US1581656A - Paper-making machine - Google Patents

Description

April 1926. N- MON AGHAN PAPER MAKING MACHINE Filed Jan.- 20, 1921 v 3 Sheets-Sheet l April 20 192 I,a8i,656

F. w; MONAGHAN PAPER MAKING MACHINE Fil ed Jan. 29,1921 3 sbeets-sh et' 2 I April? 2@, 192 $581,656

F w. MONAGHAN PAPER MAKI'NG MACHINE Filed Jan. 20, 1921 3 Sheets-Sheet 5 wumtoz ,w w Am /4.. 35 QttozweagO Patented Apr. 20, 1926.

UNITED STATES FRANK w. MONAGHAN, or \VATERTOWN, NEW YORK. AssrGNon T0 was eAeLnY AND SEWALL COMPANY, A CORPORATION OF NEW YORK.

PAPER-MAKING MACHINE.

Application filed January 20, 1921.

To (/7? whom it may c ncern:

lie itv known that I, Fawn W. hlONAGI-iAN, a citizen of the United States, residing at Water-town, county of Jeli'erson, and State of New York, have invented certain new and useful Improvements in Paper-Making l\'lachines, fully described and represented in the following specification and the accompanying drawings, forming a part of the same.

This invention relates to certain hum-ovemeuts in paper making machines, and has been designed particularly for. use in that type of machine employing a wire, as the l!our lrinier machine.

in the nianitfacture of paper on this type of machine, the stock which is to be made into paper is fed continuously to the wire section of the machine in the form of pulp or stock mixed with a "quantity of water. This pulp mixed with water is flowed on to the wire from a flow box past a slice and the web is formed on this making wire. This wire is as well known, a continuous wire section of a suitable mesh which is given a' travelling movement, and which passes during this movement over a. series of rolls called table rolls and over suction boxes, the function of these rolls and suction boxes be ing to extract the water from the pulp on the wire and to support the wire during the formation of the web or sheet. After the pulp on the wire has passed the suction boxes, it is formed into the sheet but is still wet and weak. After the formed sheet leaves the wire, it is carried on a continuous l'elt band to and through a series of rolls known as press rolls which further remove tree moisture from. the sheet not taken out at the suction boxes. At the point where the web or sheet leaves thewire there is a gap across which the web is led to the felt. l'leretotore diificulty has been experienced in getting; the web which is still wet to leave the wire so that it will cross this gap to the felt. In constructions asheretofore used, furthermore, the web is drawn across the gap from the wire to the felt by the pull on the web.

Serial No. 438,602.

As the web is still wet and weak and is felted into the wire the pull necessary to thus tree the web from the wire and carry it across the gap causes breaks in the web.

it is one object of the present invention to provide means whereby the web may be freed from its felting on the wire and removed therefrom throughout its width and yieldingly supportedon a layer or cushion of air from oii' which the web taking devices, such as ielts, draw the web across the gap. The draw or pull necessary is thereby reduced and the consequent tendency of the web to break between the wire and the web taking devices is greatly'decreased.

lVith this and other objects not specifically referred to, the invention consists in certain novel parts and combinations which will be fully described in connection with the accompanying drawings which show a preferred construction for effecting the object of the invention. 1

In these drawings Figure 1 is an end elevationof so much of a Fourdrinier paper machine as is necessary for an understanding of the invention.

Figure 2-is a side View partly in section and partly broken away of the construction shown inFig. 1, looking in the direction of arrow 2 of that figure.

Figure 3. is a cross section through the couch roll and adjoining parts, the section being taken on line 33 of Figs. 2 and 6.

Figure i is a sectional side View of the construction shown in Fig. '3 with the couch roll removed, the section being taken on line H of Fig. 3.

Figure 5 is a top plan view partly broken away of the construction shown in Fig. 4:.

Figure 6 is a view similar to Fig. 4 on an enlarged. scale, partly broken away with certain parts omitted.

Figure 7 is a detail sectional view on an enlarged scale, the section being taken on line 'f7 of Fig. 6.

Figure 8 is a detail sectional view, the section being taken on line 8 8 of Fig. 6.

Figure 9 IS a detail sectional side view of the valve for control ing the entrance of air;

Figure 10 is an end view of the construction shown in Fig. 9 looking to the right in that figure;

Figure 11 isa detail view of the valve plate.

I Figure 12 is a detail edge view of the plate shown in Fig. 11.

Figure 13 is a detail view partly broken away of one of the valves shown in Fig. 9. Figure 14 is an edge view of the same.

Figure 15- is a detail sectional view taken on line 15-15 of Fig. 4;and

Figure 16 is a perspective viewof the main controlling valve plate.

Referring now to these drawings and first to Fig. 1, the continuous making wire is indicated by .the letter WV. This wire is given a continuous travelling movement from the flow box and'over table rolls and suction boxes (not illustrated) to the couch roll indicated by the numeral 1. This couch roll is driven in any suitable manner, as from a gear 2 indicated in dotted lines in Fig. 1, and is supported in frames 3 on each is led to the web taking devices, shown as the I is drawn by side of the machine. The wire passes to this couch rollover a guide roll 4 around the couch roll and back over a carrying roll 5. Located adjacent the couch roll 1 is a driven paper roll 6 hereinafter referred to, under which the web .of paper indicated at 7 felt 8. This felt is a continuous travelling band passingover a roll 9 to and between the press rolls, a pair of which are indicated at 10, and back to the roll 9 ever felt roll 11.

The web of aperis drawn by the felt across the gap between the couch roll and the feltto and between the press rolls. In accordance with the invention means are provided for freeing the web from the wire."

and yieldingly supporting it as it is separated so that'the felt draws the web from off this yielding surface and the strain necessary to pull the web away from the wires is lessened and breaksin the' we-b are less liable to occur. In the preferre' construction this separation is eifectedby roducing a fluid pressure under the web W 'ch,'in addition to, separating the web from {the wire, forms a layer or cushion to yield ngly support the web asi t leaves the wire, that is, a fluid layer is formed under the web on which the freed web floats. This pressure fluidis preferably air and a layer of ainis formed under the web from the top of which layer the web the feltacross the gap. This air is supplie substantially evenly across'the roll which is of considerable width, sothat the sheet leaves the wire throughout its width. p

The specific construction employed for effecting this may be somewhat varied. A convenient one, however, and one which has late and its co-operating valves worked well in menace practice is that illustrated and which will be described. v

In the machine selec'ted'to illustrate the invention, the couch rollis a suction roll, that is, suction means are provided cooperating with the roll to suck out additional water from the-web not removed by the suction boxes. In the particular construction illustrated the roll has a perforated surface,

by the vn5 the perforationsbeing indicated numeral 12. This roll rotates past a chamber which is provided in. a casting spring-seated as indicated at 14 in the frames 3 of the machine before referred to, so as to extend through the roll.

chamber is indicated at 15 and suction communicates through a pipe 16 with any suitable suction apparatus not illustrated. Suction' chamber 15 connects through ports 16 (see Fig. 4)

with a chamber 17 which connects through ports 18 with a chamber 19 formedby two spaced extensions 20, 21 rising from the cast: ing 13 before referred to. This chamber 19 communicates with the ports 12, and as the couch roll rotates over this chamber carrying the wire with it, water is sucked through theports 12 and into the chamber 19. Packing 22 is provided at the sides to form a close rality of passages 25,

lit between the interior of the roll and the casting. there is provided meansfor admitting a current of air under suitable pressure through this perforated couch roll, where such construction is employed, so as to free the web from the wire throughout itswidth after the roll carrying the web and wire has passed the suction chamber, and for yieldmgly supporting the web at the point Where it is freed from the wire. Various -construc-.

tions may be en'iployed. Such constructions,

preferably include means a substantially even current ofair however, will whereby. may be distributed along the roll, and furthermore will include means wherebythe air v delivered at any point of the roll may ments having been made, air may be adfore referred. to is partitioned off at one end by a partition 23 best shown in Fig. 7

and in dotted lines in Figs. land 5 to-for a pressure chamber to which air under pressure may be admitted through'a pipe 24 apparatusiiiot er from any suitable compressor illustrated. From this chamb sad it 26,, 27, Qirnd 29 formed in casting 30 securedihyholts 31hr in any other suitable manner to the casting 13 before referred to away from or after the suction chamber-.19; -While five of these passages-have been illustrated; it thelrzcom t trolling valves hereinafter referred to will will be understood that they and" This suction 80 In accordance with the invention 90 varied as desired, and the required ad ust- 1 that side of be provided in such numbers as may be required. These passages connect through narrow ports formed in an extension of the casting 30, with the interior of the couch roll and closely adjacent one of the extensions 21 before referred to. On the opposite side of these ports the extension 30 is provided with an adjustable packing strip Bot) reachiag nearly to the interior surface of the roll.

At each end of the chamber thus formed is provided a block or parking 301 which keeps the air from escaping endways.

The extension 21, the strip 300 and the packing 301 thus form a chamber, which confines the air issuing from the ports 33 and directs the air out through the perforations 12 in the roll and acts to free the web from the wire at the desired point.

The admission of air to the passages S 29 inclusive is cont rolled so that the amount of air supplied through any passage may be varied imlependenlly of the air supplied to any other, so that the expansion of the air it passes lengthwise of the roll may be compensated for aml the passages so ad] usted that air under substantially similar pressure will be delivered from all the ports, so that the sheet will be freed from the wire evenly throughout its width, and consequent breakage thereby prevented.

1n the particular construction for effecting this object, there is provided what .may be termed a main gate valve which slides in groove 36 formed in the walls of the chan'ihei. casting13 before referred to. This valve plate is connected by a rod 37 and a link 38 to a lever 39 pivoted at 40 to a bracket 41 supported from the frame of the machine. The inner wall of the pressure ehan'iber 30 is formed of a plate 42 secured to a wall of the casting 13 by screws 420. This plate 42 is a valve plate and is formed wi h a succession of stepped seats 43. Each of thcseseats 43 extends beyond an adjacent seat so as to form with co-operating valve openings or ports 4421s clearly shown in Figs. 9 and 11. formed as shown in Fig. 12 with a guide surface 45 cut to form grooves 46 which extend in under the seats 43- at each side. Gopperating with the valve plate 42 are a plurality of valves 47, 48, 49, Strand 51, one of these valves being provided to control one of the passages beforereferred to. These valves are in the form of slides having a grooved under-portion 52-which slides on the guides 45 before referred to and an extension or leg 53 which slides into the groove 46 in the seats 43. These valves also dovetail into each other, and to effect this the top of each of the valves 48 to 51 inclusive, that is, all of the valves below the first one, are formed with a oroieetion 54 Each of these, seats is shaped like the seat 45 before referred to, which slides in the groove of the valve. The valves can thus be interlocked, and escape of air therebetween, except from the ports, prevented. The ports 44 connect with each of the passages 25 to 29 inclusive and by lllll-- nipulating the slide valves the area of the ports can be adjusted so as to admit more or less air to each passage.

These slide valves may be adjusted in any suitable manner. in the particular construction illustrated, each valve is provided (see Figs. (3, 7 and ill) with a projection 55' in which is secured by a screw to one end of a rod 57. The other end of these rods are threaded, as indicated at 58, and pass through the end wall of the casting SU and through abrackct 51). These rods have at one side of the bracket collars or) and at the other side set-up nuts '61 'by turning which the screws and through them the slide valves may be adjusted to open and close ports 44 as desired.

When these valves have bQCll-lltljllSllCtl to the air pressure which it is desired to use for any particular weight of web, the main valve"l5 is operated by le\er 239 to open the ports 44 so that air may be simultaneously admitted from the pressure chamber through such ports as are opened through the passages and along the roll.

The air undersuitable pressure frees the web from the wire and forms a layer or cushion of air under the web, this layer or cushion being formed in part by the resistance olfered by the web. To ensure the proper maintenance of this layer or cushion the web, after it is freed from the roll is preferably led close to the roll for a ways to offer a resistance close to the roll between which and the web the layer forms. \Vhile this may be done in various ways, as shown, the paper roll. (3 employed for the purpose, being located in close to the couch roll so as to hold the web in close to the couch roll and prevent the dispersion of'the air without theforniation of the layer or cushion from which the felt draws the web.

In the operation of the device the valve 47 is opened to tldlllllisitll under pressure i through the first passage :25) shown at the left hand end of the roll in Fig. 6. This air acts to free the taili of the web, which is a narrow strip separated from the inain web body, and which is first led over to the felts at the start of operations. This tail.

freed from the wire and suplxn'ted on the an: layer or cushion and draws oil this layer or cushion by the felt, and the. web is thus started to the press rolls. As the operation proceeds and the-full width of the web is to be taken off the wire, the controlling lever 39 is operated to open the other passages for the admission of air to loosen and free the Web gradually the entire Width and supgreatly reduced and danger of breakage to a very large extent is overcome, particularly when operating at high speeds or with thin webs.

lVhile the invention has been shown and described inits preferred forms, it will be understood that various tuprangemeuts may be provided for producing this air cushion and that the invention is not; to be limited to the particularvalve eotuetrtwtion and arrangement shown and described,

What is claimed is:

. 1. 111 a paper making machine, the 0011?,

--bination with a couch roll and the-wire, of

means for producing a lluid pressure under the web throughout its width to remove the web from thewirc and. to yucldxhgly support it, means l'or controlliug the lluid pres sure. at various points throughout the width bination with a' couch roll and the wire, of

means forv producing an air pressure under the web throughout its width to remove the {m V, nec'tions 1 air under wcb'l'rom the wire and to yieldingly support it, means for cont'rt'illing the air pressure at various points throughout the width of the web, and web taking-devices for drawing away the web thus supported.

3. In a paper making machine, the combination with a couch roll and the wire, of means for producing an air current, a plu rality of valves for controlling the air, connections from the valves extending widthwise under the web, and means for adjust ing the valves independently of each other.

4. In a paper .niaking machine, the combination with-a couch roll and the wire, of means for producing an current, a pint' valves for antenna-g the'i air, con.- therefrom extending widthwiseunder the web, means for adjusting the valves independently of each other, and means for controlling the air admitted througha number of the valves simultaneously.

In a paper making machine, the com bination with a couch roll and the wire, of a pressure chamber, means for supplying pressure thereto, a plurality of *v-alves in t ie chamber, passages from the valves opening at various points widthwise under the web, means for. independently adjusting the valves, and means :tor controlthe air admitted through a number of thc ivalves simultaneously.

6. In a paper mak'ng'machine, the chmbination" with a perforated couch roll and the wire, of means for passing air under pressure throu h the roll under the web to, remove thewe from the wire throughout its width and to form a layerof air under, the web to support it, means for controlling the air pressure widthwise of theweb, and web taking devices drawing the web oil the layer of air.

7. 1n a paper making machine,- the c01 n bmalton with a perforated couch roll and the wire, of means for passing fluid under pressure through the roll under the web to remove the web from the wire throughout its width and to form atluld layer. under the web to support it, means tor controlling the;

' fluid pressure widthwise of the web, and web taking devices drawing the web oil the fluid layer.

8. In a paper making machine, the combination with a perforated couch roll and the wire, of a pressure chambeiypassages ex-.

v tending from the chamber within the roll and opening at dili'erent points widthwisev thereof, adjustable valves controlling. the

passage, and a main valve common to and t controlling the admission of pressure'fluid through certain of the adjustable valves.

t). in a paper making machine, .the combination with a perforated couch. roll and the wire, of a pressure chamber, passages extending from the-chamber within the roll and opening at difi'event points .widtliwise thereof, a stationary valve plate, adjustable valves co-operating with the plate to control pressure to the passages, and a movable main valve plate common to the valves for simultaneously controlling the passage of pressure fluid through certain of the adjustable valves.

10. In a paper making machine, the coinbination of a couch roll and the wire,- of

passages opening along the roll at different POlIllS widthwise thereof, an ad ustable valve for each passage to control admission of pressure fluid thereto, and a main valve controllingthe admission of fluid simultaneously through all the i adj ustiable valves.

11. In a paper making machine, the com binat'ion of a couch roll and the wire,- of passages of different lengths opemngalong:

the:roll, an adjustable valve for each passage, and a main valve controlling-the admission of pressure fluid simultaneously through the adjustable valves.

12. In a paper making machine, the com bination with a. couch roll and the wire, of

air. pressure means acting to remove the web from the wire throughout the width of the web, means for holding the web .close 7 to the couch roll after its reinoval to form.

an air layer between the Web and the roll.

on which the freed Web floats, taking devices for drawing 011? this layer.

13. In a paper. making machine, the combination of a couch roll and the wire, oi air pressure means acting to remove the web from the ire throughout the Width of the and web the Web from web, a roll located adjacent the couch r011 for homing the Web close to the eeuch roll 10 I for drawing the Web from ofl. this layer.

In testimony whereof, I have hereunto 15 set my hand.

FRANK W. MONAG'HAN.

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