US2952033A - Apparatus for annealing filamentary tow - Google Patents

Apparatus for annealing filamentary tow Download PDF

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Publication number
US2952033A
US2952033A US690582A US69058257A US2952033A US 2952033 A US2952033 A US 2952033A US 690582 A US690582 A US 690582A US 69058257 A US69058257 A US 69058257A US 2952033 A US2952033 A US 2952033A
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US
United States
Prior art keywords
tow
rolls
annealing
filaments
relaxing
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
Application number
US690582A
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English (en)
Inventor
Chester H Goodwin
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.)
Solutia Inc
Original Assignee
Chemstrand Corp
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
Priority to BE572086D priority Critical patent/BE572086A/xx
Priority to NL230605D priority patent/NL230605A/xx
Priority to NL101666D priority patent/NL101666C/xx
Priority to US690582A priority patent/US2952033A/en
Application filed by Chemstrand Corp filed Critical Chemstrand Corp
Priority to GB26518/58A priority patent/GB890559A/en
Priority to CH6345158A priority patent/CH368576A/de
Priority to DK350558AA priority patent/DK114642B/da
Priority to FR776229A priority patent/FR1215671A/fr
Priority to DE19581410370 priority patent/DE1410370A1/de
Application granted granted Critical
Publication of US2952033A publication Critical patent/US2952033A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B13/00—Machines and apparatus for drying fabrics, fibres, yarns, or other materials in long lengths, with progressive movement
    • F26B13/001—Drying and oxidising yarns, ribbons or the like
    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
    • D02G1/00—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics
    • D02G1/02—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics by twisting, fixing the twist and backtwisting, i.e. by imparting false twist
    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02J—FINISHING OR DRESSING OF FILAMENTS, YARNS, THREADS, CORDS, ROPES OR THE LIKE
    • D02J1/00—Modifying the structure or properties resulting from a particular structure; Modifying, retaining, or restoring the physical form or cross-sectional shape, e.g. by use of dies or squeeze rollers
    • D02J1/22—Stretching or tensioning, shrinking or relaxing, e.g. by use of overfeed and underfeed apparatus, or preventing stretch
    • D02J1/229—Relaxing
    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02J—FINISHING OR DRESSING OF FILAMENTS, YARNS, THREADS, CORDS, ROPES OR THE LIKE
    • D02J13/00—Heating or cooling the yarn, thread, cord, rope, or the like, not specific to any one of the processes provided for in this subclass
    • D02J13/005—Heating or cooling the yarn, thread, cord, rope, or the like, not specific to any one of the processes provided for in this subclass by contact with at least one rotating roll
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M13/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment
    • D06M13/52—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment combined with mechanical treatment
    • D06M13/53—Cooling; Steaming or heating, e.g. in fluidised beds; with molten metals
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M23/00—Treatment of fibres, threads, yarns, fabrics or fibrous goods made from such materials, characterised by the process
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S264/00—Plastic and nonmetallic article shaping or treating: processes
    • Y10S264/28—Stretching filaments in gas or steam

Definitions

  • This invention relates to an apparatus for annealing filamentary material and more particularly to a method and apparatus for heat-relaxing or relieving the internal strains in filamentary material for instance, textile filaments or fibers formed from synthetic material, such as acrylonitrile polymers or the like.
  • the freshly formed filaments produced by the spinning operation are subjected to an orientation treatment such as heat-stretching or the like.
  • This orientation treatment aligns the filament molecules in the direction of the filament axis and alters the physical characteristics of the filaments in many ways including the vital feature of increasing the tensile strength of the filaments to the degree necessary to permit commercial use.
  • this heat-stretching operation also leaves the filaments in an internally strained condition and if this strained condition is not relieved fibrillation will result, that is, the splitting off from the filaments of longitudinal sections or fibrils of material during the application of stress usually in the form of abrasion.
  • the stretched filaments have a high residual shrinkage capacity and tend to shrink on subsequent heating at elevated temperatures. Furthermore, as a result of the stretching operation, the filament extensibility is decreased limiting its use in such textile operations as knitting and weaving where a high extensibility is desired.
  • the filaments tend to discolor to such an extent that the white end product is difiicult to obtain.
  • a primary object of this invention is to provide a new and novel apparatus for heat-relaxing or annealing internally strained filamentary material.
  • Another object of this invention is to provide a new and novel apparatus for annealing filamentary material such as textile filaments formed from acrylonitrile polymers and the like which reduces or substantially eliminates the tendency of the filaments to discolor and consequenlty produces a relatively white, annealed textile product.
  • filamentary material such as textile filaments formed from acrylonitrile polymers and the like which reduces or substantially eliminates the tendency of the filaments to discolor and consequenlty produces a relatively white, annealed textile product.
  • a further object of this invention is to provide a new and novel apparatus for annealing filamentary material such as a tow of synthetic filaments formed from acrylonitrile polymers and the like which operates in a highly efiicient continuous manner on a tow of indefinite length.
  • Still another object of this invention is to provide apparatus for annealing synthetic filamentary material such as that formed from acrylonitrile polymers and the ments while in a relaxed condition so that the strains are relieved.
  • annealing of filamentary material can be accomplished by placing large batches of material in suitable containers.
  • the containers can then be placed in autoclaves or similar chambers so that the material can be subjected to a heating medium such as steam.
  • a heating medium such as steam.
  • the material is elevated to the desired annealing temperature while in a relaxed state in the container.
  • Another object of this invention is to provide a new and improved apparatus for heat-relaxing or annealing of heat-stretched filamentary material.
  • a still further object of this invention is to provide a new and improved apparatus for annealing filamentary material which momentarily subjects successive portions of the material to a heating medium in accurately controlled quantities and which permits a predetermined degree of annealing to be easily carried out.
  • This invention further contemplates the provision of a new and novel apparatus for producing filaments formed from acrylonitrile polymers and the like which have a controlled residual shrinkage capacity and improved textile processing characteristics.
  • the objects of the invention are accomplished by providing a continuous rope or tow of filamentary material such as material formed from acrylonitrile
  • the tow is directed into means for advancing the tow such as a pair of cooperating processing rolls, one of which continuously subjects the tow to a heating medium as it passes between the nip of the rolls and thereby raises the tow to a predetermined
  • a second pair of rolls which may be conventional take-up rolls, is arranged in spaced relationship with the first pair of processing rolls so that the heated tow moves into the take-up rolls and is discharged therefrom.
  • the take-up rolls are preferably rotated at a somewhat slower speed thanthe processing rolls so that the tow is suspended therebetween in a drooping or relaxed condition within what may be defined as a relaxing area.
  • the tow moving through the pairs of rolls is successively heated and then permitted to relax, relieving the strained filaments and producing an annealed tow.
  • additional processing rolls may be provided through which the tow passes successively so that additional relaxing areas are provided between adjacent pairs of rolls in order to obtain the degree of annealing desired.
  • Figure 1 is a diagrammatic side view of the annealing apparatus of the invention
  • Figure 2 is a longitudinal view partially in section of the heating roll of the apparatus of Figure 1;
  • Figure 3 is a sectional view taken substantially along line 33 of Figure 2 in the direction of the arrows;
  • Figure 4 is a diagrammatic side view of a modification of the invention.
  • the material comprises an elongated bundle or tow containing a plurality of fibers or continuous filaments.
  • the tow may be of any fibrous or filamentary material it preferably consists of continuous filaments formed from a synthetic material such as acrylonitrile polymers or the like.
  • synthetic filaments of the acrylic type are usually oriented following their formation, such as by stretching, to impart certain desirable qualities to the filaments, such as increasing their tensile strength. This stretching leaves the filaments in an internally strained condition with such undesirable qualities as a high residual shrinkage capacity and increased fibrillation.
  • the stretched filaments therefore must be heatrelaxed or annealed to relieve these internal strains or stresses and novel means have been provided in this invention for performing a heat-relaxing operation on a filamentary tow of such acrylic material.
  • advancing means are provided as shown in Figure 1, such as a pair of processing rolls designated generally by the numerals 11, 12, which are arranged in cooperating relationship to move filamentary material such as the tow 10 in the direction of arrow H.
  • the tow preferably comprises a bundle of continuous filaments formed from acrylic material by any conventional spinning operation.
  • the rolls 11, 12 are driven in opposite direction by any suitable means (not shown) so as to move the tow 10 continuously at a uniform rate of speed.
  • the lower roll 12 In order to raise the tow 110 to a predetermined annealing temperature, means have been provided in the lower roll 12 for directing a heating medium into the tow as it moves through the nip of the rolls designated generally by the numeral '14. More specific-ally, the lower roll 12 contains a central bore 16, as shown best in Figures 2, 3, and a plurality of radial ports or passages 17 in its peripheral wall 18. The ports 17 are preferably arranged in a plurality of circumferentially spa ed r ws in, the roll all 18 and adjacent rows are positioned in staggered relationship as shown in Figure 2.
  • a stationary cylindrical tube or tank 19 is centrally positioned within the roll bore 16 by means such as bearings 21 and is arranged to be supplied with a heating medium such as steam through a pipe or conduit 22 connected to a suitable source (not shown).
  • a longitudinal slot 23 is provided within the wall of the tank 19 in a plane defined by the axes of the rolls 11 and 12 and is arranged to communicate with the spaced ports 17 in each row or rows successively as the roll 12 is rotated.
  • the tank 19 is preferably constructed so as to provide a relatively close fit between its outer peripheral wall and the bore 16 of the roll 12. Thus the heating medium will flow substantially through only the ports presented to the slot 23.
  • the tank 19 is positioned so that the slot 23 communicates with a single row of ports 17 only when the outer or outlet end of the ports are in sub stantial alignment with the nip 14 of the rolls 11, 12 and the remaining ports are closed by the peripheral wall of the tank 19.
  • slots or the like may be employed instead of ports or the ports may be arranged in any desired pattern without departing from the spirit of the invention.
  • the upper roll 11 which is preferably formed of steel or the like, is provided with the layer 24 of resilient material such as neoprene rubber or the like secured in any suitable manner to its outer periphery ( Figure l).
  • the resilient layer 24 is arranged to resiliently engage the tow 10 as it moves through the nip 14 and confine the heating medium flowing out of ports 17 into the tow. This assists in raising the tow to the desired annealing temperature rapidly as successive portions of the tow are exposed to the heating medium for only a relatively short period of time,
  • means such as a pair of take-up rolls 26, 27 are positioned in spaced relationship with the processing rolls 11, 12 and engage the tow 10 in the conventional manner as shown so as to continuously take up the tow as it advances in the direction ofthe arrow H.
  • the rolls '26, '27 may be of any suitable construction.
  • Means have also been provided to relax the tow 1t) heated in the rolls 11, 12. More specifically, the reach of the tow 10 between the processing rolls 11, 12 and the take-up rolls 26, 27 is of such length as to provide a relaxing area designated generally by the numeral 28 which permits the internal strains within the tow to be substantially relieved. It can be seen by reference to Figure 1 that the tow is suspended between the processing and take-up rolls in a sagging or drooping condition so that successive portions of the tow heated within the processing rolls 11, 12 may relax freely in the area 28.
  • the filamentary tow 10 which has been previously placed in a strained condition such as by a stretching operation moves into the processing rolls 11, 12.
  • a strained condition such as by a stretching operation
  • the annealed tow then moves through the take-up rolls 26, 27 to a suitable collection point at which it may be baled or otherwise treated.
  • the tow is heated successively by a plurality of processing rolls shown in the embodiment of Figure 4 as three pairs of processing rolls 31, 32; 33, 34; 36, 37 each substantially identical in construction and operation to the processing rolls 11, 12 of Figure 1.
  • Three successive relaxing areas 38, 39 and 41 are therefore provided each of which are operatively identified with a pair of processing rolls and when the tow leaves the last relaxing area 41 it is taken up by a pair of take-up rolls 42, 43 as shown in the embodiment of Figure 1.
  • strain relief of the tow 10 is obtained and as many pairs of processing rolls may be employed as desired to provide the necessary number of relaxing areas for bringing the tow to the desired final state.
  • the amount of sag in the tow reach in each of the relaxing areas 38, 39, 41 decreases as the tow is processed.
  • the droop of the tow can be reduced in the later stages by reducing the speed diiferential between adjacent pairs of rolls as the amount of relaxation required for each subsequent annealing step decreases during the progress of the tow through the apparatus of Figure 1.
  • the apparatus disclosed in Figures 1-4 is particularly adaptable to a continuous type of tow processing operation which constitutes one of the desirable features of the invention.
  • the apparatus of the invention In a textile filament producing operation the apparatus of the invention would be located directly after the filament stretching devices to give a smooth flow of work.
  • Means, therefore, may be provided for preliminary heating of the tow such as a steam conditioner designated generally by the numeral 44 and shown diagrammatically by Figure 4.
  • the tow is carried through the steam conditioner after leaving the stretching devices (not shown) and before entering the processing rolls so that the temperature of the tow is initially raised with the addition of moisture thereto by means of the steam.
  • One of the outstanding features of this invention is the relatively short period of time at which the tow is held at the annealing temperature. Heat is applied to the tow only momentarily at the nip of the processing rolls and is permitted to cool rapidly in the relaxing area. As is well known, this means that a whiter product is obtained, considerably enhancing its value as the fila ments are not permitted to acquire the characteristic yellow hue common to acrylic material when it has been subjected to sustained periods of heat application.
  • Another outstanding feature of the invention is its simplicity of construction and operation which enables uncrimped tow to be processed at a high speed without interrupting the flow of work in a production line. No complicated or expensive apparatus is required and the directing of steam into the tow is accomplished in a simple manner.
  • the annealing operation may be accomplished in a plurality of successive annealing steps so that complete strain relief of the filaments may be obtained and the residual shrinkage capacity of the fibers is thereby reduced to an absolute minimum.
  • An apparatus for annealing a tow of filamentary material comprising a first roll having a central bore and a plurality of longitudinal rows of ports extending radially from the bore outward through the roll, a second roll engaging the first roll, said rolls being adapted for rotation to advance a tow therebetween, and a stationary cylindrical tank positioned in the bore in the first roll for containing a heating medium and having a longitudinal slot lying in a plane defined by the axes of the rolls so as to direct said heating medium into the longitudinal row of ports leading to the nip of the rolls for heating the tow, said second roll having therearound a layer of resilient material adapted to cooperate with the first roll to prevent escape of the heating medium from the tow.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
US690582A 1957-10-16 1957-10-16 Apparatus for annealing filamentary tow Expired - Lifetime US2952033A (en)

Priority Applications (9)

Application Number Priority Date Filing Date Title
BE572086D BE572086A (fr) 1957-10-16
NL230605D NL230605A (fr) 1957-10-16
NL101666D NL101666C (fr) 1957-10-16
US690582A US2952033A (en) 1957-10-16 1957-10-16 Apparatus for annealing filamentary tow
GB26518/58A GB890559A (en) 1957-10-16 1958-08-18 Method of annealing synthetic organic filamentary material and apparatus therefore
CH6345158A CH368576A (de) 1957-10-16 1958-08-30 Vorrichtung zum kontinuierlichen Herstellen oder Behandeln von Fäden
DK350558AA DK114642B (da) 1957-10-16 1958-09-29 Apparat til fixering af fibermateriale.
FR776229A FR1215671A (fr) 1957-10-16 1958-10-08 Procédé et appareil pour supprimer les tensions internes dans les filaments ou fibres textiles synthétiques
DE19581410370 DE1410370A1 (de) 1957-10-16 1958-10-15 Verfahren und Vorrichtung zur Waermebehandlung von fadenartigem Material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US690582A US2952033A (en) 1957-10-16 1957-10-16 Apparatus for annealing filamentary tow

Publications (1)

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US2952033A true US2952033A (en) 1960-09-13

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US690582A Expired - Lifetime US2952033A (en) 1957-10-16 1957-10-16 Apparatus for annealing filamentary tow

Country Status (8)

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US (1) US2952033A (fr)
BE (1) BE572086A (fr)
CH (1) CH368576A (fr)
DE (1) DE1410370A1 (fr)
DK (1) DK114642B (fr)
FR (1) FR1215671A (fr)
GB (1) GB890559A (fr)
NL (2) NL230605A (fr)

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3061886A (en) * 1960-08-12 1962-11-06 Ibm Method for producing a form-retaining roll of extensible tape
US3101245A (en) * 1960-08-18 1963-08-20 American Cyanamid Co Production of polyacrylonitrile fibers
US3149930A (en) * 1960-12-01 1964-09-22 Hans J Behncke Drum drying apparatus
US3166822A (en) * 1960-04-26 1965-01-26 English Rose Ltd Method and apparatus for production of bulked yarn
US3184821A (en) * 1961-06-29 1965-05-25 Celanese Corp Treatment of filamentary material
US3191224A (en) * 1962-05-31 1965-06-29 Dow Chemical Co Flexibilizing rigid foams
US3222799A (en) * 1962-03-22 1965-12-14 Monsanto Co Apparatus for treating filaments
US3245109A (en) * 1961-09-06 1966-04-12 Scragg & Sons Apparatus for drawing a branched filament
US3293719A (en) * 1961-10-03 1966-12-27 Mitsubishi Reiyon Kabushiki Ka Apparatus for producing high bulk fibrous material
US3313002A (en) * 1965-08-04 1967-04-11 Du Pont Apparatus for heat treating sheet material
US3491178A (en) * 1964-02-04 1970-01-20 Mitsubishi Rayon Co Method for spinning bicomponent polypropylene filaments
US3679791A (en) * 1970-02-20 1972-07-25 Ici Ltd Process for shrinking film
US3917783A (en) * 1973-08-22 1975-11-04 Northrop Corp Method for strengthening boron filaments for use in forming filamentary composites
US4068998A (en) * 1975-08-21 1978-01-17 Enrico Attucci Apparatus for processing continuously-fed plastics material
US4115562A (en) * 1975-06-30 1978-09-19 Phillips Petroleum Company Treated fabrics and process
US6106447A (en) * 1997-02-07 2000-08-22 Voith Sulzer Papiermaschinen Gmbh Press jacket and roll with a press jacket of this kind

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2497212A (en) * 1945-10-31 1950-02-14 Alfonso M Donofrio Method of manufacturing capsules
US2697023A (en) * 1950-04-29 1954-12-14 Eastman Kodak Co Spinning acrylonitrile
US2775507A (en) * 1952-01-10 1956-12-25 British Celanese Manufacture of filamentary material from copolymers of acrylonitrile and vinylidene chloride

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2497212A (en) * 1945-10-31 1950-02-14 Alfonso M Donofrio Method of manufacturing capsules
US2697023A (en) * 1950-04-29 1954-12-14 Eastman Kodak Co Spinning acrylonitrile
US2775507A (en) * 1952-01-10 1956-12-25 British Celanese Manufacture of filamentary material from copolymers of acrylonitrile and vinylidene chloride

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3166822A (en) * 1960-04-26 1965-01-26 English Rose Ltd Method and apparatus for production of bulked yarn
US3061886A (en) * 1960-08-12 1962-11-06 Ibm Method for producing a form-retaining roll of extensible tape
US3101245A (en) * 1960-08-18 1963-08-20 American Cyanamid Co Production of polyacrylonitrile fibers
US3149930A (en) * 1960-12-01 1964-09-22 Hans J Behncke Drum drying apparatus
US3184821A (en) * 1961-06-29 1965-05-25 Celanese Corp Treatment of filamentary material
US3245109A (en) * 1961-09-06 1966-04-12 Scragg & Sons Apparatus for drawing a branched filament
US3293719A (en) * 1961-10-03 1966-12-27 Mitsubishi Reiyon Kabushiki Ka Apparatus for producing high bulk fibrous material
US3222799A (en) * 1962-03-22 1965-12-14 Monsanto Co Apparatus for treating filaments
US3191224A (en) * 1962-05-31 1965-06-29 Dow Chemical Co Flexibilizing rigid foams
US3491178A (en) * 1964-02-04 1970-01-20 Mitsubishi Rayon Co Method for spinning bicomponent polypropylene filaments
US3313002A (en) * 1965-08-04 1967-04-11 Du Pont Apparatus for heat treating sheet material
US3679791A (en) * 1970-02-20 1972-07-25 Ici Ltd Process for shrinking film
US3917783A (en) * 1973-08-22 1975-11-04 Northrop Corp Method for strengthening boron filaments for use in forming filamentary composites
US4115562A (en) * 1975-06-30 1978-09-19 Phillips Petroleum Company Treated fabrics and process
US4068998A (en) * 1975-08-21 1978-01-17 Enrico Attucci Apparatus for processing continuously-fed plastics material
US6106447A (en) * 1997-02-07 2000-08-22 Voith Sulzer Papiermaschinen Gmbh Press jacket and roll with a press jacket of this kind

Also Published As

Publication number Publication date
BE572086A (fr)
CH368576A (de) 1963-04-15
FR1215671A (fr) 1960-04-20
NL230605A (fr)
DE1410370A1 (de) 1968-10-24
GB890559A (en) 1962-03-07
DK114642B (da) 1969-07-21
NL101666C (fr)

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