US2737087A - Headbox for paper machine - Google Patents

Headbox for paper machine Download PDF

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Publication number
US2737087A
US2737087A US157869A US15786950A US2737087A US 2737087 A US2737087 A US 2737087A US 157869 A US157869 A US 157869A US 15786950 A US15786950 A US 15786950A US 2737087 A US2737087 A US 2737087A
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Prior art keywords
stock
flow
pipes
channel
headbox
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Expired - Lifetime
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US157869A
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English (en)
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Weston T Bennett
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International Paper Canada Inc
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International Paper Canada Inc
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Publication date
Application filed by International Paper Canada Inc filed Critical International Paper Canada Inc
Priority to US157869A priority Critical patent/US2737087A/en
Priority to GB23053/50A priority patent/GB683983A/en
Priority to FR1030612D priority patent/FR1030612A/fr
Priority to AT183642D priority patent/AT183642B/de
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Publication of US2737087A publication Critical patent/US2737087A/en
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    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/02—Head boxes of Fourdrinier machines
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/02—Head boxes of Fourdrinier machines
    • D21F1/026—Details of the turbulence section

Definitions

  • This invention relates to new and useful improvements in 'a. method of and apparatus for flowing an aqueous wo'odpulp suspension onto the wire of a high speed papermaking machine and particularly seeks to provide a novel method of physically conditioning the pulp suspension so that it will be deposited on the wire of a paper machine under the most advantageous conditions of flow and novel apparatus by which such physical conditioning of the pulp suspension can be effected.
  • An object of this invention is to provide a novel method of physically conditioning the flow of woodpulp in aqueous suspension through the headbox of a paperma'king machine whereby the stock as it approaches the slice will have its suspended fibres substantially in fixed relation with respect to one another throughout the major cross-sectional area of the flowing stream.
  • Another object of this invention is to provide a method of the character stated in which the stock suspension is progressively converted from a condition of turbulent flow to a condition of substantially frozen flow, which latter condition is achieved prior to the time at which the stock is projected through the slice.
  • a further object of this invention is to provide a method of the character stated in which any substantial amount of flocculation which may occur in the stock simultaneously with the establishmentof frozen flow conditi'ons may be broken up without disrupting the improved .stock formation as the suspension passes through the slice.
  • a further object of this invention is to provide apparatus comprising a headbox for high speed paper machines so designed that theflow conditions of a woodpulp stock suspension entering it will be progressivelyconvertedfrom turbulent fiow to frozen flow prior, to the moment at which such stock is projected through the slice.
  • 4 I H v A further object of this invention is top rovide apparatus of the character stated whichincludes a plurality of distribution pipes extending into opencomrnunication with a receiving chamber formed in theinlet portion of a flow box of generally rectangular cross -section and being provided adjacent the receivingchamber with a plurality of closely packed tubes sealed together in such a manner that all of the stock suspension must pass through the tubes.
  • a further object of this invention is to provide apparatus of the character stated in which an adjustable slice is provided at the discharge 'end ofth straight channel portion elfecting the smoothly controlled projection or thestock onto the wire of the papermaking machine.
  • V Fig. l is a side elevation, partly in section, of a headbox constructed in accordance with this invention.
  • Fig. 2 is a transverse section taken along line 22' of Fig. 3 is a transverse section taken along line 3 3 of Fig. 4"is a top plan viewof theheadbox; J I V, a
  • Fig. 5 is an enlarg d detailed transverse section taken along line 5 5 of Fig.1 and more 'clearly shows the exact arra'ngernentof the tubes; w 1
  • Fig. 6 is an enlarged detailed longitudinal section taken along line 6-6 of Fig. and shows the exact manner of installation of the orfice plates at the intake ends of the tubes;
  • Fig. 7 is a horizontal detailed section taken along line 7-7 of Fig. 1;
  • Fig. 8 is a perspective viewpfadefloccing roll which may be employed in connection with the instant form of headbox.
  • M NH In dealing with water and other similar homogeneous fluids it is well known that the flow in a long, straight pipe or other similar channel of uniform ress-s: rdnsrarea may be either turbulent or streamline, depending chidfly on the velocity of flow, the cross-sectional area of the channel and the viscosityfof the liquid handled.
  • the tendency for a fluid to assume either a streamline or a turbulent flow may be estimated by determining the ,R r l r ll mbt .V ii invsl i t rs .d t mined that if the Reynolds number is below 2,000 the flow will normally be streamline, and if the Reynolds number exceeds about 4,000 it will normally be turbulent. Between these two numbers the tendency for a fluid to assume either streamline or turbulent fiow is usually indeterminate. H u s In the paper industry, 'to which this invention specifically relates, headbox stock consists of a suspension of papermaking fibres in water and is, therefore, not a homogeneous fluid.
  • headbo'rr stock usually contains in excess 'of 9 9% water
  • the viscosity of such stock varies with temperature as might be expected in accordance with the laws governing the viscosity of water.
  • the variations in viscosity of water with variations of headbox temperature customarily employed do not ekce ed the range from 0.3 to-l.0 centipois e. It is 'difiicult to measure accurately the variations in viscosity of flowing stock with changes in velocity, but enough meas'urements have been made to show definitely that there is a critical velocity at any given temperature and consistency (lbs. of stock per lb.
  • the Reynolds number referred to above may be determined by the following formula: :92
  • W is the weight rate of flow
  • Lp is the wetted perimeter of a cross-section of the passage
  • u is the viscosity Prior to this invention, in handling water or a stock suspension whose viscosity approached that of water, with commercial sizes of pipes or headbox channels, and
  • the Reynolds number is partially determined by viscosity and that in a flowing stock suspension the viscosity is mainly dependent on velocity. Therefore, if turbulence exists in a flow whose average velocity is well below the critical, localized turbulent areas will have localized velocities well above the average, with correspondingly lesser viscosities. Under these conditions the Reynolds number for the average condition may be only indicative of a tendency to assume a streamline or turbulent flow and there may be insufficient time as the stock flows through a channel to actually reach this condition.
  • Turbulent flow usually occurring when Reynolds numbers are in excess of 2,000, is characterized by irregular Whllllllg eddies within a fluid, unstable and yet continuously reforming.
  • the velocity within eddies may be high enough to reduce the viscosity close to that of the water,
  • Streamline flow usually occurring when Reynolds numbets are less than 2,000, is characterized by the flow of a fluid within a tube such that each filament of liquid flows in a straight line, parallel to the axis of the tube, moving at progressively higher velocity as the center of the tube is approached. It seems doubtful that a stock suspension whose consistency is suitable for headbox stock, can ever flow in a streamline condition.
  • Frozen flow of a stock suspension occurs when Reynolds numbers are below 2,000 and when eddy currents persisting from a previously turbulent flow have been dissipated. it is characterized by a thin shear zone adjacent to any surface of the channel contacted by the stock in which the fibres tend to roll or shear past one another, while all the rest of the cross-section of the flowing suspension appears to be frozen into a solid moving parallel to the axis of the channel and with uniform velocity throughout its cross-section. With little or no movement of the fibres in relation to one another within a frozen flow the gathering together of the fibres into flocs takes place very slowly or not at all.
  • a paper machine headbox It is the function of a paper machine headbox to take a number of streams from individual screens or to take stock from one or more pipes and to deliver this stock in a suitable condition to the slice orifice. It is impossible to create a completely stable jet from a slice orifice when the flow to the orifice contains turbulence, and a stable jet containing Well defined flocs is unsuitable for making a uniform sheet of paper.
  • the function of the slice used in conjunction with a headbox is to increase the velocity of flow to a controllable velocity about equal to the speed of the fourdrinier wire and usually in the form of a free jet of predetermined width and con trolled depth.
  • the present invention is specifically directed to a method of and apparatus for so controlling the flow of paper stock or a pulp suspension that its flow characteristics will be changed from a condition of full, turbulent flow to a condition of frozen flow, first by passing the pulp suspension from a receiving chamber through a plurality of restricted passages, then by conducting all the suspension through a single channel to establish frozen flow conditions, and finally to project the frozen flow stock suspension through the slice onto the wire of a papermaking machine.
  • a main supply pipe 5 which carries incoming stock is connected to the central part of a transversely positioned header 6 having a length '5 slightly greater than the width of the wire of the associated papermaking machine.
  • the stock flowing through the header 6 is flowing at a reduced rate and evenly discharged therefrom through a plurality of upwardly slanting discharge pipes 7 (see Figs. 1 and 7 of the drawings),
  • the headbox proper comprises an upwardly slanting, rectangular cross-sectioned channel portion 10 formed from sheet metal and having a width approximately equal to the width of the wire of the associated papermaking machine and a depth determined in accordance with the volume and rate of flow of stock adapted to be handled for any given set of operating conditions.
  • the interior of the channel portion 10 is filled with a plurality of tiers of relatively small diameter pipes 11 disposed in parallelism with the longitudinal axis of the channel 10 and spot-welded together.
  • the voids between the exteriors of the pipes 11 adjacent the ends thereof are completely filled as by suitable cement 12, as indicated in Figs. 2 and of the drawings.
  • Each pipe 11 at its intake end is provided with an orifice plate 13 having an orifice 14 of reduced diameter (see Figs. 5 and 6 of the drawings) to effect a temporary acceleration of the stock followed by a deceleration thereof within the pipe.
  • the pipes 11 as illustrated are of varying lengths with those on the lowermost tier being the longest and those on the uppermost tier being the shortest, but the average length of all of the pipes bears a definite relation to their diameter, as will be hereinafter more fully described.
  • the upper or discharge end of the channel 10 joins a relatively long, horizontally disposed channel portion 15 within which frozen flow' stock conditions become established.
  • the channel 15 is formed from sheet metal having a smooth inner surface and is provided at its discharge end with an adjustable slice assembly generally indicated at 16.
  • the slice assembly 16 itself may be of any suitable construction, but in order properly to follow the principles of this invention in its presently illustrated embodiment the included angle between the hat portion of adjustably positioned slice lip 17 and the horizontal apron 18 should be restricted to a maximum of 45 when using a depth of stockflow in the channel 15 of the nature to be hereinafter described. It will, of course, be apprectiated that variations in the maximum permissive included angle between the slice lipand apron may be provided for in order to conform to changes resulting from variations in one or more operating factors.
  • the headbox is shown as would be fabricated to operate as a pressure headbox in which.
  • the depth of flow of the pulp suspension in the horizontal channel 15' is less than the over all depth of the channel;
  • means are provided formaintaining air pressure in that portion of the channel 15 above the flowin pulp suspension and in the present instance comprises an inlet pipe 22 opening into the channel 15 and connected with-a suitable source (not shown) of compressed air.
  • a bleeder pipe 23 of relatively small diameter is affixed to one wall of and opens into the channel 15 at a height substantially equal to the designed depth of flow of the stock suspension.
  • An adjustable valve 24 generally will be provided so as to restrict the leakage of compressed air, and the discharge side of the valve 24 may be connected to the wire pit of the paper machine.
  • the channel 15 has a depth only sufiicient tovprovide for any given width of channel a cross-sectional area and flow capacity that willproperly receive the discharge from the multiple pipes 11 of the channel 10.
  • this invention also provides means for defloccing by creating a condition of mild turbulence in the flow which will subsequently resume a state of frozen flow before the slice is reached.
  • a rotatable cage-type of defioccing roll generally indicated at 25 (see Fig.
  • the defioccing roll 25 may be transversely positioned within the horizontal channel 15' with its axis of rotation located as at 26 or 27 and driven by suitable power connections (not shown). In either of the suggested positions of the defioccing roll 25 it will serve to break up any fioc formation while still permitting the stock to resume frozen flow stream characteristics as the stock reaches the slice and is projected therethrough'.
  • the most important considerations effecting the mechanical design and operational factors of the method include (a) the kind of stock, especially fibre size and surface area; (b) consistency of the stock suspension (weight of bone dry fibre relative to the weight of fibre plus water); (0) degree of turbulence and average velocity of how into the headbox; (d) rate of flow through the box per unit of width; (2) average velocities used throughout the headbox; (f) the general nature of the devices to be used for quickly converting the stock from turbulent flow to frozen flow; (g) maximum wire speed and corresponding desired jet velocity and head at the slice; (h) smoothness of the surfaces which the stock will contact; and (i) the temperature of the stock suspension.
  • the specifically disclosed embodiment of the invention may be considered .as' co-related to the following factors: (a) a newsprint grade of stock consisting of about groundwood pulp and 20% sulphite pulp; (b) headbox consistency about 0.60%; (c) a'single delivery pipe to the header 6'with an average flow velocity not exceeding 6.0 F. P. S.; (d) a maximum designed rate of how through the headbox" and sliceof 1.00 C. F. S. per foot of slice width; (e)'a maximum wire speed of 1200 per minute with a jetvelocity through the slice ofabo'utl8 per second under a pressure head equivalent to about 60 of water; and (f) a stock temperature of about 100 F.
  • the single supply pipe 5 for first receiving the incoming stock could be of 20" diameter and the header 6 with which it connects would be of 18" diameter to provide a split flow in the header having an average maximum velocity of about 3.67 per second.
  • the discharge pipes 7 would be 10" in diameter with an average maximum velocity of 4.0 per second and the orifice plates 8 thereof will serve to assure uniform distribution an average maximum velocity of 6.0 per second through the orifices.
  • the remainder of the length of these pipes in this specific: embodiment would be not less than 30 between the orifices and the chamber 9.
  • the stock is forced through the pipes 11 which under the above-mentioned operating conditions will be 4" in diameter, and their orifice plates 13 will have their orifices M of a diameter such as to provide a velocity of 6 per second therethrough.
  • part of the velocity head of flow through the orifices 14 is converted to static head in the pipes 11 and probably within a distance equal to eight diameters.
  • the pipes 11 should have an average length of twenty-two to thirty diameters in order that the principles of this invention may be properly followed.
  • the unconvertible portion of the velocity head in the pipes 11 is present in the form of turbulence, the kinetic energy of which is nearly all dissipated by friction with the walls of the pipes 11 before the stock leaves the discharge ends thereof.
  • the flow leaving the pipes 11 is still turbulent, but the kinetic energy remaining is relatively small so that the flow is in a condition to freeze readily and will do so. It may be of some interest to note at this point that it is extremely doubtful that any so-called streamline flow can take place under these operating conditions, but even if such could possibly be effected this invention is directed to the setting up of frozen flow conditions at least by the time the stock is ready to be projected through the slice.
  • the most favorable condition for freezing the stock has been found to exist when there is a moderate acceleration of the stock at the en trance to the horizontal channel, and it is believed that the present design elfects this, although the most important end result is to have frozen flow at the slice regardless of the exact conditions of acceleration, etc. at the entrance of the horizontal channel 15.
  • the flow of stock becomes frozen within an average distance of 6' from the discharge ends of the pipes ll when the stock tlow depth in the channel. 15 is maintained at 8" with a corresponding average flow velocity of 1.50 per second.
  • the bleeder pipe 25 will be positioned about 8 above the bottom of the channel 15 so that its axis is substantially even with the surface of the flowing stock.
  • the structure of the headbox can be altered slightly so that under such operating conditions the depth of the horizontal channel 15 will be reduced to that of the flowing stock so that the entire channel is filled with stock. In this case the level of the stock will remain constant within the channel 15 since the channel is kept filled and the use of the bleeder pipe may not be required.
  • this invention provides novel apparatus and method for so physically conditioning a flowing stream of stock that frozen flow conditions are reached prior to and are effective at the moment at which the stock is projected through the slice.
  • Apparatus of the character described including a flow channel of rectangular cross-section having a stockreceiving inlet chamber, an upwardly slanting portion extending from said inlet chamber and a horizontal portion extending from said upwardly shanting portion, said upwardly slanting portion being provided with a plurality of tiers of small diameter flow-modifying pipes disposed with their axes parallel to the longitudinal axis of said upwardly slanting portion, and means for filling the voids between the exteriors of said pipes whereby to force all stock leaving said inlet chamber to pass through said pipes.
  • Apparatus of the character described including a flow channel of rectangular cross-section having a stockreceiving inlet chamber, an upwardly slanting portion extending from said inlet chamber and a horizontal portion extending from said upwardly slanting portion, said upwardly slanting portion being provided with a plurality of tiers of small diameter flow-modifying pipes disposed with their axes parallel to the longitudinal axis of said upwardly slanting portion, means for filling the voids between the exteriors of said pipes whereby to force all stock leaving said inlet chamber to pass through said pipes, an orifice plate secured within each of said pipes adjacent the intake end thereof, and an adjustable slice mounted at the discharge end of said horizontal portion.
  • Apparatus of the character described including a flow channel of rectangular cross-section having a stockreceiving inlet chamber, an upwardly slanting portion extending from said inlet chamber and a horizontal portion extending from said upwardly slanting portion, said upwardly slanting portion being provided with a plurality of tiers of small diameter flow-modifying pipes disposed with their axes parallel to the longitudinal axis of said upwardly slanting portion, means for filling the voids between the exteriors of said pipes whereby to force all stock leaving said inlet chamber to pass through said pipes, an orifice plate secured within each of said pipes adjacent the intake end thereof, an adjustable slice mounted at the discharge end of said horizontal portion, and means for supplying stock to said inlet chamber.
  • Apparatus of the character described including a flow channel of rectangular cross-section having a stockreceiving inlet chamber, an upwardly slanting portion extending from said inlet chamber and a horizontal portion extending from said upwardly slanting portion, said upwardly slanting portion being provided with a plurality of tiers of small diameter flow-modifying pipes disposed with their axes parallel to the longitudinal axis of said upwardly slanting portion, means for filling the voids between the exteriors of said pipes whereby to force all stock leaving said inlet chamber to pass through said pipes, an orifice plate secured within each of said pipes adjacent the intake end thereof, an adjustable slice mounted at the discharge end of said horizontal portion, and means for supplying stock to said inlet chamber, said last named means including a relatively large diameter main stock supply pipe, a transversely disposed header connected to said stock supply pipe and having a diameter somewhat less than that of the supply pipe, and a plurality of pipes connecting said header with said inlet chamber.
  • Apparatus of the character described including a flow channel of rectangular cross-section having a stockreceiving inlet chamber, an upwardly slanting portion extending from said inlet chamber and a horizontal portion extending from said upwardly slanting portion, said upwardly slanting portion being provided with a plurality of tiers of small diameter flow-modifying pipes disposed with their axes parallel to the longitudinal axis of said upwardly slanting portion, means for filling the voids between the exteriors of said pipes whereby to force all stock leaving said inlet chamber to pass through said pipes, an orifice plate secured Within each of said pipes adjacent the intake end thereof, an adjustable slice mounted at the discharge end of said horizontal portion, and means for supplying stock to said inlet chamber, said last named means including a relatively large diameter main stock supply pipe, a transversely disposed header connected to said stock supply pipe and having a diameter somewhat less than that of the supply pipe, and a plurality of pipes connecting said header with said inlet chamber, each of said last named pipes having an or
  • Headbox apparatus for papermaking machines comprising a pipe for supplying stock under conditions of turbulent flow, a header connected with said supply pipe for receiving and adjusting the flow velocity of said stock, a plurality of discharge pipes extending from said header for further adjusting the flow velocity of said stock and beingconnected with the intake end of a flow box, said intake end of the flow box being provided with a chamber and a plurality of tiers of pipes extending upwardly therefrom in parallel aligned relationship for further adjusting the velocity of said stock, the intake end of each of the pipes in said tiers being provided with a stock-accelerating orifice, said flow box including an extended horizontal channel for receiving stock from said last-named pipes and for effecting conversion of the flow characteristics of said stock from a turbulent condition to a frozen flow condition, and a slice connected to said horizontal channel for projecting the frozen flow stock onto the wire of an associated paperrnaking machine.
  • Headbox apparatus for papermaking machines comprising a pipe for supplying stock under conditions of turbulent flow, a header connected with said supply pipe for receiving and adjusting the flow velocity of said stock, a plurality of discharge pipes extending from said header for further adjusting the flow velocity of said stock and being connected with the intake end of a flow box, the intake end of said flow box being provided with a chamber and a plurality of tiers of pipes extending therefrom in parallel aligned relationship for further adjusting the velocity of said stock, said flow box including an extended horizontal channel for receiving stock from said lastnamed pipes and for effecting conversion of the flow characteristics of said stock from a turbulent condition to a frozen flow condition, means for supplying compressed air to said horizontal channel to maintain pressure on the stock flowing therethrough, and a slice connected to said horizontal channel for projecting the frozen flow stock onto the wire of an associated papermaking machine.
  • Apparatus of the character described including a flow channel of rectangular cross-section having a stockreceiving inlet chamber, an upwardly extending portion projecting from said inlet chamber and comprising a plurality of flow-modifying pipes arranged in multi-layer parallel relationship, the free ends of said pipes extending into open communication with one end of an extended horizontal portion, an orifice plate being attached to each of said pipes adjacent the intake end thereof, and an adjustable slice mounted at the discharge end of said horizontal portion.
  • Headbox apparatus for papermaking machines comprising a pipe for supplying stock under conditions of turbulent flow, a header connected with said supply pipe for receiving and adjusting the flow velocity of said stock, a plurality of orifice-containing discharge pipes extending from said header for accelerating and decelerating said stock and being connected with the intake end of a flow box, the intake end of said flow box being provided with a chamber of rectangular cross section extending across the full width thereof, means for further accelerating and decelerating said stock comprising upwardly extending multi-layered closely spaced parallel-aligned conduits each defining a passageway having a length several times greater than the maximum cross-sectional diameter of said conduit and an orifice plate attached to each of said conduits adjacent the intake end thereof, the other ends of said conduits entering into open communication with an extended horizontal channel, and a slice connected to the discharge end of said horizontal channel for projecting said stock onto the wire of an associated papermaking machine.
  • Apparatus of the character described including a flow channel of rectangular cross-section having a stockreceiving inlet chamber, an upwardly slanting portion ex tending from said inlet chamber and a horizontal portion extending from said upwardly slanting portion, said upwardly slanting portion being provided with a plurality of tiers of small diameter flow-modifying pipes disposed with their axes parallel to the longitudinal axis of said upwardly slanting portion, said small diameter flow-modifying pipes being so constructed and arranged that no stock is admitted into the voids between the exteriors thereof, an orifice plate secured within each of said pipes adjacent the intake end thereof, an adjustable slice mounted at the discharge end of said horizontal portion, and means for supplying stock to said inlet chamber, said last named means including a relatively large diameter main stock supply pipe, a transversely disposed header connected to said stock supply pipe and having a diameter somewhat less than that of the supply pipe, and a plurality of orificecontaining pipes connecting said header with said inlet chamber.

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US157869A 1950-04-25 1950-04-25 Headbox for paper machine Expired - Lifetime US2737087A (en)

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Application Number Priority Date Filing Date Title
US157869A US2737087A (en) 1950-04-25 1950-04-25 Headbox for paper machine
GB23053/50A GB683983A (en) 1950-04-25 1950-09-20 Improvements in or relating to papermaking method and apparatus
FR1030612D FR1030612A (fr) 1950-04-25 1950-09-22 Perfectionnements apportés aux procédés et dispositifs pour la fabrication du papier
AT183642D AT183642B (de) 1950-04-25 1950-10-30 Verfahren und Vorrichtung zur physikalischen Aufbereitung von Papierstoff

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US157869A US2737087A (en) 1950-04-25 1950-04-25 Headbox for paper machine

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US2737087A true US2737087A (en) 1956-03-06

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US (1) US2737087A (de)
AT (1) AT183642B (de)
FR (1) FR1030612A (de)
GB (1) GB683983A (de)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2847913A (en) * 1956-02-07 1958-08-19 Rice Barton Corp Stock inlet system for a paper making machine
US2860552A (en) * 1955-01-26 1958-11-18 Black Clawson Co Flow evener roll for paper making machines
US2876684A (en) * 1957-02-06 1959-03-10 Sandy Hill Iron & Brass Works Head box
US2911041A (en) * 1956-12-27 1959-11-03 Beloit Iron Works Stock distributor assembly
US2920699A (en) * 1956-12-14 1960-01-12 Sandy Hill Iron And Brass Work Paper making apparatus
US3002558A (en) * 1957-12-21 1961-10-03 Voith Gmbh J M Flow distributor for fiber material for use in connection with paper making machines
US3067815A (en) * 1958-05-09 1962-12-11 Voith Gmbh J M Suspension distributing system
US3164513A (en) * 1961-12-14 1965-01-05 West Virginia Pulp & Paper Co Distributor system for a paper machine headbox
DE1236922B (de) * 1962-04-12 1967-03-16 Karlstad Mekaniska Ab Stoffauflauf fuer Papiermaschinen
DE1290797B (de) * 1965-05-27 1969-03-13 Beloit Corp Stoffauflaufkasten fuer eine Papiermaschine
DE1295345B (de) * 1964-02-17 1969-05-14 Thunes Mek Vaerk As Stoffauflauf fuer Papiermaschinen

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2879904A (en) * 1956-11-19 1959-03-31 Clear Fir Products Co Inc Feeding apparatus for fibrous particles

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Publication number Priority date Publication date Assignee Title
US851227A (en) * 1907-02-28 1907-04-23 Eibel Process Co Fourdrinier machine.
US1610742A (en) * 1924-07-25 1926-12-14 Bucking Carl Manufacture of paper
US1890634A (en) * 1930-12-23 1932-12-13 Wenzel Max Flow rectifier for paper stock
US1909150A (en) * 1931-10-21 1933-05-16 Bell-Irving Robert Fourdrinier head box and nozzle assembly
US2156445A (en) * 1936-06-03 1939-05-02 Burke M Baxter Paper making apparatus
US2186761A (en) * 1936-10-08 1940-01-09 Dominion Eng Works Ltd Paper making machine
US2205693A (en) * 1936-03-21 1940-06-25 Milne Samuel Paper-making machine
US2225435A (en) * 1936-08-06 1940-12-17 Paper Patents Co Paper making machine
US2347130A (en) * 1941-01-29 1944-04-18 Paper Patents Co Inlet system for paper machines
US2509822A (en) * 1946-12-21 1950-05-30 Beloit Iron Works Stock inlet

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US851227A (en) * 1907-02-28 1907-04-23 Eibel Process Co Fourdrinier machine.
US1610742A (en) * 1924-07-25 1926-12-14 Bucking Carl Manufacture of paper
US1890634A (en) * 1930-12-23 1932-12-13 Wenzel Max Flow rectifier for paper stock
US1909150A (en) * 1931-10-21 1933-05-16 Bell-Irving Robert Fourdrinier head box and nozzle assembly
US2205693A (en) * 1936-03-21 1940-06-25 Milne Samuel Paper-making machine
US2156445A (en) * 1936-06-03 1939-05-02 Burke M Baxter Paper making apparatus
US2225435A (en) * 1936-08-06 1940-12-17 Paper Patents Co Paper making machine
US2186761A (en) * 1936-10-08 1940-01-09 Dominion Eng Works Ltd Paper making machine
US2347130A (en) * 1941-01-29 1944-04-18 Paper Patents Co Inlet system for paper machines
US2509822A (en) * 1946-12-21 1950-05-30 Beloit Iron Works Stock inlet

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2860552A (en) * 1955-01-26 1958-11-18 Black Clawson Co Flow evener roll for paper making machines
US2847913A (en) * 1956-02-07 1958-08-19 Rice Barton Corp Stock inlet system for a paper making machine
US2920699A (en) * 1956-12-14 1960-01-12 Sandy Hill Iron And Brass Work Paper making apparatus
US2911041A (en) * 1956-12-27 1959-11-03 Beloit Iron Works Stock distributor assembly
US2876684A (en) * 1957-02-06 1959-03-10 Sandy Hill Iron & Brass Works Head box
US3002558A (en) * 1957-12-21 1961-10-03 Voith Gmbh J M Flow distributor for fiber material for use in connection with paper making machines
US3067815A (en) * 1958-05-09 1962-12-11 Voith Gmbh J M Suspension distributing system
US3164513A (en) * 1961-12-14 1965-01-05 West Virginia Pulp & Paper Co Distributor system for a paper machine headbox
DE1236922B (de) * 1962-04-12 1967-03-16 Karlstad Mekaniska Ab Stoffauflauf fuer Papiermaschinen
DE1295345B (de) * 1964-02-17 1969-05-14 Thunes Mek Vaerk As Stoffauflauf fuer Papiermaschinen
DE1290797B (de) * 1965-05-27 1969-03-13 Beloit Corp Stoffauflaufkasten fuer eine Papiermaschine

Also Published As

Publication number Publication date
AT183642B (de) 1955-10-25
GB683983A (en) 1952-12-10
FR1030612A (fr) 1953-06-16

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