US2421272A - Papermaking apparatus - Google Patents

Description

May 27, 1947. H. T. KNEAREM 2,421,272

PAPER MAKING APPARATUS Filed Nov. 18, 1944 s sheets-sheet 1 May 27, 1947, H. T'. KNEAREM PAPER MAKING APPARATUS 3 lSheets-Sheet 2 Filed Nov. 18, 1944 Pw Wim. y QN.

J2ee/fem;

A tto rn ey:

May 27, 1947. H. T. KNEAREM 2,421,272

PAPER MAKING APPARATUS v Filed Nov. 18, 1944 3 Smets-Sheet 3 I nventor aaa/Wawy MZW y Patented Mey 27, i947 OFFICE PAPERMAKING APPARATUS Harry T. Knearem, Dallas, Tex., assignor to Gerald T. Shipman Application November 18, 1944, Serial No. 564,100

3 Claims` A further object of the invention is the pro vision of such a mechanism adapted to vary the speed of the calender rollsy through the position of a belt connection of 'a two-part cone clutch, the position of the belt being governed-by the tension of theA paper as fed to the calender rolls.

A still further object of the invention is the provision of such a device which may be automatically operated in accordance with the position of a roll between thedrier and the calender stacks.

A more specific object is the provision of such automatic means for controlling the position of f the belt between the pulleys of the cone clutch in association with a manual means for controlling such position, means being provided whereby the automatic control may be readily and simply shifted to manual, or vice versa.

A still further object is the provision, in association with the roll between the drier and the calender stacks of a tank containing fluid adapted to serve as a counterbalance for the roll in such manner as to control the tension required to lift the same, whereby the automatic speed control is operated.

An additional specic object of the invention is the provision of means in such a iiuid-filled tank adapted to Apreclude the sudden shifting'of the fluid in such manner as to cause vibration in the roll, such as might be occasioned by minor jerks or vibrations in the driving mechanism.

Other objects reside in the combinations of elements, arrangements of parts, and features of construction, all as will be more fully pointed out hereinafter and disclosed in the accompanying drawings, wherein there are shown two preferred embodiments of this inventive concept.

In the drawings:

Figure 1 is a diagrammatic side elevational view, certain parts thereof beingindicated by dotted lines, of one form of apparatus embodying the instant inventive concept.

Figure 2 is a view similar to Figure 1 but showing certain related parts thereofY in section, certain of the parts being omitted.

Figure 41s a diagrammatic side elevational view of a modified form of construction. Like reference numerals refer to like parts throughout the several views of the drawings.

Having reference now to the drawings, and more particularly to Figure 1, there is generally indicated at I0 a drying roll rotatably supported by any suitable type of supporting brackets II, over which a strip or sheet of paper I2, to be dried and calendered, passes to a calender stack generally indicated at I3. The calender lstack is comprised of a plurality of rotatable rolls I4, mounted in vertical alignment on supports I5 of any suitable type, the paper I2 being adapted to pass on opposite sides of successive rolls and eventually to exit from the lowermost roll, as at I6, from which it may be passed to any desired source, such as another stack of calender rolls, or the like. l

The lowermost of the calender rolls I5 is provided withan axle I on which is mounteda bevel gear I8 adapted to coact with a bevel gear I9, mounted on the extending shaft 20 of one pulley 2I of a cone clutch generally indicated at 22. The other pulley 23 of the clutch, connected to the pulley 2| as by a belt 24, is adapted to be driven in any' suitable manner, as by a sultable motor 25. The pulleysZI, 23 are shown in exaggerated form for the'purposes of illustration, and are mounted on any suitable supporting frame 26.

From thelforegoing, it will be readily apparent that the speed of rotation of the `calender rolls is governed by the position of the belt 24 with relation to the pulleys 2I and 23. A belt shifter v 30, comprised of a bracket having iianges overlying the sides of the belt 24, is mounted for slidable movement on a pair of rods 3I secured to the frame member 26, and extending slidably through suitable apertures in extensions 32 comprising a portion thereof. Set screws 33 are provided to hold the rods against movement, -for a purpose to be more fully described hereinafter. The extremities of the rods 3I terminate at one end in a block 34 secured to a piston rod 35. Thus it will `be seen that when the piston rod 35 is moved in a manner to be described more fully hereinafter, and the set screws 33 are released to permit slidable movement of the rods, the belt shifter 30 may be moved thereby toefect movement of the belt 24, and consequently govern the speed of the calender rolls.

The opposite ends of the rods 3l also terminate in a block 36, through a suitable smooth bore in which extends a rod 31, the outer extre ty of which is provided with a hand wheel 38a.nd the' inner extremity of which is threaded, as'at 39.

As best shown in Figure 3, the threaded end 39 of the rod 31 engages a suitable threaded bore 40 extending between the depending tongues of the belt shifter 30. y

Thus itwillbe seen that wheni the setscrewsw 33 are loosened: in the.` manner previously described, the entire'ass'ernbly, includingthe'iro'd" 31 and the hand wheel 38, may be readily moved by the piston rod 35, but that conversely when the set screws 33 are tightened, the rod 35andg, g

its associated rods 3I are held immoyable, land the belt may be shifted by rotationof the hand adjust the same is so slight as to provide a subq, stantia'lly automatic continuous speed control for the calendefvrolls, maintaining a desired tension wheel 38, such rotation through the threaded end 'l 39 and the threaded bore 40,:Veiecting fa transe* S verse sliding movement of the member 38 along f maintained substantially constant. Obviously, a

the rods 3l. y,

Referring now to the automaticcontrol feature ofthe `device,a v'roll 45` is rotatably mounted on arms 46, at a position above t'hes'ection` of sheet-` opaperIZextendng betweenthe drier roll ".I`0y

and the calenders'tackIS.' vThe arms'146- are piv-Vv Y otally' secured, as by'pivots 41;"to a suitable bracket 48,an`d 'a counterbalan'ce arm49 extends fromv thefoplzio's'it'e extreinityv of l'the rod-'46 and terminates in'a'counterbalance rtank 50.;y 'As best shown; i. in Figurey 2, counterbal'ance ytank4 5045 is comprisedv of ia receptacle provided with'a plurality of'i'nteli'f rirly`positioned partitions A5l,""- eac h of 'whi'ol'iz isprovidedwith a smallaperture-52 adiacenti the; 1

base'th reof, the purpose A,and function of 'which f.

will' be here Afully described hereinafter. i

5t' ontineqjm l a cylinder 51 From" the upper and lower portions 'of cylinder 51 tubes or pipes' sa"v nid 5s; respectively, lead of a second cylinder 60,within which'is positioned therefronia"counter-weight 13A. *y K lFromtheforegoing; the operation of 'the device shouldnowbe readily understandable. Thecyl-y inders 5f! Land `60 -ar'e normally maintained' filled' witnnuie, fromltnejtanksr, the nino pressure 'being maintained 4automatically ,by the countei weight13wijlenY the valves54 andfiGUSare opened.

within@ parte injtneposinon shown in Figurer,- the belt24 is substantially centrallypositioned on dingdownwardly' from the axle offro'il'er pistonj'rod '55 adapted to operate-pistoni to the opposite endsa piston III ,operai;ively` connected tothe' 'piston' the` cone clutch.I However, when the calender rdlls are moving"y too'slowly and a slack or derision` inj thepaper occurs, asindicated fin dottedlins inlFgrure 2, lai sag: is` effected yin the paper, wherel= 4upon 'the 1*'011'14'5 drops' downwardly and-forces thewpist'pn; 5 6 downwardlywithinlthe cylindery 51.

This'oc'casionsa forcing of fluid throughfth'e pipe 59","into the cylinder jwhich in turn moves-the pristlo'n'land the piston rod v35 toshift the block 34, the rod 3|, thek belt shifter. ilILa'nd` hence ',the belt 24, in a direction toward theflaifg'e'r 7diameter o'f the. ,driYe'Plllley' 2.3. Aand the Smaller diameter zfminner thatthegweght of the roll 45, or the effectiveApressure thereof against the sheet I2, is

greater force ls requiredfgto lift the roll from a higher` positon -thanffrom a.A lower position with respect tothe drier rollgandcalender stack. This forcefis: oiset fby; `the, counterbalance 5I), since, when the roll is in its-higherposltion, the pivotal relation ofthey.;counterbalance with relation thereto iis :suchgthat v,agreater force is exerted thereby, due: uto the i inclination thereof, and the relative positioning ,of `the iiuid lcontained thereing thanzwhen the` roll is-in its lowerv position. Thus the `variation kof-t-he pcsitionlngof the iiuid inthe counterbalancef50-serves-to vary the effective;weightfthereof. The partitions 5I lpermit; byameans-fofgthe apertures 52, a ready flow offuid fromA onefend` ofthe device to the other y as'ftheanglel of inclination is shifted, butpreclude jerksvand'jarsbeingimpartedto the roll 45 thereby,'due'to minor lvibrationsof the mechanism, such asl thelmounting bracket 48 occasioned bythe operatingfmachinery of the plant,

A In` Figurelif a modifiedA form,A of; lstructure is disclosed, including a. drier .roll I5v mounted on suitable supports 'I6 adapted to guide a strip ofztpapergllato `a suitable'calender stack. (not shown-)'simila'r to the'v calender-V stack I3. The f calender'fstack is driven by'a cone'clutoh 18 'including-fpulleys 18 'and '80 provided with a connecting belt8l substantially identicalto the pulleys 2I -and-'23'andthe'bellt 24. The pulleys are supported in a suitablelv mounting 4bracket `82.

l The' belt? shifting device shown in this modification is'comprised v'ofla' flange member 83, to one side cfwhich'vis'connectedfa tension spring 84, the other "endiof which,"85, is-suitably secured to onefof 'thef'rame-members 82," Secured to the otheiside ofth'ebelt 'shifter' 83`is a flexible mem- 'ber86 such as a cord or rope, adapted to pass overlap'ulley {81'fn'iounte'dlin any suitable fashion, an'diextendsfupwardly to the axle of a'roll 8S adapted torideion the portion of the paper sheet l the belt linfra 'manner At'oinc'zrease the speed of the rollers,I whereupon, when the tension' is increased suiiicien'tly'td raise-'the :roll 88,' the cord or rope 86 biases the belt'shifter 83 in the opposite directionagainst'the tension of the spring Y"Now," from thel yforag'oing, it will be'seen that there is herein provided a construction accomplishing all of the objects of this invention and others, including many advantages of great practical utility and commercial importance.

As many embodiments may be made of this inventive concept, and as many modications may be made in the embodiment hereinbefore shown and described, it is to be understood that all matter herein is to be interpreted merely as illustrative and not in a limiting sense.

I claim:

1. In apparatus for manufacturing paper, the combination of a paper drying roll, paper calender rolls, means for driving said calender rolls, automatic means controllable by the tension of a sheet of paper passing from the drying roll to the calender rolls, the means including a third roll supported by said sheet. operating mechanism governed by the position of said third roll and a counterbalance for said third roll, said counterbalance including a pivotally mounted, iluid-illled tank having a plurality of spaced, substantially Vertical partitions therein, each of said partitions being provided with an aperture in the lower portion thereof, whereby relatively slow ow of liquid from one end of the tank to the other in accordance with the position thereof is permitted, said partitions precluding sudden surges of fluid when the tank is jarred by the operating mechanism,

2. In a. paper manufacturing apparatus, in combination, a paper drying roll, paper calender rolls, driving means for said calender rolls, automatic means controllable by the tension oi a sheet of paper passing from the drying roll to the calender rolls, said automatic means including a third roll engaging and movable by said sheet, operating mechanism governed bythe position of said third roll and a counterbalance for said third roll, said counterbalance being pivoted intermediate its ends and having one end secured to said third roll and the other end supporting a fluid containing tank, a. plurality of compartments in said tank and communicating means for eifecting a slow now of liquid from one end of said tank to the other to vary its center of gravity but preventing sudden surges of fluid therein.

3. In a paper manufacturing apparatus, in combination, a paper drying roll, paper calender rolls, driving means for said calender rolls, automatic means controllable by the tension oi'a sheet of paper passing from the drying roll to the calender rolls, said automatic means including a third roll engaging and movable by said sheet,

operating mechanism governed by the position of said third roll and a counterbalance for said third roll,-said counterbalance being pivoted intermediate its ends and having one end .secured to said third roll and the other end supporting a fluid containing tank, a plurality of compart- -ments in said tank and communicating means for effecting a slow flow of liquid from one end of said tank to the other to vary its center of gravity but preventing sudden surges of fluid therein, said tank extending longitudinally of said counterbalance, said communicating means effecting shifting of the center oi gravity longitudinally of said counterbalance.

HARRY T. KNEAREM.

REFERENCES CITED The following references are of record in the iile of this patent:

UNITED STATES PATENTS

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