US2814828A - Apparatus for manufacture of fibers of inorganic thermoplastic material - Google Patents

Apparatus for manufacture of fibers of inorganic thermoplastic material Download PDF

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US2814828A
US2814828A US418848A US41884854A US2814828A US 2814828 A US2814828 A US 2814828A US 418848 A US418848 A US 418848A US 41884854 A US41884854 A US 41884854A US 2814828 A US2814828 A US 2814828A
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fibers
stream
manufacture
disk
funnel
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US418848A
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Svende Ake Karl Erik
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Hoganas Billesholms AB
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Hoganas Billesholms AB
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    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/70—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres
    • D04H1/72—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being randomly arranged
    • D04H1/732—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being randomly arranged by fluid current, e.g. air-lay
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
    • C03B37/01—Manufacture of glass fibres or filaments
    • C03B37/04—Manufacture of glass fibres or filaments by using centrifugal force, e.g. spinning through radial orifices; Construction of the spinner cups therefor
    • C03B37/05—Manufacture of glass fibres or filaments by using centrifugal force, e.g. spinning through radial orifices; Construction of the spinner cups therefor by projecting molten glass on a rotating body having no radial orifices
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
    • D04H1/4209—Inorganic fibres
    • D04H1/4218—Glass fibres
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
    • D04H1/4209—Inorganic fibres
    • D04H1/4218—Glass fibres
    • D04H1/4226—Glass fibres characterised by the apparatus for manufacturing the glass fleece
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/70—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres
    • D04H1/72—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being randomly arranged
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/70—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres
    • D04H1/72—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being randomly arranged
    • D04H1/736—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being randomly arranged characterised by the apparatus for arranging fibres

Definitions

  • This invention relates to an apparatus for the manufacture of inorganic fibers, particularly of glass, slag or other thermoplastic, inorganic material, in which a jet of the melted, fluid material is transformed into fine threads by the centrifugal eifect of a rotating disk.
  • the fibers have been obtained as annular hanks, which have been taken down upon a table where they have been intermittently cut open with knives or scissors and removed. Rotating circular saw blades and knives rotating vertically or horizontally have sometimes been used for cutting the hanks open, in order to remove the fibers continuously.
  • This invention relates to an apparatus for collecting and removing the fibers formed.
  • the method of using the invention which is based upon the use of a rotating centrifugal disk, is mainly characterized in that the fibers thrown out from the disk, immediately after having left the edge of the disk, are exposed to the action of a first stream of air, directed downwards at an angle to the vertical, so as to form staple fibers, and preferably somewhat later are exposed to the action of a second stream of air, directed more horizontally, whereafter the fibers, if desired, are coated with a liquid binder or lubricant.
  • the binder or lubricant to be added is preferably dispersed in the horizontal stream of air, said stream of air thus transporting the binder or lubricant to the fibers.
  • the apparatus consists substantially of a centrifugal disk apparatus, common in this art, and is mainly characterized in a blowing fan impeller being provided upon the same shaft as the centrifugal disk, and under said disk, the blowing fan impeller consisting of tWo conical funnels partly pushed over each other, fan blades being provided in the interstice between the two funnels, so as to produce the first stream of air which is directed downwards at an angle to the vertical.
  • the lower funnel is preferably at its lower edge provided with a circular flange, turned outwards and being provided with fan blades underneath, so as to produce the second, horizontally directed stream of air, which among other things shall prevent the fibers from sticking to the bottom of the mantle surrounding the impeller.
  • FIG. 1 illustrates an apparatus according to the invention in vertical cross section
  • Fig. 2 is a top plan view of the centrifugal disk apparatus illustrated in Fig. 1.
  • the drawing shows a melting furnace 2 for the in: organic material from which fibers are to be made.
  • the furnace has a bottom opening 4, through which the melted material passes as a fine jet.
  • a centrifugal disk 6 is provided upon a shaft 26.
  • a blowing fan impeller is provided on the shaft 26, under the disk 6, said blowing fan impeller consisting of two conical funnels 8, 10, the top angles of which are somewhat different.
  • faurblades ,.-16;a.- The;upperaconical fuinnelii8- has or-tits; purpose .to. direct the stream ofifibers andeto pre vent the fibers from coming in contactazwith itheafair bladesr
  • Theafamiimpellera istsurroundedib as mantle 12;; arrangedi avtfan ,housinglandciprovidedxwitlb an;outlety opening; 14iforcthe-fihers rand ithefiber' transport ng ;Streams;;of lair.
  • The; lowentedgerofetlre lowen-conicala funnel llleis:providedzwitlrraaflange. 22; tnrnedroutwardsit fan blades 24 being provided under said flange so as to produce a horizontal stream of air along the bottom of the mantle 12, for preventing the fibers from coming in contact with and sticking to the bottom.
  • the tunnel 8 is supported on the funnel 10 by the inwardly extending projections 9 and the funnel 10 is supported on the shaft 26 through the bushing 11.
  • the apparatus illustrated in the drawing is provided with the following device.
  • a flange 18 secured thereto and extending inwardly is arranged so as to form a wedge-shaped channel between the flange and the inner wall of the funnel, said wedge-chaped channel having small interstices or openings in its bottom close to the inner wall of the funnel 10.
  • the outlet opening of a pipe 20 for a liquid binder, lubricant or a similar agent is provided above or in said channel.
  • the liquid agent will flow down along the inner wall of the conical funnel 10 to the fan blades 24, and will be thrown out by said fan blades 24 together with the horizontal stream of air, and will consequently come into contact with the stream of fibers coming from above.
  • a similar feeding device for a lubricating or binding agent may of course be arranged in the upper conical funnel, the agent being thrown out by means of the fan blades 16.
  • the apparatus illustrated in the drawing works in the following manner.
  • the inorganic thermoplastic material is melted in the furnace 2 and flows as a fine jet through the bottom opening 4 down upon the rapid-rotating centrifugal disk 6 where it is transformed into fine threads or fibers, which are thrown out from the disk. After having left the edge of the disk, the fibers will soon lose their horizontal speed and will fall downwards, thereby passing the stream of air induced by the suction action of the fan blades 16, the fibers being thus cooled. The fibers then are directed somewhat outwards by the upper conical funnel 8 and are caught by the stream of air, which is induced by the fan blades 16 and which is directed downwards at an angle to the vertical.
  • the fibers never have an opportunity of forming a hank, but are, in the form of staple fibers, directed by the stream of air past the two conical funnels 8, 10, and are then exposed to the horizontal stream of air, in which a lubricant or a binder may be dispersed and are at last discharged through the opening 14.
  • a uniform stream of a staple fiber product having very good qualities for the manufacture of felt and plates is produced in the apparatus according to the invention.
  • Apparatus for the manufacture of fibers comprising a circular disk mounted for rotation on a vertical shaft, means for delivering a stream of thermoplastic, inorganic material in liquid state on to said disk, two spaced apart upwardly converging, overlapping, frusto conical members mounted on said shaft below said disk for rotation therewith and fan blades positioned between said mem- References Cited in the file of this patent bers and secured to at least one of them.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
  • Nonwoven Fabrics (AREA)
  • Reinforced Plastic Materials (AREA)
  • Inorganic Fibers (AREA)
  • Manufacture, Treatment Of Glass Fibers (AREA)

Description

Dec.-3, 1957 AKE K. E. SVENDE 2,814,823
APPARATUS FOR MANUFACTURE OF FIBERS OF INORGANIC THERMOPLASTIC MATERIAL Filed March 26, 1954 Aid ATTORNEYS ilnited States Patent APPARATUS FOR MANUFAGTURE} F FIBERS, OF: INORGANIC THERMOPLASTIQMATER-IAL.
Ake Karl Erik Svende,Billesh olm,v Sweden, assignor to Hoganas-Billesholms Aktieb'olag Hoganas, Sweden, 2! Swedish company...
Application March 26, 1954,.Scfiall1o. 418,848 Claims priority, application Sweden March 31, 1953 3 Claims. (Cl. 18-2.6)
This invention relates to an apparatus for the manufacture of inorganic fibers, particularly of glass, slag or other thermoplastic, inorganic material, in which a jet of the melted, fluid material is transformed into fine threads by the centrifugal eifect of a rotating disk. In earlier known methods and apparatuses for this manufacture the fibers have been obtained as annular hanks, which have been taken down upon a table where they have been intermittently cut open with knives or scissors and removed. Rotating circular saw blades and knives rotating vertically or horizontally have sometimes been used for cutting the hanks open, in order to remove the fibers continuously.
This invention relates to an apparatus for collecting and removing the fibers formed.
The method of using the invention, which is based upon the use of a rotating centrifugal disk, is mainly characterized in that the fibers thrown out from the disk, immediately after having left the edge of the disk, are exposed to the action of a first stream of air, directed downwards at an angle to the vertical, so as to form staple fibers, and preferably somewhat later are exposed to the action of a second stream of air, directed more horizontally, whereafter the fibers, if desired, are coated with a liquid binder or lubricant. The binder or lubricant to be added is preferably dispersed in the horizontal stream of air, said stream of air thus transporting the binder or lubricant to the fibers.
The apparatus consists substantially of a centrifugal disk apparatus, common in this art, and is mainly characterized in a blowing fan impeller being provided upon the same shaft as the centrifugal disk, and under said disk, the blowing fan impeller consisting of tWo conical funnels partly pushed over each other, fan blades being provided in the interstice between the two funnels, so as to produce the first stream of air which is directed downwards at an angle to the vertical. The lower funnel is preferably at its lower edge provided with a circular flange, turned outwards and being provided with fan blades underneath, so as to produce the second, horizontally directed stream of air, which among other things shall prevent the fibers from sticking to the bottom of the mantle surrounding the impeller.
The invention will hereinafter be described more fully with reference to the attached drawing in which Fig. 1 illustrates an apparatus according to the invention in vertical cross section, and Fig. 2 is a top plan view of the centrifugal disk apparatus illustrated in Fig. 1.
The drawing shows a melting furnace 2 for the in: organic material from which fibers are to be made. The furnace has a bottom opening 4, through which the melted material passes as a fine jet. Under the bottom opening a centrifugal disk 6 is provided upon a shaft 26. A blowing fan impeller is provided on the shaft 26, under the disk 6, said blowing fan impeller consisting of two conical funnels 8, 10, the top angles of which are somewhat different. The upper funnel 8 is partly pushed over the lower funnel 10, and in the interstice between "ice 2;: theseafunnels :.which;=overlap-:each:-other :inrpartg: there are provided. faurblades ,.-16;a.- The;upperaconical fuinnelii8- has or-tits; purpose .to. direct the stream ofifibers andeto pre vent the fibers from coming in contactazwith itheafair bladesr Thegfunneh 8L thuwpnotectssthecfanlblades from bQiIlg;WOIIla 011th.v Theafamiimpellera istsurroundedib as mantle 12;; arrangedi avtfan ,housinglandciprovidedxwitlb an;outlety opening; 14iforcthe-fihers rand ithefiber' transport ng ;Streams;;of lair. The; lowentedgerofetlre lowen-conicala funnel llleis:providedzwitlrraaflange.=22; tnrnedroutwardsit fan blades 24 being provided under said flange so as to produce a horizontal stream of air along the bottom of the mantle 12, for preventing the fibers from coming in contact with and sticking to the bottom. The tunnel 8 is supported on the funnel 10 by the inwardly extending projections 9 and the funnel 10 is supported on the shaft 26 through the bushing 11.
In manufacturing inorganic fibers it is often desirable to coat the fibers with a thin layer of a binder, lubricant or a similar agent. For adding such an agent in a liquid state, e. g. melted, dissolved or emulsified, the apparatus illustrated in the drawing is provided with the following device.
Within the lower conical funnel 10 a flange 18 secured thereto and extending inwardly is arranged so as to form a wedge-shaped channel between the flange and the inner wall of the funnel, said wedge-chaped channel having small interstices or openings in its bottom close to the inner wall of the funnel 10. The outlet opening of a pipe 20 for a liquid binder, lubricant or a similar agent is provided above or in said channel. The liquid agent will flow down along the inner wall of the conical funnel 10 to the fan blades 24, and will be thrown out by said fan blades 24 together with the horizontal stream of air, and will consequently come into contact with the stream of fibers coming from above. A similar feeding device for a lubricating or binding agent may of course be arranged in the upper conical funnel, the agent being thrown out by means of the fan blades 16. The apparatus illustrated in the drawing works in the following manner.
The inorganic thermoplastic material is melted in the furnace 2 and flows as a fine jet through the bottom opening 4 down upon the rapid-rotating centrifugal disk 6 where it is transformed into fine threads or fibers, which are thrown out from the disk. After having left the edge of the disk, the fibers will soon lose their horizontal speed and will fall downwards, thereby passing the stream of air induced by the suction action of the fan blades 16, the fibers being thus cooled. The fibers then are directed somewhat outwards by the upper conical funnel 8 and are caught by the stream of air, which is induced by the fan blades 16 and which is directed downwards at an angle to the vertical. By this means the fibers never have an opportunity of forming a hank, but are, in the form of staple fibers, directed by the stream of air past the two conical funnels 8, 10, and are then exposed to the horizontal stream of air, in which a lubricant or a binder may be dispersed and are at last discharged through the opening 14.
A uniform stream of a staple fiber product having very good qualities for the manufacture of felt and plates is produced in the apparatus according to the invention.
What we claim is:
1. Apparatus for the manufacture of fibers comprising a circular disk mounted for rotation on a vertical shaft, means for delivering a stream of thermoplastic, inorganic material in liquid state on to said disk, two spaced apart upwardly converging, overlapping, frusto conical members mounted on said shaft below said disk for rotation therewith and fan blades positioned between said mem- References Cited in the file of this patent bers and secured to at least one of them.
2. Apparatus as defined in claim 1 in which the lower UNITED STATES PATENTS edge of the lower of said two frusto conical members 384,571 f P 14, 1903 extends outwardly as a substantially horizontally dis- 5 2,136,933 White 1938 posed flange and fan blades are mounted on the lower $255,227 Parsons p 9, 1941 surfagg of said flange et al- Sept. 7, 3. Apparatus as defined in claim 2 comprising a flange 2,707,847 All-like! y 10, 1955 secured to the inner surface of the lower of said frusto conical members and forming therewith a channel, open- 10 FOREIGN PATENTS ings between the outer edge of said flange and the inner 143,472 Australia Sept. 18, 1951 surface of said member for the passage of liquid and a 147,892 Australia Aug. 22, 1952 pipe positioned to deliver liquid into said channel. 668,490 Great Britain Mar. 19, 1952
US418848A 1953-03-31 1954-03-26 Apparatus for manufacture of fibers of inorganic thermoplastic material Expired - Lifetime US2814828A (en)

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SE753378X 1953-03-31

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CH (1) CH319497A (en)
DE (1) DE1027374B (en)
FR (1) FR1097787A (en)
GB (1) GB753378A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2987762A (en) * 1958-11-20 1961-06-13 Miles S Firnhaber Apparatus for manufacturing mineral wool
US3227536A (en) * 1962-01-18 1966-01-04 Miles S Firnhaber Apparatus for manufacturing fibers of thermoplastic material
CN114182366A (en) * 2022-01-14 2022-03-15 福建永荣锦江股份有限公司 Superfine polyamide fiber air cooling device

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3048886A (en) * 1960-04-01 1962-08-14 Sealtite Insulation Mfg Corp Apparatus for manufacturing mineral wool fibers
DK146297C (en) * 1975-09-01 1984-02-13 Rockwool Int METHOD AND APPARATUS FOR MINING WOOL MANUFACTURING

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US884571A (en) * 1906-04-05 1908-04-14 Percy F Cowing Process for forming metal into flakes.
US2136988A (en) * 1936-12-12 1938-11-15 Clarence B White Method of and apparatus for producing mineral wool
US2255227A (en) * 1938-11-10 1941-09-09 United States Gypsum Co Apparatus for producing mineral wool
US2328714A (en) * 1941-03-19 1943-09-07 American Rock Wool Corp Apparatus and method whereby improved mineral wool fibers and products may be made
GB668490A (en) * 1949-01-28 1952-03-19 Algemeene Kunstvezel Mij Naaml Process for the manufacture of mineral fibres, particularly glass fibres, and an apparatus for putting the process into effect
US2707847A (en) * 1952-05-24 1955-05-10 American Rock Wool Corp Means for treating mineral wool fibers

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE435829A (en) * 1938-08-04
BE457471A (en) * 1943-09-01
NL88040C (en) * 1946-05-31
FR1001611A (en) * 1946-06-07 1952-02-26 Saint Gobain Improvements in the manufacture of felts, in particular of glass fibers or other mineral fibers
NL77176C (en) * 1948-08-12
DE826053C (en) * 1948-11-27 1951-12-27 Glaswatte Ges M B H Method and device for producing fibers from glass

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US884571A (en) * 1906-04-05 1908-04-14 Percy F Cowing Process for forming metal into flakes.
US2136988A (en) * 1936-12-12 1938-11-15 Clarence B White Method of and apparatus for producing mineral wool
US2255227A (en) * 1938-11-10 1941-09-09 United States Gypsum Co Apparatus for producing mineral wool
US2328714A (en) * 1941-03-19 1943-09-07 American Rock Wool Corp Apparatus and method whereby improved mineral wool fibers and products may be made
GB668490A (en) * 1949-01-28 1952-03-19 Algemeene Kunstvezel Mij Naaml Process for the manufacture of mineral fibres, particularly glass fibres, and an apparatus for putting the process into effect
US2707847A (en) * 1952-05-24 1955-05-10 American Rock Wool Corp Means for treating mineral wool fibers

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2987762A (en) * 1958-11-20 1961-06-13 Miles S Firnhaber Apparatus for manufacturing mineral wool
US3227536A (en) * 1962-01-18 1966-01-04 Miles S Firnhaber Apparatus for manufacturing fibers of thermoplastic material
CN114182366A (en) * 2022-01-14 2022-03-15 福建永荣锦江股份有限公司 Superfine polyamide fiber air cooling device

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CH319497A (en) 1957-02-28
FR1097787A (en) 1955-07-11
DE1027374B (en) 1958-04-03
GB753378A (en) 1956-07-25

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