EP0815318B2 - Procede d'essorage d'une feuille de matiere cellulosique par air chaud traversant sous haut vide, dispositif de mise en oeuvre du procede et produit obtenu - Google Patents
Procede d'essorage d'une feuille de matiere cellulosique par air chaud traversant sous haut vide, dispositif de mise en oeuvre du procede et produit obtenu Download PDFInfo
- Publication number
- EP0815318B2 EP0815318B2 EP96908155A EP96908155A EP0815318B2 EP 0815318 B2 EP0815318 B2 EP 0815318B2 EP 96908155 A EP96908155 A EP 96908155A EP 96908155 A EP96908155 A EP 96908155A EP 0815318 B2 EP0815318 B2 EP 0815318B2
- Authority
- EP
- European Patent Office
- Prior art keywords
- air
- sheet
- approximately
- dryness
- dewatering
- 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 - Lifetime
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Images
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F5/00—Dryer section of machines for making continuous webs of paper
- D21F5/20—Waste heat recovery
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F5/00—Dryer section of machines for making continuous webs of paper
- D21F5/18—Drying webs by hot air
- D21F5/182—Drying webs by hot air through perforated cylinders
Definitions
- the invention relates to the spinning of a sheet of cellulosic material, particularly in the context of the manufacture of cellulose wadding or wadded fabric, ie a relatively low basis weight absorbent paper, generally creped , for sanitary or domestic use: toilet paper, towel, kitchen towel, etc.
- a process for wringing the paper sheet carried out after the forming step but before the final drying.
- the invention provides a spin at the same time by driving water in the liquid state and by evaporation resulting from the passage of a very large flow of hot air through the wet sheet conveyed by a permeable fabric.
- the method is characterized in that the flow of air through is generated by a high vacuum, between 100 and 500 millibars and created under the web scrolling through a fixed surface, along with the hot air is brought to the free surface of the sheet.
- the speed of the air is between 5 and 50 m / s.
- the method of the invention makes it possible to raise the dryness rate of the wet sheet leaving the forming section from values of the order of 8 to 25% up to values of between 20% and 75%.
- the dryness corresponds to the weight of the absolutely dry fibers compared to that of the wet fibers.
- the final rate of dryness depends on the residence time of the sheet in the flow of hot air through. This residence time can vary from 1/1000 seconds to 3/10 seconds for given values of the intensity of the flow of through air and its temperature.
- the final value of the dryness also depends, for a residence time fixed within the above limits, of the initial dryness of the sheet, the geometry of the surface traversed by the air, the flow rate of the air through which can be between 5 and 50 Nm3 / m 2 .s depending on the porosity of the sheet and the vacuum level, and also its dry and wet temperatures.
- the air is at a dry temperature between 100 and 500 ° C.
- the air is humid; and its wet temperature is between 50 and 90 ° C.
- a part of the compressed air is evacuated, and a corresponding quantity is introduced into the circuit, in order to maintain the spinning air at a humid temperature of between 50 and 90 ° C.
- the sheet is traversed by at least a second stream of hot air downstream of the first, the wet temperature is different, preferably lower.
- This splitting in the machine direction of the flow of hot air through makes it possible to optimize the thermodynamic parameters of the airflow as a function of the evolution of the dryness of the sheet. Especially when the dryness exceeds 40%, the amount of moisture in the air can be lower.
- the dryness of the sheet is increased after dewatering to a value of between about 35 and about 75%, preferably about 35 and approximately 50% by the high-vacuum dewatering means of the invention and then the sheet is dried by means of a Yankee type cylinder to a dryness of the order of 95%.
- the mechanical pressing of the sheet, supported by a felt in a conventional machine is replaced by dewatering according to the invention while setting the latter so as to obtain the same degree of dryness. Thanks to this feature of the process, a sheet of paper having a higher bulk is obtained than in the case of a conventional machine, while maintaining intact the speed performance and therefore the capacity of the machine since the level of dryness of the incoming sheet in yankee is unchanged.
- the high-vacuum dewatering of the invention is carried out to a dryness of between about 35 and about 75%.
- conveying fabric being then a canvas of the type "marker”.
- the sheet is then dried on a Yankee type cylinder.
- marker fabric it is understood a fabric comprising a weaving structure with zones of high porosity and zones of low porosity disposed according to a geometric definition determined so that it induces in the sheet a heterogeneous structure comprising zones of different compaction by the very effect of the through air dewatering of the invention.
- the dryness of the sheet, after spinning, is chosen between 35 and 75%, depending on the qualities desired for the bouffant but also for the strength of the sheet.
- a marking effect is obtained. important that increases the volume of the leaf in the most porous areas, probably because of the high vacuum prevailing under the canvas. It is also surprisingly found that the vacuum has no detrimental effect on the appearance and formation of the sheet which is kept intact while the risk of bursting is a priori high.
- the high vacuum squeezing of the invention is carried out to a dryness of between approximately 20 and approximately 45%, conveying fabric being then a canvas of the type "marker".
- the sheet is then dried on the same fabric by means of a prior art through air dryer to a dryness of between about 50 and about 90% and finally by means of a Yankee cylinder with a crepe squeegee to a dryness of the order of 95%.
- the dryness of the sheet after dewatering is increased from a value of between about 8 and about 30% to a value of between about 20 and about 45%, by said spinning method.
- the conveyor belt then being a fabric of the "marking" type and in that then the same fabric is dried by at least one drying device of the air-passing type to a dryness of about 95 %.
- At least a portion of the air supplying the distribution box is extracted from said through air type drying device.
- At least part of the air supplying the distribution box is extracted from the drying hoods of the Yankee cylinder drying device.
- metered quantities of water vapor are injected into the hot air flow before it passes through. of the sheet, particularly in the first of the spinning zones in the direction of travel of the sheet when the spinning process comprises several zones.
- This injection is modulated so as to vary the moisture content of the air along the cross-direction of the sheet, the objective being to extract different amounts of water across the sheet. This accurately controls the moisture profile of the sheet after drying and its quality.
- the invention also relates to a device for carrying out the method.
- the device is defined in accordance with the features of claim 16.
- the device also comprises an air / water separator allowing the air to be switched on by means of a compressor communicating with a heating means.
- the compressor is likely to be driven by a gas turbine group whose exhaust gas is fed to a heat exchanger for heating the air flow from the compressor before its introduction into the distribution box.
- the compressor may be composed of several compression units, and the group may also consist of several gas turbine units.
- the subject of the invention is also a sheet of paper, especially a high-bulk paper manufactured according to the high-vacuum squeezing method.
- the installation corresponding to the first embodiment for the production of absorbent paper with a basis weight of between 12 and 80 g / m 2 comprises in its wet part a section for forming the sheet which can be of any type known to man. of career.
- it comprises a double fabric 11 and 12 between the convergent interval from which a jet of dough is injected from a headbox 13. After draining bringing the sheet to a dryness of 8 to 25%, this last is driven to a means 15 which ensures its transfer to a permeable canvas.
- This fabric can be simple or "marker" type according to the manufacturing process that is implemented.
- the wet sheet is conveyed to the dewatering device 16 from which it leaves freed, for the most part, its water.
- the dryness rate of the sheet is then between 25 and 75%.
- the fabric then drives it to a drying cylinder 18 provided with drying hoods of the type known as Yankee on which it is applied by means of a suitable adhesive.
- the sheet passes under the drying hoods and is peeled off by means of a doctor blade so as to crepe it, as is well known.
- the wiper device 16 consists of a rotating cylinder 19 mounted on a horizontal axis.
- the surface of the cylinder is porous with a high opening rate.
- An internal volume space 20, forming a recovery box is delimited by a fixed cover 21, covering a sector of the cylinder, and the complementary sector thereto. It is in communication via a conduit 22 with a vacuum source. It is also in communication, by the sector of its surface not closed by the cover 21, with one or more boxes 24 of hot air distribution which are arranged outside the cylinder and which have openings in the form of sectors of circle parallel to its wall. These openings are provided with means of equalizing the air flow, such as fins or other equivalent means, so that it approaches the sheet with a uniform speed over the entire surface.
- the boxes 24 are supplied with hot air by a compressor 26 driven by a motor 27, for example electric.
- the compressor can be of any suitable type, axial or centrifugal.
- the air coming from the compressor is heated to the desired temperature by a heating means which in the example shown is a burner 28.
- the duct 30 connecting the compressor to the burner 28 comprises a bypass 34 provided with a valve 31 controlling the air extraction from the circuit.
- an opening 33 with variable rate air introduction means 32 makes it possible to compensate the air extracted by the opening 34, and to form a mixture with the residual compressed air, coming from the duct 30, before reheating thereof by the burner 28.
- the quantities of fresh air and extracted air can be controlled by an appropriate control member according to the humidity rate of the air inside the chambers 24 Similarly a control loop controls the flow of fuel to the burner 28 as a function of the temperature of the air at the distribution boxes 24.
- the duct 22 is connected to a separating apparatus 23 of the cyclone or other type so that water drops suspended in the air can be removed from the circuit.
- This separator may be external to the wiper device as shown. However, it is also within the scope of the invention to achieve the separation water / air at the outlet of the air, immediately downstream of the wet sheet of paper, for example by means of baffles, provided with gutters, disposed across the flow in the input area of the enclosure 20. This embodiment is not shown. Water collected in the separator is pumped to atmospheric pressure. The dehumidified air leaving the separator is led to the inlet of the compressor 26 to be compressed again at a pressure slightly above atmospheric pressure, and used for spinning.
- the dewatering device operates as follows: the wet sheet on the fabric 17 is driven around the cylinder 19 and passes under the hot air outlet nozzles of the caissons 24.
- the strong depression prevailing in the enclosure generated by the suction of the compressor 26 and set to a value between 100 and 500 millibars, then forces the flow of air from the boxes to thus pass through the sheet at a high speed. This speed is preferably between 5 and 50 m / s.
- the water is extracted from the sheet partly by evaporation, partly in the form of aerosols.
- the separator was disposed at a distance from the well 20 selected so that water suspended in liquid air settles at its level before it evaporates into the air stream.
- the saturated air, extracted under vacuum from the separator is compressed by the compressor at a pressure slightly above atmospheric pressure.
- the temperature of the air at the outlet of the heater is set between 100 ° C. and 500 ° C., and its humid temperature is maintained between 50 ° C. and 90 ° C. by appropriately adjusting the quantity of air extracted from the heating circuit. and that of fresh air brought in 33.
- each circuit comprising: a distribution box, a recovery box with its suction slot, a compression means and a means for reheating the air reintroduced into the distribution box.
- the purpose is to allow the adjustment of the thermodynamic conditions of the air, in particular its wet temperature, by adjusting the individual fresh air introduction means to each loop.
- the spinning fabric 17 which can be marking conveys the wet sheet. through a set of two fixed boxes 120 and 124: a sucking suction chamber 120 side spin screen which determines the suction surface through which the leaf is drained, and a box 124 hot air distribution located on the side of the wet sheet.
- the two boxes are arranged at a short distance from each other.
- the fabric 17 is guided in the gap thus formed between the two boxes so that the wet sheet is on the side of the box through which the hot air is brought.
- the fabric is itself supported by rollers 121, for example, or slides on a plate provided with slots.
- the air is brought to a speed of 5 to 50 m / s because of the depression prevailing in the casing 124, and passes successively through the wet sheet and the porous fabric from which it extracts the desired amount of moisture.
- the drive of the compressor 26 is provided by a gas turbine unit 126.
- a gas turbine unit 126 This comprises, in a manner known per se, a compressor 126 C whose rotor shaft is driven by a turbine 126 T placed in motion by the gases from a combustion chamber itself supplied with combustion air by the compressor.
- the turbine also drives a shaft connected by a coupling to that of the compressor 26.
- the gases from the turbine are at a sufficient temperature, of the order of 500 ° C, to serve as a heat source in the present spin device .
- the means for heating the air coming from the compressor 26 is constituted by a heat exchanger 128.
- FIG. 4 shows a fourth embodiment of the invention in which the path of the wet sheet is arranged between the high vacuum dewatering device 16 and the Yankee drying cylinder, at least a conventional through air type dryer 140 comprising a cylinder 142 rotatably mounted about a horizontal axis. Its wall is porous and supports the fabric 17. Air heated by a burner 146 is driven through the wet sheet applied to the fabric 17, by means of a circulation fan 144. In the feed circuit air dryer, there is provided a burner as is known.
- the wet paper sheet is transferred from the forming fabric to the fabric 17, its dryness level is then between 8 and 30% approximately. It undergoes a high-vacuum squeezing through the device 16 of the invention from which it results with a degree of dryness of between 20 and 45%. It then passes into the dryer 140 where it undergoes drying increasing its dryness to a level between 50 and 90%. The sheet is then applied to a Yankee drying cylinder 18 where it is dried to a dryness of the order of 95%. The dried sheet is peeled off the cylinder by means of a crepe squeegee as is known when making a creped product.
- FIG. 4 is a block diagram that does not represent all the elements necessary for operation in practice, such as in particular the use of additional systems or conveyor cloths.
- the process was tested on a commercial paper towel sheet, made of cellulose wadding or creped wadding, such as that marketed under the trademark O'KAY. It was moistened by spraying measured quantities of water.
- the pilot machine comprises a flat support, provided with a vacuum slot, on which moves an air permeable grid.
- the speed of the gate can be set to a specified setpoint.
- a heated air nozzle is disposed above the grid at the vacuum gap. The latter communicates with a vacuum source set at 250 mbar.
- the supply air of the nozzle was at ambient conditions (20 ° C and 5 g of steam per kg of dry air)
- the air was preheated to 200 ° C and highly humidified.
- the measured wet temperature was 64 ° C (120 g of steam per kg of dry air).
- Tests were carried out on a pilot paper machine of small width, comprising a training section with training cloth, a transfer means on a marker-type cloth, an airtraversant drying section which can be bypassed, a drying cylinder Yankee type with a transfer press.
- a spinning / drying section in accordance with the invention, has been placed at the level of the marker fabric.
- the entire device corresponded schematically to that of FIG.
- Tissue paper production tests were carried out on the previous pilot paper machine with marker fabric. For these tests, the products manufactured had substantially all the same basis weight and fiber composition. They were all dried and creped on the yankee to the same dryness, 95%. The dryness at the yankee inlet and the bulk (cm3 / g) of the sheet after creping were measured.
- Second series of tests (2) The spinning device of the invention alone was used, by adjusting the time and humidity parameters of the air so that the sheet has a dryness at the entry of the Yankee 50 %.
- the method of the invention makes it possible to better conform the fibers to the geometry of the marker fabric because the fibers are warmer and therefore more flexible than in a vacuum box of the prior art of which the air is at room temperature.
- the fibers are further dried more vigorously after being shaped by the high vacuum.
- the structure is stabilized earlier with a lower average humidity.
- the sheet can thus be bonded to the wall of the Yankee drying cylinder with a lower dryness than in the case of conventional through-air drying, obtaining the same swelling.
- FIG. 9 shows the drying part of a paper machine, incorporating a conventional through air dryer 101, with a porous-wall rotary cylinder 102 and the air-blast hoods 103.
- a wire 104 of the marker type, for example, supports the sheet from the forming section, and is driven through the dryer, around the cylinder. 102.
- the suction slot is open on the side of the web 104 opposite the sheet.
- the box 105 is in communication with a source of high vacuum, between 100 and 500 mbar.
- the present return box is in communication, on the suction side, with a hot air distribution box 106.
- the dry temperature of the The air is between 100 and 500 ° C. Its humid temperature is between 50 and 90 ° C.
- the humidity level of this air is modulated in the cross direction. Indeed, as has been shown above, the efficiency of the water spinning liquid form of the sheet by the device is even higher than the moisture content carried by the air flow hot through is higher. This property is used to modulate the residual moisture profile of the sheet in the cross direction.
- the well 106 has been divided into a large number of smaller, adjacent chambers 106 'by means of partition walls disposed across the well 106 at regular intervals.
- a ramp 107 for steam injection preferably superheated, has been placed inside each box 106 '.
- Each ramp is supplied with steam from a manifold via a valve 107 'whose opening is controlled according to the set value depending on the desired dryness for the corresponding area of the sheet.
Landscapes
- Paper (AREA)
- Polysaccharides And Polysaccharide Derivatives (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9503220 | 1995-03-20 | ||
FR9503220A FR2732044B1 (fr) | 1995-03-20 | 1995-03-20 | Procede d'essorage d'une feuille de matiere cellulosique par air chaud traversant sous haut vide |
PCT/FR1996/000414 WO1996029467A1 (fr) | 1995-03-20 | 1996-03-20 | Procede d'essorage d'une feuille de matiere cellulosique par air chaud traversant sous haut vide, dispositif de mise en ×uvre du procede et produit obtenu |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0815318A1 EP0815318A1 (fr) | 1998-01-07 |
EP0815318B1 EP0815318B1 (fr) | 2001-11-28 |
EP0815318B2 true EP0815318B2 (fr) | 2006-12-20 |
Family
ID=9477201
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP96908155A Expired - Lifetime EP0815318B2 (fr) | 1995-03-20 | 1996-03-20 | Procede d'essorage d'une feuille de matiere cellulosique par air chaud traversant sous haut vide, dispositif de mise en oeuvre du procede et produit obtenu |
Country Status (12)
Country | Link |
---|---|
US (1) | US5974691A (pt) |
EP (1) | EP0815318B2 (pt) |
JP (1) | JP4008026B2 (pt) |
AT (1) | ATE209725T1 (pt) |
BR (1) | BR9607865A (pt) |
CA (1) | CA2202172C (pt) |
DE (1) | DE69617406T3 (pt) |
EA (1) | EA000216B1 (pt) |
ES (1) | ES2168465T5 (pt) |
FR (1) | FR2732044B1 (pt) |
PT (1) | PT815318E (pt) |
WO (1) | WO1996029467A1 (pt) |
Families Citing this family (32)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA2234305A1 (en) * | 1997-04-03 | 1998-10-03 | Fort James Corporation | High-intensity through-air-drying for conversion of conventional wet-press paper machines |
US5988030A (en) * | 1997-09-19 | 1999-11-23 | Kimberly-Clark Worldwide, Inc. | Apparatus for penetrating a sheet material web carried on a fabric |
FI110622B (fi) * | 1998-04-30 | 2003-02-28 | Metso Paper Inc | Menetelmä ja laite jenkkisylinterin kattavan huuvan kuivatuskapasiteetin parantamiseksi |
ID26795A (id) * | 1998-07-01 | 2001-02-08 | Procter & Gamble | Proses untuk menghilangkan air dari jaringan berserat memakai getaran tumbukan aliran gas yang berlawanan |
US6631566B2 (en) * | 2000-09-18 | 2003-10-14 | Kimberly-Clark Worldwide, Inc. | Method of drying a web |
FR2825418B1 (fr) * | 2001-05-31 | 2004-07-16 | Oreal | Pompe a membrane, et recipient ainsi equipe |
US6551461B2 (en) | 2001-07-30 | 2003-04-22 | Kimberly-Clark Worldwide, Inc. | Process for making throughdried tissue using exhaust gas recovery |
US6732452B2 (en) * | 2001-12-21 | 2004-05-11 | Kimberly-Clark Worldwide, Inc. | Apparatus and process for throughair drying of a paper web |
US6869506B2 (en) * | 2002-11-22 | 2005-03-22 | Metso Paper Karlstad Aktiebolag (Ab) | Apparatus for dewatering a paper web and associated system and method |
AT412484B (de) * | 2003-04-29 | 2005-03-25 | Andritz Ag Maschf | Vorrichtung zum trocknen einer papierbahn |
US6904700B2 (en) * | 2003-09-12 | 2005-06-14 | Kimberly-Clark Worldwide, Inc. | Apparatus for drying a tissue web |
DE10351623A1 (de) | 2003-11-05 | 2005-06-16 | Voith Paper Patent Gmbh | Anordnung zur Herstellung oder/und Behandlung von Bahn- oder Blattmaterial |
US6910283B1 (en) * | 2003-12-19 | 2005-06-28 | Kimberly-Clark Worldwide, Inc. | Method and system for heat recovery in a throughdrying tissue making process |
US6953516B2 (en) * | 2004-01-16 | 2005-10-11 | Kimberly-Clark Worldwide, Inc. | Process for making throughdried tissue by profiling exhaust gas recovery |
US7861437B2 (en) * | 2006-02-27 | 2011-01-04 | Metso Paper Usa, Inc. | System and method for mixing distinct air streams |
US7716850B2 (en) * | 2006-05-03 | 2010-05-18 | Georgia-Pacific Consumer Products Lp | Energy-efficient yankee dryer hood system |
DE102006062234A1 (de) * | 2006-12-22 | 2008-06-26 | Voith Patent Gmbh | Verfahren und Vorrichtung zur Trocknung einer Faserstoffbahn |
DE102007006960A1 (de) * | 2007-02-13 | 2008-08-14 | Voith Patent Gmbh | Vorrichtung zur Trocknung einer Faserstoffbahn |
US7803248B2 (en) * | 2007-05-23 | 2010-09-28 | Johns Manville | Method of drying mat products |
TR200703816A2 (tr) * | 2007-06-04 | 2009-02-23 | Hayat K�Mya Sanay� Anon�M ��Rket� | Temizlik kağıdı üretiminde bir kojenerasyon uygulaması |
DE102012109878B4 (de) * | 2012-10-17 | 2015-04-02 | Trützschler GmbH & Co Kommanditgesellschaft | Trockner für eine textile Warenbahn |
CN103243606A (zh) * | 2013-04-07 | 2013-08-14 | 苏州市建诚装饰材料有限公司 | 一种自动变温鼓风干燥箱 |
US8801902B1 (en) * | 2013-09-18 | 2014-08-12 | Usg Interiors, Llc | Water reduction by modulating vacuum |
JP5728556B2 (ja) * | 2013-10-18 | 2015-06-03 | ユニ・チャーム株式会社 | 不織布の嵩回復装置 |
FR3030705A1 (fr) * | 2014-12-17 | 2016-06-24 | Andritz Perfojet Sas | Installation de sechage d'un voile de non-tisse humide |
KR20170109912A (ko) * | 2016-03-22 | 2017-10-10 | 삼성에스디아이 주식회사 | 극판 건조 장치 |
EP3260802B1 (en) * | 2016-06-23 | 2019-10-09 | Valmet Technologies Oy | Nozzle for a device for contact-free treatment of a running fiber web |
US10094614B2 (en) * | 2016-12-14 | 2018-10-09 | Usg Interiors, Llc | Method for dewatering acoustical panels |
CN107881832A (zh) * | 2017-11-03 | 2018-04-06 | 绥阳县双龙纸业有限公司 | 一种用于造纸的压榨装置 |
GB2589786B (en) | 2018-06-27 | 2022-11-30 | Kimberly Clark Co | Through-air drying apparatus and methods of manufacture |
US11118311B2 (en) * | 2018-11-20 | 2021-09-14 | Structured I, Llc | Heat recovery from vacuum blowers on a paper machine |
SE2230068A1 (en) * | 2022-03-10 | 2022-11-15 | Valmet Oy | A machine for producing a fibrous web |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
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GB1127766A (en) * | 1964-10-27 | 1968-09-18 | Pulp Paper Res Inst | Drying process |
US3432936A (en) * | 1967-05-31 | 1969-03-18 | Scott Paper Co | Transpiration drying and embossing of wet paper webs |
US3447247A (en) * | 1967-12-18 | 1969-06-03 | Beloit Corp | Method and equipment for drying web material |
US3913241A (en) * | 1969-06-25 | 1975-10-21 | Unisearch Ltd | Apparatus for drying textile materials |
US4146361A (en) * | 1972-09-07 | 1979-03-27 | Cirrito Anthony J | Apparatus for hot gas heat transfer particularly for paper drying |
US4481722A (en) * | 1982-06-23 | 1984-11-13 | Kimberly-Clark Corporation | System for protecting a rotary dryer from thermal stress |
JPH01501490A (ja) * | 1986-02-04 | 1989-05-25 | ベロイト・コーポレイション | 水蒸気ボックス用制御弁 |
FI95731C (fi) * | 1991-11-05 | 1996-03-11 | Valmet Paperikoneet Oy | Keksintö kohdistuu menetelmään ja laitteeseen paperirainan lepatuksen estämiseksi paperikoneen kuivatusosalla sen kahden yksiviiravientiryhmän välillä |
-
1995
- 1995-03-20 FR FR9503220A patent/FR2732044B1/fr not_active Expired - Fee Related
-
1996
- 1996-03-20 EP EP96908155A patent/EP0815318B2/fr not_active Expired - Lifetime
- 1996-03-20 EA EA199700163A patent/EA000216B1/ru not_active IP Right Cessation
- 1996-03-20 BR BR9607865A patent/BR9607865A/pt not_active IP Right Cessation
- 1996-03-20 AT AT96908155T patent/ATE209725T1/de active
- 1996-03-20 DE DE69617406T patent/DE69617406T3/de not_active Expired - Lifetime
- 1996-03-20 WO PCT/FR1996/000414 patent/WO1996029467A1/fr active IP Right Grant
- 1996-03-20 CA CA002202172A patent/CA2202172C/fr not_active Expired - Lifetime
- 1996-03-20 ES ES96908155T patent/ES2168465T5/es not_active Expired - Lifetime
- 1996-03-20 JP JP52813596A patent/JP4008026B2/ja not_active Expired - Lifetime
- 1996-03-20 US US08/913,627 patent/US5974691A/en not_active Expired - Lifetime
- 1996-03-20 PT PT96908155T patent/PT815318E/pt unknown
Also Published As
Publication number | Publication date |
---|---|
FR2732044A1 (fr) | 1996-09-27 |
PT815318E (pt) | 2002-05-31 |
DE69617406T2 (de) | 2002-04-04 |
EP0815318A1 (fr) | 1998-01-07 |
FR2732044B1 (fr) | 1997-04-30 |
EP0815318B1 (fr) | 2001-11-28 |
JPH11502270A (ja) | 1999-02-23 |
ATE209725T1 (de) | 2001-12-15 |
DE69617406T3 (de) | 2007-06-14 |
ES2168465T3 (es) | 2002-06-16 |
CA2202172C (fr) | 2008-08-26 |
BR9607865A (pt) | 1998-06-30 |
DE69617406D1 (de) | 2002-01-10 |
JP4008026B2 (ja) | 2007-11-14 |
CA2202172A1 (fr) | 1996-09-26 |
WO1996029467A1 (fr) | 1996-09-26 |
US5974691A (en) | 1999-11-02 |
EA199700163A1 (ru) | 1998-02-26 |
ES2168465T5 (es) | 2007-07-01 |
EA000216B1 (ru) | 1998-12-24 |
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