EP0046434B1 - Vorrichtung zum Steuern des Oberlippenteils eines Stoffauflaufkastens in einer Papiermaschine - Google Patents

Vorrichtung zum Steuern des Oberlippenteils eines Stoffauflaufkastens in einer Papiermaschine Download PDF

Info

Publication number
EP0046434B1
EP0046434B1 EP81401294A EP81401294A EP0046434B1 EP 0046434 B1 EP0046434 B1 EP 0046434B1 EP 81401294 A EP81401294 A EP 81401294A EP 81401294 A EP81401294 A EP 81401294A EP 0046434 B1 EP0046434 B1 EP 0046434B1
Authority
EP
European Patent Office
Prior art keywords
thermodilatable
heating
point
mounting means
blade
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP81401294A
Other languages
English (en)
French (fr)
Other versions
EP0046434A1 (de
Inventor
François Marie Paul Brieu
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Chleq Frote et Cie
Original Assignee
Chleq Frote et Cie
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Chleq Frote et Cie filed Critical Chleq Frote et Cie
Priority to AT81401294T priority Critical patent/ATE22582T1/de
Publication of EP0046434A1 publication Critical patent/EP0046434A1/de
Application granted granted Critical
Publication of EP0046434B1 publication Critical patent/EP0046434B1/de
Expired legal-status Critical Current

Links

Images

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F7/00—Other details of machines for making continuous webs of paper
    • D21F7/06—Indicating or regulating the thickness of the layer; Signal devices
    • 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
    • D21F1/028—Details of the nozzle section
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G9/00—Other accessories for paper-making machines
    • D21G9/0009—Paper-making control systems

Definitions

  • the present invention relates to a device for fine adjustment of the position of a scraper blade, in particular of a lip of the arrival box of a paper or cardboard machine. It also relates to a method for adjusting a property of the material continuously produced on a machine having a scraper blade, for example a machine for making paper or cardboard, by fine adjustment of the position of the scraper blade.
  • the arrival box of a paper machine transforms the flow of the fibrous suspension, forming the paper pulp, from a cylindrical vein into a blade or layer corresponding to the width of formation of the sheet.
  • This arrival box is presented as a reservoir of variable shape, the front face of which is pierced downwards with a slot provided with lips between which the liquid paste is projected onto a manufacturing table.
  • the function of the arrival box is to ensure a constant and regular flow of the fibrous suspension over the entire width of the machine which can reach 9 m in the case of modern installations.
  • the blade or layer of fibrous suspension also containing mineral fillers, is driven off under a pressure of between approximately 0.03 and 2 bars between the lips, in modern fast machines.
  • the regularity of the speed of exit of the layer of fibrous suspension and the thickness conditions with the regularity of the concentration, that of the weight per unit area of the product produced.
  • the flow takes place between two metallic lips, one of which is fixed and the other is movable as a whole so that it adjusts the thickness.
  • the movable lip usually the upper lip, is deformable along its length under the action of rods controlled by manual screw jacks.
  • a modern machine inlet box has several dozen such manual cylinders.
  • inward boxes have been constructed in which the manual adjustment jacks are each controlled by a geared motor assembly itself controlled as a function of continuous mass measurements, by means of a computer which receives the result of the mass measurements and calculates the corrections to be made by action on machine elements and in particular on the movable lip.
  • U.S. Patent 2,779,253 describes a purely mechanical adjustment device for the movable lip of a headbox of a paper machine. According to this patent, the adjustment is carried out in a purely mechanical manner using the jacks, and the variations are detected using a mechanical comparator.
  • French patent n ° 1,192,516 describes an apparatus for adjusting the orifice for the passage of paper pulp into an arrival box by swelling and deflation of bladders which delimit the edges of the lips. It is therefore a pneumatic or hydraulic device.
  • patents of the United States of America No. 2,938,231 and 3,940,221 describe plastic extrusion dies in which the position of a part of a first side of the die is adjusted using a thermodilatable device.
  • the aforementioned patent of the United States of America No. 3,940,221 describes an extrusion die also intended for paper machines comprising a block of which a part intended to delimit the outlet orifice is separated from the body of the block by a thinned part so that it has a certain elasticity.
  • a thermodilatable rod repels more or less. minus this flexible end in order to precisely determine its position.
  • the extrusion dies are different devices from the lips of the boxes of arrival of paper machines.
  • the material in an extrusion die, the material is driven off under extremely high pressure.
  • the die must form a channel with almost parallel walls, at least over a certain distance, so that they gradually guide the material which undergoes an alignment effect during its directed flow in the orifice of the die.
  • the thermodilatable device is mechanically stressed in a very significant way, which limits its length to avoid deformations or ruptures. The adjustment possibilities are therefore limited to a range of amplitude that is insufficient for its application to the lip of an incoming box of a paper machine.
  • the invention relates to such a device having a positioning member mounted between the frame of the machine and the lip, and a device for heating the positioning member so that the length thereof varies and ensures the maintenance of the lip. in the desired position.
  • the latter is determined from the results of continuous measurement, for example mass measurement, by a computer which allows the control of the heating devices of numerous organs placed along the arrival box.
  • the positioning device is therefore a passive mechanism requiring no maintenance and no lubrication, and having extremely high reliability.
  • the device also comprises a coarse adjustment device, for example a manual screw jack, intended to modify the distance between the two points of cooperation.
  • a coarse adjustment device for example a manual screw jack
  • an additional heating device is intended to heat the mounting member, between its location of cooperation with the thermodilatable part and one of the points.
  • thermo insulation device is advantageously placed between the mounting member and the thermodilatable part.
  • the positioning member can advantageously further comprise a force transmitting element intended to cause the displacement of the lip in said determined direction while the thermodilatable part lengthens and shortens in another direction.
  • this force transmitting element or another element can constitute a multiplying element which causes a displacement of the scraper blade substantially equal to a multiple of the distance traveled by the end of the thermodilatable part which is opposite to that which is coupled. to the mounting member.
  • the device for heating the thermodilatable part and, if necessary, the device for heating the mounting member are of at least one type chosen from at least one Joule effect heating element placed in contact thermal with the positioning member, a direct Joule heating device of the positioning member by circulation of an electric current therein, a flame heating device, and a heating device in contact with a heat transfer fluid.
  • thermodilatable part is flexible, and the device further comprises a spring intended to push the scraper blade in a direction substantially parallel to said determined direction.
  • the device according to the invention comprising a mounting part and a thermodilatable part, placed on the same side of their point of cooperation, it is advantageously possible to adjust the heating either of the thermodilatable part or of the mounting part, depending on whether the lip should be moved one way or the other.
  • FIG. 1 represents the mounting of the positioning device in an incoming box of known type and only a part of which is shown, this box having a frame 10.
  • the fibrous suspension blade formed by the box passes between a fixed lip 12, substantially horizontal, and a movable lip 14.
  • the blade is formed on the cylinder 16 at the head of the manufacturing table comprising a metal fabric 18 supported by a support 20 just after the cylinder 16.
  • the end of the movable lip 14 which is the one closest to the manufacturing table is fixed to a tube 22 by an articulation 24.
  • the tube 22 passes through orifices 26 and 28 of organs of the frame 10 of the box.
  • the other end of the tube 22 is fixed to a screw jack 30 controlled by hand by a knurled button 32.
  • the fixed part of the jack is mounted on a support tube 34 fixed to the frame. This tube 34 is pierced with small holes 36 at its upper part.
  • the positioning device comprises the tube 22, the screw jack 30 and the tube 34.
  • FIG. 2 represents in greater detail the upper part of the tube 22.
  • the interior of the tube contains an electric heating element 38 having wires 40 for connection which pass through an orifice 42 in the wall of the tube 22.
  • a lining 44 of a powder of a material having good thermal conductivity advantageously maintains the heating element 38 in the tube 22.
  • the length of the resistor 38 introduced into the tube 22 is 1 m.
  • the tube 22 is itself formed of brass and, when the resistor whose power is equal to 70 W and which is supplied at a voltage of 20 V, operates at its maximum power, the tube reaches a maximum temperature of 90 ° vs. Under these conditions, the variation in length of the tube 22 between these two extreme temperatures is of the order of 1.2 mm.
  • the thickness of the fibrous suspension blade formed on the manufacturing table is generally between 5 and 40 mm, this adjustment range is entirely satisfactory for the correction of the variations observed during manufacture, when the coarse adjustment was carried out manually under the control of screw jacks 30.
  • control of the heating elements of the various positioning devices can be carried out according to the many known techniques, for example by variation of the applied voltage, by variation of the duration of application of a fixed voltage, by variation of the pulse frequency applied or by any other method or combination of control methods well known to those skilled in the art.
  • the tube 22 can be in the form of a double envelope in which circulates a cooling liquid, for example water.
  • the movable lip is initially adjusted using the screw jacks 30 so that it is parallel with fixed lip.
  • the paper machine is then put into production.
  • a sheet profile is established.
  • the positioning devices being initially cold, the parts of the sheet which are too heavy can be corrected by heating the positioning devices which correspond to these strong points, so that they expand.
  • Figure 3 is similar to Figure 1 and shows a variant of the positioning device according to the invention.
  • the length of the positioning device is shorter than that of the device of FIG. 1.
  • the references identical to those of FIG. 1 designate similar elements.
  • the frame 10 of an arrival box having a fixed lip 12 and a movable lip 14, forming a fibrous suspension blade on the cylinder 16 at the head of a manufacturing table supports a device positioning device which comprises a tube 46, similar to the tube 22 but much shorter, a screw jack 48 which may be identical to the jack 30 of the embodiment of FIG. 1, and a support tube 50 similar to the tube 34.
  • the changes in length of the tube are not transmitted directly to the movable blade 14 but through a connecting rod 54.
  • the latter is articulated at 52 at the end of the tube 46.
  • One end of the connecting rod is articulated at 56 on the frame 10 while the other end is articulated at 58 on a rod 60 which is itself articulated at 62 on the movable lip 14.
  • the distance between the joint 52 of the thermodilatable tube 46 and the joint 56 on the frame 10 is much less than the distance separating the joint 58 from the rod 60 which controls the movement of the lip 14 at the joint 56 In this way, the displacement of the rod 46 is amplified by the connecting rod 54.
  • the force which must be applied to the movable lip 14 by a positioning device is at most of the order of 200 N, the force applied by the tube 46 at the joint 52 is only of the order of 600 N, when the multiplication ratio is three. Such a force can be easily applied by a tube of small diameter and small wall thickness.
  • FIG. 4 represents a variant of the device according to the invention ensuring differential positioning. This differential adjustment is represented in its application to the embodiment of FIG. 3, but it should be noted that it also applies generally to all the other embodiments.
  • the rod 76 corresponding to the rod 46 of the embodiment of Figure 3, is mounted on the screw jack 48 and it passes through the orifice 26 of the frame 10.
  • the tube 50 of support is replaced by a tube 78 which has the same role as the tube 50 but which, moreover, advantageously has a relatively high coefficient of thermal expansion.
  • a heating element 80 in the form of a resistance heating sleeve surrounds the support tube 78. It receives electrical energy from a power supply which is not shown, by wires which are not shown.
  • a thermal insulation sleeve 82 is held between the rod 76 and the support tube 78.
  • This embodiment has a much greater sensitivity than those of FIGS. 1 to 3 because it is known that the heating can be much faster than natural cooling. It is therefore an interesting variant which can be used instead of forced cooling of the tube 76.
  • FIG. 5 shows a variant of the device of Figure 1.
  • the references 10, 14 and 30 represent the same elements as in Figure 1, namely the frame, the adjustment lip and the screw jack.
  • This embodiment comprises a flexible type positioning member 84, shown in more detail in FIG. 6, placed in a support tube 86, quite similar to tube 34 or 50.
  • the positioning member 84 has four bands flexible formed of a suitable metal alloy, for example "Kanthal which is used for the formation of electrical resistances and which however has a good mechanical resistance.
  • the ends of the strips 86 are clamped in two supports 88 and 90.
  • the latter has an extension 92 intended to be fixed to the jack 30 while the support 88 has a tab 94 pierced with a hole intended for the passage of a threaded rod protruding a lever 96.
  • the latter is articulated on arms 100 fixed to the frame 10 and on a rod 98 for controlling the lip 14.
  • a spring 102 is advantageously disposed between the frame and the lever 96 so that it pushes this lever in the direction which causes the application of a traction force to the positioning member 84.
  • the advantage of the positioning member 84 is that it is heated directly by the Joule effect and therefore has a high sensitivity to heating. In addition, as it is formed by flat strips of small thickness and yet having a large surface area, it cools quickly.
  • the lever 96 represents an example of a force transmission element, but the mounting can also be carried out as shown in FIG. 3, with suitable movement of the spring 102.
  • the arm 100 can be placed in any suitable location so that it gives the desired multiplier ratio, for example equal to 1.
  • Figures 7 and 8 show a variant of flexible positioning member, similar to the member 84 of Figure 6.
  • the member 104 comprises a first end support 106, provided with a tab 108 similar to the lug 94 of the member 84, and another end support 110 provided with a device 112 for mounting on a screw jack.
  • the resistance heating wires 114 having good mechanical resistance that in traction, pass over insulating sleeves carried by screws 116 passing through the support 106 and over other insulating sleeves carried by screws 118 and 120 placed on the other support 110.
  • the wires are held on the support 110 so that they can transmit tensile forces between the two supports 106 and 110.
  • This flexible positioning member 104 can be used in place of the member 84 in the embodiment of FIG. 5, and it has the same benefits as this one.
  • FIG. 9 represents another example of application of the invention.
  • This is a very simple diagram of a blade coater.
  • a paper 64 is entrained on a cylinder 68 and a coating roller 66 applies a surface layer of an aqueous dispersion containing for example essentially particles of kaolin and a suitable adhesive.
  • a blade 70 is applied against the paper 64 carried by the cylinder 66 and the regularity of the layer formed requires the application of a certain force to the blade 70.
  • the positioning devices are perfectly suited for this purpose, given their range of setting. There is shown diagrammatically, in FIG. 4, the end of a tube 72 of a positioning device which can be of a type analogous to those which are represented in FIGS. 1 to 4.
  • a joint 74 transmits the force applied by the tube 72 to the blade 70.
  • the invention is not limited to the particular embodiments described.
  • a horizontal type paper machine has been considered, the invention applies equally well to the adjustment of the movable lip in vertical machines.
  • the fine adjustment device according to the invention has been described in a form associated with a coarse adjustment device, formed by a screw jack 30 or 48.
  • the invention is also suitable for modern cases, each of which rod is controlled by a geared motor group.
  • the geared motor unit provides only a coarse adjustment and the heating of the positioning devices according to the invention ensures the fine adjustment.
  • fine adjustment devices according to the invention are very reliable given their essentially passive nature, do not require maintenance, do not require lubrication, and are particularly inexpensive.
  • the technology necessary for implementing the invention has also been known to those skilled in the art for several decades.

Landscapes

  • Paper (AREA)

Claims (10)

1. Vorrichtung zur Feineinstellung der gegenüber einem feststehenden Abschnitt eines Trägers (10) eines Auflaufkastens einer Papiermaschine eingenommenen Position einer zum Streichen eines Fluids auf einer Oberfläche dienenden, eine Lippe zur Steuerung der Dicke einer Schicht einer faserigen Suspension zur Bildung eines Papiers darstellenden Platte (14) durch deren Verstellung in eine bestimmte Richtung, mit einem an einer ersten Stelle mit dem Träger (10) und an einer zweiten Stelle (24) mit der Streichplatte (14) zusammenwirkenden :
Einstellorgan (22, 34), einer Heizvorrichtung (38) an wenigstens einem wärmedehnbaren, dünnen Abschnitt (22.46,76,84.104.114) des die beiden Stellen verbindenden Einstellorgans und einem Organ zur Steuerung der Heizvorrichtung in Abhängigkeit von der gewünschten Position der Streichplatte gegenüber dem Träger (10), dadurch gekennzeichnet,
daß das Einstellorgang aus zwei Teilen besteht, deren erstes allein den genannten wärmedehnbaren Abschnitt (22, 46, 76, 84, 104, 114) darstellt, dessen eines Ende mit der genannten ersten Stelle über das zweite Teil des Einstellorgans verbunden ist, wobei dieses ebenfalls dünne Teil als Befestigungsorgan (34, 50, 78, 86) dient, dessen eines Ende an der genannten ersten Stelle befestigt ist, während sein anderes Ende mit dem anderen Ende des wärmedehnbaren Abschnittes (22, 46, 76, 84, 104, 114) gekoppelt ist, das von der genannten zweiten Stelle (24, 62) aus gesehen jenseits der genannten ersten Stelle liegt, wobei das genannte Befestigungsorgan (34, 50, 78, 86) zum genannten wärmedehnbaren Abschnitt (22, 46, 76, 104, 114) parallel ist.
2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Verbindung des wärmedehnbaren Abschnittes mit dem Befestigungsorgan durch eine Vorrichtung (30) zur Grobregelung, beispielsweise eine handbetätigbare Schraubenwinde gebildet ist, die der Änderung des Abstandes zwischen den beiden Stellen des Zusammenwirkens dient.
3. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß das Befestigungsorgan (34, 78) rohrförmig ausgebildet ist.
4. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß das Befestigungsorgan (34) insbesondere durch Konvektion oder Zirkulation einer Kühlflüssigkeit gekühlt ist.
5. Vorrichtung nach Anspruch 3, dadurch gekennzeichnet, daß das genannte Befestigungsorgan (78) eine Heizvorrichtung (80) aufweist.
6. Vorrichtung nach Anspruch 5, dadurch gekennzeichnet, daß sie außerdem eine Wärmeisolierung (82) aufweist, die zwischen Befestigungsorgan (78) und wärmedehnbarem Abschnitt (76) angeordnet ist.
7. Vorrichtung nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß das Einstellorgan außerdem ein Teil zur Übertragung der die Verstellung der Streichplatte in die genannte vorherbestimmte Richtung erzeugenden Kraft aufweist, wenn sich der wärmedehnbare Abschnitt in eine andere Richtung verlängert und verkürzt.
8. Vorrichtung nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß sie außerdem ein Multiplikationsglied (54) aufweist, das eine Verstellung der Streichplatte (14) bewirkt, die im wesentlichen gleich einem Vielfachen des von dem Ende des wärmedehnbaren Abschnittes (46) durchlaufenden Weges ist, das dem mit dem Befestigungsorgan (50) gekoppelten gegenüberliegt.
9. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Heizvorrichtung (38) des wärmedehnbaren Abschnittes und gegebenenfalls die Heizvorrichtung (80) des Befestigungsorgans zu der Gruppe gehören, die wenigstens ein durch Joule-Effekt heizendes Element enhält, das in thermischem Kontakt mit dem Einstellorgan angeordnet ist, eine direkt durch Joule-Effekt des Einstellorgans mittels eines darin fließenden elektrischen Stromes wirksame Heizvorrichtung, eine durch Flamme wirksame Heizvorrichtung und eine durch Kontakt mit einer wärmeführenden Flüssigkeit wirksame Heizvorrichtung.
10. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß sie außerdem ein elastisches Glied (102) aufweist, das die Streichplatte (14) in eine im wesentlichen zur genannten vorherbestimmten Richtung parallelen Richtung zurückdrängt.
EP81401294A 1980-08-18 1981-08-12 Vorrichtung zum Steuern des Oberlippenteils eines Stoffauflaufkastens in einer Papiermaschine Expired EP0046434B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81401294T ATE22582T1 (de) 1980-08-18 1981-08-12 Vorrichtung zum steuern des oberlippenteils eines stoffauflaufkastens in einer papiermaschine.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8018048A FR2488628A1 (fr) 1980-08-18 1980-08-18 Dispositif et procede de reglage fin de la levre d'une caisse d'arrivee d'une machine a papier
FR8018048 1980-08-18

Publications (2)

Publication Number Publication Date
EP0046434A1 EP0046434A1 (de) 1982-02-24
EP0046434B1 true EP0046434B1 (de) 1986-10-01

Family

ID=9245234

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81401294A Expired EP0046434B1 (de) 1980-08-18 1981-08-12 Vorrichtung zum Steuern des Oberlippenteils eines Stoffauflaufkastens in einer Papiermaschine

Country Status (6)

Country Link
US (1) US4406740A (de)
EP (1) EP0046434B1 (de)
AT (1) ATE22582T1 (de)
CA (1) CA1177300A (de)
DE (1) DE3175415D1 (de)
FR (1) FR2488628A1 (de)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4505779A (en) * 1982-09-13 1985-03-19 Measurex Corporation Method of modifying a paper machine headbox slice rod assembly
CA1157697A (en) * 1982-12-23 1983-11-29 Norman F. Dove Lip adjustment device
US4517055A (en) * 1983-06-06 1985-05-14 Dove Norman F Slice lip control
US4680089A (en) * 1985-01-22 1987-07-14 Measurex Corporation Process for controlling the formation of sheet material
DE3628699A1 (de) * 1986-08-23 1988-03-03 Voith Gmbh J M Stoffauflauf
AT388948B (de) * 1986-11-27 1989-09-25 Voith Gmbh J M Stoffauflauf fuer papiermaschinen od.dgl.
DE3644454C1 (de) * 1986-12-24 1988-08-04 Voith Gmbh J M Stoffauflauf fuer eine Papiermaschine od.dgl.
DE3644983A1 (de) * 1986-12-24 1988-07-07 Voith Gmbh J M Stoffauflauf fuer eine papiermaschine od. dgl.
DE3804827A1 (de) * 1988-02-17 1989-08-31 Voith Gmbh J M Stoffauflauf fuer eine papiermaschine od. dgl.
DE3927401C2 (de) * 1989-08-19 1996-02-29 Voith Gmbh J M Stoffauflauf
DE4103259A1 (de) * 1991-02-04 1992-09-03 Voith Gmbh J M Stoffauflauf
CN105074984B (zh) * 2013-02-21 2017-08-11 奥迪股份公司 无穿孔的燃料电池气体扩散层
FI12320U1 (fi) * 2018-12-20 2019-03-15 Valmet Technologies Oy Kuiturainakoneen sihti
SE543802C2 (en) * 2019-12-20 2021-07-27 Stora Enso Oyj Method for determining film thickness, method for producing a film and device for producing a film

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2938231A (en) * 1958-10-02 1960-05-31 Blaw Knox Co Plastic extrusion die
US3940221A (en) * 1973-09-10 1976-02-24 Welex Incorporated Thickness control system for an extrusion die

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2779253A (en) * 1953-12-24 1957-01-29 Thomas M Owens Adjustable slice for papermaking machinery
FR1192516A (fr) * 1957-01-01 1959-10-27 Albert E Reed & Company Ltd Perfectionnements aux machines à papier
US2993538A (en) * 1958-11-10 1961-07-25 Wartsila Yhtyma Oy Wartsila Ko Front wall for a stock head box
US3261893A (en) * 1962-10-04 1966-07-19 Goodyear Tire & Rubber Thermally adjusted casting blade
US3620914A (en) * 1967-04-28 1971-11-16 Industrial Nucleonics Corp Headbox jet velocity measuring system and method
US3575799A (en) * 1968-07-15 1971-04-20 Allis Chalmers Mfg Co Apparatus for adjusting the slice opening of a papermaking machine headbox
US3914156A (en) * 1973-08-29 1975-10-21 Westvaco Corp Papermaking machine headbox slice opening adjusting screws

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2938231A (en) * 1958-10-02 1960-05-31 Blaw Knox Co Plastic extrusion die
US3940221A (en) * 1973-09-10 1976-02-24 Welex Incorporated Thickness control system for an extrusion die
US3940221B1 (de) * 1973-09-10 1993-07-27 W Bar E Inc

Also Published As

Publication number Publication date
ATE22582T1 (de) 1986-10-15
US4406740A (en) 1983-09-27
FR2488628B1 (de) 1985-02-08
CA1177300A (en) 1984-11-06
DE3175415D1 (en) 1986-11-06
FR2488628A1 (fr) 1982-02-19
EP0046434A1 (de) 1982-02-24

Similar Documents

Publication Publication Date Title
EP0046434B1 (de) Vorrichtung zum Steuern des Oberlippenteils eines Stoffauflaufkastens in einer Papiermaschine
EP1817955B1 (de) Anlage und Verfahren zur Herstellung von Röhren zur tropfenweisen Bewässerung
FR2483379A1 (fr) Procede et dispositif destines a maintenir une matiere en bande a distance d'un organe de guidage directionnel pendant son deroulement
EP0970602A1 (de) Verfahren zur Herstellung eines Tropfbewässerungsschlauches, Produktionslinie zu seiner Durchführung und mit diesem Verfahren erhaltener Schlauch
FR2568903A1 (fr) Dispositif et procede de traitement d'une bande de matiere
FR2727890A1 (fr) Procede de fabrication de tuyaux d'irrigation goutte-a-goutte
FR2568168A1 (fr) Extrudeuse, utilisee notamment pour l'extrusion d'une matiere thermoplastique
EP0065428B1 (de) Walze mit einstellbarer Durchbiegung, insbesondere für die Papierindustrie
FR2712878A1 (fr) Procédé et dispositif pour enrouler un matériau en forme de bande.
FR2672542A1 (fr) Dispositif de detection, dans une machine, de la position de contact de deux cylindres d'axes paralleles.
FR2755057A1 (fr) Dispositif de mise en appui de rouleaux contre des surfaces rotatives
FR2662379A1 (fr) Procede et dispositif pour le reglage automatique des dresseurs a galets.
EP0599062B1 (de) Vorrichtung zur Begrenzung einer Leimauftragsbreite in einer Schichtmaschine
EP0493165A1 (de) Verfahren und Vorrichtung zum warmen Verformen eines Werkstückes, insbesondere zum Biegen
EP1541014B1 (de) Methode zur Herstellung von Tropfenbewässerungsrohren
FR2638176A1 (fr) Caisse de tete pour machine de fabrication de nappes de matiere en fibres, notamment de bandes de papier
FR2663391A1 (fr) Joint d'etancheite pour enceinte sous pression, notamment pour machine de fabrication de carton ondule.
EP0659933A1 (de) Verfahren zur Steuerung und Regelung der Entwässerung einer Fasersuspension in der Nasspartie einer Papiermaschine und Vorrichtung zur Durchführung des Verfahrens
FR2670514A1 (fr) Procede et dispositif pour compenser le flechissement d'une poutre de support de racle.
EP1602273B1 (de) Vorrichtung zur Herstellung von Bewässerungsrohren zur Tropfbewässerung
FR2698580A1 (fr) Dispositif pour plaquer sur un cylindre de refroidissement le film sortant d'une filière plate.
FR2754516A1 (fr) Dispositif de conditionnement en continu de cachets en bandes d'etuis individuels
FR2741055A1 (fr) Dispositif de regulation de la pression d'empilage pour un dispositif d'empilage horizontal de cahiers
FR2715670A1 (fr) Dispositif de réglage fin des vannes de régulation d'une caisse de tête de machine à papier.
FR2499115A1 (fr) Raffineur de pate a papier a puissance reglable

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19811009

AK Designated contracting states

Designated state(s): AT DE FR GB IT SE

ITF It: translation for a ep patent filed
GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT DE FR GB IT SE

REF Corresponds to:

Ref document number: 22582

Country of ref document: AT

Date of ref document: 19861015

Kind code of ref document: T

REF Corresponds to:

Ref document number: 3175415

Country of ref document: DE

Date of ref document: 19861106

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
ITTA It: last paid annual fee
EAL Se: european patent in force in sweden

Ref document number: 81401294.4

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19960805

Year of fee payment: 16

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 19960812

Year of fee payment: 16

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19960820

Year of fee payment: 16

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19960826

Year of fee payment: 16

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 19960827

Year of fee payment: 16

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19970812

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19970812

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19970813

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19970812

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19980430

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19980501

EUG Se: european patent has lapsed

Ref document number: 81401294.4

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST