US1594473A - Apparatus for the manufacture of paper - Google Patents

Description

Aug. 3, 1926.

V. D. SIMONS APPARATUS FOR THE MANUFACTURE OF PAPER,

Filed Sept. 16, 1921 D. Simajiq Patented 3, .1926.

umTEo-esrArs vmnmm 1). Simmons,

or cnrcaeo, minors.

- nrnnarus nor. am: mh'fiuracrunn or rerun.

ippfication and September 16, 1921. Serial 110. 501,113.

This invention relates to an improved process and apparatus for themanufacture of paper and its purpose is to provide means Y for increasing the speed and. efficiency of paper manufacturing operations.

An important object of the invention is to provide means for causing pulp stock to flow positively in an angular path adjacent-to the mold on which the'paper 'web is formed. A further object is to provide an apparatus of the cylindrical type carrying an endless wire belt and "comprising means for moving the pulp stock positively in the same direction that the wire belt travels. Still another object is to provide a simultaneous movement of the paper mold and pulp stock together with means for regulating the relative speeds of these movements. further object is to provide a movable paper mold in combination with means independent of the pulp and stock supply for eifecting allocal circulation of the pulp stock through the mold containing vessel-or vat. Other objects relate to various features of constructionand arrangement whieh will appear more fully hereinafter. T

The natfiire' of the invention will be understeed from the following specification taken w th the accompanying drawings in which one embodiment is illustrated.

..In the drawings- Fi'gure 1 shows a side elevation of the' apparatus; v Fig. 2 shows n end elevation of the ,a paratus,. parts of the interior constructron illustrated by dotted lines. The invention comprises a vessel 10 having side walls 11 and a lower wall 12. A portion of the lower wall 12 is semicylin drical in contour and the sidesthereof ex- 1 .tend upwardly withinthe vessel to form weirs 13 and 14 over which the plu adapted to pass during .itsftravel t rou the apparatus. .'At the inl t' end of t e vessel 10, the side walls are b an end wall' 15 havin an inlet pipe 16" cad ing therethrough or supplym thefpulp stock to. the"vessel. Opposite t e wall 15,

another wall 17 extends upwardly into the vessel to form a weir over which the. .pulp

flows. and this wall extends downwardly beneath the lowergwall 12'parallelto the wall 15 to form an inlet passage 18 thro h which the pulp flows upwardly overt e r weirs 13 and 17, thus compelling the pulp weir 17. A transverse wall' 19 extends downwardly from the top of the vessel between the side walls 11 and terminates above the lower wall 12 in the space between the to pass through an irregular path from the region adjacent the inlet conduit 16. At the dischargeside of the machine the pulp flows over the weir 14 into a discharge channel which is formed between the side walls 11 by the end wall 21 and the parallel vertical wall 22 which -extends downwardly from the weir i i. The discharge channel 23, thus formed, communicates through a oonnectingtpipe 24 and an elbow 25 with the centrifugal ump 26. This pump is connected .on its fie rge side by pipe 27 and an elbow28 tli he channel, 18 which communicates. with the inlet side of the tank 1( The pump 26 7 thus operates to efi'ect a local circulation of the pulp through the tank independently of the supply of pulp through the pipe 16.

p? In the region above the semicylindri'cal lower wall 12 there'is mounted a cylindrical mold 30 having a cylindrical wallmounted on end brackets 31 provided with trunnions 32 which are journalled in bearings-carr'ied by the side walls 11.. A woven wire mold33 extends around the cylinder 30 which rotates in the direction indicated by the arrow 34. This mold 33 passes over a roll 35 and turns over a series' of table rolls 36. After passing over the table rolls,.

the wire mold passes over a-series of suction boxes 37 and then between twi couch rolls 38. After passing around the lower couch" roll the wire belt 33 is carried back to the I cylindrical mold 30, being supported by a series of rolls 39. I f'The pulp stock fo use in the vessel 10 v 'is preferably formed by mixing about 5% of fibrous material with 95% water, thus form- 'ing a fluid pulp stock adapted to flow freely. This pulp stock which is introducedint0 the tank 10 through the pipe 16 flows through the irregular passage. formed by the weirs 13 and 17' and the baflle wall 19 into the s ace adjacent to the mold 30. The

I level of the pulp stock'bn the inlet sideof I themold member is above that on the disp charge. side and the liquid of the pulp stock flows through the perforated belt 33 into the interior of the cylindrical mold from.

which-it is drawn ofi by pipe 40. The water regulation of the return of flow of the water from the interior of the cylindrical member; By regulating this valve the head of the water can be maintained within the c lindrical member below the level of the pu p stock in the vessel. The passage of the liquid portion of the pulp into the interior of the mold causes the fibrousportion to adhere to thebelt', thus forming a la er or 'web of paper stock which is forme continuously on the. belt and carried around with it. The "centrifugal pum 26 causes a local circulation of pulp throng the tank 10 so that the pulp .moves in an angular path in the same direction that the belt 33 moves, thus facilitating the formation of the la er 'var ing the speed of the centrifugal and of pulp stock or paper web on'the belt. y ump the speed of rotation of the cylin rical mold, it is possible to secure any desired effect in the formation of the paper web.

The irre larpaththrough which the pulp is compe led to flow by the arrangement of the weirs 13 and 17 and the baflie wall 19 secures an even mixture of the stock and water and an even flow of the mixture over the weir 13 in the region adjacent the mold. The web which is formed whilethe belt is passing through the stock in the tank has considerable moisture removed therefrom by the table rolls and suction boxes before it passes throu h the couch rolls and presses.

Although have shown and described one formof the invention for pu oses'of illustration, itwill be understood t at it may be constructed in various other ways without departing from the scope of the appended claims. I

I claim: 1. In apparatus of the class described, vessel for containing fluid pulp stock, a mold mounted in said vessel, a pair of conduits leading to and from said vessel, means forcausing said ulp stock to flow from said vessel through one of said conduits and back through said vessel to the other of said condults, and means for-causing the pulp stock to follow an irregular zigzag path before it reaches said mold.

2. In apparatus of theclas's described, a'

vessel for containing fluid pulp stock, a mold mounted in said vessel, a palrof conduits leading to and from said vessel, means for causing said pulp stock to flow from said vessel through one of said conduits and back to said vessel through the other of said conduits, a pair of weirs mounted between said last' named conduits, and a battle wall mounted between said weirs.

3. In apparatus of the class described, a vessel'for containing fluid pulp stock, a mold mounted in said vessel, a'pair of conduits leading to and from said vessel, means for causing said pulp stock 'to flow from said vessel through one of said conduits and back to said vessel through the other of said conduits, a pair of weirs mounted between said last named conduits, and a baflle wall mounted between said weirs, said ballie wall terminating above the lower wall of said vessel.

. 4. In apparatus of the class described, a vessel for containing fluid pulp stock, said vessel having an overflow 1i on one side thereof, means for supplying uid pulp stock to said vessel, means for withdrawing the pulp stock discharge over said overflow lip and returning the same to said vessel at. the other side thereof, means for causing'said pulp to flow through an irr lar zigzag passage at the said other side 0 said vessel,

and a mold mounted in said vessel between the sides thereof.

5. In apparatus of the class described, a vessel for containing fluid pulp stock, a cylindrical support mounted in said vessel, means for rotating said support, means for causing a positive movement of said pulp stock adjacent said support in the same direction in which the pzrl ifphery of said sup-. port moves, an endless p orated mold passing around said support and extending upwardly out of said vessel, a series of table rolls over which said mold passes, a suction box engagin said mold for removing moisture from t e pulp thereon, and a pair of couch rolls engaging said mold.

In testimony. whereof, I have'subscribed my name.

. VENNING D. SIMONS.

Images