US1937125A - Paper making machine - Google Patents

Description

Nov. 28, 1933. .1. P. PEDERSON PAPER MAKING MACHI NE Filed April 10, 1931 3 Sheets-Sheet l Eli/Em Nov. 28, 1933. PEDERSQN 1,937,125

PAPER MAKING MACHINE Filed April 10, 1931 3 Sheets-Sheet 2 506%7 J ZTZ/P/ d/QWSOR Nov. 28, 1933. J, PEDERSQN 1,937,125

PAPER MAKING MACH I NE Filed April 10, 1931 3 Sheets-Sheet 3 Patented Nov. 28, 1933 any I ii E MAR 1940- I 1,937,125 PAPER MAKI G ACHINE Jo'hn Pederson, Chicago, x Application April 10, 1931. serial No. 529,087 2: Claims. (01. 92 14 which greatly reduces the danger of injury to the wire screen and results in a great saving in time and labor, ascompared with the methods heretofore in use. A'further object of the invention is to provide an improved method of operating and 15 manipulating a Fourdrinier paper making machine for the purpose of removing the woven wire screen therefrom-and placing such a screen thereon. The present invention has the further advantage that it is simple in=construction, capable of being readily manufactured, and permits the. changing of the woven wire screen to be simply and easily accomplished,

In paper making machines of this class, the endless wire screen of the Fourdriniermachine must be replacedirequently, and, as wellknown, practically all of the machine must be dismantled, or the massive machine must be moved bodily in a lateral direction from its normal position to permit theremoval and replacement of the screen, thus requiring in this operation the removal of many rolls, suction boxes, trays and the like, either individually, or as a unit, and the subsequent replacement of these parts. In replacing the screens in this manner, it not infrequently happens that j a heavy roll or part of the machine is dropped, with the result thata new wire screen is destroyed in addition to-causing further delay in the changing of the screen and the making of repairs. There amounting to many tons during-the period of a year, because the life of a woven wire screen comparatively short, being from one to eight weeks and averaging about two or three weeks, and it requires from two to four hours of time to change the screen or a machine when the parts are re moved in sections or individually'and about 25% additional time when the Fourdrim'er machine is moved laterally as'a unit. In some formsof paper making machines, the Fourdrinier or, wet end of the machine has been speciallyconstructedso that one or more parts, carrying the operative elements of the machine, are capable'of being rolled out of the machine frame-to provide access tothe working parts so that an old wire screen-can be removed and anew-screen substltutem aiterwhich the parts of the machine may be rolled iback'ginto their normal positions in proper association with the new screen. Suchimprovements are, however, objectionable because' they require the separationof theoperative parts-of the'machine-and (it) because such a construction is'costly andcomplicated and the handling of the wire screen; is-difiis cult even with the aid oft-he specialappliancesiqr handling the screen. Inother formsof machines, porter bars or extension bars are attached to one side of the Fourdrinier', the wire screen is mounted thereon, and then liftingjacks are placed under the ends of these porter bars for the purpose o1 raising the Fourdrinier from the pedestals onwhichione side is supported sothat the wire screen canbe moved into place. Such improvements are objectionable in that these porter bars are neces; sarily so large and-cumbersome to handle, if they are to have sufiicient strength, that they set up stresses in the the machine, especially if the machine is relatively wide, gandrinthat the operation. of removing and replacing thewire screenwith their use is'not capable of being carried on con veniently and rapidly. V

, The presentinvention overcomesthe;difficul 9'0 ties incident to the prior methods and a paratus referred to above and is distinguished by the .fact that all of the working parts of the Fourdrinier machine remain in their normal positions during the removal andireplacement of thendless wire screen. This movement of the screen with the frame and working parts ofthe Fourdrinier machine substantially in their normal positionsis accomplished through the provision of a movable support for the frame and working parts, this 99 support being capable of movement laterally-of the screen -while at the gsame time continuing to v perform its suppcrtingiunction sothat the endis also the additional loss of production of paper,

less screen can be displacedfrom its positionsurrounding the Fourdrinier. and its working parts without any lateralmovement of the Fourdrinier and without the necessity of performing manual operationsupon heavy and cumbersome" parts, In its preferredembodiment, the invention'comprises'means for providing ajmovable support for 100 the frame and working-parts of the Fourdrinier machine and also an auxiliary support for one end of the couch rollof the 'machinei so :that during the movement of the movable support the envelopingscreen, whichfpasses around the rolls and-other moving parts'of-the Fourdrinier, in

eluding-thecouch roll, may'move endwise of these rolls, laterally of the machine, without interfer ence by-any of the parts'yvhich normallysupport I the side of the machine at'which the remqvaland 11D vention is to provide a Fourdrinier machine hav-.'

ing the frame and working parts thereof mounted onrigid supports at one side of the machine and also upon movable carriages capable of being moved laterally on tracks at the other side of the 'machine so that these carriages can be moved laterally n substantial synchronism with the movement of the endless wire screen until a part of each carriage reaches a position'where it supports the machine in a position beyond the center thereof from the rigid supports, after which thexframe and working parts are heldin stable position during the further movement of the screen. The'frame of the'machine is preferably provided with lateral extensions which may serve to coact with parts of the movable carriages until these carriages have passed outwardly to a 'po sitionwherein they provide a stable support for the machine, after-which'these extensions may be moved inwardly to normal positions in order not to interfere with the further free movement of the endless screen. These and-otherobjects and advantages of the invention, relating to details of construction and improved features of the method, will appearmore fullyhereinafter.

The nature of the invention will be understood from the following specification taken'with the accompanying drawings, inwhich Fig. l is a side elevation of the Fourdrinier portion of a paper making machine embodying the improvements of the present invention, the

' parts being shown in their normal operating povention are capable of being applied to various 1 sitions; I i a Fig. 2 is aside elevation of the machine illustrated in Fig. 1 after the parts thereof have been adjusted to permit removal of the'endless wire screen; I

Fig. 3 is a top plan view of the machine 'illus trated in'Figs. 1 and 2-with the endless wire screen removed and'occupying a'position at one side of the machine;

Fig. 4 is an enlarged sectional View taken on the line 4 -4 of Fig.1, showing, somewhat dia-. grammatically, the relation of the parts in their normal operating positions, and a i Fig. 5-is asectional view taken on the lin 5--5 of Fig. 3, showingthe positions of the parts during and at the completion of the operation;

of removing the endless wire screen-from the machine. I 7

Although the improvements of the present'in forms of machines, including various forms of paper machines of the Fourdrinier type, it has been illustrated -in the accompanying drawings, by way of example, in connection with one form 1 of'Fourdrinier machinewhich has been-shown somewhat diagrammatically without attempting to illustrate all those details which do not have any direct bearing on the present invention. As illustrated in the drawings, the invention is shown as being embodied in a machine comprising a frame loin which are journaled the usual table rolls 11, breast roll -12 .and guide rolls l3.

' This frame also carriessuctionboxes' 14 and the connected by a transverse as by the pedestals and the spacer blocks 32.

usual trays and the l ike, located below the table of the frame, for collecting and receiving the water. The rolls 11 and 13 serve to support the upper stretch of the endless woven wire screen 15 which is usually formed of copper. The paperstock iiows over the upper run of this endless woven wire screen and is discharged thereon from a screen board 16 which receives stock from the I head box 17.- The apron board ldjis hinged at 18 so that it may be swung upwardly when desired.

The lower run of the screen 15 is engaged by the guide rolls i9 and 20' and also by the tension guide roll 21 which is supported by pivoted arms 22 and capable of adjustment by devices 23 so that the tension exerted upon the screen may be varied to draw the screen taut to the desired extent. screen passes around the couch roll 24 which at oneside of'the machine is journaled in a station-.

ary bearing while at the other side it "is journaled in a bearing 25 carried by a bracketZfi which is adjustably mounted upon one 'end of the frame 10 bybolts 27. I

The main frame 10 of the machine is provided with cross frame members 30 which, on the far side of the machine, as shown inFi'gs. & and 5, are rigidly mounted on pedestals 31. At the forward side of the machine, these cross frame members may rest upon spacer blocks 32 whichin turn are supported on stationary pedestals 33,

thus providing a rigid support forthe frame of the Fourdrinier machine during its operation. In addition to the supports just referred to, the frame 10 is provided with two supporting car riages 35 which comprise two wheeled sections At the discharge end of the machine, the

bar 37. Each section 36 comprises a triangularly shaped truck frame or V casting upon which are journaled two pairs of lower'jrollers 38 and an'upper roller 39.- The lower rollers 38, two of which are located on each side of each truck frame, are adapted to travel on trackways 40 formed in or carried by the concrete base it upon which the pedestals 31 and i 33 are secured. The upper rollers 39 of each carriage section are adapted to coact with the under sides of the transverse frame members 3!) of the frame i0, it. being understood that one carriage 35 islecated normally beneath each frame member 30. The bar 37 of each carriage is pivotally connected to the upper portions of the truck frames of the sections '36 of that carriage and when the carriages are in their innerinostpositionsas shown'in Figs. 1 and i, the upper rollers 39 coact with the under sides of the bars 30 adjacent to the pedestals 3i and 33 so that the frame leis then supported by the carriages as well a similarmanner, the inner bearing of the couch roll 24 is mounted'upon a fixed pedestal while the outer bearing may be supported by a spacer block 42 mounted upon a'stationary pedestal Whenthe parts are in their normal positions as shown in Figs. 1 and i, the endless wire screen 15 passes around the frame 10 and parts carried thereby and also around the couch roll 24 with the lower stretch thereof occupying a position above the-bars 37 of the carriages and between the pedestals 31 and-33. These pedestals are recessed to receive the inner edges of the frames of the carriage sections when the carriages are in'their innermost positions.

For the purpose of effecting lateral movement of the carriages 35 along thetracks ll) beneath the frame 10, the innermostgcarriage sections 35 are provided with blocksie which are threade'dly item-at pinion 52 fixed on the shaft of an electric motor 53. This motor is provided with a'suitable starting device and controlling circuit, not illustrated, by which it may be operated either direction, as desired, in order to effectthe simultaneous rotation of the two screw shafts 45 for thepur pose of moving the carriages 35 inwardly or outwardly with respect to the pedestals 31.

In order to provide a continuing support for the frame 10 of the Fourdrinier machine during the outward movement of the carriages 35, the transverse frame members 30 are provided with extensions 30 which are connected to the outer ends of these frame members by vertical pivots or hinges- 54. The outer ends of the body portions of the frame members 30 are further provided with downwardly projecting cam surfaces 30 for a purpose hereinafter describedyand the lower surfaces of the extensions 30 of the frame I members 30 may preferably-be in the sameplarie 1 with the lowermost part of'the cam surfaces 30 When the rollers 39 of the outermost carriage sections 36 pass beneath the cam surfaces 30*, the

upward force exerted upon the outermost edge of the frame 10 relieves the pressure upon the spacer blocks 32 and 42 and these blocks may be manually withdrawn from their positions on the pedestals 33 and 43. As the outward movement of the carriages 35 continues, the outer part of the frame 10 issupported by the engagement of the outermost carriage rollers 39 with'the extensions 30eof the frame members 'which are then extended outwardly as shown by full lines in Fig.4. As theoutermo st carriage 'sectio ns'- 36 reach a position beneath'the'outer. ends o'fthe extensions 30 of the frame members, as shown by dotted linesin Fig. 5, the supporting rollers 38 of these outer carriage sections 36 pass downwardly onto a depressed portion 41 of the tracks,

, thus leaving a space between the outer rollers 39 and the same extensions 30 through which the endless woven wire screen 15 may be withdrawn laterally. By the time the outer rollers 39 reach this position, the innermost rollers 39 will have reached a position at or beyond the centers of the frame members 30 so that the frame 10 and the.

couch roll 24 will then be supported in a stable position without the presence of the spacer blocks 32 and 42 and without any support being provided by the rollers 39 of the outer carriage sections.

Above the table rolls 11 and the upper stretch of the wire screen 15, there are mounted the usual deckle straps 60 which pass around the guide wheels 61 and 62' which, with the deckle frame 63, are normally supported upon the main frame of the machine, as shown in Fig. 1, with the lower runs of the deckle straps traveling along the edges of the wire screen. This deckle strap structure may be elevated to a position above the screen and the table rolls, as shown in Fig. 2, this operation being effected in any'suitable manner, as by a crane or hoisting apparatus provided with the hooked links 64 and 65 which may be detachably connected with the deckle frame'and with the shaft vof the rear guideroll 62, respectively, so that the apparatus may be suspended above the rolls and wirescreen during the operation of removing and replacing the screen.

When the wire screen 15 is to" be removedfrom the machine, the deckle straps and their guide rollers are' elevated'as shown in Fig. 2 and the feed table 1-6 is swungupwardly against the head box 17. After lowering the tension roller 21,;as shown in'Fig. 2, to relievethe tension on the wirescreen '15, the auxiliary-wire remover rolls" '70 are inserted through the end portions of the endless wire screen 15 adjacent the breast r011 12 and the couch roll 24; These auxiliary wire remover rolls are each mounted as shown particularly in Fig. 5, where each roll is shown connected to a traveling hoist. "After each 'roll '70 isinser'ted-through the endless wire apron, the' ends of the roll areconnectedby pins 71 to hang' ers 72 which extend downwardly from a spacing rod '73-havin'g rings 74 mounted at the ends thereof for connection with hooks 75 depending from the tackle blocks '76.- These tackle blocks are provided with the usual pulleys and the hoisting cables 77 are-passed around'these pulleys and also around the pulleys 78 which are carried by hangers '79"provided with rollers 80 arranged to travel on the'track rails 81 extending transversely of and above the machine; v After the auxiliary remover rolls 70'have been inserted, the operators of 'the'machine pull upon the cables 7'7 to elevate the-end portions of the endless wire screen 15 out of contact withthe breast roll and the couch roll, asshown in Fig. 2. Thebearing of the outer'end of the couch roll releases its pressure on the spacer block 42 when the carriages push upwardly on the outer'portio-ns of the frame 1 0 on'which the bearing bracket 26 imou'nted, and this block is then removed, leaving the outerendof the couch roll 24 supported entirely by the bracket 26, which in turn is'supported upon'the end of the'end o'fthe' couch roll for the removal of the endlesswirescreen at this end of .themachineif The" next step in the operationof preparing to remove the wire screen'l5 is to swing the au'xiliary frame members 30 outwardly to the posi-,- tions shown by fulllines in Fig.4. The electric motor 53 is then started ina direction to cause the supporting carriages 35 to move" outvmrcu toward the-screen removal side of the machine and, at the'same time, the ODBIELtOIlIlOVBS the hoisting apparatus, by whichthe removerrolls '70 are supported, along the rails 81,-in the same j direction. 'As the outermostrollers, 39 of the; carriages 35 engage the cam surfaceS'BOF of the frame members 30, theframe 10 is elevated released to permit the removal of these spacer,

blocks. The operator then continues the out} ward movement of the carriages 35 by the oper;- ation of the motor 53 while simultaneously continuing the'outward movement vof the wire screen,

supported on the auxiliary roll 70, and during this movementthe lower stretch of this screen passes over the upper ends of the pedestals 33 while at the sametime the outer portion of the 7 frame 10 and parts carried thereby are supported by the "engagement of the outercarriage rollers 3'9 with the under sides or the frame extensions 115 the frame 10. Thisleaves a free passage overapparatus and withdrawn from the wire screen plished by inserting the rolls '70 through the new hoisting apparatus along the rails 81 and the 30%., When a point is reached where the innermost supporting rollers 39 have" reached points slightly beyond the centers of the frame men1-. hers 30, measured outwardly from the pedestals 31, the frame 10 will be supported in stable. position by the inner rollers 39 of thec'arriages and the pedestals 31 without the necessity of deriving any support from ,the outer rollers 39 of the carriages. The tracks 40 areftherefore so arranged that, at this point in the movement of the carriages, the outer carriage sections 36' pass downwardly onto the depressed portions 40 of the tracks as shown by the dotted line position of the carriage 35 in Fig. 5, thus providing a space between the outermost rollers 39 and the auxiliary frame members 30* which may then be swung inwardly about their pivots 54 to the po-si-. tions shown by full lines in Fig. 5. There is then provided a'free'passage for the outward move; ment of the wire screen 15, and the operator'then continues the outward movement of the carriages 35 and 'the outward movement of the remover rolls'70 until the carriages 35. reach the positions shown by full lines in Fig. 5. The rolls '70 and thereby so that the hoisting apparatus maybe operated to lower the rolls 7Q'until the wire screen rests upon the bars 37 of the carriages. The rolls YO'arethen removed from the hoisting to permit its removal and a new endless wire screen is then unrolled inposition over the bars 37 of the carriages preparatory to placing this new screen 'on' the machine, This is accomscreen, elevating the end portions of the screen by the hoisting apparatus until these end portions align with the breast roll 12 and the couch roll 24, and then reverse the movement of the movement of the carriage 35 along the tracks il as well as the couch roll 24. 'movement of the apron progresses, theframe extensions 30 are swung outwardly into align-f to causethenew screen to move laterally and enclose the frame 10 and parts carried thereby, As this inward ment with the body portions of these frame members so thatwhen' the screen has passed beyond 6Q? ,7 1 so that, when the carriages 35 reach their final inner positions, shown in Fig. 4, the outer por-,

the ends of these extensions 30*, these extensions will be engaged by the outer rollers 39 as the outer carriage sections 36 ride upwardly onto the elevated portions of the tracks 40. The inward movement offthe screen is continued in synchro nisrn withtheinward movement of the carriages T 35.with the outer rollers 39 supporting the frame extensions 30 and during this time, or while the outer rollers39 are in engagement with the cam surfaces 30?, the spacer blocks 32 and 42 are re-' placed upon the pedestals 33 and a3, respectively,

tion .ofthe frame 10 is lowered automatically onto the spacer blocks 32, and the bracket 26 is lowered ontothe spacer block 42, asthe outer rollers 39 pass out of engagement with the cam surfaces. The frame extensions 30 are then folded inwardly to the positions shown-by full lines in Fig. 5 and the deckle strap structure is lowered to the normal position shown in Fig. 1, after having lowered the apron board l6. The

tension roller21 is then elevated to put the wire screen under tension and the parts are again in readiness for operation. Of course, where the w'ir'escreen is to be discarded after removal, it

may be cut transversely onthe machine while it is still occupying a positio'n over the table rolls 11, iniorder to facilitate its removal without the necessity "of employing the remover rolls '70,."a1- though, in many instances, it may be preferable to use the remover rolls regardless of the disposition which is to be made of the screen which is removed. p 'It willbe apparent that this invention"pro-' vides a method of removingan'endless wire screen from a machine, such as a paper machine of the Fourdrinier,type, .without'lateral movemerit of the machine itself and without disassembling any of the parts of the machine, except for the removal of the spacer blocks 32 and 42. It may bejfound desirable toeliminate the use of the outer pedestals 33 and the spacer blocks,

32, depending entirely upon the carriages35 for to provide a firm support for the outer end of the carriage roll during its normal operation.

Although one method of practicing thepresent inventionhas been illustrated and described 7 in Connebtionwith the application of the invention to one particular form of Fourdrinier paper machine,"it will be understood that the invention may be appliedto machines of thisand other types, and may be practiced in various ways,

withinthe scope of the appended claims.

.I claim:

The method of removing an endless wire 1l5" screen'from amachine ofthe Fourdrinier type, which consists in providing a movable support and. a stationary support for the machine, and moving the movable support laterally with the screen.

. 2. The methodof removing an endless wire screen from a machineof the Fourdrinier type, which consists in providing a movable support and a stationary support for'the machine, andmoving the movable support laterally with the screen while maintainingthe machine in fixed connection with said stationary support. v I 3. The method of removing an endless wire screen from a machine ,of the Fourdrinier type, which consists in, providing 'a movable support and a stationary support for the machine, and moving the movable support laterallylwith the screen until the screen is free of the machine while maintaining the support of said -machine by said movable's'upport. f g efThe method of removing an endless wire screenfrom a machine of the Fourdrinier type, whichconsists in providing astationary support for one side of the frame of the machine and a movable support engaging 'saidjframe at two points on opposite sidesv of the lower, run of said screen, and moving said screen and said movable support laterally of saidframe until saidscreen is free of said machine. 7

5..Thel method of removing an endless wire screen from a machine of the Fourdrinier type,

' which consists in providing a stationary support.

dling' the lower run of said screen, and simultaneously ,moving said screen :and said movable support laterally-pf ;said machine while maintaining the support of said machine by said stationary support and said movable support.

6. The method of applying an endless wire screen to a machine of the Fourdrinier type, which consists in supportingsaid machine on one side by stationary supports-rand on the other :side by a movable support having a pair of machine supporting parts between which said screen is placed, and then moving said movable support andsaid screen inwardly until both of said supporting parts arep-in supporting engagement with said machine and until said endless screen "envelops said machine. l

7, The method of removing an endless wire screen from a machine of the vFourdrinier type, which consists in raising the *deo'kle straps and associated parts. above the roll. supporting frame and the rolls'thereofreleasing the tension in the endless screen andraising the end portions thereof from the breastroll and couch roll of the maohine supporting, said machineon one sideby a stationary support and on-the other sideby "a movable support, removing the stationary supports from said other side of said machine to provide a free opening for the passage of said screen,- and then moving said screenglaterally through said opening and simultaneously'moving said movable support to maintain the support of said machine on saidiother side.

8. The ,method of removing and replacing an endless wire "screen from a machine of the Fourdrinier type, whichconsists in raising the deckle straps and associated parts above the roll supportingframe and the rolls thereof, releasing the -tension in the-endless screen and-raisingthe end portions thereof fromthe breast roll and :couch roll .of the machine, supporting said machine on one side by-astationarysupmrtand on the other side by a-movable support, removing the stationary supports from said other sideof said machine to provide a free openingfor the passage of said screen, thenmovingsaid screen aterally through said opening and simultaneously moving saidmovable supportto maintain the support of said machine on said other side, then replacing the removed screen by :a new endless screen, then moving said new screen and said movable support inwardly until said screen encloses the rolls and frame of, said machine, then setting up tension in said screen, and restoring said deckle straps and associatedparts to their normal operating positions;-

9; A machine-of the Fourdrinier-type compris ing a frame having abreast roll, guide rollers and suction boxes-mountedth'ereon, a couch roll located at one end of said frame, stationary sup ports for one side of said frame and one 'end ofsaid couch roll, stationary supports for the other side of said frame and the other end ;of said couch roll including removable partsfadapted to provide a freepassage-through which an end-.

less wire screen may-be removed or inserted into a position surrounding said rolls and rollers, and

a movable, support for said frame adapted 'to travel transversely of said frame to provide a continuing support for said other side thereof during the operation of removing and replacing said endless wire screen.

10. A machine of the Fourdrinier type com--' prising a frame having a breast roll, uide rollers and suction boxes mounted thereon, a couch roll located at one end ofsaid frame, stationary supports for one side of said frame and, one end of said couch'roll, stationary supports for the other side of said frame and theuother'end'of said couch roll'in'cluding removable parts adapted toqprovide a free. passage through'which an endless wire screen may be-removed or inserted into a position surrounding said rollsand rollers, a movable support for said frame adapted to travel transversely of said frame 'to provide'a continuing support for said other side thereof duringtheope'ration of removing andreplacing said endless wire screen, and an 'extensionzfo'r said frame-adapted to 'maintain the :support or said frame on said movable support when-said wire screen may be removed or-inserted into a position surrounding said rolls-and rollers,-and a movable carriage mounted normallywbenea'th said frame and having parts adapted "to support said frame onopposite sidesofthe lower run "ofsaid wireflscre'en, said carriage being-adaptedto be moved laterally of said' machine-simultaneously" with the movement of i said wire screen for maintainingthe support'of said frame at the side thereof on whichxsaidwire screen is removed and replaced. l2. A machine 'of the Fourdrinier type "comprising a frame having a breastrolhguideirollers and suction boxes mountedthereoma couchroll located: at on'eend of saidzframe, stationary supports for one side of saidframe and-.one' end of said couch roll,stationary supportsfor the other side of said .frame anduthe other=eiid of said couch roll including removableparts adapted to provide afree passage through which;an endless wirescreen ,may be removedzor' inserted into a position surrounding said .rolls and rollers, I a movable carriage mounted normally beneath said frame and having partsadapted tO'SllPPDIti-Sfiid frame on opposite'sides" of "the lower run'rof said wire screen, said: carriage -being adapted "to :be moved laterally of said machine simultaneously with the movement-of said who screen'for maintaining the support of said frame at the side thereof on which said wirescreends removed and replaced, and ahinged extension for saidframe adapted to be moved outwardly to cooperate. with said carriage when said carriage is projected be yondthe ends of the rolls of said'machine.

, 13; A machine of the Fourdr-inier type compris-' ing a frame having a breast roll, guide rollers and suction boxes mounted thereon, 'acouch roll located at one end of said frame, stationarygsupports for one side of said frame and one end of said couch roll, stationary supports for the other side of said frame and the other end of said couch roll including removable parts adapted. topro- 'vide a 'freepassage through which an endless wire screen may be removed 'or inserted-into a pb'sition surrounding said rolls, and rollers, 'a movable support for said frame adapted to" travel transversely of said frameto provide a continuing support 'for said othersidethereof during the operation of removing'andreplacing said end-v less wire screen, and means for supporting. said i th endof said couch roll upon said frame lafter has been withdrawn.

the removable portion of its stationary support wire screen may be removed or inserted into a position: surrounding said rolls and rollers, a

movable support for said frame adapted to' travel transversely of said frame to provide a continuing support for said other side thereof during the operation ofremoving and replacing said endless wire screen, and a bracket mounted on said frame and carrying a bearing in which is journaled the end of said couch rollover which said wire screen'is removed and replaced.

15. "A machine. of the Fourdrinier type comprising a frame having a breast roll, guide rollers and suction boxes mounted thereon, a couch roll located at one end of said frame, stationary supports for one side of said frame'and one end of said couch'roll, means for supporting the'other end of said couch roll on said frame, and means for supporting'the other side of said frame.

16'. A machine of. the Fourdrinier type comprising a frame having a breast roll, guiderollers and suction boxes mountedthereon, a couch roll located at one end of said frame, stationary supports for one side of said frame and one end "ofsaid couch roll, means for supporting the other end of said couch roll on said frame, pedestals located beneath the other side of said-frame and theother end of said couch roll, and spacer blocks'inserted between said pedestals and said frame and said bracket. i

17. A machine. of the Fourdrinier type comprising a frame having a breast roll, guide rollers and suction boxes mounted thereon, a couch roll located at one end of said frame, stationary'supports for oneside of said frame and oneend'of said couch roll, means for supporting the other end of said couch roll on said-frame, pedestals located-beneath the other side of said frameand the other en'd ofisaid couch roll, spacer blocks inserted between said pedestals and said frame and said bracket,'and means for.releasing' the pressure of said frame and said bracket upon said spacer blocks to permit the removal and re placement of said blocks. a 1 r I 18:,A machine of the Fourdriniertype comprising a frame'carrying operating parts of said machine; said frameand said parts being adapt ed to be surrounded by an endless wire screen, means forsuppo'rting said frame at one side of said ,wire screen, pedestals'located at the other side of said'frame, spacer blocks interposed between said pedestalsiand said frame, a pair of carriages movable-transversely of said frame and adapted to-provide'an auxiliary support for said frame duringtheir movement, and power oper, ated means for effecting the simultaneous move- 11181113 of said carriages transversely of said frame.

'19. A machine of, the Fourdrinier type comprising a frame carrying operating parts of said machine, said frame and said parts being adapt" ed-to be surrounded by endless wire screen,

means for supporting said frame at one side of wire screen,lp'edestals located at the other side of said frame, spacer blocks interposed 'be- 1 tween said pedestals and saidL-fr'amaa pairof sides of the lower 'runof said screen. 7

means for supporting said frame at one side of said wire screen, pedestals located at the other. side of said frame, spacer blocks interposed be tween said pedestals and said frame, a pair of carriages movable transversely of said frame and adapted to provide an auxiliary support for said frame during their movement, said carriages having supporting parts engaging said frame on opposite sides of the lower run of said wire screen, means for simultaneously moving said carriages and said wire screen transversely of :said frame after said spacer blocks have been removed, extensions for said'frame' adapted to rest'on-said carriages after said carriages have been projected beyond the side of said frame, and means for causing parts of said carriages to be depressed at predetermined points to provide openings between the outer portions of said'carriages'and said frame extensions.

21. The combination with a machine of the Fourdrinier type, of meansfor supporting one side of said machine, and a movable support for the other side of said machine-adapted to permit the removal laterally of an endless wire screen carried by said'machine, said last named support being mounted for movement laterallyof said machine simultaneously with said endless wire screen while maintaining a moving point of support for said machine. 1 r I Y v22.-The combination with a machine of the Fourdrinier type, of means for supporting one side of said machine, a movable support for'the other side-of said machine adapted to permit the removal laterally of an endless wire screen carried by said machine, and rollers carried by said movable support and coacting with the frame of said machine.

23. The combination Fourdrinier type including a frame carrying op-' erating parts of said machine, said frame and said parts being adapted to, be surrounded by an endless wirescreen, of a movable support for said frame, a track-for said support, and rollers carried by said support to coac't with said track and said frame. t l

'24. The combination with amachine of the Fourdrinier type including a frame carrying operating parts of saidmachine, said frame and 1 said parts being'iadapted to be surrounded by an 135 encfless wire screen, of means forsupporting said I frame at one side of said screen, and a movable support movable transversely of said machine I and having parts engaging said frame on opposite with a machine of the c 25. The combination with a machine of the Fourdrinier type including a frame carrying operating parts'of said machine, said frame and said parts being adapted to be surrounded by an endless wire screen, of means for supporting said frame at oneslde of said screen, and a carriage movable transversely of said machine and having' rollers engaging said'frame on opposite sides o'f'th'e lower run of said; screen; a 26. The' 'combination with a machine of J the Fourdrinier type including a frame carrying operating parts of said machine, said frame and said parts being adapted to be surrounded by an endless wire screen, of meansvfor supporting said frame at one side of said screen, a support movable transversely of said frame, a track for said.

support, rollers carriedby said last named support to travel on said track, and other rollers carried by said last named support to coact with said frame on opposite sides of the lower run of sa Wire screen. 1

2'7. The method of removing an endlesswire Joan 13.v .BEQERSQN

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