US1446154A

US1446154A - Beater for paper stock

Info

Publication number: US1446154A
Application number: US438966A
Authority: US
Inventors: Ralph S Clarke
Original assignee: Bird Machine Co Inc
Current assignee: Bird Machine Co Inc
Priority date: 1921-01-21
Filing date: 1921-01-21
Publication date: 1923-02-20
Anticipated expiration: 1940-02-20

Description

'Feb.20,1923. I 1,446,154; f 1 n. s. CLARKE. y

BEATER /FOR PAPER STOCK.

FILIED muzi, 1.921 l z'sMEETs-sHx-:ET

Feb. 20, 1923.

R. S. CLARKE. BEATER FOR PAPER sTocK.

FILED IAN. 2|, |921.

2 SHEETS-SHEET 2'.

Patented Feb. 20, 1923.

UNITED sTATss PATENT OFFICE.

RALPH S. CLARKE, OF WALPOLE, MASSACHUSETTS', ASSIGNOR TO BIRD MACHINE COMPANY, A CORPORATION F MASSACHUSETTS.

BEATER ron PAPER sTocK.

Application filed January-21, 1921. Serial No. 438,966.

T o allwhom t may concern.

Be it known that I, RALPH S. CLARKE, a citizen of the United States, residing at Walpole, in the county of Norfolk and State of Massachusetts, have invented certain new and useful Improvements in Beaters for Paper Stock, of which the following isa specification. f

This invention pertains to beaters for paper stock and more particularly to those of the continuous type wherein a rotating screen or cylinder is employed to remove the finer or graded stuff.

The main object of the present invention is to provide means for agitating the cylindrical screen, or, in other words, to impart a vibratory motion to the screen in addition to the usual rotary movement about its axis, such, vibratory movement causing a more ready inflow of the stuff into the screen and likewise acting to keep the Screen openings clear.

A further object resides in the provision of means for regulating the outflow from the screen, such means being present in the shape of a box into which the screened stock Hows,

the box being provided with suitable dam boards.

The machine is illustrated in the annexed drawings wherein:

Fig. lf/'s a top plan view of a portion of a beater with my improved screen applied thereto, together with the flow boX; f

Fig. 2 a vertical sectional elevation on the line II-II of Fig. 1;

Fig. 3 a transverse vertical section on the lineIII-III of Fig. 1;

Fig. 4 a detail sectional View on the line IV--IV of Fig. 5 of one of the eccentrics employed for raising the screen supporting arms; and

Fig. 5 a like view on the line V-V of Fig. 4. Y

In said figures 1 denotes the usual tub having a mid-feather or partition 2. The screen 3 is of cylindrical form having a closed head 4 adjacent the partition 2 while its opposite e-nd is open and provided with a spider frame 5. The screen is secured to and rotatable with a shaft 6 journaled in suitable bearings 7 secured to a pair of I .spaced levers or

arms

8 and 9. Said arms are fulcrumed upon a shaft or rod 10 which in turn is mounted in brackets 11 secured to a cross bar or timber 12. 'Rotary motion is imparted to the screen from a driving pulley 13 through a sprocket chain 14 passing about sprocket wheels 15 and 16 respectively. The

arms

8 and 9 incline upwardly toward their outer ends, see Fig. 2, and overlie a shaft 17 *.journaled in suitable bearings 1'8. Beneath yeach of the

arms

8 and 9 the shaft is provided with an eccentric 19 about which passes a strap 20, the latter terminating in an upwardly extending bifurcated arm 21 beneath the elements of which extends the lever or

arm

8 or 9, as the case may be.

through pin 22 forms a connection between the lever and eccentric strap.` Motion is im parted to shaft 17 and consequently to theA eccentrics 19 from a belt pulley 23 which is driven from any suitable source.

Located beneath each lever is a buffer or bumper, shown as formed from a block of rubber 24 having an overlying metallic cap 25 adapted to coact with a screw 26 adjustably mounted in the lever. Said buffers, as

portion of its open side into a valved discharge pipe 27 which empties into a box 28, the latter being provided with one Lor more The screen discharges through the lower -the levers are lowered, are put under comdam boards 29 which control the level of the screened stock within the screen. For the most eicient operation of the machine it is found desirable to determine the correct level and then hold such level through the use of a dam board of proper height.

In operation the stock is caused to ow through the tub in the Ausual manner and vdirection and a rotary motion is imparted Such bodily raising coarser particles from the screen openings as the Screen. is raised. rl`he raising and dropping of the screen is 'independent of or in addition tothe continuous rotary motlon of which the screen partakes and is foundl impractice to materially raise the efficiency of the screen. As the gc entries near their limit of downward movement the screws 26 come in contact with the striker blocks v25 and cause a com ression of the underlying rubber block 24. Il`his arrangement prevents undue jar of the parts which might othprwise occur upon the falling of the frame, and also serves to assist the initial upward movement of the frame under the actionof -the eccentrics. The compound movementy of the screen,I to-wit, its rotary movement about its axis and the up-and-down movement through the stream of stock as it is passed aroundl through the tub causes an inflow of the graded stock through the openings (which arel coextensive of the screen surface but only partially so shown), to a degree much more rapid than where the screen is alone rotated.

It is to be understood that in so far as the generic invention is concerned, to-wit, raising and lowering the screen whilen'mparting rotary motion thereto, any mechanism which will 1mpart such dual motion may be employed, though that shown is simple and efficient.

What is claimed is,-

1. InY a beater for paper stock, the combination of a tub; a hollow screen mounted upon a horizontal axis, said screen being located in line with the run of material through the tub; means for rotating the screen about its axis; and means for raising and lowering the screen while the same,n

'the screen and simultaneously imparting to it an up-and-down movement.

3. In a beater for paper pulp, the conlbination of a tub; a hollow, perforate screen mounted for rotation about a horizontally disposed axis, a portion only of the screen being submerged in the material passing through the tub; means for rotating the screen about its axis; and means for bodily raising and lowering the screen, whereby the screen is caused to surge down into the stream of material passing in contact therewith.

4'. In a beater for paper stock, the combination of la tub; a frame hinged at one end in line with the run of material through the tub; a hollow screen carried by said attenta periodically raised and lowered and a surging action of the same produced in the stream passing in yContact' with' the screen. 5. In a beater 'for paper stock,v the combination of a tub; a frame pivotally sup-. ported at one end; a shaft carried by the frame; a hollow screen carried by the shaft, the lowerportion of the screen extending down into the path of the stream of material passingthrough the tub; means for rotating said screen; an eccentric mechanism for raising and lowering the outer end of the frame and consequently imparting to the screen an up-and-down motion in the stream.

,GQ lin a beater for paper stock, the combination of a tub; a pair of levers fulcrumed at one end; a shaft mounted in bearings on the levers intermediate their ends; a. hollow screenmounted upon the shaft, the lower portion of the screen extending into the tub and into the path of movement of tl stream passing therethrough; means for rotating the shaft and ,consequently the screen; a second shaft mounted in fixed bearings supported upon the tub; a pair of eccentrics carried by said shaft, one beneath-,each of the levers; straps connecting said eccentrics with said levers; and means for rotating said shaft and the eccentrics andthereby impartin an up-and-down movement to the screen. g. In a beater for paper stock, the combination of a tub; a pair of levers fulcrumed at one end; a shaft mounted in bearings on the levers intermediate their ends; a. hollow screen mounted upon the shaft, the lower 100 portion ofthe screen extending into the tub and into the path of movement ofthe stream passing therethrough; means for rotating the shaft and lconsequently the screen; a second shaft mounted in fixed bearings supwe ported upon the tub; a pair of eccentrics carried by said shaft, one beneath each of the levers; straps connecting Asaid eccentrics with said levers; means for rotating said shaft and the ecoentrics and/thereby im- 11o parting an up-and-down movement to thel screen; and a buer locatedin each lever, said buffer coming into action when the leve-rs near their limit of downward movement.

8. ln a beater for paper stock, the combination of a. tub; a frame pivoted atene end; a hollow screen rotatably supported upon said frame; an eccentric mechanism for raising and lowering theframe; and a 12o buffer cooperating with the frame, said buffer coming into action as the frame nears its limi of downward movement. f .Y 9. lin a.V beater for paper. stock, the combination of a tub; a hollow screen rotatably 125 mounted with reference thereto and adapted to have its lower portion submerged in the stream of stock passing through the tub, one side of the screen adjacent the outer portion of the tub being open; :in outflow we ipe extending from the tub adjacent the ower portion of the screen; and a flow box intoy which the pipe dischar es, said box being provided with means or "maintaining 5 the level of the stock therein "and consequentl Within the tub. f

10. a beater for paper stock, the combination of a tub; a hollow, perforate screen having its lower portion submerged in the tion transverse to the flow of material past stock flowing through the tub; and means 10 for imparting a movement to the screen about its axis and simultaneously imparting a bodily movement to the screen in a directhe screen. p

`In testimony whereof I have signed my name t0 this Specification.

RALPH S. CLARKE'.