US2002994A - Continue process and apparatus - Google Patents

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Publication number
US2002994A
US2002994A US650512A US65051233A US2002994A US 2002994 A US2002994 A US 2002994A US 650512 A US650512 A US 650512A US 65051233 A US65051233 A US 65051233A US 2002994 A US2002994 A US 2002994A
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US
United States
Prior art keywords
liquid
filaments
treating
roller
rollers
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
US650512A
Inventor
Hartmann August
Hoefinghoff Walter
Bauriedel Gotthard
Ostermann Walter
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.)
AMERICAN BEMBERG CORP
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AMERICAN BEMBERG 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.)
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Publication date
Application filed by AMERICAN BEMBERG CORP filed Critical AMERICAN BEMBERG CORP
Application granted granted Critical
Publication of US2002994A publication Critical patent/US2002994A/en
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Expired - Lifetime legal-status Critical Current

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    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D10/00—Physical treatment of artificial filaments or the like during manufacture, i.e. during a continuous production process before the filaments have been collected
    • D01D10/04—Supporting filaments or the like during their treatment
    • D01D10/0436—Supporting filaments or the like during their treatment while in continuous movement
    • D01D10/0445—Supporting filaments or the like during their treatment while in continuous movement using rollers with mutually inclined axes

Definitions

  • This invention relates to an improved process of and apparatus for the manufacture of artificial silk and analogous products.
  • One object of this invention is to provide an improved process for the after treatment of artificial silk, wherein a plurality of groups of artificial filaments .are advanced together substantially in a helical path over the surface of a rotating cylinder;
  • Another object of this invention is to provide an improved process of and apparatus for the after treatment of artificial silk filaments whereby an equal and uniform treatment of the filaments may be had.
  • a further object of this invention is to provide an improved arrangement for the handling of artificial silk filaments whereby the treating liquids will be sprayed on or contacted with the filaments travelling in a substantially helical path.
  • Figure 1 shows a vertically positioned cylinder provided with a suitable source of liquid which directs the liquid tangentially against the cylindegm e 2 is a view in side elevation of a pair of horizontally disposed rollers provided with means for supplying compressed air thereto;
  • Figure 3 is an end elevation thereof;
  • Figure 4 is a top plan view thereof;
  • Figure 5 is a top plan view of the lower roller showing the arrangement for supplying the treating liquids and the compressed air;
  • Figure 6 is a side elevation of a modified form of treating apparatus
  • Figure 7 is an end elevation thereof;
  • Figure 8 is a top plan view thereof;
  • I Figure 9 is a top plan view of the lower roller showing the wiping arrangement;
  • FIG. 10 is a detailed view of one of the wipers
  • Figure 11 is a side elevation of still another modified form of the invention.
  • a vertically positioned roller I supported by a shaft 2 journalled in the bearing 3.
  • the liquid is sprayed on the roller tangentially thereto by means of a 10 supply pipe 5 located adjacent the'top of the roller.
  • the liquid mov es downwardly on the roller in a steeper and steeper path gradually increasing in width and drips from the edge 4 of the roller into a ring shaped vat or receiver t. 15
  • this receiver is provided with a pipe 2! to draw of! the used treating liquids.
  • the filament 22 moves along the surface of the roller in a helical path and the different windings are maintained at a uniform distance from each so other, by the bar 23 carrying hooks 24 over which each winding is passed.
  • FIGs 2-5 inclusive there is shown a modified form of apparatus in which a pair of cylindrical rollers 25 and 26 are provided for the g5 advance of the thread.
  • the liquid supplied by the pipe lines 21 and 28 to the surface of the lower roller 28 has a tendency, because of the gravitational force exerted thereon, to flow downwardly. This tendency. is overcome by the useo of compressed air supplied throughthe pipe 2! which will force the liquid along the surface of the roller in an axial direction.
  • the resultant of the movements of the liquids causes the liquid to fiow in a substantially helical path.
  • two'wiping blades or members 30 and 30' are arranged between the upper and lower rollers 2
  • the wiping edge of each blade is provided with a plurality of openings or teeth 33.
  • Two difierent liquids are fed uponithe' lower rollers by pipe lines 34 and 35. Because of the slanting position of the blades with respect to the lower roller, the liquids will be moved toward the right hand edge of the roller upon the rotation of the said roller in the direction of the arrow "41. 7
  • An additional blade 36 positioned between the blades 30 and 30' serves to prevent the comingling of the treating liquids used.
  • the liquids are gradually moved along the "surface of the roller passing through the teeth formed in the blades: the liquid will flow through I one of the openings in the, blade and is again taken up and advanced through the next opening after a renewed dispersion on the rollers.
  • FIGs 11 and 12 there is shown apair of cylinders 31 and 38' provided with a plurality of helical grooves 39.
  • the treating liquids are supplied to the cylinder 18 through pipe lines 40 and ll. Because of the helical grooves the liquid is advanced from one end of the cylinder 38 to the other, inv this instance from left to right due to the rotation of the cylinders as indicated by the arrow "1). A change in the direction of rotation of the cylinders, or a change of the helical paths of the grooves, will, naturally. result in a change of direction of the advance of the liquids.
  • FIG 13 there is shown a still further modified form of the invention.
  • a cylinder 42 is supported by'the shaft 43, journalled in the bearing 44, in an inclined position.
  • the liquid drips or fiows on the cylinder from the pipe I! and moves in a helical path uponthegotation of the cylinder toward the lower edge 46.
  • the used liquid is collected in the vat 41 and led ofi through the pipe 40.
  • a guide bar 49 is provided with hooks II which maintain the thread ii in a uniform helical path.
  • rollers arranged adjacent to one another, means to rotate said rollers, and means to supply treating liquid to one of said rollers, said supply means for treating. liquid comprising a liquid supply means, and a means for forcing the liquid supplied along the face of the roll in a helical path.
  • rollers arranged adjacent to one another, means to rotate said rollers, and means to supply treating liquid to one of said rollers, said supply means for treating liquid comprising a liquid supply means, and a means for forcing the liquid supplied along the face of the roller in a helical path, said last mentioned means consisting of a tube supply a stream of air under pressure at an ranged adjacent to one another, a means for supplying treating liquid at'a series of spaced points on one of said rollers, and a means for spreading the liquid along said roller, said last named means comprising ,a blade-like strip arranged adJacent to the surface of the roller.
  • rollers arranged adjacent to one another, a means for sup plying treating liquid at a series of spaced points on one of said rollers, and a means for spreading the liquid along said roller, said last named means comprising a blade-like strip arranged adjacent to the surface of the roller and provided with a series of stops and openings at its edge adjacent said roller.
  • a-device for treating continuous lengths 01 formed filaments, in combination, a helically grooved rollers, means for guiding filaments thereover, and means for passing treating liquid through said grooves.
  • a helically grooved roller means for guiding filaments thereover, and means for passing treating liquid through said grooves, in a direction at an angle to the direction of movement of. said filaments.
  • a source 'of supply for treating liquid means including a cal path at an opposed angle to the path of the treating liquid.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)

Description

May 28, 1935. A. HARTMANN ET AL CONTINUE PROCESS AND APPARATUS 3 Shets-Sheet 1 Filed Jan. 6, 1933 May 28, 1935. A. HARTMANN ET AL CONTINUE PROCESS AND APPARATUS Fi led Jan. 6, 1933 3 Sheets-Sheet 2 Tji cq -5- May 28, 1935. A. HARTMANN ET AL 2,002,994
7 CONTINUE PROCESS AND APPARATUS Filed Jan. 6, 1933 3 Sheets-Sheet 3 I Fig-5- Tiltm M I fjiq E Tjiqfi- 50" a 55 r v 3mm;
abhor/"Mg atented May 28 1935 UNITED STATES 2.002.994 con-rm rnocnss AND APPARATUS August Hartmann, Berlin- Lichterfelde, 'Walter 'Hoefinghoi'f, Hohenlimburg Obernaluner, and Gotthard .Bauriedel and Walter Ostermann,
Wuppertal-Barmen,
rsv to Germany, American Bemberg Corporation, New York, N. Y a corporation of Delaware Application January 6, 1933, Serial No. 650,512 In Austria March 5, 1932' 12 Claims.
This invention relates to an improved process of and apparatus for the manufacture of artificial silk and analogous products.
In the treatment of artificial silk thread many methods and apparatus have been devised to subject the thread to various treating liquids and Sugdrying mediums without injury thereto. gestions have been made to guide artificial filaments in a helical path over discs and the like which partially or entirely dip into treating baths. Ithas also been suggested that the artificial filaments be guided over rotating reels so constructed 'as to advance the filaments in an axial direction while spraying the filaments with the desired treating liquid.
One object of this invention is to provide an improved process for the after treatment of artificial silk, wherein a plurality of groups of artificial filaments .are advanced together substantially in a helical path over the surface of a rotating cylinder;
Another object of this invention is to provide an improved process of and apparatus for the after treatment of artificial silk filaments whereby an equal and uniform treatment of the filaments may be had.
A further object of this invention is to provide an improved arrangement for the handling of artificial silk filaments whereby the treating liquids will be sprayed on or contacted with the filaments travelling in a substantially helical path.
These and other objects of our present invention will become more apparent from a study of the following description and by reference to the attached drawings in which:
Figure 1 shows a vertically positioned cylinder provided with a suitable source of liquid which directs the liquid tangentially against the cylindegm e 2 is a view in side elevation of a pair of horizontally disposed rollers provided with means for supplying compressed air thereto;
Figure 3 is an end elevation thereof; Figure 4 is a top plan view thereof; Figure 5 is a top plan view of the lower roller showing the arrangement for supplying the treating liquids and the compressed air;
Figure 6 is a side elevation of a modified form of treating apparatus;
Figure 7 is an end elevation thereof; Figure 8 is a top plan view thereof; I Figure 9 is a top plan view of the lower roller showing the wiping arrangement;
' Figure 10 is a detailed view of one of the wipers;
Figure 11 is a side elevation of still another modified form of the invention; Figure 12 is an end elevation thereof; and- Figure 13 is a view showing a roller in a slanting position and provided with a spray device. 5
Referring now to the drawings and more par'-' I ticularly to Figure 1, there is shown a vertically positioned roller I, supported by a shaft 2 journalled in the bearing 3. The liquid is sprayed on the roller tangentially thereto by means ofa 10 supply pipe 5 located adjacent the'top of the roller. The liquid mov es downwardly on the roller in a steeper and steeper path gradually increasing in width and drips from the edge 4 of the roller into a ring shaped vat or receiver t. 15 As. will be noted this receiver is provided with a pipe 2! to draw of! the used treating liquids. The filament 22 moves along the surface of the roller in a helical path and the different windings are maintained at a uniform distance from each so other, by the bar 23 carrying hooks 24 over which each winding is passed.
In Figures 2-5 inclusive, there is shown a modified form of apparatus in which a pair of cylindrical rollers 25 and 26 are provided for the g5 advance of the thread. The liquid supplied by the pipe lines 21 and 28 to the surface of the lower roller 28 has a tendency, because of the gravitational force exerted thereon, to flow downwardly. This tendency. is overcome by the useo of compressed air supplied throughthe pipe 2! which will force the liquid along the surface of the roller in an axial direction. The resultant of the movements of the liquids causes the liquid to fiow in a substantially helical path.
In accordance with the modification disclosed in Figures 6-10 inclusive, two'wiping blades or members 30 and 30' are arranged between the upper and lower rollers 2| and 32 and adjacent the. said lower roller, and in a slanting position with respect thereto. The wiping edge of each blade is provided with a plurality of openings or teeth 33. Two difierent liquids are fed uponithe' lower rollers by pipe lines 34 and 35. Because of the slanting position of the blades with respect to the lower roller, the liquids will be moved toward the right hand edge of the roller upon the rotation of the said roller in the direction of the arrow "41. 7
An additional blade 36 positioned between the blades 30 and 30' serves to prevent the comingling of the treating liquids used. In operation the liquids are gradually moved along the "surface of the roller passing through the teeth formed in the blades: the liquid will flow through I one of the openings in the, blade and is again taken up and advanced through the next opening after a renewed dispersion on the rollers.
In Figures 11 and 12, there is shown apair of cylinders 31 and 38' provided with a plurality of helical grooves 39. The treating liquids are supplied to the cylinder 18 through pipe lines 40 and ll. Because of the helical grooves the liquid is advanced from one end of the cylinder 38 to the other, inv this instance from left to right due to the rotation of the cylinders as indicated by the arrow "1). A change in the direction of rotation of the cylinders, or a change of the helical paths of the grooves, will, naturally. result in a change of direction of the advance of the liquids.
In Figure 13, there is shown a still further modified form of the invention. A cylinder 42 is supported by'the shaft 43, journalled in the bearing 44, in an inclined position. The liquid drips or fiows on the cylinder from the pipe I! and moves in a helical path uponthegotation of the cylinder toward the lower edge 46. The used liquid is collected in the vat 41 and led ofi through the pipe 40. A guide bar 49 is provided with hooks II which maintain the thread ii in a uniform helical path.
From the above description it will be appreciated that many changes may be madein the construction of. the device without in any way departing from the spirit or scope of the invention. Accordingly, the invention is to be limited, only by the scope of the following claims taken in view of the prior art.
The invention having been set forth as required by the patent statutes, what is claimed is:
1. In a device for treating continuous lengths of filaments of artificial origin, in combination, rollers arranged adjacent to one another, means to rotate said rollers, and means to supply treating liquid to one of said rollers, said supply means for treating. liquid comprising a liquid supply means, and a means for forcing the liquid supplied along the face of the roll in a helical path.
2. In a device for treating continuous lengths 1 of filaments of artificial origin, in combination, rollers arranged adjacent to one another, means to rotate said rollers, and means to supply treating liquid to one of said rollers, said supply means for treating liquid comprising a liquid supply means, and a means for forcing the liquid supplied along the face of the roller in a helical path, said last mentioned means consisting of a tube supply a stream of air under pressure at an ranged adjacent to one another, a means for supplying treating liquid at'a series of spaced points on one of said rollers, and a means for spreading the liquid along said roller, said last named means comprising ,a blade-like strip arranged adJacent to the surface of the roller.
5. In a device for treating continuous filaments oi artificial origin, in combination, rollers arranged adjacent to one another, a means for sup plying treating liquid at a series of spaced points on one of said rollers, and a means for spreading the liquid along said roller, said last named means comprising a blade-like strip arranged adjacent to the surface of the roller and provided with a series of stops and openings at its edge adjacent said roller.
6. In a-device for treating continuous lengths 01 formed filaments, in combination, a helically grooved rollers, means for guiding filaments thereover, and means for passing treating liquid through said grooves.
7. In a device i'ortreating continuous lengths of formed filaments, in combination, a helically grooved roller, means for guiding filaments thereover, and means for passing treating liquid through said grooves, in a direction at an angle to the direction of movement of. said filaments.
8. In combination, a pair of helically grooved rollers, around which the filaments are passed in a helical path, one of said rollers being at an angle to the other, and liquid passing through said grooves on said rollers, said treating liquid travelling in a path counter-current to the direction of travel of said filaments.
9. In a process for continuously producing artificial filaments, the steps of passing the filaments upwardly in a helical path around a rotating cylinder, and passing a treating fluid in a helical path at an opposed angle to the path of the filaments.
10. In a process of the t p set forth, the step of passing a freshly formed artificial filament in a. helical path over a rotating cylinder, and passing treating liquid over the said rotating cylinder at an opposed angle to the path of the filament.
11. In a device for continually treating filaments of artificial origin, in combination, a source 'of supply for treating liquid, means including a cal path at an opposed angle to the path of the treating liquid.
AUGUST HARTMANN.
WALTER HOEFINGHOFF.
GO'I'I'HARD BAURIEDEL. WALTER OSTERMANN.
US650512A 1932-03-05 1933-01-06 Continue process and apparatus Expired - Lifetime US2002994A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT135996T 1932-03-05
DEB159416D DE599757C (en) 1932-03-05 1933-02-01 Method and device for post-treatment of rayon in a continuous operation

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US2002994A true US2002994A (en) 1935-05-28

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US708088A Expired - Lifetime US2020057A (en) 1932-03-05 1934-01-24 Process and apparatus for the treatment of artificial silk

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AT (2) AT135996B (en)
CH (1) CH179941A (en)
DE (2) DE596342C (en)
FR (2) FR747438A (en)
GB (2) GB394217A (en)
NL (2) NL38468C (en)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2416534A (en) * 1942-07-14 1947-02-25 North American Rayon Corp Apparatus for treating yarn
US2416533A (en) * 1942-07-14 1947-02-25 North American Rayon Corp Process for the manufacture of synthetic yarn
US2456120A (en) * 1945-02-19 1948-12-14 American Viscose Corp Thread advancing reel
US2532325A (en) * 1942-07-14 1950-12-05 North American Rayon Corp Apparatus for treating yarn
US2551646A (en) * 1944-02-29 1951-05-08 American Viscose Corp Method of and apparatus for the liquid treatment of artificial continuous filamentary materials
US2608850A (en) * 1948-02-06 1952-09-02 American Viscose Corp Apparatus for the liquid treatment of yarns and the like
US2621390A (en) * 1947-04-14 1952-12-16 Ici Ltd Roll system
US2625811A (en) * 1949-01-28 1953-01-20 Kuljian Corp Thread processing reel having liquid applying and liquid removing means
US2647389A (en) * 1948-02-06 1953-08-04 American Viscose Corp Yarn advancing reel having liquid applying and liquid stripping means
US2655429A (en) * 1949-08-27 1953-10-13 American Viscose Corp Method and apparatus for liquid treating yarn traveling in a helical path
US2682335A (en) * 1949-12-28 1954-06-29 Remington Rand Inc Strip handling machine
US2720100A (en) * 1950-06-22 1955-10-11 Wiskemann Franz Apparatus for the fluid treatment of filamentary material
US2730889A (en) * 1950-10-14 1956-01-17 Ind Rayon Corp Reel for the fluid treatment of thread
US2748587A (en) * 1950-04-17 1956-06-05 American Enka Corp Device for the wet treatment of artificial threads
US2859605A (en) * 1954-08-31 1958-11-11 Celanese Corp Reel type apparatus for the liquid treatment of yarn

Families Citing this family (32)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2894386A (en) * 1959-07-14 Apparatus for the continuous treatment of artificial
GB448774A (en) * 1934-09-11 1936-06-11 Lustrafil Ltd Improvements in or relating to the treatment of artificial silk or other textile filaments
NL45664C (en) * 1935-02-18 1939-05-15
DE745218C (en) * 1937-02-15 1944-03-21 Waclaw Ufnowski Device for de-acidifying and degassing running endless artificial threads
GB509854A (en) * 1939-02-24 1939-07-24 Lustrafil Ltd Improvements in or relating to the treatment of filaments, threads or yarns
DE739572C (en) * 1939-05-21 1943-09-29 Carl Hamel Ag Device for the continuous conveying and post-treatment of artificial threads, rayon and the like. like
DE741767C (en) * 1940-04-22 1943-11-17 Barmag Barmer Maschf Thread overflow rollers for the treatment of artificial silk threads
NL62033C (en) * 1943-10-02 1900-01-01
US2499464A (en) * 1944-05-10 1950-03-07 American Viscose Corp Apparatus for fluid treatment of artificial filaments and threads
US2634597A (en) * 1945-04-06 1953-04-14 American Viscose Corp Apparatus for liquid treatment of strands
NL60832C (en) * 1945-06-30
US2541149A (en) * 1945-08-29 1951-02-13 Du Pont Draw roll mechanism for hot stretching of artificial filaments
US2513381A (en) * 1945-12-06 1950-07-04 American Viscose Corp Method for treatment of filaments
US2599603A (en) * 1946-02-23 1952-06-10 Lustrafil Ltd Apparatus for advancing strands
US2470299A (en) * 1946-07-26 1949-05-17 American Viscose Corp Method of and apparatus for liquid treatment of yarns
US2659225A (en) * 1947-10-09 1953-11-17 Du Pont Apparatus for advancing and processing strands
NL76612C (en) * 1947-12-26
BE486474A (en) * 1947-12-31
US2593555A (en) * 1948-01-23 1952-04-22 American Viscose Corp Apparatus for the treatment of filamentary materials, particularly with liquids
DE957335C (en) * 1950-09-10 1957-01-31 Harry Asdour Kuljian Treatment reel for artificial threads
DE889510C (en) * 1951-07-15 1953-09-10 Glanzstoff Ag Twisted pair of rollers for the post-treatment of artificial threads
BE512824A (en) * 1951-07-18
BE515351A (en) * 1951-11-08
NL99812C (en) * 1952-01-25
BE519507A (en) * 1952-04-30
BE537745A (en) * 1954-04-30 1900-01-01
DE1190603B (en) * 1957-11-12 1965-04-08 Courtaulds Ltd Device for drying a strand of artificial threads
NL234793A (en) * 1958-01-30
DE1937058B1 (en) * 1969-07-21 1971-03-25 Rosen Karl I J Textile, especially knitting machine, for processing oiled or paraffinized thread
EP3564415A1 (en) * 2013-10-29 2019-11-06 Braskem S.A. System and method of dosing a polymer mixture with a first solvent
CN104963017A (en) * 2015-06-06 2015-10-07 茅伟萍 Wire feeding roller
GB201818265D0 (en) * 2018-11-09 2018-12-26 Highcon Systems Ltd System and method for cleaning a laser cut substrate

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2416533A (en) * 1942-07-14 1947-02-25 North American Rayon Corp Process for the manufacture of synthetic yarn
US2416535A (en) * 1942-07-14 1947-02-25 North American Rayon Corp Apparatus for wet treatment and drying of a moving wet spun synthetic thread strand
US2532325A (en) * 1942-07-14 1950-12-05 North American Rayon Corp Apparatus for treating yarn
US2416534A (en) * 1942-07-14 1947-02-25 North American Rayon Corp Apparatus for treating yarn
US2551646A (en) * 1944-02-29 1951-05-08 American Viscose Corp Method of and apparatus for the liquid treatment of artificial continuous filamentary materials
US2456120A (en) * 1945-02-19 1948-12-14 American Viscose Corp Thread advancing reel
US2621390A (en) * 1947-04-14 1952-12-16 Ici Ltd Roll system
US2647389A (en) * 1948-02-06 1953-08-04 American Viscose Corp Yarn advancing reel having liquid applying and liquid stripping means
US2608850A (en) * 1948-02-06 1952-09-02 American Viscose Corp Apparatus for the liquid treatment of yarns and the like
US2625811A (en) * 1949-01-28 1953-01-20 Kuljian Corp Thread processing reel having liquid applying and liquid removing means
US2655429A (en) * 1949-08-27 1953-10-13 American Viscose Corp Method and apparatus for liquid treating yarn traveling in a helical path
US2682335A (en) * 1949-12-28 1954-06-29 Remington Rand Inc Strip handling machine
US2748587A (en) * 1950-04-17 1956-06-05 American Enka Corp Device for the wet treatment of artificial threads
US2720100A (en) * 1950-06-22 1955-10-11 Wiskemann Franz Apparatus for the fluid treatment of filamentary material
US2730889A (en) * 1950-10-14 1956-01-17 Ind Rayon Corp Reel for the fluid treatment of thread
US2859605A (en) * 1954-08-31 1958-11-11 Celanese Corp Reel type apparatus for the liquid treatment of yarn

Also Published As

Publication number Publication date
CH179941A (en) 1935-09-30
NL38468C (en) 1936-07-15
FR43522E (en) 1934-06-23
US2020057A (en) 1935-11-05
GB394217A (en) 1933-06-22
AT139444B (en) 1934-11-10
DE599757C (en) 1934-07-11
FR747438A (en) 1933-06-16
NL41696C (en) 1937-10-15
GB425392A (en) 1935-03-13
DE596342C (en) 1934-05-03
AT135996B (en) 1933-12-27

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