebetween said roll andback falhv and means for conducting away thekinaterial discharged through said element. y

2. A pulping machine comprising a beater tub, al beater roll mounted for rotation in said tub, abackfall von one side of said roll and slightly spaced therefrom, a perforated plate mounted in-the upper portion of said tub on the back fall side of said roll and dis-V posed directly over the space between said point beyond the top of said back fall, and I `means on the side of said plate opposite the roll for conducting away material discharged r through the plate.

ROY H. BREYFOGLE.

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