US1225778A - Wet machine. - Google Patents

Description

H. G. CRAM dz C. A. PARSONS.

WET MACHINE.

APPLICATION FILED JULY 19. IQIG.

Patented May15, 1917.

4 SHEETS-SHEET I Zia 96.65: A! 6.29%,

H. G. CRAM & C. A. PARSONS.

' WET MACHINE.

1,225,778 APPLICATION FILED JULY 19,1916. Patented May15,

4 SHEETSSHEET 2.

ms uunms Psrsns co. numurnm. wAsnmamu. u. a:

H. a. CRAM & c. A. PARSONS.

' WET MACHINE.

WZmeaa.

APPLICATION HLED JULY 19, I916.

Patented May 15, 1917.

4 SHEETS-SHEET a.

m: mmms Psrsks m. Pnamurua. vusmnc umv n. c

H. G. CRAM & C. A. PARSONS.

WET MACHINE.

APPLICATION FILED JULY 19. I916.

Patented May15,1917.

4 SHEETS-SHEET 4.

HERVEY Gr. CRATE AND CLIFFUED 0}? IMIILLTLNGCKET, DEAINE, ASSIGNORS T0 GREAT NGRT M..RN FAFER, Gt EPANY, OF MILLIN'QC'KECT, lwffsINE, A CORPOBATIQN OF MAINE.

VJ'ET ll'iilGK-IINE.

Lgg g q yg Specification of Letters Patent. Pat gntgfi Blay 15, 191? Application filed July 19, 1916. Serial No. 116,224. o at], ii /10212.51: may concern: Our invention has for another object the it known that vie l snvnr G. GRAN association of means with the press-roll or and CLIFFORD A. Pausoizs, citizens of the the structural formation thereof, whereby fnited Eltates, residing at Millinocket, in there is provided a narrow unpressed porthe county of Penobscot, in the State of tion in the layer of pulp on said roll, which lvlaine have invented an Improvement in constitutes a line of Weakness, Which line Wet li rhichines of which the following is extends longitudinally of the roll, at or a specification. near the place Where the air blast is di- This invention relates to Wet machines, rected, so that the air blast Will rupture and has reference particularly to means for the layer of pulp at such line of Weakness; 65 dividing the layer of pulp on the pulpand furthermore, if desired an end-portion receiving roll preparatory to shinning or of the ruptured layer may be deflected stripping it from the roll, and to starting away from the roll to start the sl rinninfe, the skinning or stripping operation. or stripping operation.

in the Wet machines with which the prev Figure l is a side elevation of a portion ent invention is uirticularly concerned. the of a wet machine having associated with pulp is accumulated upon one, usually the its press-rolls a rupturing and skinning upper of a pair of press rolls, to the demechanism for the layer of pulp thereon, sired thickness, being continuously subembodying this invention. 7 jected to pressure to eliminate more or less 2 is a front e evation of the same. of the Water to secure necessary adherance Fig. 3 is a front elevation of the upper of the mass. having reached a predeterpress roll which it adapted to receive upon mined thickness, it is desired to remove the it the layer of pulp and with which the pulp layer from the roll, and as such layer rupturing and skinning mechanism is asso- 0 is in cylindrical form about the roll it IS ciated.

required to divide the layer in a direction la longitudinal section of one lenf'hivise the roll, and then strip it from end-portion of the upper press roll taken tl e roll. Various mechanical devices have on the dotted line -ll, Fig. 3.

been proposed for severing, the layer of pulp, and 6 are transverse sectional v though the usual practice is to cut it by a frag'n per press rolh taken,

l o the 1 suitable tool controlled by the Workman, the. respectively, on the dotted line and operation of which depends upon the dexo6. 4:.

terity of the Worlnnan to secure a proper rings. 7 anc. S sectional details illusdivision. Furthermore after severance by tra ing particularly the controlling-valve such methods, it is a matter of some little for the air blast. 99 diliiculty to separate the pulp from the sur- 9. 10 1.1. and 12 are enlarged detail face o'lf'the roll, and more particularly to vievvs of the actuating-me. V, for the constart it for such separation. trolling-valve.

One of the objects of the present inven- The pulp rupturing and skinning mech- V tion is the provision of pneumatic means, anism is here shown as applied to or arsuch as an air blast forcibly delivered in ranged to ope in conjunction with the the form ot' numerous closely associated jet ui sper or pulp-rewiring roll of the Wet ma- :u nged longitudinally of the roll for chine. This machine comprises essentially mtomatically dividing; the pulp layer on a had or supporting frame 7 from Which P the press rollr s.ihstantiall longitudinally rise bearings 2, for the lower press roll 3, m6! of the roll. said air blast being directed the land 1 having rortically projecting against the inside of said layer to tear or frame-liars 4;, on which the bearings for rupture it on the line of the blast and when the upper press roll ii. are adapted to slide so directed the aver of pulp adjacent the ertically. The hearings of the respective line of divisiom will be forced away from rolls are arranged in vertical. alinement, 105 the surface of the roll, to start the separaand the bearings for the upper press roll tion of the layer therefrom, so that the are arranged to receive a continuous do\vn layer may be readily andconveniently de- \vard pressure from suitable springs not ta ched or removed from the roll and de shown. mounted in housings 7 in the frame 11 \J livered upon a table in sheet form. bars a the tension of Which springs may be adjusted by means, not necessary to describe in detail, but operated by hand wheels 8.

The upper press-roll 6, with which the present invention is here shown as associated, comprises a cylindrical pulp-receiving portion and end-journals. Said pressroll 6, or at least its middle portion which receives upon it the layer of pulp, is made hollow to provide within it a chamber 12, to receive and contain a fluid such as compressed air, which chamber may and preferably will be substantially coextensive with the length of the pulp-receiving portion of the roll, and one of the end journals is made hollow and in open communication with said chamber, by which to conduct compressed air to said chamber.

The pulp-receiving portion of the roll has a recess formed in its outer cylindrical surface, which extends throughout its length, or thereabout, said recess comprising a narrow portion 13, arranged at the bot tom of a wider portion 14. The narrow portion 13 is in open communication withthe chamber 12, by numerous radially di posed conducting passages 11, so that the compressed air contained in the .chamber 12 may pass freely into said narrow recess 13.

A long bar 15, adapted to fit the recess 14, is arranged therein, and rigidly secured in place by bolts 16. The outer face of the bar is curved in continuation of the cylindrical surface of the press roll. Said bar has on its inner side a deep slot or recess 17, extending throughout the length of the recess let, and the front face of said bar, at the bottom of the slot, is perforated, as at 22, there being here shown two rows of perforations, which rows extend throughout the length of the bar or thereabout. slot 17 is disposed opposite the recess 13, and is adapted to receive the distributing and controlling-means by which to control the distribution and passage of the compressed air from the recess 13, (which is in open communication with the chamber 12), outward, through the perforations 22. As shown, an air distributing bar 18 is arranged at the bottom of the slot 17, being rigidly secured therein, and said bar is made of a width and length corresponding, respectively, to the width and length of the slot, and its side adjacent the bottom of the slot is cut away or recessed to form a series of elongated chambers 20, which extend over the row or rows of perforations 22, each chamber inclosing several such perforations. Said distributing bar 18 also has conducting passages 19, extended through it, which lead to each chamber, there being at least one such conducting passage for each chamber. These passages 19 are adapted to be valve-controlled, preferably simultaneously, and to accomplish The this result, a valve element 24 is arranged in the slot 17, in slidablc engagement with the bar 18, it comprising a body-piece or bar and several transversely disposed valveplates arranged on the body-piece and separated from each other to correspond with the relative locations of the conducting passages 19. There will be as many of these valve-plates as there are conducting passages 19 in the distributing bar. Said valvebar is adapted for sliding movement longitudinally in the slot 17, and its valve-plates are adapted for movement with it, to cover and uncover the conducting passages 19. Between the several valve-plates spaces are provided and said spaces are in open communication with the recess 13, and the bodypiece of the valve-bar is made narrower than the width of the slot 17, to afford such open communication. Said valve-bar is held pressed into engagement with the air distributing bar by springs 23, arranged in the recess 13, and attached at one end to the bottom of the recess. This valve-element acts as a slide valve, but so far as my invention is concerned, it may be constructed in any suitable manner.

From the above, it is obvious that with the slide valve operated at predetermined moments, air under pressure may be repeatedly conducted from the chamber 12 of the press-roll and caused or permitted to issue as a series of jets through the perforations 22, against the under side of the layer of pulp on the press roll.

On the outer face of the bar 15, above the openings 22, is arranged a long channel or groove 21, extended substantially from end to end of the bar and in parallel relation with the row or rows of perforations 22, said channel being quite narrow, and the layer of pulp, which is formed on the press roll, is extended over said channel, butat or along such portion is not compressed by engagement with the under press-roll, so that over said channel the layer of pulp is quite soft compared with the remaining portion thereof, and thus forms a line of weakness. This weakened line or narrow impressed portion of the layer is purposely ar'anged adjacent the perforations 22, so that the issuance of air jets from said perforations and against the under side of the layer of pulp will act to force the layer outward, and tear or rupture it along the line of weakness, and furthermore, one end portion of the ruptured layer will be de flected in a direction away from the surface of the roll.

Thus it will be observed that when the sliding valve is operated to admit of the air issuing from the perforations, the layer of pulp will be immediately ruptured and one end-portion of the ruptured layer will be forced or blown away from the surface of the roll, admitting of its being; easily stripped from the roll. This stripping will ordina ily proceed automatically. T he blast will not only i' upture layer, but blow it outwardly and a; he point where gravity will be 7 1 effective. The gravity pull of the deflects" portion of the pulp and centrifugal force v. ill ordinarily be sufhcient to strip the layer of pulp from the roller. Of course, if the stripping by gravity and momentum does not proceed automatically, it

'may readily be accomplished by hand or other well-known means, but it can be made to operate automatically without difliculty, it reasonable care is used.

To deliver the air under pressure from a suitable source to the chamber 12 of the press-roll, there is secured to one of its jour nals, a fixed clamping support 29, which receives and holds an end-section of a feedpipe 30, connected by a pipe with any suitable source of supply. The delivery terminal of the feed pipe is rotatably mounted in what may be termed a slip-joint connection 31, which is carried by the journal of the upper press roll, so that said press roll is free to rotate and also to rise and fall in operation under the accumulated pulp without disturbing the proper non-leaking junction between the air pipe and press-roll.

As heretofore stated, our device is automatic, and means are therefore herein provided by which the accumulation of the pulp to the desired thickness on the press oll and consequent rise of said press roll, will automatically operate the slide-valve 24:, to direct the air under pressure to the surface of the roll for the purpose stated. This automatic means, in the preferred embodiment, as here shown, will now be described.

A cylinder is secured to one end of the press-roll at one side of the center and in line with the slide-valve 2%, see Figs. t and 7, said cylinder has a piston-chamber which contains a piston 38, which is operatively connected with the slide valve 2 by a stem 39, extended through a stalling-box 4:0, and movement of the piston in the cylinder acts to correspondingly move the slide-valve. Compressed air from the chamber 12 of the hollow press-roll is adapted to be delivered to said cylinder by which to control the movement of the piston; and the delivery of air to the c indcr is controlled by a valve adapted for operation by means controlled by the rising pressroll.

[is here shown, a pipe connection 33 leads from the cha .ber 12/.v to the outer end-portion of the cylinder 32, and in said end-portion there are arranged suitable ports which are controlled by the controlling-valve 4-1. 26 represents a port connected with the pipeconnection which. may be angularly formed and leads to the valve-chamber of the controlling-valve s1. 37 represents a port leading; from the valve-chamber to one end of the piston-chamber of the cylinder 56 represents a port leading from the valve-chamber to the other end of the piston-chamber of the cylinder 82. l6 represents a port leading rem the valve-chamber to the atmosphere, which serves as the exhaust-port.

controlling valve l1 is made as a 1'0- tary our whici is arranged in the valvechamber against a flat seat which forms the bottom wall of the chamber, and all of said ports terminate at said seat so that said dislivalve may control all of said ports. The contact-face of said disk-valve has curved channels, see dotted lines Fig. 8, for intercommnnication between the several ports in such manner that when the valve is in one position an open way is established between the chamber 12 and port 37, leading to one end of the cylinder, and when in such position the port 36 leading to the other end of the cylinder is in open communication with the exhaust-port -16; and when in another position an open way is established between the chamber 12 and the port 36 leading to the other end of the cylinder, and when in such position open communication is established between the port 37 and the exhaustport 4E6. Such construction admits of the employment of a disk-valve adapted for complete and continuous rotation and for the longitudinal reciprocation of the piston and consequent corresponding movement of the sliding-valve 24.

It is, therefore, apparent that by proper control of the valve 41, the air may be admitted to the cylinder with a view to positioning the sliding-valve so as to permit the compressed air to pass through the perforations of the roll, or with a view to so oper ating said sliding-valve as to cut off said air supply.

The automatic operation of the control ling valve 11 is directly controlled by the upper press-roll, the direct actuation of said valve being governed by an operating-wheel 51, connected to the stem :8 of said valve, said wheel having two pairs of diametrically opposed radial arms, one pair of which, 52. are made narrower than the other pair the narrow arms being; utilized to operate the wheel, and move the dish-valve rotarily, for admitting air to the cylinder to o crate the sliding-valve and control the delivery of air to the surface of the cylinder, and the wider arms being utilized to operate the wheel to move the dislevalve rotarily to shut off the air. Said wheel is adapted for intermittent operation in the same direction of rotation. and being arranged on the pressroll as shown is adapted to revolve about the axis of said roll.

For operating the operatingwheel 51,

there is secured to the movable bearing of or hearing 56.

the upper press-roll a support 54, see Fig. l, the lower end of which is laterally deflected, at 55, and terminates in an elongated guide A rod 57 is movably mount ed in saidguide to slide longitudinally, and is disposed at right angles to the plane of the operating wheel 51. That end of the slide rod 57 next said wheel has a pin 58, which, as the rod is moved in one direction, as for instance to the left, see Fig. 12, enters the orbital path of the arms of the op crating-wheel, to be engaged by one of the arms thereof, and thereby cause a quarter turn of said wheel, and as the rod is moved in the other direction, as for instance to the right, see Fig. 10, is removed from the on bital path of the operatingwheel, so that said wheel will pass by it freely.

Secured to a fixed part of the frame, as for example, the support for a shelf which may be arranged to receive the layer of pulp from the roll, is a trunnion 59, on which is rotatably mounted a sleeve or hub 60, hav ing a radial arm G1, which extends through a slot in the guide-bearing 56, and through a slot 62 in the slide-rod 57, the slots permitting necessary movement of the arm to reciprocate the slide-rod without interference, and to hold the arm against other than swinging movements with relation to the v slide-rod. The sleeve also ha a lateral extension 63, the terminal of which is connected to the guide 56 by an adjustable connecting rod 64:, loosely connected at its remote ends, respectively, to the guide or bear ing 56, and to the extension 63. Said rod may be composed of two parts adjustably connected by a coupling 65. As the movable bearing for the press-roll rises and falls, the support 54: is correspondingly moved and through the connecting rod the sleeve 60 is rocked and the arm 61 moved to move the slide-rod 57 toward the operating wheel 51, and the pin 58 thereon into the path of the arms thereof. Said wheel is adjusted on the valve-stem in such position that one of the narrow arms thereof engages the pin 58 of the slide-rod, when the slide-rod has been moved sufficiently by the arm 61, that is, when the layer of pulp has accumulated on the roll to a predetermined thickness. This engagement, on continued rotation of the press-roll turns the operating wheel 51 approximately 90 degrees, and correspondingly turns the dislovalve and controls the piston, as previously described to cause deli very of the air blast. Further rotation of the pressroll carries the operating wheel 51 past the pin 58 and to a position to cause the adjacent wide arm 53 thereof to engage a lug 66,

fixed to the support 54-, by which said wheel is rotated in the same direction approximately another 90 degrees, thereby to reverse the position of the disk-valve passages, and shut off the air blast. This resets the operating-\vlieel for further operation by he slide-rod. Rotation of lthe press-roll therefore may be continuous. The lug 66 is so arranged that it is beyond the path of the narrow arms. The projection 58 on the slide-rod is obviously controlled by the rise of the press-roll, that is, the thickness of the layer of pulp thereon, through the connection 64, and as this connection is adjustable, the slide-rod may be arranged for movement to a wheelengaging position, at any desired rise of the press-roll, that is, at any predetermined thickness of the layer of pulp on such roll.

l Ve have referred to the use of compressed air for dividing the layer, but obviously other fluids may be used with equivalent results.

We claim 1. A wet machine comprising a pair of cooperating press-rolls arranged to compress a layer of pulp on the pulpreceiving roll during the formation thereon, and having means associated therewith for forming a line of weakness longitudinally thereof, and pneumatic-means arranged to rupture said layer at said line of weakness.

2. A Wet machine comprising a pair of co operating press-rolls arranged to compress a layer of pulp on the pulp-receiving roll and to leave a narrow unpressed weakened line longitudinally thereof and pneumatic-means arranged to rupture the layer of pulp at said weakened line.

3. A wet machine comprising a pair of cooperating press-rolls arranged to compress a layer of pulp on the pulp-receiving roll and to leave a narrow unpressed weakened line longitudinally thereof and pneumatic-means arranged to rupture the layer of pulp at said weakened line, and to deflect the end-portion of the ruptured layer away from the roll.

4. A wet machine comprising a pair of cooperating press-rolls arranged to compress a layer of pulp on the pulp-receiving roll and to leave a narrow unpressed weakened line longitudinally thereof, and pneumatic-means arranged to deliver a current of air against the inner side of the layer of pulp on said roll at the unpressed weakened portion thereof to rupture the pulp layer entirely across the same.

5. A wet machine comprising a pair of cooperating press-rolls arranged to compress a layer of pulp on the pulp-receiving roll and to leave a narrow unpressed weakened line longitudinally thereof, and pneumaticmeans arranged to deliver a current of air against the inner side of the layer of pulp on said roll adjacent the unpressed weakened portion thereof to rupture the samegand to deflect the end-portion of the ruptured layer away from the roll. 7

6. A wet machine comprising press-rolls, on one of which the pulp is accumulated in the operation of the machine, one of said rolls being formed to provide a narrow unpressed portion in the layer of pulp, during the operation of the rolls, and pneumaticmeans arranged to rupture the layer of pulp at said unpressed portion.

7 A wet machine comprising press-rolls, on one of which the pulp is accumulated in the operation of the machine, one of said rolls being formed to provide a narrow unpressed portion in the layer of pulp, during the operation of the rolls, and pneumaticmeans arranged to rupture the layer of pulp at said impressed portion, and to deflect the end-portion of said layer in direction away from the roll.

8. A wet machine comprising press-rolls, the pulp-receiving roll having a slot to provide an impressed weakened line in the layer of pulp during its formation on the roll and pneumatic-means arranged to rupture said layer at its weakened line.

9. A wet machine comprising press-rolls, the pulp-receiving roll having a slot to pro: vide an impressed weakened line in the layer of pulp during its formation on the roll and pneumatic-means arranged to rupture said layer at its weakened line, and to deflect the end -portion of the ruptured layer away from the roll.

10. A wet machine comprising press-rolls, on one of which the pulp is accumulated in the operation of the machine, one of said rolls being formed to provide a narrow unpressed portion in the layer of pulp during the operation of the rolls, and pneumaticmeans arranged to deliver a current of air against the inner side of the layer of pulp on said roll adjacent the weakened portion thereof to rupture the same at the weakened portion.

11. A wet machine comprising press-rolls, on one of which the pulp is accumulated in the operation of the machine, one of said rolls being formed to provide a narrow unpressed portion in the layer of pulp during the operation of the rolls, and pneumaticmeans arranged to deliver a current of air against the inner side of the layer of pulp on said roll adjacent the weakened portion thereof to rupture the same at the weakened portion, and to deflect the end-portion of the layer away from the roll to start the skinning operation.

12. In a wet machine, a pulp-receiving roll upon which a layer of pulp is formed, said roll having a longitudinal recess, a bar arranged in the recess, having perforations extended to the outer surface of the roll, and having an exterior channel arranged adjacent said perforations and in parallel relation therewith.

13. In a wet machine, a hollow pulp-rcceiving roll adapted to contain compressed air, and means arranged to deliver the compressed air from, the interior of said roll through perforations arranged at the exterior surface thereof, against the inner side of the layer of pulp on the roll, and means associated with said roll for forming a line of weakness in the layer of pulp adjacent the perforations, whereby the air forcibly issuing from the perforations will act to rupture the layer entirely across the same at the line of weakness, and to deflect a ruptured end-portion away from the roll.

14. A wet machine comprising a pair of cooperating press-rolls arranged to compress a layer of pulp on the pulp-receiving roll and to leave a narrow unpressed weakened line longitudinally thereof and pneumaticmeans arranged to rupture the layer of pulp at said weakened line, including a valve adapted to control said means.

15. A wet machine comprising press-rolls, on one of which the pulp is accumulated in the operation of the machine, one of said rolls being formed to provide a narrow unpressed portion in the layer of pulp during the operation of the rolls, and pneumaticmeans arranged to deliver a current of air against the inner side of the layer of pulp, throughout its width, and adjacent the weakened portion thereof, to rupture the same at the weakened portion, said pneumatic-means including a controlling-valve.

16. A wet machine comprising press-rolls, on one of which the pulp is accumulated in the operation of the machine, one of said rolls being formed to provide a narrow unpressed portion in the layer of pulp during the operation of the rolls, and pneumaticmeans arranged to deliver a current of air against the inner side of the layer of pulp, throughout its width, and adjacent the weakened portion thereof to rupture the same at the weakened portion, including a valve arranged in the roll and slidable longitudinally to control the delivery of air.

17. In a wet machine, a hollow pulp-receiving roll adapted to contain compressed air, and means arranged to deliver the compressed air from the interior of said roll through perforations arranged at the exterior surface thereof, against the inner side of the layer of pulp on the roll, and means associated with said roll for forming a line of weakness in the layer of pulp adjacent the perforations, whereby the air, forcibly issuing from the perforations, will act to rupture the layer at the-line of weakness, and deflect a ruptured end-portion away from the roll, and a valve coextensive with the perforations for controlling the passage of air therethrough.

18. In a wet machine, a pulp-receiving roll upon which a layer of pulp is formed, said roll having a longitudinal recess, a bar arranged in the recess having perforations extended to the exterior surface thereof, an

air-distributing member extended over the inner side of said perforated bar, having air chambers inclosing groups of perforations and having air passages leading to the several chambers, and a slidable valve member arranged on said distributing-member for controlling the delivery of air through said air passages, and means for reciprocating said valve-member.

19. In a wet machine, a pulpreceiving roll upon which a layer of pulp is formed, said roll having a longitudinal recess, a recessed bar arranged in the recess of the roll having perforationsextended from the recess in the bar to the exterior surface thereof, an air-distributing member arranged in the recess in the bar over said perforations, having air chambers inclosing said perforations and having air passages leading to said chambers, a sliding valve member arranged on said distributing member and controlling said air passages, and means for operating said valve-member.

20. A wet machine comprising a pair of cooperating press-rolls arranged to compress a layer of pulp on the pulp-receiving roll of the pair and to form a narrow weakened portion longitudinally of the roll, and pneumatic-means arranged to rupture the layer of pulp at said weakened line, including a controlling valve for said means adapted'for automatic operation.

21. A wet machine comprising a pair of cooperating press-rolls arranged to compress a layer of pulp on the pulp-receiving roll of the pair and to leave a narrow unpressed portion longitudinally thereof, and pneumatic-means arranged to direct a blast of air against the inner side of said layer adjacent said unpressed portion to rupture the layer of pulp along said impressed portion, said pneumatic-means including a controlling-valve for the delivery of the air blast adapted for automatic operation.

22. A wet machine comprising a pair of cooperating press-rolls arranged to compress a layer of pulp on the pulp-receiving roll of the pair and to form a weakened portion longitudinally of the roll, and pneumatic-means arranged to rupture the layer of pulp along said weakened portion including a controllingvalve, and means operated by the rise of the press-roll to govern the operation of said controlling-valve.

23. A wet machine comprising a pair of cooperating press-rolls arranged to compress a layer of pulp on the pulp-receiving roll of the pair and to form a weakened portion longitudinally of the roll, and pneumaticieans arranged to rupture the layer of pulp along said weakened portion includ ing piston-actuated controlling-valve, and means to control the movement of the piston, adapted for operation by the rise of the press-roll.

24. A wet machine comprising a pair of cooperating press-rolls arranged to compress a layer of pulp on the pulp-receiving roll of the pair and to form a weakened portion longitudinally of the roll, and pneumatic means arranged to rupture the layer of pulp along said weakened portion including a piston-actuated controlling-valve a pipe connection between thecylinder containing the piston and the chamber of the press-roll, a valve governing the passage of air through said pipe-connection adapted for operation by the rise of the press-roll.

25. A wet machine comprising a pair of cooperating press-rolls arranged to com press a layer of pulp on the pulp-receiving roll of the pair and to form a weakened portion longitudinally of theroll, and pneumatic-means arranged to rupture the layer of paper along said weakened portion, and means to control said pneumatic-means having an operating-member, actuating-means for said operating-member, and means controlled by the rise of the press-roll for moving the actuating-means into and out of c0- action with the operating-member.

26. A wet machine comprising a pair of cooperating press-rolls arranged to compress a layer of pulp on the pulp-receiving roll of the pair and to form a weakened portion longitudinally of the roll, and pneumatic-means arranged on the press-roll for rupturing the layer of pulp along said weakened portion, controlling-means arranged on the press-roll for said pneumatic means,

having an operating-member, and actuat ing-means for the controlling-means arranged for movement upon the rise ofthe press-roll, into and out of coactive position.

27. A wet machine comprising a pair of cooperative press-rolls arranged to COII1' press a layer of pulp on the pulp-receiving roll of the pair, pneumatic-means arran ed to rupture said layer of pulp entirely across the same, and controlling-means for said pneumatic-means adapted for operation upon a rising movement of the press-roll and during rotation thereof.

28. A wet machine comprising a pair of cooperative press-rolls arranged to compress a layer of pulp on the pulp-receiving roll of the pair, pneumatic-means arranged to rupture said layer of pulp entirely across the same, having a controlling-element arranged on the press-roll, and an actuator therefor having an operating-element arranged on the press-roll, and means to actuate said operatingelement which is separately supported but adapted for coaction with the operating-element upon a rising movement of the press-roll and during its rotation.

29. A wetmachine comprising a pair of cooperative press-rolls arranged to compress a layer of pulp on the pulp-receiving roll of the pair, pneumatic-means arranged to rupture said layer of pulp entirely across the same, having a controlling-element arranged on the press-roll, an actuator therefor having an operating-element arranged on the press-roll, and means to actuate said operating-element which is separately supported but adapted for successive coaction with the operating-element upon a rising movement of the press-roll and during its rotation, to open and close the pneumaticneans.

30. A wet machine comprising a pair of cooperative press-rolls arranged to compress a layer of pulp on the pulp-receiving roll of the pair, pneumatic-means arranged to ruptin-e said layer entirely across the same, a p1lip-controlling means for said pneumaticmeans, including a rotatable operating-member arranged on the press-roll and adapted to move in an orbital path, and means moved by the rising press-roll into the orbital path of said operating-member to cause rotation of said member as the pressroll rotates to open the pneumatic-means.

31. A wet machine comprising a pair of cooperative press-rolls arranged to compress a layer of pulp on the pulp-receiving roll of the pair, pneumatic-means arranged to rupture said layer entirely across the same, a

'illlU-COIIUOlllIlQ' means for said neumaticl i v means, including a rotatable operating-member arranged on the press-roll and adapted to move in an orbital path, and means moved by the rising press-roll into the orbital path of said operating-member to cause rotation of said member as the press-roll rotates to open the pneumatic-means, and means also arranged in the orbital path of the operating-member bevond the aforesaid means and adapter to be engaged by the operatingmember as the press-roll rotates to close the pneumatic-means.

A wet machine, comprising a pulp lQQQlv'lIlQ, roll and a cooperating press-roll to press a layer of pulp on the pulp-receiving roll during the operation thereof, an opening or openings on the surface of the pulp-receiving roll, extending across the same, means to forcibly project air outwardly through said opening or openings a inst the inside of the layer of pulp, with smhcient power to rupture the layer of pulp entirely across the same.

wet machine comprising a pulp re- 1 "ing roll and a cooperating press-roll to press a layer of pulp on the pulp-receiving roil during the operation thereof, an openm, or openings on the surface of the pulpreeiving roll, extending across the same,

to forcibly project air outwardly ro gh said opening or openings against cient power to rupture the layer of pulp entirely across the same, and to deflect the inside of the layer ofv pulp, with sufflv endportion of the ruptured layer away from the roll.

34:. A wet machine comprising a pulp receiving roll and a cooperating press-roll to press a layer of pulp on the pulp-receiving roll during the operation thereof, an opening or openings on the surface of the pulpreceiving roll, extending across the same, means to forcibly project air outwardly through said opening or penings against the inside of the layer of pulp, with sufficient power to rupture the layer of pulp entirely across the same, and a valve to control said means.

35. A wet machine comprising a pulp receiving roll and a cooperating press-roll to press a layer of pulp on the pulp-receiving roll during the operation thereof, an opening or openings on the surface of the pulpreceiving roll, extending across the same, means to forcibly project air outwardly through said opening or openings against the inside of the layer of pulp, with sufiicient power to rupture the layer of pulp entirely across the same, and a controllingvalve for said pneumatic means adapted for automatic operation.

36. A wet machine comprising a pulp receiving roll and a cooperating press-roll to press a layer of pulp on the pulp-receiving roll during the operation thereof, an opening or openings on the surface of the pulpreceiving roll, extending across the same, means to forcibly project air outwardly through said opening or openings against the inside of the layer of pulp, with suflicient power to rupture the layer of pulp entirely across the same, including a controlling-valve for said pneumatic means adapted for operation by the rise of the press-roll.

37. In a wet machine, a pulp receiving roll and a cooperating press-roll arranged to compress a layer of pulp on the pulp-receiving roll during the operation thereof, having associated. therewith means to predetermine the line of rupture across said layer, and means arranged to rupture said layer at such predetermined line and to defleet the end-portion of the ruptured layer to facilitate its removal from the roll.

38. In a wet machine, a pulp receiving roll and a cooperating press-roll arranged to compress a layer of pulp on the pulp-receiving roll during the operation thereof, having associated therewith means to predetermine the line of rupture across said layer, and pneumatic means arranged to forcibly project air to rupture said layer at such predetermined line, and to deflect the end-portion of the ruptured layer to facilitate its removal from the roll.

39. A wet machine, comprising a pulp rereceiving roll and a cooperating press roll to press a layer of pulp on the pulp-receiving roll during the rotation thereof, an

opening or openings on the surface of the pulp-receiving roll, extending across the same, means to forcibly project air outwardly through said opening or openings against the inside of the layer of pulp, with sufficient power to rupture the layer of pulp entirely across the same and deflect it out- Wardly When the layer has reached a predeterinined thickness and when the openings and the axis of the receiving roll are in an approximately horizontal plane whereby the layer of pulp will be stripped from the 'roll by gravity and centrifugal force.

In testimony whereof, we have signed our names to this specification, in the presence 15 of two subscribing Witnesses.

HERVEY G. GRAM. CLIFFORD A. PARSONS.

WVitnesses GEORGE W. STEVENS, FRANK A. EMERY,

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G.

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