US822599A - Pulp-screening machine. - Google Patents

Description

PATENTED JUNE 5, 1906.

'iNo..822,59 9.

L: W.-GO0DRIGK. PULP SCREENING MACHINE.

APPLIQATION FILED FEB. 19. 1906.

4 SHEETSSHEET 1.

(145 6 434 W PQL PATENTED JUNE 5, 1906.

' E. w. GOODRIGK.

PULBSGRBENING MACHINE. nrucuxon rILBfi rm. 19. 1996.

v4 SHEETS-SHEET 3.

'5 av i mlllll hereby declare that FEE TATESEAE OF ONE'HALF TO APPLETON WISCONSIN.

MACHINE COMPANY, OF APPLETON,

PULP-:SCREENING Mam-ems.

Specification of Letters Patent.

Patented June niece.

Application filed February 19, 1908. Serial No. 301,841.

To aZZ whom it may conceive:

Be it known that I, EDWARD WILLIAM Goonnrox, a citizen of the United States,-

and a resident of Appleton, in the county vof.Outagamie and State of Wisconsin, have invented certain new and useful Improvements in Pulp-Screening Machines; and I do the following is a full, clear, and exact description thereof.

My invention has for its obj eat to im rove the efficiency of the simple, economica an durable pulp-screening machines set forth in my Patent No. 815,421, granted March 20, 1906, said invention consistin in what is herein shown, described, and c aimed.

Figure 1 of the accompanying drawings represents a side elevation of my improved pulp-screening machine, partly in section; Figs. 2 and 3, transverse sectional views of the machine, respectively indicated by lines 2 2' and 3 3 in Fig. 1 and Fig. 4, a plan view of aid machine, partly in horizontal section.

Referring by letter to the drawings, A indicates each of a pluralityof standards connected to a girth B, and a frame C is bolted or otherwise rigidly secured on the standards Surmounting the girth, as shown in the patent aforesaid, or cast in one piece with the same, as herein shown, is an oil-box D, provided with bearings for a driven shaft E, and fast on this shaft at suitable intervals there-i of-are cams F, opposing friction-blocks G, that are each in connection with a coupling H, attached to one end of a horizontal springbar I, the other end of this bar being clamped iii-connection with the upper extremity of an inclined arm J, made fast at its lower extrem- -ity'to a side of the girth aforesaid. The arm J is herein shown provided with a lug b, that engages a notch in an edge of the oil-box, and socketed in said arm-lug is the lower end of a .rod K, that extends through'the coupling and springbar aforesaid. Arranged on the rod against the coupling is a spiral s and the tension of the spring is regu ated by a nutc on the screw-threaded upper end of 'i said rod against an interposed washer d, the

construction and arrangement of parts thus far described and a pitman H in connection with each coupling being similar to what is set forth in the previous application as being common in the art to which my improvements relate.

of the pans.

Bolted or otherwise fastened to the upper end of each pitman H is a depending center shank e of a pan M, having parallel under ribs f, bolted or otherwise secured to spring stay bars N, that are fastened at their ends to back-lugs of flow-chambers O in the frame O aforesaid. As stated in the former application, spring stay-bars in connection with sa d frame and a vibratory device are common in the art but the flow-chambers hereinafter more particularly described are novel features of the improved machine. in con.3unc tion with the pan that constituted ,an espetial feature of the predecessor machine and which is the same in said improved machine, except as to details herein specified. Each pan-is preferably recessed at each end to provide a pulp-outlet g therefrom at a suitable elevation above the bottom; but it may be 'made with but one such outlet at the pre ferred end thereof. Each elevated outletend portion of the pan straddles theanner upper edge of a flow-chamber O to insure against loss of pulp over the inner upper ed e of saidhamber, and, as in the former app 1- cation, the bottom of each pan is provided with an endless inner flange it, having the function hereinafter specified.

As in the patent aforesaid, a screen-frame P is supported on the frame C of the machme, and a pulp-vat Q rests upon said screenframe. Likewise, partly inclined and partly vertical endless flanges s of the screen-frame depend into the underlying pans below the outlets of same, preferably outside the inner bottom flanges h of said pans, and said screenframe is also provided with depending bars t, notched to give clearance for the flanges h The screen-plates R are fastened to the ends, sides, bars 15, and divisionbars a of their supporting-frame P by screws or other suitable means the same as in the former application.

The bottoms of the pans of the improved machine are beveled at the sides and provided with depending flanges c, that extend down into troughs arranged transversely of the machine. The troughs S at .the ends of the machine are shallow andcommunicate with flowchambers, and the remaining deeper troughs T are each arranged between a pair of pans, all of said troughs being-suitably pitched. The troughs T discharge into a flow-box O,

in bolt connection with the machine-frame at one side of same, and another flow-box U, of less dimensions than the one aforesaid, is shown in similar connection with the opposite side of said machine-frame. The bottom of the flow-box U is at a higher level than that of the flow-box O and in communication with the troughs T aforesaid. The ends of these troughs extend through apertures in the sides of the machine and are suitably packed therein to prevent leakage from the flow-boxes. Outer hook-brackets i of the pulp-vat Q engage links it in connection with e ebolts m, that extend through upper outer ug extensions n of the troughs T, and clamp-nuts p are run on the bolts to oppose the lugs.

In practice water is run through the screens ahead of the pulp to accumulate in the pans to a depth that will form a seal between said pans and the depending flanges e of the screen-frame, and vertical vibration is imparted to the aforesaid pans by rotation of the shaft E of themaclnne. Pulp from the vat is sucked through the screens incidental to downward motion of the pans, and reaction is had on the pul in said vat incidental to upward. motion of said ans to prevent said screens from clogging, ackflow of pulp from'the space between the pan-walls and depending flanges of the screen-frame being retarded by the flan es h on the bottoms of the aforesaid pans, a l as described. in the application aforesaid. The depth of the material in'the pans may be increased to a variable degree by suitable damniing of the outlets of said pans.

The machine herein set forth is of the plurel-pan variety in which it is advantageous to discharge the screened pulp from the ends of the pans into flow-chambers having lower outlets into the flow-boxes adjacent to the bottoms of same, whereby provision is had for a smooth continuous flowage without agitel-tion of the'material accumulating in said iip'wboxes. Another advantage of the flowlltamb ers is to give air an opportunity to es cape from the screened material, this air having mingled with said material while the same w ts being drawn through the screen-plates by the action of the vibratory pans.

Due to agitation of the pulp in the vibratory ans when the machine is running there is sp ash or spraying of the material against the under side of the screen-frame, and in the absence of the transverse troughs S T some of this material will be lost because of drip of the sameoutside of the pans to the floor upon which the machihe is set. In the improved machine the material caught in the troughs finds its way to the flow-box 0 either through flow-chambers in communication with the troughs S ordirect through the troughs T,

eeasee being kept about two-thirds full of stock. It is practical and within the scope of my invention to omit the flow-box U and have one O aforesaid. It also follows that the machine may be of the one-pan variety and. organiz-ed to have all the advantages of the lural-pan type of machine'herein particuarly described whether of the two" or single flow box type, provision being had for col? lecting into flow-troughs the material that would be otherwise wasted by splashing or spraying against the under side of the screenframe to drop clear of the sides of the pan.

1. In a pulp-screening machine, a vertical vibratory pan provided with one or more outlets, a screen-frame having an endless flange dependin into the pan, and flowtroughs arranger to catch material splashed or sprayed from the pan.

2. In a pulp-screening machine, a vertically-vibratory pan having an inner endless bottom flange and rovided with one or more flange depending into the pan adjacent to said bottom flange of same, and flow-troughsarranged tocatchmaterialsplashedorsprayed from the pan.

3. In a pulp-screening machine, a vertically-vibratory pan provided with one or more outlets at a suitable elevation above its bottom, a screen-frame having an endless flange depending into the an below the outlet or outlets of same, an to catch material splashed or sprayed from the pan.

4. In a pulp-screening machine, a vertically-vibratory pan having an inner endless flange on its bottom, and rovided with one or more outlets at a suitab e elevation above its bottom, a screen-frame havinglan endless flange de ending into the p an below the outlet or out ets of the same; adjacent totthe b0t tom flange thereof, and flow-troughs arranged to catch material splashed. or splrayed frlom' the pan.

flow-troughsarranged 5. In a pulp-screening machinei'a plurality of vertically-vibratory pans each 1 rovidedj with one or more outlets above its b ttom, a screen-frame having a plurality of. endlessl flanges each of which depends into a pan be-; low the outlet or outlets of same, and flowtroughs arranged to catch material splashed or sprayed from the pans.

6. .In a pulp-screening machine, a plurality of vibratory pans each provided with one or more outlets above its bottom and having an endless inner flange on said bottom, a screenframe havin a plurality of endless flanges each of whic depends into a pan below the uoutlet or outlets of same adjacent to the bottom flange thereof, and flow-troughs ar-- l more outlets, 'a 1 o" ranged, to catch material splashed or sprayed from the'pans.

a pulp-screening machine, a vertically-,vibratoi'y flpan r'ovided with one or ow-c amber arran ed to recelve m'ate'rialk'from each outlet the pan and of itself provided with a lower outlet into a flow b'ox, and a screen-frame having an endless'flange depending into the pan.

a pizlp-screening machine, a verti- ;cally-v1bratory pan provided with one or more outlets and an inner endless bottom flange, a flow-chamber arranged to receive or sprayed from the pan.

the material from each outlet of the pan and of itself provided with a lower'outlet into av flow-box, and a screen-frame having an endless flange depending into the pan adjacent to 10. In' a pulp-screeningmachmd-a vertically-vibratory pan provided with one or more outlets and an innerendless bottom flange,- a flow-chamber arranged to receive the material from each outlet of the pan and of itself provided with a lower outlet into a flow-box, a screen-frame having an endless flange depending into the pan adjacent to said bottom flange of same, and flow-troughs arranged tocatch material splashed or sprayed from the pan. v

11. In a pulp-screening machine, a vertically-vibratory an having elevated outlet. ends and depen ing side flanges, flow-chambers having up er edges thereof straddled by said outlet en s of the pans, flow-troughs in which said side flanges of the pans have lay, and a screen-frame having an endless fl dnge depending into the pan. 12. In a pulp-screening'machine, a lurality of vertically-vibratory pans each aving elevated outlet ends and depending side flanges, flow-chambers having upper edges thereof straddled by the outlet ends of the ans, flow-troughsin which said side flan es iave play, and a screen-frame having a p u- 'rality of endless flanges each of which depends into a pan below the outlets of same, 13. In a pulp-screening machme, a vertimaterial from the an-outlets, opposite flowflow-troughs communicating with the flowning int-othe pans below their outlets and adcally-vibra'tory pan having elevated outlet.

ends, depending side flanges and an endless inner flange on its bottom; flow-chambers having upper edges thereof straddled by the outlet ends of the an, flow-troughs in whlch said side flan es of screen-frame aving endless flanges depending into the pan adjacent to said bottom flange thereof and below the outlets of same. 14. In a pulp-screening machine, a lural ity of vertical vibratory pans each navmg elevated outlet ends, depending side flanges and an endless inner flange on its bottom; flow-chambers having upper edges thereof straddled by the outlet endsof the pans, flow-troughs in which said side flanges of the pans have play, screen-frames having endess flanges depending into the pans adjacent to'said bottom flanges thereof and below the outlets of same. I

15. In a pulp-screening machine a l'urality of vertically-vibratorypans each aving end outlets, flow-chambers arranged to receive material from the Jan-outlets, o osite flow-boxes longitudinal y of the mac me at different levels and with which the flowohamberscommunicate, transverse flowtroughs connecting the flow-boxes, other transverse flow-troughs communicatin with flow-chambers, the arrangement of al the flow-troughs being such as to catch material splashed or s rayed from the pans, and a screen-frame aving an endless flange depending into the pans belowthe outlets of same. I

16. In a pulp-screening machine a plurality of verticallywibrat'ory pans, each having an end outlet, and an inner endless bottom flange; flow-chambers arranged to receive boxes longitudinal y of the machine at different levels and with which the flow-chambers communicate, transverse flow-troughs connecting the flow boxes, other transverse chambers, the arrangement of all the flowtroughs being such as to catch material splashed or sprayed from the pans, and a screen-frame havlng endless flanges dependj acent to their inner endless bottom flanges.

In testimony that I claim the foregoing I havehereunto set my hand, at Appleton, in the county of Outagamie and State of Wisconsin, in the presence of two witnesses.

EDWARD WILLIAM GOODRICK.

the pan have play, and a

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