US1120433A - Paper-making apparatus. - Google Patents

Description

C. H. ATKINS.

PAPER MAKING APPARATUS.

APPLICATION 311.21) mm: 24, 1912.

Patented Dec. 8, 1914.

3 SHEETS-SHEET 1.

INVENTOR, 6724/166 H. Jar/aka ATTORNEYJ O. H. ATKINS.

PAPER MAKING APPARATUS.

APPLICATION FILED JUNE 24, 1912.

1 1 20,433. Patented Dec. 8, 1914.

3 SHEETS-SHEET 3.

lV/TNESSES: IVVENTOR,

ATTORNEYS crraaziiis-v Ht" AllKINS,; or-srmriewmm Massacauen'mrss rnrna mxme Annmarie;

Spe cificatioii :01 Letters Patent- Patented-Dec. 8,1914.

'To' all whom it mag concern":

Be it known-that I, vCiramias H.ATK1NS, a citizenof the United !States ofAmerica, residing at Springfield, inthe'county of 5 Hampden'and State ofMassachusetts, have invented newand useful Improvements in Paper Making 'Apparatuamf which thefollowing 'is' a specification;-

This invention relates to revolying suction rolls-for'paper machines: Itis especially adaptedfor use incylindermachines, but it is not-limitedto this specific use, since it can-be-used efficiently on-Fourdrinier machines-and" in many other connections.

The invention generally is} adapted to embody a suction roll, preferably rotating;

aroundwhich the paper is passed through part of a-revolution together with its carrying medium as felt in a cylinder machine or wire in a Fourdrinier-machine.- In'thepas sage of the paper-around the 'roll'for a con siderable arc means for extracting thewaterfrom the paper is prov'ided'and this means is so arranged that it operates one large area ofthe paper instead-'-of'*'a comparatively small area -as=has heretofore been the' necessary practice in suction rolls. Applicant preferably moves the aperand' roll ties involved by providing means where the paper enters on the apparatus and'where the aper leaves the apparatus to-cause the rea y assage of th'e paper in-the manner desir 1- In addition'torthe advantage ob'-- tainedin'havin the paper pass to and from the roll proper y other advantages are 'ob-' tained by the mean's'mentioned-fas for instancethe doing away with one'carrying felt. heretofore necessary in cylindermach'ines;

The object of'applicants inventionis to provide-animprovedapparatus of the class,

in the detailedidescription'and annexed].

mentioned which will operate successfully and have a great :capacity' for extracting, v

plication*,-Figure 1 -is a diagrammatioview of acylinder machine showing :=the appara tus as positioned with respect to the other elements embodied in the complete appara- We necessary for" manufacturing paper. Figu 2 is a partiallongitudinal sectional v1ewof-'- about' halii of the apparatus taken on"line-2-'--2 of-Fig; 3. Fig-'3 "is a sectional view 0n line 33'0f Figs 2.

Referring "to the-drawings, F ig. 1, a a a a4, and a represent tanks in'which the 1 paper is contained. A'' roll I) in each tank picks up th'e'paperstock therein' and transfers a certainamount of it to the -lower face of a carrying felt d; The roll 0 forces the felt at against the-face of'the rolls-b, inthe usual 'manner,"said roll-0 being regulated in the manner indicated The felt d travelsagainst the faceofieaehroll b'in the series of tanks, as indicated, and when it leaves the last *tank' it "containsh layer-of paper sufiicient in quantity ;to form.- the --paper' desired." Theielt then turns on the roll 0 of" the last *roller 'andipasses through a series of guiding rollers h to the suction roll 'gi- The felt-passes aroundthe-*guide-roller qZ' with? the paper-'next to that-rol1'and;then passesaround'the suctionroll orcylinder g;for'a part "of a' rotation thereof having the-felt 35 nextto this roll and then leaves said roller 9 and asses to farther guide-roller Z Dur ing t e-passageofthefelt around the roll 9 a great quantityofwater (in'proportion to the whole quantitycontainedby the paper) is abstractedtherefrom iiiamanner to be described. The feltfid carries the partially dried paper 'tothe ress roll is, where it leaves the paper an starts on its return travel to the ulp-cyli'ndersfo'r the described operation'to be repeated." The paper, which is now strong enough'to travel from roll toroll unsupported, passes'to the'roll' p and thento the drying cylinder 0, after which it is treated in, the usual manner;

In the operation of manufacturing paper, as described with this" invention, it is usually only necessaryto abstract the water from'the wet ulp at one main point; that is, at the position of 'the roll g. Iffdesired' lofi however, a series of-such rolls may be used' or the same may be used together with ap aratus heretofore used. This apparatus as illustratingone-way' iii-which the inventioncaribe carried out will nowbe' specifically described."

The large-'suctionroll is moimte'd' to rotate on the horizontal supporting pipe to on suitable bearings y. A stuffing box C is provided at each end to prevent communication between the atmosphere and the interior of the roll except through the perforations in the latter. The horizontal supporting pipe u is mounted at each end of the apparatus by the end frame pieces i To this horizontal supporting pipe to is fastened a dependent casting a which extends the whole length of the suction roll, as indicated, and is of a suitable width for a purpose to be described. To the outer edge of this casting a is fastened a diaphragm o, the other edge of which is held by another casting (1. which latter is adapted for a purpose to be discussed. This casting a has two longitudinal side pieces which bear with a corresponding surface directly against the inner face of the roll g through the entire length thereof, as indicated in Figs. 2 and 3. These side pieces are of suflicient width to a little more than cover all the perforations of the suction roll along two longitudinal strips of said roll.

Referring-to Fig. 3, the guide rollers Z and Z are similarly constructed. They rotate on-suitable bearings g which are supported by the horizontal pipe 1, the latter being held by the two end frame pieces A reviously mentioned as supporting the horizontal pipe u. shaped casting g rests against the inner face of each guide-roll through the entire length l thereof,-as indicated in Fig. 2. This boxlike structure has a communication with the pipe at through a conduit 1'" whichslides in ',a suitable pocket of the pipe 'n, as indicated "in Figs. 2 and 3. p The only difference between these two guide-rolls is that one has the box-like structure pressing against the inner face of the guide roller Where the outer face thereof is tangent to the suction roll, while the other box-like structure in the other guide-roll presses against the inner face thereof at a point distant from the tangent point. It is necessary to use the spring s in thev first mentioned case to keep the box-likev structure pressed against the inner face of the guide-roll Z, while in the second-tease the weight of this box-like structure gives'the proper pressure for the purpose desired.

As previously described, the felt 'carrying the paper enters on the roll Z and passes around said roll to the point of 'tangency with the suction roll, after .which it followsthe periphery of that roll around the greater part of its circumference until it reaches the point of tangency of the guide roller Z where it follows said roll and leaves the same at the point where the boxlike structure 9 is bearing against the inner 'face of said roll. In this travel of the felt with the paper, the apparatus operates as A- long narrow boxfollows: In passing around the roll Z the paper is next to the roll, but as the felt carries the paper to the suction roll g the paper is on the outside ofthe felt and the felt is next to the roll. In the passage of the paper from the roll Z to a position on the roll y it v is likely to tear or lap oil the roll Z, thus deout of the perforations in the guide-roll only at the point where the paper and felt leave that roll to enter on the suction roll. This pressure forces the paper and the felt away from the carrier roll to the suction roll in an efficient manner. On the other hand, when the paper and felt have passed around .the suction roll and are about to leave the guide roller Z it is necessary to again force the felt and paper away from that roll in order to prevent the trouble previously mentioned. This is done in a manner similar to that described in connection with roll Z except that the air pressure is applied at a different point. 'By the apparatus described it is seen that the felt and v the paper are carried to and from the sue-- tion roll in a fixed manner which will prevent v any breakage of the paper which would otherwise result from passing thefelt and. paper over a suction roll from areas of low and high pressure.

The specific operation of the suction roll J will now bedescribed.

The horizontal pipe u is connected to a suitable suction producing apparatus and the communication. of this pipe with the; pipe "m, and the two horizontal extensionsof the latter (see Fig. 3) communicatewith the interior of the suction roll 9 thus producing an area oflow pressure within that suction roll. of low pressure from being .estroyed by In order to prevent the area.

communication with the atmosphere, it is necessary to provide for the perforations between the tangent points of the two guide rollers Z and Z and this is done as follows:-

of the diaphragm 'v and since the under.

The two lower side edges of the casting a1; Y shaped as shown bear directly againstthe; r

side of diaphragm is exposed to an area of low pressure, the atmospheric pressure will force said diaphragm downwardly thus carrying the casting a downwardly and forcin the edges thereof into firm contact with t einner. face of'the roll 9 with sufii cient pressure to prevent any leakage' between the area of low pressure in the roll 9 and the atmospheric pressure. The suction in the pipe u .will relieve this pressure of the atmosphere against the diaphragm 'v to some extent, due-to the fact thatthe atmospheric pressure .will force the pipe at acting on itsarea upwardly, but the area of the diaphragm 4) being 'largeas compared to pipe m, the pressure of the atmosphere downwardly will be in excess ofthat tending to force the diaphragm-and casting a upwardly. p .7

' It will be seen' from the description that as-theip'aper passesaround the roll 9; on the outside ofthe felt, the water from the paper will .be suckedithrough the felt to the area of low pressure and pass up the pipem:to the'pipe: u and fromthere-out to any suitable point. 'It is found convenient in building-the apparatus to separate thewater and air leaving-the pipe at and force the air back through the pipes n of the guide rollers for the purpose described, although it is apparent that this is a merematter of convenience and not essential to the proper workingof the apparatus.

The rotation of the suction roll as 'well as both guide rollers may be obtained by the passage of the felt and paper which is held sufliciently tight against the rolls to give the required movement thereto. In passing a continuous strip of paper over the suction roll it is clear that out apart of the area of the roll can be use to carry the paper and if the periphery of the roll is .perforated to allow the water from the paper to pass through to an area of low pressure it is clear that that area of the roll not c'arrying paper must be taken care of in a way to prevent trouble or the atmospheric pressure will destroy the area of low ressure.

In addition to the above consi erations in the operation of a device embodying applicants invention there is the problem of eading the paper to and from the suction roll. In the machine described only one felt or carrying medium for the paper is used whereas generally in cylinder machines "it is customary to use two felts with the paper carried therebetween. Applicants apparatus renders one felt only necessary for such a large amount of water is taken from the paper at one time that the paper does not need to travel to and from as -many water extracting devices as is now customary. The lower outer edge of the casting a as shown defines the area of the roll which is not used to carry paper and the perforations in the roll together with the casting a allow the atmospheric pressure to bear on the upper side of the diaphragm '2; which carries and thus forces the casting a into its proper bearing function. The pi e m is carried by casting a and is provi ed with two horizontal extensions to each side of said-castingto communicate with the. area The paper'takes a rather sharp bend when- I ever it leaves eitherroll l or Z and is liable as stated to break or be injured at these points. The device-shown however forces the paper from the'roll at the'proper points and thereds therefore no liability to stick. The apparatusrhasbeen shown with a cylinder machine. 5 :It is clear however that Fourdrinier machines can be fitted with this suction roll for-the paper carryingmedium of any description can be led around said roll with the desired results.

The apparatus can be put to. many analogous uses to the ones mentioned such as drying cloth *or wherever it is =desired'to cause the rushof airlthrough a'continuous moving'strip ofmaterial.

Applicant has described a specific form ofapparatusr as illustrating one embodiment of 1115 invention. The invention can be sinbodied -.in various :other s ecific forms without departing from; the f eatures thereof 'as defined 'in :the following claims.

WhatI claim, is 2- *1. 111 ---a device of rthe class 'described, 'a

hollow perforated cylinder mounted to rotate, a suction chamber therein COIIIIIlllIlleating with an exhausting passa e, means to guide apaper-supporting we to said cylinder to rotate through a certain arc t erewith during which time the perforations of the cylinder in the certain arc are closed by the web, and means to revent the remaining perforations in the cy lnder from establishing communication between the suction chamber and the atmosphere, said means comprising a frictionally engaging device to engage and shut off the arc of the cylinder not covered by the web and inc a uding means whereby said frictionally comprising a box suitably supported having...

(perforated cylinder mounted to-rofor one side a frictional device to engage the surface of the cylinder forthe arc last mentioned to establish atmospheric pressure in said box, a diaphragm, one side subject to pressure in the suction chamber and the other to atmospheric pressure, supporting said box and tending to force the same into frictional engagement with the cylinder.

3 in a device of the class described, a hollow, perforated cylinder mounted to rotate, a pipe mounted therein with a communicating passage to the interior of the cylinder whereby a space of low pressure can be obtained, an arc-shaped box-like device, means to force said device into frictional contact with the inner face of the cylinder, as .the latter revolves, comprising a diaphragm, a support therefor, means to connect the movable part of the diaphragm and the device, said four last named elements forming a chamber subject to atmospheric pressure due to the device and cylinder, said diaphragm being so mounted that one face thereof is subject to the low pressure space, and the other face to the atmospheric pressure, for the purpose described.

4:. Ina device of the class described, a hollow, perforated. cylinder mounted to rotate, means for obtaining a low pressure spacewithin the cylinder causing the air to rush through the perforations to said space, and means space through said perforations while they for preventing air reaching said I phragm supportlng said block to maintain said subject to pressure in the box and to pressure within the cylinder, yielding means to aid frictional engagement. 5. In a device of the class described the combination of a rotatable roll surrounding a suction chamber, perforations through said roll to the chamber, perforated rotatable guide rolls arranged to guide a continuous web to and from said first mentioned roll for rotation therewith through a certain arc, a device to prevent the perforations frictional engagement having one face the other and other 1n maintaining 'Sfi-ld in the roll from communicating with the suction chamber as the roll rotates through the remaining are of its circumference, and a device located within each guide-roll operable to press against the inner face of said roll at the point where the continuous web leaves the same and adapted to guide a pressure fluid through the perforations at that point to aid the web in leaving, all for the purpose described.

CHARLES H. ATKINS.

Witnesses FRANKLIN G. NEAL, K. I. CLrfMoNs.

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