US 2384912 A
Description (OCR text may contain errors)
Sept. 18,1945. F. A. HELIN 2,384,912
- STOCK INLET Filed May 8, 1943 7 Sheets-Sheet 2 217E 52 ZZUZ Sept. 18, 1945; F. A. HELIN I 2 43 STOCK INLET Filed lay a, 1943 I Sheets-sh ep;
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Sept-r18; 1945. F. A. HELIN 2,384,912
-STOCK INLET I Filed May 8, 1943 7 Sheets-Sheet 5 Sept. 18, 1945. F. A. HELIN STOCK INLET Filed May 8, 1943 '7 Sheets-Shet 6 m w u Patented Sept. 18, 1945 STOCK INLET Francis A. Helin, Watertown, N. Y., aslilnor to The Bagley and Sewall Company, Watertown, N. Y., a corporation of New York Application May 8, 1943, Serial No. 486,203
This invention relates to stock inlets for paper making machines characterized by simplicity, compactness and maintenance of continual flow of stock from the time it leaves the stock chest or reservoir until it is deposited on the forming surface of the paper making machine.
More specifically the invention relates to a stockinlet having a stock spreader chamber receiving stock directly from a delivery pipe and spreading it across the width of apaper making machine together with an inlet chamber extending across the width of the forming surface of a paper machine and receiving stock in controlled amounts from the spreader chamber.
In accordance with this invention, a stock spreader chamber composed of a closed ended pipe is horizontally mounted across the width of a Fourdrinier type paper making machine immediately in advance of the breast roll end of such a machine. The pipe is mounted on upright pedestals or end frames.
A stock delivery pipe connects the conventional stock chest or reservoir with the central portion of the horizontally mounted pipe. A stock return pipe is also provided for returning excess amounts of stock back to the stock chest. A bypass valve is interposed between the horizontal pipe, the stock delivery pipe, and the stock return pipe to divert the flow of paper stock back to the stock chest.
The horizontal pipe is connected through laterally extending valved pipes spaced along the length thereof with an inlet chamber. This inlet chamber is composed of a second horizontal closed ended pipe suspended from the end frames over the upperdun of the forming wire of the paper machine. This second pipe has a 'slot therethrough along the length thereof. A nozzle projects from this second pipe and providesa passageway for stock discharged through theslot in the pipe. The nozzle preferably has an adjustable or flexible upper lip to control the velocity and uniformity of stock delivery to the forming wire.
If desired a flow evener roll can be rotatably mounted in the second horizontal pipe immediately in front of the slot to break up fiber bundles and to prevent formation of eddy currents in the stock.
The end frames supporting the inlet of this invention are preferably equipped with cylindrical chambers slidably receiving pistons acting on the parts normally-supported by the frame. Fluid under pressure can be introduced into these cylindrical chambers for raising the pistons and 55 A ian further object Ofthe inventionisto prO- thereby lifting the horizontal pipes relative to the paper machine forming wire. This will facilitate changing of the forming wire. Pipe connections with the horizontal pipes that are not raised with the horizontal pipes can be equipped with quick disconnect coupling devices.
A feature of the invention includes an equalizer shaft connected through cranks and levers with the end portions of the inlet chamber. This equalizer shaft prevents one piston from working ahead of the other piston when raising or lowering the structure since, in such event, the shaft will be subjected to a torsional twist and will effectively resist unequal movements of the pistons.
It is, then, an object of this invention to provide a, compact light weight stock inlet for paper making machines which distributes stock uniformly across the width of the machine without permitting the formation of quiescent stock areas.
A further object of the invention is to provide a. stock inlet having a stock spreader chamber for spreading stock from a delivery pipe across the width of a paper machine together with a stock inlet chamber disposed across the width of the forming surface of a paper machine and receiving stock from the spreader chamber uniformly along its length through a plurality of valved passages connecting the two chambers and controllable for even distribution of stock from the spreader chamber uniformly along the length of the inlet chamber.
A still further object of the invention is to provide a stock inlet with a fluid pressure actuated lift for raising the inlet to facilitate the changing of a forming wire on a paper machine.
A still further object of the invention is to provide a stock inlet wherein stock is continually vide a self-draining stock inlet eliminating wastage of stock.
A still further object of the invention is to provide an improved by-pass valve construction for stock flow control.
Another object of the invention is to provide a hydraulic lift for a stock inlet wherein the movements of the pistons are held in synchronized relation through an equalizer shaft.
along its entire length by a master control mechanism and having a plurality of individually onerated toggle-controls for flexing localized increments of the lip.
A general object of the invention is to provide a stock inlet having readily operated and easily accessible controls and composed of light-weight parts in compact relationship.
Other and further objects of the invention will be apparent to those skilled in the art from the following detailed description of the annexed sheets of drawings which illustrate preferred embodiments oi the invention by way of example only.
n the drawings:
Figure 1 is a somewhat in s.
: tic trad mentary and broken side elevational view, wi parts in'vertical cross section, oil a stock inlet according to this invention illustrating o he used on a i illustrat= ner in which the inlet is adapted to Fourdrinier type paper ma 1-1-1:
Figure 2 is a view similar to Figure ing another arrangement of the stock 1;; invention relative to the paper mag ma and associated stock reservoirs.
Figure 3 is a rear side elevational view of the stock inlet according to this invention.
Figure 4 is a top plan view of the stock inlet according tothis invention and also illustrating the relationship of the inlet relative to the torming wire of a paper making machine. r
Figure 5 is a vertical cross-sectional view with parts in elevation, taken along the line if-V of Figure 4.
Figure 6 is a view similar .to Figure 5 illustmt ing the inlet in raised position to facilitate c 1 ing of the 0 wire of the paper machine.
Figure 7 is a vertical cross-sectional view, with parts in elevation, taken along the line vn of Figured and illustrating one of the gate valves controlling flow from the stock spreader chamber to the stock inlet chamber.
Figure 8 is a horizontal cross-sectional view, with parts in elevation, taken along the line VIII-V111 of Figure 3.
Figure 9 is an end elevational detail view ta along the line E-fi oi 4..
Figure 10 is a vertical cross-sectional view, with parts in elevation, taken'along theline X-X of Figure 3.
Figure 11 is a horizontal crow-sectional view taken along the line m--- of Figure in. e
As shown on the drawings:
As shown in Figures 1 to e inclusive, the ref-i=- erence numeral it designates generally the stash inlet of this invention. The steel: inlet it, in the arrangement of Figure 1, receives stools from a delivery pipe ii extending through the doc F on which the inlet is is mounted. from the inlet it is returned through a i: us turn pipe 82. The inlet it is ted on the flooring F immediately in advance of the bree. roll it of a Foer type paper at. nus. chine. As is conventional in such nieces a forming wire idis trained around the breast and has an upper run provi a paper ior surface receiving stock from the inlet.
In the arrangement of e i a is chest it is mounted at a level beneath the paper :a a chine inlet it as, for pie, in the beset. A pump it propels stock irom the chest 85 through the delivery pipe ii to the t. The
Stock return p pe is discharges back to the r chest l5. As will be hereinafter. mo e fully d 2,884,913 vide a flexible lip for a stock inlet controlled scribed, whenever the pump it is stopped, all of the stock in the inlet III will be drained back through the delivery pipe II to the chest iii. In this arrangement, therefore, the inlet is selfdraining and wastage of stock in the inlet whenever a shut-down occurs is eliminated.
In the arrangement of Figure 2 the stock chest I5 is mounted at a level beneathmhe inlet it as in Figure 1, but the pump it, instead of propelling stock direct to the delivery pipe Ii, forces the stock through a pipe ll into a screen trough did i8 mounted at a level above the inlet it. Stock from the trough i8 then flows by gravity downwardly through the delivery pipe it. to the inlet it.
In both Figures 1 and 2 the amount of stool; delivered to the inlet is regulated by the speed of the pump it. In the arrangement of Figure l the pressure of the stock in the inlet is controlled by the speed of the pump, while in the arrangement oi Figure 2 the pressure of the stock in the inlet is controlled by the hydraulic head of stock above the inlet.- In the arrangement of Figure l the chest 65 preferably receives screened pulp, whereas, in the arrangement of Figure 2, the chest 55 can receive unscreened stock and the trough it will screen the stock before it is do livered to the inlet l0.
Theinlet in has a bypass valve indicated generally by the reference numeral is associated therewith interposed between the inlet, the stool: delivery pipe i i' and stock return pipe is for the purpose of diverting stock from the pipe ii to the pipe 62. In the arrangement of Figure 1 this valve i t is used in vertical position, whereas, in the arrangement of Figure 2 the valve 09 is used in horizontal position.
The valve includes, in the arrangement of Figures l, 3 to 6, and 8, an open ended cylindrical casing 2d mounted vertically and having the bottom open end joined to the stock delivery pipe ii and the top open end detachably connected to the intake pipe 2i of the inlet it through swing bolts 22. The casing 2t also has a side opening 23 communicating through an elbow pipe 26 with the stock return pipe 62. I
An open ended cylindrical sleeve 25 is rotatably mounted in the casing 20 and has the in= terior thereof freely communicating with the open ends of the casing. This sleeve 2i; has an intermediate cut-out portion 25 in the side wall thereof adapted to be placed into and out oi communication with the opening 23 of the casing for diverting stock in regulated amounts from the pipe ii to the pipe it.
The sleeve 25 has a ring gear Zisecured therearound adjacent the upper end thereof to provide a ring of teeth meshing with a worm 28, as best shown in Figure 8, on a shaft 29 rotatably carried in the casing 2t and projecting outwardly from the casing. A readily accessible hand wheel 88 is mounted on the shaft as to rotate the sleeve til-and. thereby control the position oi the cut= out portion 25 thereof relative to the outlet 28. Obviously, of course, the teeth it could be formed integrally with the sleeve 25.
By control of the position of the cut-out por= tion as oi the sleeve, a continual flow of steels be maintained through the delivery pipe ii evmi though the inlet in will not accommodate back through the return pipe E2 to the chest 05.
A continual circulation and recirculation of stock can thus be maintained. Whenever a shut= down occurs, the stock in the inlet ll automatiassure In the valve 13 of Figure 2 a somewhat diflerent casing 3! is used. This casing II is a horizontal cylinder with a closed end wall 32 at one end thereof and an open end communicating with the stock delivery pipe II. An outlet 33 is provided in the casing 3| at the bottom thereof communicating with the stock return pipe l2 and a second outlet 34 is provided in the top of the casing communicating with the intake 2| of the inlet I0. Y
A cylindrical sleeve 35 is rotatably mounted in the casing 3| and has the gear teeth 21'thereon the same as the sleeve 25.; However, the sleeve 35 only has an open end 36 communicating with the delivery pipe II and a curved closed end 31 for directing stock to the cut-out portion 38 in the side wall thereof. This cut-out portion 38 l can communicate with either the outlet 33 or the outlet 34 and thereby stock from the delivery pipe II can be diverted from the intake 2| to the return pipe I2.
The inlet It includes a stock spreader chamber composed of a horizontal closed ended pipe 40 carrying the intake 2| on the bottom thereof midway between the closed ends thereof. The pipe 40 is equipped with mounting pads 4i near the ends thereof and depending from the bottom thereof.
Brackets 42 are carried by the pipe 40 and project forwardly therefrom toward and preferably over the breast roll I3 of the paper machine. Platform carrying pads 43 are provided on the'top of the pipe 40.
The function of the pipe is to receive the stock from the intake 2! and spread it across the width of the pap r machine forming wire 14. The
pipe 40 also forms the principal supporting Or carrying member for most of the component parts of the inlet l0.
An outlet 44 is formed on top of the pipe 40 above the intake 2| and discharges through a gate valve casing 45 into an elbow pipe 48 carrying a vertical pipe 41 which is detachably connected through swing bolts 48 with an inlet connection 49 of the elbow 24. As shown in Figure 1, the
casing 45 slidably mounts a gate valve 45a which can be raisedand lowered by means of a hand spaced intervals along the length thereof. Six
such pipes 50 are shown, but any number can be used in accordance with thislnvention depending upon the length of the pipe 40. Each of these outlet pipes 50 discharge through a gate valve casing 5!. As shown in Figure 7, each gate valve casing 5i slidably' supports a gate valve 5la with a cut-out bottom section lib so that the valve can never be completely closed. A hand wheel 5|c controls the position of each gate valve 5la.
A stock inlet chamber provided by a second horizontal closed ended pipe 52 has resting pads 53 extending from the bottom thereof mounted on top of the brackets 42. Inlet pipes 54 protect lateral y rearward from the bottom portion of the pipe 52 and are each secured to a valve casing 5|. Stock from the pipe 40 flows out of the top of this pipe laterally forward into the bottom of the pipe 52 and regulation of the valves 5m can be effected to uniformly distribute stock from the pipe 40 along the entire length of the pipe 52.
As shown in Figures 3 and 4, the pipe 52 has the ends thereof closed by end plates or caps 55.
As shown in Figures 1, 2, 5 and 6, a horizontal slot 56 is out in the forward face of the pipe 52 near the bottom thereof. This slot 53 extends for the full length of the pipe 52 between the end plates 55. x
A flow evener rollcomposed of a reticular tube 51 is mounted in the pipe 52 in front of the slot 55 on axles 58 which are rotatably supported in bearing supports provided by the end plates 55. As shown in Figures 3 and 4 an axle portion 53 projects beyond an end cap 55 and is coupled to the drive shaft 59 of a gear box 50 carried on a bracket 5| by the end plate 55. This gear unit can" be driven to rotate the tube 51. The tube will break up fiber bundles and prevent undesirable eddy currents of stock in the pipe 52.
Baflies 62, asshown in Figures 4 to 6, extend upwardly from the bottom of the pipe 52 in front of each inlet pipe 54 to prevent streams of stock from the pipes 54 from flowing directly through the slot 58.
The inlet chamber provided by the pipe 52 is operative to further spread the flow of stock from the pipes 50 across the full width of the forming wire I4 and to kill any eddy currents of stock as well as to keep all of the stock continually in motion.
An inlet nozzle directs stock from the slot 53 onto the upper run of the forming wire [4 and is composed of a fixed lower lip 63 attached to the pipe 52 and extending from the lower edge of the slot 56 downwardly and forwardly to the upper run of the forming wire H as best shown in Figures 5 and 6. A fixed upper lip 54 is attached to the pipe 52 and extends forwardly and downwardly from the upper edge of the slot 56.
A plurality of upstanding ribs 35 are formedat spaced intervals on the lip 54 and each of these ribs has a pivot 66 supporting a crank 01- lever 31 intermediate the ends of the lever.
The lower ends of the levers 51 are pivotaily connected through brackets 58 to an adjustable upper lip portion 69 which is connected to the upper lip portion 54 by means of a flexible strip The upper ends of the levers 31 are pivotally connected to trunnion blocks 1| each positioned between a pair of hand wheels 12, threaded on a rod 13. Each rod 13 is pivoted to an ear or lever 14 on a shaft 15 which is rotatably carried in bearing blocks 15 on the pipe 52. e
As shown in Figure 4, a large number of threaded rods 13, hand wheels 12 and lever-operating trunnion blocks 1| are provided in closely spaced relation along the entire length of the pipe 52. The shaft 15 projects beyond the end a can have indlcia thereon cooperating with a pointer P on the end plate 85 indicating the position of the shaft 18 and thus indicating the nozzle opening.
Rotation of the hand wheel M will, of course, rotate the shaft 15 to move all of the rods 13 andthereby simultaneously tilt all of the levers or cranks 61 for raising or lowering the lip section 88. The discharge orifice of the nozzle is thus conveniently controlled from a single point. The hand wheels I2 can be individually manipulated to slide the trunnion blocks" on their rods 13 to control the positions of increments of the lip section 88 along the length thereof. The position of the inlet nozzle is thus controlled along its entire length by a single means and is selectively controlled at closely spaced intervals along its length by manipulation of individual hand wheels 12.-
A standpipe 82 open at the to thereof ex tends from the top of the pipe 52 preferably near one end thereof and serves as an air vent for the inlet chamber. The pipe can be transparent to are also formed on the pipe 52 and carry a second vertical railing 81. The railings 85 and 81 are connected at one end of the inlet by a railing The walk 8| is thus surrounded by a railing.
ing the pistons and lifting the entire inlet as shown in Figure 6. The equalizer shaft 86 prevents one piston 82 from working ahead of the other piston since such operation 'will tend to tilt the pipe 48 thereby subjecting the shaft 86 to torsion. The shaft 96, together with its links and cranks, thus ties both pistons together for uniform movement.
Upon completion of the wire change the hy draulic pressure is relieved and the pistons will drop by gravity toward the bottoms of their wells thereby again seating the intake pipe 2| on the valve casing 20 and also seating the pipe 4'! on the pipe 48. The swing bolts are then moved to the position shown in Figure 5 and the unit is again ready for operation.
As shown in Figures 5 and 6, a white water defiector llll is provided under the upper run of the forming wire it immediately adjacent the breast roll 13. This deflector guides white water from the upper run of the wire and prevents the same from splashing on the breast roll, .A plurality of wire supporting bars I02 are carried by the deflector in spaced parallel relation to carry the upper run of the wire between the breast roll l8 and the first table roll I03. These =bars I02 A ladder 88 supported by the side rails 88 extends downwardly from the end of the walk 8| opposite the railing 88 endthereof. This ladder gives convenient access from the floor level to the walk 84.
An operator can readily reach all of the controls such as the hand wheels 8i, ilc, b, and H from the walk or ladder. The hand wheel 80 is conveniently reached from the floor level.
As best shown in Figure 3, the mounting. pads M of the inlet are supported on end frames or stands 80.
As best shown in Figures 10 and 11 each stand "80 has a central cylindricalwell 8| slidably receiving a piston 82 acting at its upper end on the pad ll. The cylindrical well 8| has a some-' what' enlarged closed bottomed chamber 83 adapted to receive fluid under pressure from an inlet'8l. Fluid introduced into thischamber 88 will act on the end of the piston 82 to raise the same in the well 8|.
Each stand 88 has a bearing bracket 85 secured thereon and rotatably supporting an equalizer shaft 88.' Cranks 81 are secured to the equalizer shaft 88 adjacent each stand 88 and the ends of these cranks 81 are pivoted to links 88. The links ,88 in turn are pivotally connected to brackets 88 secured on the pipe 48.
When it is desired to raise the entire inlet II for the purpose of changing the forming wire ll of the paper machine, the swing bolts 22 and 48 are loosened and swung to out of the way positions as shown in Figure 6. Nuts. I88 (Fig. 10) connecting the pads ll with the stands 88 are removed, and the chambers 88 in the stands are subjected to fluid pressure such as hydraulic pressure for acting on the pistons 82 thereby rolemaking machine comprising spaced opposed end' and the walls I04 of the deflector. on which they arecarried have beveled or undercut front edges I05 so that .white water will, not pile up under the wire adjacent these edges thereby increasing the drainage capacity of the water deflector.
From the above descriptions it will be understood that the inlets of this invention are supported on end frames or stands and are equipped with fluid pressure raising devices. The inlets have stock spreader chambers with central intakes which are detachably coupled to :by-pass valve casings. The by-pass valves divertstock from a delivery pipe back to a storage reservoir thereby making possible a continual circulation of stock. The spreader chambers of the inlets can also be equipped .with :by-pass return passages for very accurate regulation of stock delivery from the inlet.
The spreader chamber discharges at intervals along its length into an inlet chamber which is mounted above the breast roll end of a Fourdrinier type paper making machine and which discharges along its entire length onto the upper run of the forming wire of such a machine. A readily controlled nozzle extends from the inlet chamber to direct the stock onto the wire.
Flow of stock from the spreader chamber to the inlet chamber can be carefully regulated and controlled by means of a plurality of gate valves so that the stock is uniformly distributed across the enia're'width of the paper machine.
It will, of course, be understood that various details of construction may be varied through a wide range without departing from the'principles of this invention and it is, therefore, not the purpose to limit the patent granted hereon otherwise than necessitated by the scope of the appended claims.
I claim as my invention:
1. A stock inlet for a Fourdrinier type Paper frames adapted to be mounted immediately in advancelof the breast roll end of a Fourdrinier paper making machine, a first substantially horizontal stock conduit supported on said frames, a substantially vertical intake pipe communicating with the central bottom portion of said first conduit, a stock feed pipe, a stock discharge pipe, a valve casing between said pipes and said intake connecting said overflow pipe with said discharge pipe, a second substantially horizontal conduit supported by said frames, a plurality of valved connecting pipes spaced along the lengths of the first and second conduits and joining said conduits, a nozzle projecting from said second conduit having a discharge end over the breast roll end oi the paper machine, said nozzle communicating with said second horizontal conduit along the length thereof, an adjustable upper lip on said nozzle, means for moving said upper lip along the entire length thereof, means interposed between said moving -means and said lip for raising and lowering increments of said lip along the length thereof, and a hydraulic lift for raising and lowering the conduits relative to said end frames.
2., In a Fourdrinier type paper making machin having a forming wire trained around a breast roll to provide a web-forming surface along the upper run thereof, a stock inlet which comprises a first pipe, means mounting said pipe horizon! adapted to connect said stock delivery pipe with ing stock from said intake pipe, means defining a stock inlet chamber having a discharge orifice along the length thereof, and a plurality of valved passages connecting said stock spreader chamber and said inlet chamber for uniform distribution of stock from the spreader chamber along the length of the inlet chamber.
5. A stock ,inlet for a paper making machine comprising a first closed ended pipe having a depending central intake, a valve casing detachably connected to said intake, 9, stock delivery pipe communicating with said casing, a stock return pipe communicating with said casing, a valve in said casing connecting said delivery pipe with said intake and adapted to selectively connect said stock delivery pipe with said stock return pipe, a plurality of valved pipes extending laterally along the length of-said first pipe, a second pipe in spaced parallel relation with said first pipe communicating along its length with said valved I pipes, said second pipe being at a higher level tally across the width of said machine in advance of the breast roll thereof, means for feeding stock to the central portion of said first pipe, a second pipe, means mounting said second pipe horizontally across the width of said machine above the web-forming surface thereof, said second pipe having an outlet along the length thereof for discharging stock onto the forming surface across the width thereof, and a plurality of valved conduits connecting said first and second pipes for uniformly distributing stock from the first pipe along the length of the second pipe.
3. Stock delivery apparatus for a paper making machine comprising a stock chest, a stock delivery pipe extending upwardly from said chest, a pump for propelling stock from said chest .through said delivery pipe, a valve casing havin an open ended valve sleeve receiving stock from said delivery pipe, said sleeve having a cut-out portion in the side wall thereof, a stock return pipe extending downwardly from said valve casing to said stock chest, means for rotating said sleeve to divert stock from the delivery pipe to said return pipe, an intake pipe receiving stock from the upper end of said sleeve, means defining a stock spreading chamber communicating with said intake pipe, means .deflning a stock inlet chamber having an elongated discharge orifice, and valved conduits connecting said spreader chamber with said inlet chamber to uniformly distribute stock from the spreader chamber along the length of said inlet chamber, said inlet chamher and said spreader chamber being arranged for automatic gravity drainage through said valve sleeve and said delivery pipe into said stock chest whenever said pump is inoperative. I
4. Stock delivery apparatus for a paper making machine comprising a stock chest, an elevated stock reservoir, means for pumping stock from said chest to said elevated reservoir, a valve casthan said first pipe for gravity drainage into the first pipe, a discharge nozzle communicating withv 6. A stock inlet for a paper making machine comprising an elongated closed ended .pipe, mounting pads depending from said pipe, a stock intake conduit depending from said pipe, brackets extending laterally from said pipe, stands supporting said mounting pads to hold said pipe in horizontal position, lifting devices interposed between said stands and said mounting pads; for raising said pipe, 9. second pipe mounted on said brackets, and valved conduits connecting said firstand second pipes, said second pipe having an elongated discharge orifice along the length thereof whereby stock supplied through said intake will be spread in said first mentioned pipe to flow through said valved conduits in regulated amounts for uniform distribution to said second pipe and subsequent ejection from said second pipe along the length thereof. I
'7. In a stock inlet a conduit pipe adapted to extend transversely across the width of a Fourdrinie type paper making machine, a nozzle extending from said pipe having a fixed lower lip, a fixed upper lip section and a movable upper lip section hingedly connected to said fixed upper lip section, levers pivoted intermediate their ends to ing, a sleeve rotatably mounted in said valve cassaid fixed upper lip section, means pivotally connecting the lower ends of said levers to said movable lip section, a shaft extending along the length of said pipe, means on said pipe rotatably mounting said shaft, leverson said shaft, threaded rods pivoted to said levers, trunnion blocks slidably mounted on said rods, each of said trunnion blocks being pivoted to the upper end of a lever, hand wheels threaded on each rod for shifting said trunnion blocks, and means for rotating said shaft whereby said movable lipsection can be simultaneously raised and lowered along the entire length thereof by rotation 'of said shaft and whereby selected increments along the length of I said movable lip section can be raised or lowered independently of other increments of the lip section by manipulation of said hand wheels.
8. In a stock inlet for a paper making machine a pair of end frames each having a well portion, a piston slidably mounted in each well portion. a stock inlet mounted on said pistons, a shaft rotatably supported on said end frames, cranks secured to said shaft, links connecting said cranks with saidstock inlet, and means for introducing fluid under pressure to said wells under said pistons for raising said inlet, said shaft being twisted whenever one of said pistons works ahead of the other of said pistons to hold the pistons at the same level and thereby prevent tilting of the inlet.
9. A stock inlet for a paper making machine comprising a first horizontal pipe providing a stock spreading chamber, end frames supporting said pipe, a second horizontal pipe providing a stock inlet chamber, valved conduits connecting said first and second pipes, brackets carrying said second pipe from said first pipe, and hydraulic lift devices interposed between said end frames and said first-pipe for raising and lowering the pipes and conduits.
10. In a stock inlet for a paper machine comprising a stock intake pipe, a stock delivery pipe, a stock return pipe, a. valve casing connected to all of said pipes, a rotatable valve sleeve in said casing connecting said stock delivery and intake pipes, said sleeve having an opening in the side wall thereof, and means for rotating said sleeve to place said opening into and out of communication with the stock return pipe.
11. A stock inlet for a paper making machine, frames supporting said inlet, a piston slidable in each frame to raise the inlet above the frames, a shaft rotatably mounted on said frames, and spaced means connecting said inlet and shaft to rotate the shaft whenever the inlet is raised and lowered to twist the shaft whenever one piston works ahead of another piston.
. 12. A stock inlet for a Fourdrinier type paper making machine having a forming wire providing a web-forming surface which comprises, first and second horizontal stock conduit pipes adapted to extend transversely across the width of the form'- ing wire, a feed pipe communicating with the first conduit pipe, said second conduit pipe having a slot outlet along the length thereof, a nozzle connecting said slot outlet with the forming surface provided by the forming wire, means spaced along 7 the lengths of the conduitpipes connecting the conduit pipes in fluid flow relation; flow control devices cooperating with said means to regu late amounts of fluid flowing through said means, and an individual adjusting mechanism for each device adapted to position the device for distribution of stock from the first conduit pipe uniformly along the length of the second conduit pipe to be elected through the nozzle directly onto the forming surface of said forming wire.
13. In a stock conduit for a paper making machine having a forming surface, a first horizontal pipe arranged to extend transversely across the width of a paper making machine for defining a stock-spreading chamber, a second horizontal pipe in spaced lateral relation with said first pipe ata level slightly above the level of the first pipe but with the lower portion thereof overlapping the upper portion of the first pipe, said second pipe having a discharge nozzle along the length thereof arranged for directly discharging stock onto the forming surface of the paper making machine,
and valved horizontal conduits connecting the top portion of the first pipe with the bottom portion of the second pipe at spaced intervals along the lengths thereof whereby stock introduced into the first pipe is spread across the width of the paper making machine and then distributeduniformly along the length of the second pipe for election through the nozzle directly onto the forming surface of the paper making machine with the second pipe providing a chamber above the level of the forming surface to insure flow of stock onto the forming surface. 7
14. In a stock inlet fora paper making machine, a stock distributing pipe arranged to extend transversely across. thewidth of the paper making machine, a control valve comprising an open-ended casing having one end communicating with said stock distributing pipe, an openended sleeve rotatably mounted in said casing and accommodating flow of stock therethrough, said casing. having an opening in the side wall thereof, said sleeve having a out-out portion in the side wall arranged to register with said opening in the casing, and means for rotating said sleeve to selectively position the out-out portion thereof relative to said opening.
FRANCIS A. HELIN.