US2943678A

US2943678A - Paper making apparatus

Info

Publication number: US2943678A
Application number: US659947A
Authority: US
Inventors: Paul A Fasoli
Original assignee: Sandy Hill Iron and Brass Works
Current assignee: Sandy Hill Iron and Brass Works
Priority date: 1957-05-17
Filing date: 1957-05-17
Publication date: 1960-07-05
Anticipated expiration: 1977-07-05

Description

Filed May 17, 1957 2 Sheets-Sheet 1 fill/11,111.

INVENTOR.

July 5, 1960 P. A. FASOLI 2,943,678

PAPER MAKING APPARATUS Filed May 17, 1957 2 Sheets-Sheet 2 7 2,943,678 PAPER MAKING APPARATUS This invention relates to improvements in paper making apparatus and. is directed more particularly to apparatus whereby a web is formed on the upper portion ofthe ascending side of the foraminous surface'of a cylinder.

According to one novel feature of the invention-cooperating means is provided for controlling and regu- S ates Patent "ice 2,943,678 a 1 Patented July 196g A the cylinder is supported by the supports 10, for rotation lating the flowof stock onto the sheet forming portion of the surfaceof the cylinder. The stock is controlled and regulated in such a manner that the volume ,and'

yelocity .of stock may be withinpredetermined limits whereby 'webs of various calipers and types may be formed with uniform fiber distributionpand at .high

speeds.

According to another novelfeatureofthe invention on a horizontal The cylinder may be rotated by various means but for illustrative purposes one of the rings 7 is provided with gear teeth 16 which are in engagement with a driving gear 18 of a shaft 20 that is journalled in bearings 22, integral with the sideframes. The shaft may be driven from any suitable source such as a motor, not shown. a Y V i A head box or stock pondis formed by g-transversely spaced side walls 24 extending rearwardly'from Opp site ends of the cylinder. Forward or inner ends of the walls 24 will be sealed, in the usual manner, to opposite ends of the cylinder. A rear. wall '26 and abottom wall :28 are connected to rear portions of the side walls 24. s

A stock inlet 29 is provided which for illustrative purposes has inner and outer walls 30 and 32 which flare upwardly, as shown. I

The stock inlet may take the form of a multiple manifold where a pipe or pipes branch to plural pipes. Such results in a self cleaning system and provides uniform entry of stock into the pond chamber.

The foraminous surface ofthe cylinder is represented diagrammatically by F, in Fig. .3, for clearness.

The inlet wall 30 terminates in an upper apron which may terminate in a flexible sealingrnernber 34 secured and in combination with the means for controlling and regulating stock there isprovided for cooperating there with means for dewatering the sheet and separating air 2 and water and for eliminating the same to the end that high speed operation .may be attained. ;Altogether the stock controlling and regulating means and the-air and water eliminating meanscooperate to facilitate not only high speedoperation, but the production of a web or sheet having desired predetermined characteristics by the utilization of. various sheet forming materials.

The novel features of the apparatu s of the invention Will be observed from the disclosure of the present preferred form of the invention. a In the drawings:

Fig. 1 is a side elevational view of paper making apparatus embodying the novel features of the invention;

Fig. 2 is a sectional view on the line 2--2 of Fig. l;

.and

Fig. 3 is a horizontal sectional view through the apparatus shown in Fig. '1.

- end rings,such as 7, in Fig. 2 are provided and have a :tubular member extending therebetween and secured at opposite ends thereto. The circumferential member will be in the form ofa perforated tube 8 and-may be covered with wire cloth 9. V

and .cloth, well known in the art, will provide thedesired .foraminous surfacevv for the spokeless, hollow; cylinder formed by the ringsand surface, The foraminonssnr- Various arrangements or plate face is represented diagrammaticallyby-F infFig. 3.1

Supports, such as -lll, arevprovided andhave on their upper sides sho es, such as 1 2, of suitable bearing material. vThe end rings 7 are providedwith circumferential,

grooves 14 in which the shoes 12 are receivable whereby "as shown. Opposite sidewalls, suchwas 44 .connectwthe walls 38, 40 and 42 of theregulator, and are disposed adjacent inner sides of the walls 24. U

The regulatoris movable up and down towards, and

away from the cylinder, and is tiltable so that its inner or cylinder wall 38 maybe adjusted to a desired predetermined position relative to the upper portion of the ascending sideof the foraminous surface of the cylinder. j For this purpose brackets, such as 46 are slidable along upper edges of the walls 24. Threaded rods 48 pivotally connected at lower ends on pins 50 of the regulator side walls 44 are slidable in opposite ends 47 of the members 46. Nuts 52 threaded on the rods 48 may be turned to raise and lower the regulator. They'may be turned relative to one another so as to tilt the regulator, as may be desired.

Brackets 54 are secured to outer sides of the pond walls 24, see Fig. 1. Rods 56 are rotatable in the brackets and carry manually engageable members 58 to facilitate turning of said rods. The rods 56 threadedly engage portions 49 of the members 46 whereby as the rods are turned in one direction or the other the members 46 are moved back and forth, to move the regulator back and forth.

I vertically relative to the upper end thereof for establishing stock leyel. Rods 62 have lower ends secured tothe gate-60. Upper ends of the rods are threaded and are slidable in a transverse member 64 secured to the walls 24'. Nuts are in threaded engagementwith the rods 62, and by manipulation thereof the' rods are raised and lowered to adjust the position of the gate 60.; V

A holey roll 67 of usual form, and waitrnewn in fl ,Asin Fig. V "nal side at 112. A lower tube 114 has an open side 11 6," and a partition '118 extends between the tubes- 110 "and"1*14.' Partitions 120 and 122 extend outwardly from lator. Said holey roll is important in that the wall there 1 of being perforated for the stock to pass therethrough brings about small turbulences as distinguished from major or greater turbulences This results in'unifornr fiber distribution and the desired intermin'gli'rig thereof. f

A throttle valve 68 extends transversely between the Walls 24 and in an upflow passageway 70 between the rear regulator wall and wall 33. A shaft 69 of the valve is 'suitably-journalled relative to the pond walls and carries' a lever 72, see Fig. l. A segment 74 fixed to the wall 24 has a plurality of grooves 76. The lever 72 is fixed to the shaft 69 and has an end portion 79 which is "receivable in the grooves 76. Said lever 72 is utilized v to turn the shaft 69 to position the valve as desired. The lever is held in'adjus'ted position by its end being seated in a groove of thesegment.

'Stock from the inletis directed by the inner wall of the regulator'onto the ascending upper portion of the surface of the Cylinder.

The throttle valve 68 is normally adjusted to a partly open position. 4

The regulator is adjusted to position the inner wall thereof relative to the ascending surface of the cylinder thereby to obtain the desired velocity of stock onto the cylinder. The relation of the cylinder surface and inner wall of the regulator will be such as to result in a stock velocity according to the characteristics of the stock, surface speed of the'cylinder and other variables. To increase the velocity of stock inthe forming area, thethrottle' 'valve 6 8 is adjusted to or towards the closed position thereof a Stock flowing upwardly in the passageway 70 passes over the gate 60 and out anoutlet 80. Stock flowing up and over the inner wall of the regulator is recircuflated to the stock source through an outlet 82 and'an outlet 84 in a wall 24 of the pond. Recirculation of stock is moreor les's optional.

Stock flowing over the gate 60 flows out an outlet 80. i? In a general way a portion of the stock flowing through the forming area flows upwardly over and into the regulator, and a portion of the stock flows upwardly in pets 'sa'geway 70, according to the position of the valve 68. As is usual overflow stock may be taken with white water for rescreening, or isolated and recirculated to a 'point ahead of the apparatus.

An integral structure made up of compartments for separating and eliminating air and water will now be referred to. Opposite end plates 90 within the ends of the cylinder are adjustably supported by the side frames, and are held in transversely spaced relation by elongated transverse members to be described.

Struts such as 94 are secured to and extend outwardly from the plates 90, see Fig. 2. Threaded studs 96 extend upwardly from the struts and straps 98 loose there- 'on bear on the ledges 6 and struts. Nuts 100 on the studs bear on and draw the struts towards the ledges. There are pads 102 of the struts bearing on the inner surfaces of the ledges, see Fig. 2.

The plates may be circumferentially adjusted as desired "by loosening and tightening the nuts 100.

Elongated tubular members and partition walls extend between the end plates and are secured at opposite ends 'to said plates,'as by welding. These provide a plurality of compartments inside of the cylinder including air and water separators. 3 a central tube 110 has an open longituditheftubes 110 and 114 and with tube 114 aside of tube '110 provide a compartment A. A transverse tube'12'4 extends between the plates 90 in the compartment'A and "has an opening 126 along a side thereof for the withdrawal of A partition 128 extends outwardly from tube 110. Partitions 120, 128 and said tube provide a compartment B. A transverse air tube 130 between the end plates in said compartment'has an open air inlet side 132.

An outer forward tube 134 extends between the end plates 90 and has an opening 136 on a side thereof. A partition 138 extends betweeni tubes 110 and 134, and a partition 140 extends outwardly from the tube 134. An air tube 142 and a partition 144 extend between the end plates 90, and said tube 142 has an open side 146. The partitions 128, 144 and outer sides of tubes 110 and 142 providea compartment C.

The partitions 140, 144, 138, outerside'of tube 110 and tube 134 form a compartment D, having the air tube 142 therein.

A conduit has an inner end in communication with compartment C. V

Elongated yieldable sealing members, such as 152, are secured to outer ends of the outwardly extending partitions and engage the inner side of the foraminous surface of the cylinder, to seal the compartments.

Portions of the end plates 90 carry yieldable sealing members 154 engaging inner sides of the cylinder and are secured to the plates 90 by members 156, see Fig. 2.

Lower elongated members '160 extend between the end plates and have opposite ends secured thereto, as

I by welding. Angle members 162 are adjacent and secured to the members 160, and carry elongated bearing strips 164 which are preferably formed from wood.

The end plates and componentssecured therebetween provide a unitary structure which may be circumferentially adjusted.- The bearing strips 164 are adopted for sliding along within the cylinder as the structure is in'- sorted in or withdrawn from the cylinder.

The tubular members of-the air and water separator structure may be connected to conduits at opposite end plates90 by flanges of the conduits securedfby bolts to said end plates. Openings such as are associated with the; end plates, as in Fig. 1, for securing flanges thereto.

Where conduits are connected to one end plate the tubes at opposite ends at the opposite end plate may be closed by blank flanges, secured to the other end plate.

The larger of the tubes or water tubes will be connected by means of conduits extending to a seal box or boxes,

drop leg, or to a water removal pump.

The relatively smaller tubes or air tubes may be connected by conduits to a vacuum pump, or to a header connected to such a pump.

Thus air and water areseparated in the several compartments of the structure.

The arrangement is such that compartment A underlies the sheet forming portion of the cylinder, whereat there is rapid dewatering which contributes to high speed operation.

Compartment B functions to bring about appreciable dewatering following the formation of the sheetover compartment A.

a roll P, as in Fig. 3 centrifugal forces are balanced so that water does not come-out to injure the formed sheet land makes it possible for the feltto pickup the sheet.

Eromthe foregoing it will be observed that the holey frollpromotes' micro or small turbulences and dampens out rnajonturbulences to bring about the desired unithe sus- Theregulator, with 'the throttle in a partly open position, is adjusted so that the inner wall thereof is related 75 to the surface of the cylinder, according to the volume ing portion of the cylinders surface.

of stock through the inlet to bring about the desired velocity of stock onto the forming portion of the ascend- Stock velocity in the forming area may be increased by adjusting the throttle valve to closed position.

The stock will be controlled and regulated with reference to the characteristics of the stock, and the sheet to be formed so as to produce a sheet of the desired caliper and other characteristics, at a maximum of speed.

The air-water separator structure is such, and is so connected to a source of vacuum and water removal means that there is rapid dewatering over-the compartment A where the sheet is formed, thereby contributing to the desired high speed operation.

Following dewatering by compartment A there is further dewatering by compartment B, and the vacuum in compartment C has a balancing function as described. The suction action in compartment D is such as to remove and purge the surface of the cylinder of water.

As explained stock flowing over the upper end of the regulator is recirculated, and as described the air-water separating structure is circumferentially adjustable to relate the compartments to the cylinder in different ways.

The adjustability of the regulator relative to the volume of stock supplied through the inlet makes it possible to control and regulate stock velocity in the forming area, while the adjustability of the throttle valve cooperates with the regulator to vary stock velocity. .Stock flowing upwardly past the forming area, and stock flowing upwardly past the throttle valve may be recirculated. In operation it is advisable that portions of stock supplied through the inlet or distribution system overflow past the throttle valve, and upwardly beyond the regulator whereby said stock may be rescreened or recirculated to the stock supply. The valve 68 is particularly important in that it may be adjusted to create back pressure against the means for delivery stock such as a pump, or other head producing device. This makes it possible to control the flow of stock to the sheet forming area to a fine degree.

Having described the features of the invention in the form at present preferred it is desired to be limited, if at all, by the appended claims rather than by the foregoing description.

What it is desired to claim and secure by Letters Patent of the United States is as follows:

1. In paper making apparatus having transversely spaced open ended opposite end frames supporting an open ended elongated tubular cylinder having a forminous surface for rotation on a horizontal axis and a pond chamber having an outlet onto the upper quadrant of the ascending side of the cylinder, the improvement in unitary dewatering means for dewatering a web of paper making stock formed on the surface of the cylinder comprising, a pair of opposite end plates, mounting means mounting said end plates relative to the end frames and in the open ends of the cylinder, said end plates being held in transversely spaced relation by a plurality of separate elongated water and air tubes extending longitudinally through the cylinder and having opposite ends thereof secured to said plates in openings provided through said plates, each said tube provided with a low gitudinally extending inlet opening in a side thereof,first Wall members extending between and connected at opposite ends to said end plates and extending outwardly from certain sides of the openings of the water tubes to the inner side of the surface of the cylinder, second wall members extending between and connected at opposite ends to said end plates and extending from other sides of the openings of certain water tubes to an adjacent water tube, said first and second wall members arranged in conjunction with said water tubes to form a plurality of separate compartments each having a water tube and an air tube extending therealong with the openings thereof in communication therewith and providing side by side openings into said compartments adjacent the inner side of the surface of the cylinder, said mounting means arranged for movements of said dewatering means in opposite directions circumferentially relative to the axis of rotation of the cylinder'to adjusted positions.

2. The improvement in means for dewatering stock set forth in claim 1 wherein the air tube of each compartment is disposed outwardly relative to the water tube of said compartment. I i 3. The improvement in means for dewatering stock set forth in claim 1 wherein the air tube of each compartment is disposed outwardly relative to the Water tube of said compartment and said air tubes are of relatively less diameter than said water tubes.

4. In paper making apparatus having transversely spaced open ended opposite end frames supporting an open ended elongated tubular cylinder having a forminous surface for rotation on a horizontal axis and a pond chamber having an outlet onto the upper quadrant of the ascending side of the cylinder, the improvement in unitary dewatering means for dewatering a web of paper making stock formed on the surface of the cylinder comprising, a pair of opposite end plates, mounting means mounting said end plates on the end frames with said plates disposed in the open ends of the cylinder, said end plates being held in transversely spaced relation by a plurality of separate elongated water and air tubes extending through said cylinder and having opposite ends secured in openings provided in said end plates, said water and air tubes provided in a side thereof with longitudinally extending openings having opposite longitudinal sides, a pair of partition walls extending between and connected at opposite ends to said end plates and extending radially outwardly from the opposite sides of the opening of one said water tube to the inner side of the surface of said cylinder, other radial partition walls extending between and connected at opposite ends to said end plates and extending radially outwardly from one side of the opening of the other water tubes to the inner side of the surface of said cylinder, further walls extending between and connecting said end plates and extending radially outwardly from the opposite sides of the openings of said other water tubes to the said one water tube, said walls of the pair thereof said other walls and said further walls arranged and cooperating with said water tubes to provide compartments having circumferentially spaced inlets at the inner side of the surface of the cylinder with the opening of a water and of an air tube in communication with each compartment.

References Cited in the file of this patent UNITED STATES PATENTS