US1387954A - Pulp or paper machine - Google Patents

Description

H. E. TIDMARSH-l PULP 0R PAPER MACHINE. APPucAIioN FILED 020.9. 1919.

1,387,954.. Patented Aug. 16,1921..

5 SHEEiS-SHEET 2.

3 wuentoz atto/mman H. E. TIDIVIARSH.

PULP 0R PAPER MACHINE.

` APPLICATION FILED DEC.9, 1919.

1,387,954. Patentemug. 16,1921.

5 SHEES-SHEET 3- H. E. TIDMARSH.

PULP 0R PAPER MACHINE.

APPLICATION FILED DEC.9, 1919.

Patented Aug. 16, 1921.

5 SHEETS-SHEET 4 M y M @Ittozma E PWM@ Mw@ VM H. E. TIDMARSH.

PULP on PAPER MACHINE'.

APPLICATION FILED DEC. 9. 19|?.

1,387,954, Patented Allg. 16; 1921.

5 SHEETS-SHEET 5- llllllllllllllll Il l Tjliuulllllwwgliluwlll y @Hozmeis v STATES PATENT oFF'lcE.

' HARRY E. TIDMARSH, or BANGOR, MAINE, A'ssIGNoR or ONE-HALF To UNION IRON WORKS, OF BANGOR, MAINE, A CORPORATION OF IMIAIII'IEP.

:PULP on vParma MACHINE.

Be it known that I, HARRY E. TTDMARSH, a citizen of the United States, residin'of at Bangor, in the county of Penobscot, -tate of Maine, have invented certain new and useful Improvements in Pulp or Paper Machines; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertans to make and use the same.

This invention relates to improvements in the ymanufacture of paper and pulp, andl more particularly to improvements in wet machines for converting pulp into webs and sheets and for removing therefrom the greater portion of its contained moisture.

In the manufacture of paper pulp into webs and sheets, the first problem, after the web has been formed, is to eliminate the water. In the manufacture of paper this is accomplished in twodistinct stages. In the -irst the water is squeezed out; in the second it is driven out by heat. In the manufacture of pulp where the final product is a sheet one quarter ofy an inch or more in thickness the use of heat is impracticable and reliance must be placed Von pressure alone. The more water removed the .greater the percentage of actual pulp in the marketed product, which means a saving in transportation charges per unit of dry pulp and a reduction in the freight chargespaid for the transportation of water. Clearly then,

the more water pressed from the web the better.

The common practice is .tol pass the newly formed webl between pressure rolls, but because of its tenuity it must be supported upon feltsy during this squeezing operation. As the pressure exerted by succeeding pairs of rolls increases, a point is lreached where the wear and tear on the felts becomes prohibitive. This marks the limitof pressure, and the water content of the marketed pulp `is thus practically determined by the compression which the felts can successfully withstand.

v when the web is firstformed for it is then mostly all water and must be supported as it passes between the pressure rolls. But

by forming Patented Aug. 16, 1921.

this objection does not hold with the same force for the later rolls for -at this point the strength of the web has increased, and theoretically there seems no good reason why the web should not be passed between the bare rolls. lIt happens then, thatthe pulp is best able vto pass unsupported through the very rolls which exert the greatest pressure and. do most damage to the feltsa happy circumstance. Theoretically there seems no good reason why bare rolls should not be used for the final pressure; actually it happens that the rolls,

slippery from the water squeezed from the pulp cannot grip the oncoming web with a grip sufficient to pullf itthrough, and the crushing strength of the pulp itself is too puny to transmit any push from the felts which it has quit. Consequently ,the web slips and crushes, piling up in the nip of the rolls and passing through in disordered unconnected patches. This is especially true where the pulp passes through the finall rolls in the form of separate sheets,- each one of which must be individually gripped by the rolls.

Another problem confronting the manufacturer of pulpl is the one of dividing the web into, sheets of a size convenient for storage or transportation. It has heretofore been proposed -to construct machines for the manufacture of sheets-of paper and pulp,

the web with weakened transverse port1ons, and subsequently breaking the web into sheets along the weakened portions thus formed,by subjecting the web to a sulicient pull or tension, but in such machines there have been provided two sets of felts and rolls, one set for carrying the web while it is being formed and subjected to pressure, and the other for carrying the .web while it is being subjected to its breaking operationl According. to the present invention, the independent rolls for breaking the web into sheets and the second series or set of felts for carrying the web while it is being broken are eliminated; and thepresent invention provides an improved wet machine for forming the pulp into webs having weakened portions formed therein, and for removing from the web thus formed the greater portion of its moisture, so that the web is obtained in a relatively dry state, and, incident to such operations, for breaking the web into sheets along the weakened portions thereof.

In the improved wet machine of the present invention the pulp is formed into a sheet or web upon a screen cylinder operaty ing in much the usualgmannernbut provided with improved means, hereinafter more fully described, for forming weakened portions in the web lboth transversely and longitudinally. The 'Web thus formed is conveyed by a felt between wringer rolls and thence between two sets of press rolls, between each set of which the web is subject-` ed to a heavy pressure and converted into a relatively dry condition adapted directly for storage and transportation. The first set of press rolls has both the -felt and the web passing therethrough, so that the web is subjected to`compression, with accom.- panying removal of water therefrom, while in contact with` the felt. The second, set of press rolls', however, does not have the felt passingtherethrough, but this set acts di- I lrectly upon the web and effects a further ported, with rods` of relatively large cross- .verted into a series of sheets.

vBeyond the final press. rolls are situated a palr of diverging off-bearing belts which exert a sufficient transverse pull on `every sheet fed from the rolls to break them along the longitudinal weakened portions.

The present invention also includes improvements in the cylinder' mold or screen cylinder which rotates in the pulp vat and upon which the web is formed. This cylinder is wound with wire and covered with screen fabric in much the usual way, but it` 1s provided in itsperipheral framework, .upon which the wire and screens are supsection spaced apart a circumferential distance equal to the vlength of the sheets into which the web\ is to be broken. These rods are considerably larger thanthe relatively ,small rods forming the main circumferential framework of the cylinder and, by reasonrof the1r relatively large cross section, they cause the web'formed upon the cylinder to be weakened along the lines where.

`these rods occur, fortle reason that the pulp doesnot build up so rapidly upon the portions of the cylinder outside of these rods: The other details of construction of the lmproved screen cylinder will be more fully hereinafter set forth in c0nnection, with the ..mo're detailed description of the invention.

.the second set of press rolls'; and i The present invention further includes improvements in the construction of-the press rolls themselves; in the delivery mechanism for removing the separated sheets; in doctors; and in other features of construction; all as more fully hereinafter Setl forth and as claimed. 1

The invention will be further described in connection with the accompanying drawings which illustrate the preferred embodiments thereof and in which- Figures 1 and 2 together constitute an elevation with parts in section of a wet machine constructed in accordance with the present invention;

Fig.V 3 is a view'illustrating a modificationf; l

Fig'. 4 shows a modified construction of tFhat` partof the machine illustrated in Fig. 5 is an enlarged top view of part of, the delivery mechanism;

Fig. 6 is an enlarged View showing the construction of a preferred embodiment of `Figs. 7, 8l and 9 are fragmentary views showing the construction of the screen cylinder. j Referring to the drawings, 7 indicates the pulp vat within which the screen cylinder 8 4is mounted. The pulp within the vat is maintained atthe desired level, in a manner which will be readily understood without illustration, so that the screen cylinder will be immersed thereinto the desired extent. 100. v.The water passing intothe interior of the cylinder is withdrawn therefrom through one or both of the ends thereof in a manner well understood and therefore not herein illustrated and described. As the cylinder rotates a layerof pulp is' formed thereon, as

indicated at '10 inJFig. 1, the thickness of the layer being regulated bythe difference in level between the pulp and the water within the cylinder. Arranged above the cylinder is the couch roll 11, carried by a pivotally supported part ofthe frame and arranged to bear upon the screen cylinder. The layer of pulp formed upon the cylinder is brought into Contact with the felt 9 as the 115 cylinder rotates and is removed` .from the cylinder by the felt which carries it around ,the couch roll l1 and thence between the 'sets' of rolls referred to below.' f

l' The felt and -web after leaving .the couplr 120 roll l1 pass over the guide roll 12and thence between the three sets of rolls of which the bottom rolls are indicated at 14, 15 and 16 andthe top rolls at 29, 30, 31. A second felt passes around therolls 29, 30 and 31 125 and around the roller 32 which is adjustable by means of the rods 33, havinff operating handles 34. The web is accordingly in contact with both/the lower felt 9, and the upperfelt 28 while it is passing between 130 these three sets of rolls. These vrolls serve as wringer rolls and guide rolls and remove a portion of the water from the pulp web. From the roll 16 the felt 9 and web pass downwardly to the first set of press rolls 17, v

y 18, between which they are subjected to a heavy pressure, so that a large portion of the water is. squeezed out4 of the pulp web.

Beyond'the 'first set of press rolls the felt and web pass over the guide roll 194 and the felt then returns around the rolls 20, 21, 22,

23 and 24 to the screen cylinder and couch roll 11, while the web is separated from the felt and passes downwardly over the table or guide 41 to the second set of press rolls 42, 43. The guide roll 22 is vertically adjustable to permit of taking up slack in the endless felt 9 and of adjusting its tension. For this purpose the bearings for the roll 22 are mounted upon threaded rods 25 which may be turned from one side` of the machine by a hand wheel 26 on a shaft connected by bevel gears 27 to the threaded rods 25.

In the modification illustrated in Fig. 3

the upper felt 28 is extended beyond the roll 17 so that the web will be compressed between the two felts as it passes between the rolls 17 and 18.

Suitable provision is made for causing the desired pressure to be exerted between the rolls of the different sets, as, for example,

-roll 19, and slides down over the surface of the table 41 to the second set of press rolls 42, 43. This table is mounted in such a position that it serves to support the web and to guide it and it is als`o preferably inclined at Such an angle that the web will readily slide ydown over it.' The lower press roll 43 is mounted in bearings upon the side frames of the machine. The upper press roll 42 is mounted in bearings .formed in supports 44 pivotally mounted upon the side frames of the machine and forced down upon the lower roll by rods 46 connected to weighted ylevers 45 and havingy adjustable springs 46.

The rolls 42 and 43, in the embodiment of the invention illustrated in Fig. 6. are corrugated so that they will grip the web, and

the separatel sheets into .which the web is broken, and draw thempositively between them. This corrugation, in the embodiment illustrated, takes the form of threads or grooves cut helically in' the cylindrical sur- .faces of the rolls. In order to overcome any possible tendency of the helical grooves to shift the web to one side'of the machine, two sets of symmetrically disposed helical grooves should be employed. Thus, as illustrated, the grooves begin at the centers of the cylinders and extend toward each end. The depth of the groove, as well as its pitch, can be varied, and the width of the groove, as well as the width of the intermediate cylindrical portions of the roll'can likewise be Varied. vThese cylindrical portions are shown as'of slightly less diameter than the end portions 42a and 43a of the roll, so that, when the sheet or web of pulpis not passing between the rolls, they will bears upon each other only at their ends, but so that, when the pulp is passing between the rolls, they will be forced apart and will then bear only upon the pulp layer. between the grooved portionsof the roll is less than the thickness of the pulp web which passes between them so that when the pulp layer is between them, the'rolls will no longer bear upon each other at their ends but will exert the desired pressure upon the web to bring about the kfurther removal of water. and resulting drying. T he arrangement ot' the grooves so t-hat` they extend from the centers to the ends of the rolls has the tur ther advantage of assisting in causing the water squeezed from the web to travel to- That is, the distance ward the ends of the rolls so that itis more effectively removed.

It will accordingly be seen that there are provided two sets of press rolls which act successively upon the pulp web and coperate in theremoval of water therefrom, so that the pulp is obtained in a relatively dry state and with but a relatively small amount of water remaining therein. It will further be seen that the first setof pressrolls acts upon the web while it is still in contact with the felt on one or both sides, while the second set of press rolls acts upon `the pulp dii-eetl)v so thatit is subjected to pressure between the hard, smooth surfaces of the rolls instead of between felts.

The second set of press rolls 42. 43. 1s

rotated at a some-what greater peripheral speed than is the first set ot press rolls 17. 18. As a result, the pulp web is broken along the weakened portions thereotl and separated into sheets. so that it is the separated sheets of the web which pass between the second set of press rolls and which are there subjected to the further removal of water therebetween. These pulp sheets are still sufficiently wet so that the;r are slippery, but the corrugated surfaces of the press rolls 42 and 43 `nevertheless grip the sheets and draw them positively between the rolls without Vthe aid of felts.4

Power is applied to the machine in any suitable manner. such as .b v means of a pulley 49 mounted on shaft- 50. Upon this shaft is a pinionl 51 which meshes with a gear 52 on the shaft of the lower. press roll 18. This gear 52 also meshes with an intermediate gear 53 mounted on a shaft 54, and the pinion 53 also meshes with a gear 55 on the shaft of the lower press roll 43. It will thus be noted thatfthe lower press rolls 18 .and 43 are directly connected sov that they have'a constant relative rotation. The gear 55 is ,somewhat smaller than the gear 52, while the press rolls 18 and 43 are of substantially the same size. The peripheral speed of the roll 43 is accordingly somewhat the table.

greater than that ,of the roll 18. The portion of the web passin bet-Ween the press rolls 42 and 43 is accordlngly caused to move ati a speed in .excess Aof the speed of movement of the portion passing between the rolls 17 and 18. This difference in speed causes the web to be broken or severed along the weakened transverse lines. The distance between the two sets of rolls, and the arrangement of the table 41, are preferably such that the vbox such as the lbox indicated at 56.

The two sets of press rolls 17, 18 and 42, 43, may havethe rolls of each set geared together, preferably on the opposite ends of the rolls from those to which the main driving gears are connected.

The modified construction illustrated in vFig correspondsto that portion of the machine illustrated in Fig. 2;' That is, Figs.

1 and 4,'taken to ether, showvthe complete modified form org the machine. The construction illustrated in Fig. 4 is somewhat `simpler and I regard it as more advantageous. The frame shown in Fig. 4 is made as @a casting of sufficient trength, and it has a straight upper sur ace which can be machined and which serves as the support for the other parts of the machine. This construction of the frame avoids the stepped construction of Fig.' 2, and provides added strength.

Certain of the parts of Fig. 4, which are similar to those of Fig.` 2, are indicated bythe same reference characters with suffixes appended thereto. Thus there are provided, 1n the'construction` of Fig. 4, two sets of press rolls 'arranged and adapted to act upon the pulp successively. The -firstset of press rolls 17, 18, has the upper roll arranged with its center somewhat,l back of the center ofthe lower roll, this arrangel ment 'promoting the action' of the rolls in removing water from the pulp. Thejlower roll 18a is supported by suitable bearings carried by the lower frame. The upper roll 17a is supported in bearings 72 which are adjustably carried bythe lframe member 70, the end of this Jframe being secured to the lower frame member by the bar 71. Thus roll 17a is forced downward by the spring 73, the tension of which can be increased or decreased by the screw member 74 having an operating handle 75. This arrangement provides for the direct action of the spring upon the upper roll, which is nevertheless yeldably held against the lower roll. A cross beam or platform 76 enables the operator to gain' access to the central portion of the machine. This beam or platform is luitably supported by the end frame memers. v

The second set of press rolls 42a 43", is similarly arranged with the upperroll olfset, as shown, this arrangement materially promoting the desired dehydration of the pulp. The lower roll 43a 's supported by suitable bearings carried b the upper frame members. `The upper roll 42a is held in bearings carried by the pivoted member 77 which is pivotally. supported by the upright frame member 78. The opposite end of the member 77 is heldby the rod 79 and the compound levers 80, 81, 82. The rod 79 is adjustable by means of a nut screwthreaded upon its upper end and adapted to be operated by the wrench or operating handle 84, while the pressure applied to the roll can be increased or decreased by moving the weight 83 upon the lower lever 82. The rod 84 and hand wheel l85 enable the roll 42a to be raised, when thisl isdesired. In order to raise the roll, the weight 83 is removed or the pressure on the left-hand end of the member 77 is released, and the 'hand wheel 85 is then screwed downto the desired extent. f.

The felt which supports the pulp web passes between the first set of press rolls l17, 18a, and thence over the idlers 19a and l19", from which it returns around the idler .t

2()EL in a manner similar to that above described in connection with Fig. 2. After leaving thev lower carrying felt, the pulp web passes to the second set of press rolls 42a, 43a. If the felt does not approach near enough to these rolls, a table 41a can be interposed for assisting in guiding the web from the felt to the press rolls; This table 41a may be of varying width, or it may be omitted altogether where the arrangement of the felts lis such as to discharge the web directly between the press rolls.

The second set of press rolls, as previously described in connection with Fig. 2, is operated at a somewhat increased speed as compared with the first set of press discharge belts 88.

rolls, so that the pulp web is separated into sheets along the weakened transverse portions thereof. These separated" sheets are then passed between the second set of press rolls where they are further dehydrated, and the dehydrated sheets are then discharged from the machine.

The discharge mechanism shown in Fig. 4 is of an automatic character and is intended to discharge the separated sheets with a -minimum of manual labor into a suitable receptacle therefor. This discharge mechanism is made up of the two rolls 86 and 87, suitably supported,.and having the two felts 88 carried thereby. The-roll 86 is supported in suitable bearings in the uprlght frame member 78, While the roll 87 is adjustably supported by members 89 and 91. The distance between these members can be varied, andthe roll 87 can be raised or lowered by means of the adjustable member 89 which has a slotted portion in which the bolt 90 operates. The roll 86 is driven by a crossed belt or chain from a pulley or sprocket 53 and which acts upon a similarpulley or sprocket 86". The size of the pulley or sprocket 86 with respect to the pulley or sprocket 53b is such that the belts 88v are speeded up and run much faster than the pulp web passing through. the machine. These belts pick up the separated sheets and discharge them at an increased velocity into a suitable receptacle 92 therefor. Thigreceptacle Fmay be conveniently arranged below the belts 88 so that the discharged sheets will fall into it by gravity, or by the combined actionlof gravity and of the impetus given to the sheets by the rapidly moving From Fig. 5 it will be noted that the two y belts 88 are separated a somewhat greater distance at 4their outer ends than at their inner ends. This is due to the construction'of the rolls 86 and 87 with a slight taper toward or away from the center, as shown. This Yarrangement promotes the separation of the sheets from each otheralong the median line into which the p p web is cut by a water jet (shown at 102, Fig. 1, and to be described later) at the time of its formation. The two halves of theweb sheets are therefore separately discharged at the same time by the two belts 88.` f The two press rolls 12a and 43% are provided with doctors of improved construction. The lower doctor 97 is supported at its ends by projections 96 carried by the upright frame members 78, such projections through which passes bolt 100 for securing the doctor in place.l In order to strengthen the doctor longitudinally it has secured thereto an. angle iron member 98. l

The upper doctor 94 is similarly adjustable upon and carried by a supporting and guidemember or projection 93 being held in adjusted positionby means of bolt 101 and it likewise has a stifl'ening angle iron 95 secured to its upper surface. The two doctors are adjustable toward and away from the rolls and can be held in adjusted position. They are of simple construction but nevertheless effective for their intended purpose of preventing the sheets from following either of the press rolls and for guiding the sheets on to the delivery belts 88.

The preferred construction of the screen cylinder is illustrated in detail in Figs. 7, 8 and v9. As thus illustrated, the shaft 57 of the cylinder is provided with a plurality of spiders including two similar end spiders 58 and a number of intermediate spiders 59, all being secured to the shaft by means of setscrews or other suitable fastening means. The spiders are secured togetherA by aplurality of tie-rods 60.

Around the peripheri'es of the spiders 59 are a plurality of rods 61, preferably round, and laid ingrooves provided for their reception. as indicated in Figs. 8 and 9. The

end spiders 58 are slightly larger in diameshows one of these rods 62, as substantially square in cross-section. In Fig. 1, five such rods 62 are shown, these being spaced apart at equal distances around the cylinder. Upon the rods 61 and 62 there is wound a wire of suitable size, as illustrated in Fig. 7 and upon this wire are arranged the screen fabrics of appropriate mesh.

. In the operation of the screen cylinder the pulp in the vat 7 is taken up upon the surface of the cylinder ina relatively thin layer, which may be regulated in the manner above referred to. The layer of pulp overlying the relatively large rods 62, are thinner than the other portions of the web because the pulp fibers do not build up. so rapidly on these portions of the cylinders` surface. Accordingly, the continuous web formed upon the cylinder is weakened along transverse lines corresponding with the positions of the rods 62. It will be evident that the size of the sheets will be determined by the distance apart of these rods, and that the size of the'sheet. can be regulated by .varying the positions of these rods on the cylinder. It will also be evident that the outer surface of the screen cylinderv is continuous and free from obstruction and from any projections. That is, the weakened portions of the webV are formed by positioning the rods 62 withinthe effective screen fabric` instead of by arranging projections outside the screen fabric.

The web is weakened longitudinally by means` of a water jetwhich plays at '102 against the pulp as it is carried on felt 9v around roll 11. The water is supplied through a main pipe 103, which lies transversely o f the vat 7, and a branch pipe 104.

After the web has been formed upon the .screen/cylinder it is then passed between slight projections corresponding to the grooves upon the corrugated rollers. The pulp sheets will thus have a distinctive appearance.y l

Instead of forming a continuous web upon the screen cylinder and passing this web through the machine, separate sheets maybe formed which are substantially unconnected. It will be evident that the thickness of the web along the lines where it is weakened is dependent upon the effective` width of the bars 62. The width of these bars may be increased to such'an extent that the bers of the pulpwill not build up thereon to any appreciable extent, .in which case the web so 'which the sheet of pulp is passed, with will be formed of substantially se arate sheets rather than as a continuous we the length of the sheets being the circumferential distance between adjacent bars 62. ln

Fig. 8 bars 62A are shown of a width adapted for this purpose.

From the preceding description, taken together with the illustration, it will be seen that the present invention provides an improved machine of the character described having two successive sets of rolls between successive removal therefrom of increased amounts of waten It will also be seen that the pulp, but not the felt, is passed between the second set -of rolls which are adapted to subject it to a greater pressure than the felt could safely stand without injury.I While the second 'sety of rolls is illustrated as a grooved set of rolls, it will be understood that the rolls may be otherwise constructed Ito insure that the sheet or web of pulp will be positively drawn between the rolls and there-subjected to compressionand dehydration. It will also be seen that the sheet of pulp is suitably guided and conveyed from pleasing and the first set of rolls lto the second set, for ex! ample, by passing it over a horizontal or inclined table, which table, however, may be done away with if the web or layer is otherwise suitably guided and conveyed. So also, while the second set of rolls is shown as having the grooved portions thereof 'separated a distance less than the thickness of the sheet or web, this separation is not essential provided the rolls are so constructed as to insure the 4positive passage of the web therebetween, although the spacing apart of the grooved rolls is an advantageous construction.

I claim :l

l. A pulp machine comprising means for forming a pulp web, a felt for carrying the web, a set of press rolls between whichboth the web and felt pass, and a second set of press lrolls arranged beyond the first between which only the web passes, said sets of press rolls being constructed and arranged to subject the web to a heavy pressure to remove water therefrom.

2. A pulp machine comprising means for forS-ming a pulp web with transverse weakened portions therein at intervals, a felt for carrying the web, a set of press rolls between which both the web and felt pass, and a second set of press rolls arranged beyond the first and arranged to be rotated at a greater peripheral speed than the first, said sets of press rolls being constructedand arranged to subject the web to a heavy pressure to ren move water therefrom.

3. A pulp machine comprising means for 4 forming a pulp web with transverse weakened portions therein at intervals, a felt for carrying the web, a set of press rolls between which both the web and felt pass, and a second set of corrugated press rolls arranged beyond the first and between which only the web passes, said second set of press rolls being arranged to be rotated at a greater peripheral speed than the first, and both sets E of press'rolls being constructed and arranged to subject the web to a heavy pressure to remove water therefrom. A

4. A pulp machine comprising means\for forming a pulp web with transverse weak- 'cylinder for forming a pulp web and means for subjecting the web so formed to pressure to remove water therefrom, saidscreen cylinder having a screen periphery and having relatively large bars within and adjacent to the screen periphery and spaced apart to -sheets along the weakened transverse porform weakened transverse portions in the tions, and delivery means for the sheets esweb. caping from the second set 'of press rolls, said 6. A pulp machine comprising means for delivery means being arranged to receive the forming a pulp web and means for subjectseparate sheets of pulp and traveling at a ing the web so formed to pressure to remove suiiiciently rapid rate to discharge the sheets water therefrom, said means including a set into a receptacle therefor.

of corrugated press rolls having symmetri- 12. A pulp machine' comprising means for cally disposed sets of helical grooves conforming a pulp web with transverse weakstructed /andadapted to engage the pulp ened portions therein at intervals, two sets of positively and draw it therebetween and to press rolls between which the web is suci subject it to a heavy pressure rto remove cessively passed and subjected to a heavy water therefrom.

. pressure to lremove water therefrom, the

7 A pulp machine having a set of press second set of ress rolls being rotated at a rolls which normally bear upon each other .greater perip eral speed than the first only at their ends' and have their central porwhereby the web is broken into usheets along tions spaced aparta distance less than the the weakened transverse portions, and delivthickness of the pulp web to be subjected ery means arranged to receive the sheets to pressure therebetween,` whereby the cenfrom the second set of rolls and*A to discharge tral 4portionsof the roll bear upon the pulp them into a receptacle therefor, said delivery vweb While it is passing therebetween, but the mea-ns comprising one or more traveling belts rolls bear upon each other at their ends when w adapted to travel at a materially increased no pulp web or sheet is passing therebetween. speed as compared with the peripheral speed 8. A pulp machine having al set of press of the rolls, and being adjustable to disrolls having symmetrically disposed sets of charge the sheets intoareceptacle at differhelical grooves therein and forming corrugalA ent levels. tions for assisting the passage of the pulp f 13. A pulp machine comprising means web or sheet therebetween. for forming a pulp web with transverse 9. A pulp machine comprising means for weakened portions therein at intervals and forming a pulp web, a set of press rolls befor cutting or dividing said web longitutween which the web is passed and subjected dinally into two parts, two sets of press to a heavy. pressure, a second set of press rolls between whichthe two halves of the rolls arranged beyond the first for subjecting web are passed successively and subjected' the web to aheavy pressure, and a stationary to a heavy pressure, the second set o f press table arranged between said sets of rolls `for rolls being rotated at a greater peripheral supporting the web in its passage from the speed than the first, whereby the two halves first set to the second set. .of the web are broken into sheets along 10. A pulp machine comprising means forfthe weakened transverse portions, and deforming a pulp`web,a felt for carrying the livery means for delivering the separate web, a set of press rolls between which both .sheets -thus formed, said delivery means 1nthe web and vfelt pass and between which cluding two belts each ada ted to receive the web is subjected to a heavy pressure, a and separately discharge t e sheets from second set of press rolls arranged beyond the each half of the pulp web. first and arranged tobe rotated at a greater 14. A pulp machine comprising means for peripheral speed than the first and to sub- OI'minga Web Wlth a 10I1gltlld1na1 Welkelled ject the web to a heavy pressure, and a table portion therein, press rolls betweenwhich the interposed between the two sets' of rolls for web is passed and delivery means which eX- supporting the web and sheets v separated erta transverse pull upon the'web and septherefroni during their passage from the first arate. it along the longitudinal weakened set of rolls to the seco'nd. portion.

11. A pulp machine comprising means for 15. A pulp machine comprising means for forming a pulp webL with transverse weakforming ay web with a longitudinal weakened ened portions therein at intervals, a set of portion therein, press rolls between `which press rolls between which the web is passed the web is passed and delivery means which and subjected to a heavy pressure, a second exert a transverse pull u pon the web and set of press rolls arranged beyond the first separate it along the longitudinal weakened for subjecting the web to a heavypressure, -,portion, said delrvery means comprising said second set of press rolls being adapted two diverging belts.

to be rotated ata greater peripheral speed In testimony whereof l afiix my si nature. than the first, whereby the web is broken into HARRY E. TIDM SH.

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