CA1169640A - Texturising of yarn - Google Patents
Texturising of yarnInfo
- Publication number
- CA1169640A CA1169640A CA000384879A CA384879A CA1169640A CA 1169640 A CA1169640 A CA 1169640A CA 000384879 A CA000384879 A CA 000384879A CA 384879 A CA384879 A CA 384879A CA 1169640 A CA1169640 A CA 1169640A
- Authority
- CA
- Canada
- Prior art keywords
- filaments
- spring
- filament
- chamber
- fed
- 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
Links
Classifications
-
- 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
- D02G1/12—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics using stuffer boxes
- D02G1/122—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics using stuffer boxes introducing the filaments in the stuffer box by means of a fluid jet
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
Abstract
ABSTRACT
"IMPROVEMENTS RELATING TO THE TEXTURISING OF YARN"
The present specification relates to a method and apparatus for use in the texturising of single or multi-filament thermoplastic yarns. The apparatus comprises a stuffer chamber defined by a loaded, coiled spring which tapers from its inlet end to its wider outlet end.
In use the filament or filaments are fed at a constant rate by a gaseous fluid flow to the stuffer chamber which is maintained at an elevated temperature, wherein the filaments fold transversely to the longitudinal axis of the spring to form a plug of filaments which is continuously disgorged from the stuffer chamber, the filaments being heat set in all different directions about said longitudinal axis.
"IMPROVEMENTS RELATING TO THE TEXTURISING OF YARN"
The present specification relates to a method and apparatus for use in the texturising of single or multi-filament thermoplastic yarns. The apparatus comprises a stuffer chamber defined by a loaded, coiled spring which tapers from its inlet end to its wider outlet end.
In use the filament or filaments are fed at a constant rate by a gaseous fluid flow to the stuffer chamber which is maintained at an elevated temperature, wherein the filaments fold transversely to the longitudinal axis of the spring to form a plug of filaments which is continuously disgorged from the stuffer chamber, the filaments being heat set in all different directions about said longitudinal axis.
Description
1 1~9~
1.
IMPROVEMENTS RELATI~G TO THE TEXTURISING OF YARN
The present invention relates to apparatus and a method for use in the texturising of single or multi-filament yarn.
In particular the present invention relates to the texturising of yarn manufactured from a thermoplastic material.
Yarn manufactured from a thermoplastic material can be texturised to bulk the yarn, in a number of known ways.
However, the bulking of the yarn is usually only in a two-dimensional plane e.g. the yarn takes on a saw tooth configuration. Thus the yarn does not necessarily provide a uniform bulking, i.e. texturising in all possible directions transverse to the yarn.
The aim of the present invention is to provide a method and apparatus for producing a yarn which is more aesthetically pleasing than prior art 2-dimensional yarns as referred to hereabove, the method and apparatus being less capital intensive than previous arrangements.
In accordance with an aspect of the invention there is provided a texturising apparatus for use in producing a three-dimensionally bulked yarn, comprising a stuffer chamber to which one or more filaments of a thermoplastics material can be continuously fed, the stuffer chamber being formed by a tapered spring which is fixedly secured at each end thereof and loaded, the spring having an inlet end through which the filaments are fed, and a wider outlet end.
The apparatus of the present invention utilises a transporter for the continuous filament or filaments, which connects with the narrow end of the spring, the spring being prefereably tensioned between its ends.
Alternatively the spring may be an open wound spring which is compressed. The transporter preferably utilises ~,~
'3~40.
1.
IMPROVEMENTS RELATI~G TO THE TEXTURISING OF YARN
The present invention relates to apparatus and a method for use in the texturising of single or multi-filament yarn.
In particular the present invention relates to the texturising of yarn manufactured from a thermoplastic material.
Yarn manufactured from a thermoplastic material can be texturised to bulk the yarn, in a number of known ways.
However, the bulking of the yarn is usually only in a two-dimensional plane e.g. the yarn takes on a saw tooth configuration. Thus the yarn does not necessarily provide a uniform bulking, i.e. texturising in all possible directions transverse to the yarn.
The aim of the present invention is to provide a method and apparatus for producing a yarn which is more aesthetically pleasing than prior art 2-dimensional yarns as referred to hereabove, the method and apparatus being less capital intensive than previous arrangements.
In accordance with an aspect of the invention there is provided a texturising apparatus for use in producing a three-dimensionally bulked yarn, comprising a stuffer chamber to which one or more filaments of a thermoplastics material can be continuously fed, the stuffer chamber being formed by a tapered spring which is fixedly secured at each end thereof and loaded, the spring having an inlet end through which the filaments are fed, and a wider outlet end.
The apparatus of the present invention utilises a transporter for the continuous filament or filaments, which connects with the narrow end of the spring, the spring being prefereably tensioned between its ends.
Alternatively the spring may be an open wound spring which is compressed. The transporter preferably utilises ~,~
'3~40.
2.
a stream of gaseou~ fluid to carry the filament or filaments continuously forward into the stuffer chamber formed by the tapered spring. The gaseous f`luid is preferably air which is preferably dry and fed at a desired substantially constant speed. The temperature of the air should be adjusted to ~upply the requisite additional heat required for setting the filament or filaments, the filaments having been preheated before reaching the stuffer chamber.
In use the filament or bundle of filaments is fed into the narrow end of the coiled spring forming the stuffer chamber, the filament or filaments being folded within the chamber due to their rate of feed , e.g. lOOQ mlmin, and forming a plug of filament at the outlet end of the spring, the temperature Gf the filament being sufficient to allow the filaments to set in the folded position. The folding of the filament is rando~ly in all directions transverse to the axis of the spring so that a three-dimensional bulking of the filament is achieved. In the event that the plug does not initially form, the wider outlet end of the spring may be blocked off at slow speeds, for a short period of time to prevent the egress of yarn and cause the p}ug to form.
The initially formed plug will continue to grow and extend back towards the inlet end of the spring.
As the plug grows so it covers the gaps between adjacent coils of the spring reducing the area through which the air from the transporter can escape. Thus the air ~0 pressure on the plug increases tensioning and stretching the inlet end of the spring further and ~imultaneously closing the coils together at the outlet end so as to reduce the frictional grip of the spring coils, until the air pressure is able to overcome the frictional
a stream of gaseou~ fluid to carry the filament or filaments continuously forward into the stuffer chamber formed by the tapered spring. The gaseous f`luid is preferably air which is preferably dry and fed at a desired substantially constant speed. The temperature of the air should be adjusted to ~upply the requisite additional heat required for setting the filament or filaments, the filaments having been preheated before reaching the stuffer chamber.
In use the filament or bundle of filaments is fed into the narrow end of the coiled spring forming the stuffer chamber, the filament or filaments being folded within the chamber due to their rate of feed , e.g. lOOQ mlmin, and forming a plug of filament at the outlet end of the spring, the temperature Gf the filament being sufficient to allow the filaments to set in the folded position. The folding of the filament is rando~ly in all directions transverse to the axis of the spring so that a three-dimensional bulking of the filament is achieved. In the event that the plug does not initially form, the wider outlet end of the spring may be blocked off at slow speeds, for a short period of time to prevent the egress of yarn and cause the p}ug to form.
The initially formed plug will continue to grow and extend back towards the inlet end of the spring.
As the plug grows so it covers the gaps between adjacent coils of the spring reducing the area through which the air from the transporter can escape. Thus the air ~0 pressure on the plug increases tensioning and stretching the inlet end of the spring further and ~imultaneously closing the coils together at the outlet end so as to reduce the frictional grip of the spring coils, until the air pressure is able to overcome the frictional
3~ ~rip~of the spring coils on the plue and the bulked o rilaments are forced out of the spring. At this point the area through which transporter air can escape is increased so that the pressure on the plug decreases allowing the spring to contract. The process contlnues the plug being ontinuously formed, 80 that the bulked yarn is ejected continually, the ~pring oscillating back and forth. This is a continuous operation with the bulked yarn merely being collected from the outlet of the stuffer chamber, it being unnecessary to draw the yarn therefrom.
- The maximum possible speed of operation is determined by the taper of the spring, speeds of several thousand metres/minute being possible. However, a speed of 1000 metres/minute'is preferably required with a minimum of 600 metres/minute.
For the yarn to be forced from the stuffer chamber the frictional grip of the spring on the plug is important and this can be rendered sub4tantially constant for different filaments e.g. for different colour~ of filament wherein the pigment can alter the surface friction characteristic, by the addition of a fibre lubricating a~ent e.g. Limanol P811 a proprietary product manufactured by Schill Scheillacher. The use of such a fibre lubricating agent provides for sub-stant~ally uniform bulking of the yarns, this beingclearly desirable.
If the speed and/or fri^tion of the spring/
filament interface, are too great then the plug within the spring will increase in size and back into the transporter blocking further operation. The taper and other characteristics of the spring are therefore important for the continuous operation of the apparatus as desired. The precise action of the spring is de-pendent upon the taper, the diameter of the wire or _ .
11f~96~()
- The maximum possible speed of operation is determined by the taper of the spring, speeds of several thousand metres/minute being possible. However, a speed of 1000 metres/minute'is preferably required with a minimum of 600 metres/minute.
For the yarn to be forced from the stuffer chamber the frictional grip of the spring on the plug is important and this can be rendered sub4tantially constant for different filaments e.g. for different colour~ of filament wherein the pigment can alter the surface friction characteristic, by the addition of a fibre lubricating a~ent e.g. Limanol P811 a proprietary product manufactured by Schill Scheillacher. The use of such a fibre lubricating agent provides for sub-stant~ally uniform bulking of the yarns, this beingclearly desirable.
If the speed and/or fri^tion of the spring/
filament interface, are too great then the plug within the spring will increase in size and back into the transporter blocking further operation. The taper and other characteristics of the spring are therefore important for the continuous operation of the apparatus as desired. The precise action of the spring is de-pendent upon the taper, the diameter of the wire or _ .
11f~96~()
4.
other ma~erial forming the spring, its length and pitch.
Variation in these parameters will produce a variation of the effeet of the spring on the filaments and they should be so chosen as to produce the optimum action on the filaments.
The filament or filaments may have any desired cross-section, Thus in addition to being round, the - cros~-sectlon may ~e delta-shaped, rectangular, triangular or polynodal or may have three or more branches forming fQr example an X or Y configuration. Furthermore, when more than one filament is present in the yarn, filaments of different cross-sections may be used. The filaments may also be hollow.
The continuous filame~t or filaments may be composed of any thermoplastic synthetic plastics material capable of being formed into a foldable filament and filaments of different synthetic plastics materials may b~ present in the yarn. Preferably the synthetic thermoplastic material iq a homopolymer or ¢opolymer of polypropylene.
According to a further feature of the present lnvention there is provided a method of texturising yarn formed from one or more filaments of a thermoplastics material, said method comprising the steps of feeding one or more continuous filaments into a stuffer chamber formed by a loaded tapered, coiled spring, which chamber is mainSained at an elevated temperature, and contin-uously folding said filament or filaments within said chamber whereby to fill at least a portion of the length of the chamber, maintaining said folded filament or filaments within said chamber for a time and at a temperature which sets the filament or filaments in the folded state, and allowing the yarn to spill out of the wider end of the tapered spring.
" ~ The present invention will now be further ¦ described, by way of example, with reference to the .
~1tj'3~0 -
other ma~erial forming the spring, its length and pitch.
Variation in these parameters will produce a variation of the effeet of the spring on the filaments and they should be so chosen as to produce the optimum action on the filaments.
The filament or filaments may have any desired cross-section, Thus in addition to being round, the - cros~-sectlon may ~e delta-shaped, rectangular, triangular or polynodal or may have three or more branches forming fQr example an X or Y configuration. Furthermore, when more than one filament is present in the yarn, filaments of different cross-sections may be used. The filaments may also be hollow.
The continuous filame~t or filaments may be composed of any thermoplastic synthetic plastics material capable of being formed into a foldable filament and filaments of different synthetic plastics materials may b~ present in the yarn. Preferably the synthetic thermoplastic material iq a homopolymer or ¢opolymer of polypropylene.
According to a further feature of the present lnvention there is provided a method of texturising yarn formed from one or more filaments of a thermoplastics material, said method comprising the steps of feeding one or more continuous filaments into a stuffer chamber formed by a loaded tapered, coiled spring, which chamber is mainSained at an elevated temperature, and contin-uously folding said filament or filaments within said chamber whereby to fill at least a portion of the length of the chamber, maintaining said folded filament or filaments within said chamber for a time and at a temperature which sets the filament or filaments in the folded state, and allowing the yarn to spill out of the wider end of the tapered spring.
" ~ The present invention will now be further ¦ described, by way of example, with reference to the .
~1tj'3~0 -
5.
accompan~ing drawing in which one embodiment of the apparatus of the present lnvention is shown in partially outaway perspective.
Referring to the drawing a transporter 1 is constructed of a hollow ~vlindrical body 3 through which a filament inlet pipe 5 extends, one end of pipe 5 connecting with a hole 7 in circular flange 9 of tex-turi~er 11. Withi;; body 3 which is sealed at each end to inlet pipe 5 are three angled air nozzle pipes 13 which connect with the interior of pipe 5. Thus by feeding heated air into body 3 via inlet 15, the air is passed via nozzle pipes 13 into pipe 5, the angled air ~ets thu~ formed, drawing the or each filament along inlet pipe 5 towards texturiser 11.
The texturiser 11 basically comprises two circular flanges 9 and 17, coaxially secured together by support rod 19. A tapered sprlng 21 is tensioned between flanges 9 and 17 and communicate9 with holes 7 and 23 in flanges 9 and 17 re~pectively. The tapered spring has its narrower end secured to flange 9 around inlet hole 7. Alternatively an open wound spring can be be substituted for tensioned spring 21, the open wound spring being loaded under compression between flanges 9 and 17.
In u~e a filament or bundle of filaments is fed from a spool or spools (not shown) mounted on a creel if desired, through appropriate nip or guide rollers ~not shown) both to maintain the desired rate-of feed and to control the infeed tension of the filaments.
Alternatively one or more bobbins of orlentated yarns could serve ~s the feedstock, or the apparatus could d.raw the yarn or yarns into the texturiser. Various yarns e.g. different material and/or colour, could be fed simultaneously to the texturiser.
.
~ 3
accompan~ing drawing in which one embodiment of the apparatus of the present lnvention is shown in partially outaway perspective.
Referring to the drawing a transporter 1 is constructed of a hollow ~vlindrical body 3 through which a filament inlet pipe 5 extends, one end of pipe 5 connecting with a hole 7 in circular flange 9 of tex-turi~er 11. Withi;; body 3 which is sealed at each end to inlet pipe 5 are three angled air nozzle pipes 13 which connect with the interior of pipe 5. Thus by feeding heated air into body 3 via inlet 15, the air is passed via nozzle pipes 13 into pipe 5, the angled air ~ets thu~ formed, drawing the or each filament along inlet pipe 5 towards texturiser 11.
The texturiser 11 basically comprises two circular flanges 9 and 17, coaxially secured together by support rod 19. A tapered sprlng 21 is tensioned between flanges 9 and 17 and communicate9 with holes 7 and 23 in flanges 9 and 17 re~pectively. The tapered spring has its narrower end secured to flange 9 around inlet hole 7. Alternatively an open wound spring can be be substituted for tensioned spring 21, the open wound spring being loaded under compression between flanges 9 and 17.
In u~e a filament or bundle of filaments is fed from a spool or spools (not shown) mounted on a creel if desired, through appropriate nip or guide rollers ~not shown) both to maintain the desired rate-of feed and to control the infeed tension of the filaments.
Alternatively one or more bobbins of orlentated yarns could serve ~s the feedstock, or the apparatus could d.raw the yarn or yarns into the texturiser. Various yarns e.g. different material and/or colour, could be fed simultaneously to the texturiser.
.
~ 3
6.
The filament or bundle of filament~ is drawn through the tran~porter l by the air jets from nozzle pipes 13, and is fed into a stuffer chamber of texturiser ll, which is defined by tensioned tapered spring 21.
The filament or filaments are preheated and the air drawing the filaments through the transporter is also at an elevated temperature which is sufficient to supply . requlsite heat for just setting the filaments. $he filaments, due to their speed, fold across the inside - 10 of the spring in randomly orientated transverse direction~ and form a plug of filament. The filaments are thus compressed and heat ~et in the folded position.
If the speed of the filaments is not sufficient to initially form the plug, the outlet of the texturiser can be closed off for an initial period of time to prevent the egress of yarn and allow the plug to form.
Once started, the plug continues to extend backwards along the spring covering the interstices between the coils a~ ~t goe~ and thus restricting the area of the interstices through which the air from transporter l can escape. This increases the pressure on the plug and stretche~ the narrower inlet end of ~pring 21, and when this pressure reaches the level of the frictional forces holding the plug in place in the spring, part of the plug i5 ejected as bulked yarn, from the spring 21.
This increases the total area between the coils of the spring through which air from the transporter l can escape, reduces the pressure on the plug and allows the spring to contract - the spring stretching again as the plug is formed. The spring thus oscillates back and forth as the plug is continuously formed and ejected.
The diameter of the spring also oscillates as the plug is formed and e~ected. Bulked yarn i9 thus continuously e~ected from the spring and is praferably collected via a relaxation roller which allows the filaments to cool ,.
1.~ 4Q
The filament or bundle of filament~ is drawn through the tran~porter l by the air jets from nozzle pipes 13, and is fed into a stuffer chamber of texturiser ll, which is defined by tensioned tapered spring 21.
The filament or filaments are preheated and the air drawing the filaments through the transporter is also at an elevated temperature which is sufficient to supply . requlsite heat for just setting the filaments. $he filaments, due to their speed, fold across the inside - 10 of the spring in randomly orientated transverse direction~ and form a plug of filament. The filaments are thus compressed and heat ~et in the folded position.
If the speed of the filaments is not sufficient to initially form the plug, the outlet of the texturiser can be closed off for an initial period of time to prevent the egress of yarn and allow the plug to form.
Once started, the plug continues to extend backwards along the spring covering the interstices between the coils a~ ~t goe~ and thus restricting the area of the interstices through which the air from transporter l can escape. This increases the pressure on the plug and stretche~ the narrower inlet end of ~pring 21, and when this pressure reaches the level of the frictional forces holding the plug in place in the spring, part of the plug i5 ejected as bulked yarn, from the spring 21.
This increases the total area between the coils of the spring through which air from the transporter l can escape, reduces the pressure on the plug and allows the spring to contract - the spring stretching again as the plug is formed. The spring thus oscillates back and forth as the plug is continuously formed and ejected.
The diameter of the spring also oscillates as the plug is formed and e~ected. Bulked yarn i9 thus continuously e~ected from the spring and is praferably collected via a relaxation roller which allows the filaments to cool ,.
1.~ 4Q
7.
sufficiently to set the crimp so that ~ubqequent winding tension does not pull the crimp out. ~he relaxation roller also acts as a resèrvoir to allow compensation for tension control. Due to the folding of the filaments in randomly orientated direction~
transverse to the longitudinal axis of spring 21, a three-dimensional bulking of the filaments is achieved.
A plug of filament thus remains at all times in the spring, an equilibrium being set up between the air pressure build up on the one hand, and the frict-ional forces between the spring coils and the plug.
Critical parameters in this operation to produce desired output speeds for the bulked yarn of 1000 metres/minute - with a minimum of 600 metres/minute, are the degree of taper of the spring i.e. the difference between the diamecer of the spring ends relative to the spring length, the nature of the ~pring surface, the material of the spring and the filament material.
Havln~ selectcd the above parameters to provide a given performan¢e with a particular filament materi~l, the bulking of that filament material and thus the performance of the apparatus, can be affected by change~
in the nature of the filament. For example the addition of different pigments to the same basic filament material can result in different bulking, the surface friction coefficients changing due to the addition of pigment. Such variations can be minimised to produce sub~tantially constant bulking by the uqe of a fibre lubricant e.g. Limanol P~ll manufactured by Schill 30 Scheillacher.
The invention will be further illustrated with reference to the following example:-EXAMPLE 1.
~ The procedure described above was carried out 35 using a tow of polyDropylene filaments and a transporter i4V
a~ illustrated in the draw~ng, with an air temperature of 165C and at a pres~ure of 154 p.s.i. The tow has 120 fllament~ and the polypropylene had an m.f.i. of lO and a denier per filament of 16.6. The dimen~ions of the tapered qpring forming the texturiser were as rOllOwS~
Inch rate = 0.22 lbs - wire diameter = 0.025"
free length = 2"
.. 1~ extended or working length = 2.5"
Spring diameter tapers uniformly during its length from 0.1875" to 0.25".
The product produced was a bulked yarn, the denier o~ which had increased over 20%, the bulking being three-dimensional.
sufficiently to set the crimp so that ~ubqequent winding tension does not pull the crimp out. ~he relaxation roller also acts as a resèrvoir to allow compensation for tension control. Due to the folding of the filaments in randomly orientated direction~
transverse to the longitudinal axis of spring 21, a three-dimensional bulking of the filaments is achieved.
A plug of filament thus remains at all times in the spring, an equilibrium being set up between the air pressure build up on the one hand, and the frict-ional forces between the spring coils and the plug.
Critical parameters in this operation to produce desired output speeds for the bulked yarn of 1000 metres/minute - with a minimum of 600 metres/minute, are the degree of taper of the spring i.e. the difference between the diamecer of the spring ends relative to the spring length, the nature of the ~pring surface, the material of the spring and the filament material.
Havln~ selectcd the above parameters to provide a given performan¢e with a particular filament materi~l, the bulking of that filament material and thus the performance of the apparatus, can be affected by change~
in the nature of the filament. For example the addition of different pigments to the same basic filament material can result in different bulking, the surface friction coefficients changing due to the addition of pigment. Such variations can be minimised to produce sub~tantially constant bulking by the uqe of a fibre lubricant e.g. Limanol P~ll manufactured by Schill 30 Scheillacher.
The invention will be further illustrated with reference to the following example:-EXAMPLE 1.
~ The procedure described above was carried out 35 using a tow of polyDropylene filaments and a transporter i4V
a~ illustrated in the draw~ng, with an air temperature of 165C and at a pres~ure of 154 p.s.i. The tow has 120 fllament~ and the polypropylene had an m.f.i. of lO and a denier per filament of 16.6. The dimen~ions of the tapered qpring forming the texturiser were as rOllOwS~
Inch rate = 0.22 lbs - wire diameter = 0.025"
free length = 2"
.. 1~ extended or working length = 2.5"
Spring diameter tapers uniformly during its length from 0.1875" to 0.25".
The product produced was a bulked yarn, the denier o~ which had increased over 20%, the bulking being three-dimensional.
Claims (12)
1. A texturising apparatus for use in producing a three-dimensionally bulked yarn, comprising a stuffer chamber to which one or more filaments of a thermoplastics material can be continuously fed, the stuffer chamber being formed by a tapered spring which is fixedly secured at each end thereof and loaded, the spring having an inlet end through which the filaments are fed, and a wider outlet end.
2. Apparatus according to claim 1, wherein the spring is tensioned between its ends.
3. Apparatus according to claim 1, wherein the spring is an open wound spring which is compressed.
4. Apparatus according to any one of claims 1 to 3, wherein the tapered spring is fixed between two planar flanges which are arranged parallel to each other, support rods interconnecting said flanges and maintaining the flanges in spaced apart relationship, the ends of the spring being secured to said flanges over coaxially aligned apertures in said flanges.
5. Apparatus according to claim 1, wherein the narrower end of the tapered spring forming the stuffer chamber, is connected to a transporter for the continuous filament or filaments.
6. Apparatus according to claim 5, wherein the transporter utilises a stream of gaseous fluid to carry the filament or filaments continuously forward.
7. Apparatus according to claim 6, wherein the gaseous fluid is dry air fed at a desired substantially constant speed.
8. A method of texturising yarn formed from one or more filaments of a thermoplastic material, said method comprising the steps of feeding one or more continuous filaments into a stuffer chamber formed by a loaded tapered, coiled spring, which chamber is maintained at an elevated temperature, and continuously folding said filament or filaments within said chamber whereby to fill at least a portion of the length of the chamber, main-taining said folded filament or filaments within said chamber for a period of time and at a temperature which sets the filament or filaments in the folded state, and allowing the yarn to spill out of the wider end of the tapered spring.
9. A method according to claim 8, wherein the filament or filaments is treated with a lubricating agent before being fed to the stuffer chamber.
10. A method according to claim 8, wherein the filament or filaments are fed to the stuffer chamber by a flow of gaseous fluid.
11. A method according to claim 10, wherein the gaseous fluid is dry air which is fed at a substantially constant speed, the temperature of the air being sufficient to supply the requisite additional heat required to set the filament or filaments, the filaments having been preheated before reaching the stuffer chamber.
12. A method according to claim 8, 9 or 10 wherein the filament or filaments are fed to the stuffer chamber at 1000 metres/min.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB8028504 | 1980-09-04 | ||
| GB8028504 | 1980-09-04 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1169640A true CA1169640A (en) | 1984-06-26 |
Family
ID=10515829
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000384879A Expired CA1169640A (en) | 1980-09-04 | 1981-08-31 | Texturising of yarn |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0049052B1 (en) |
| AT (1) | ATE11680T1 (en) |
| CA (1) | CA1169640A (en) |
| DE (1) | DE3168794D1 (en) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE613495A (en) * | 1961-02-08 | |||
| US3978560A (en) * | 1973-10-11 | 1976-09-07 | Techniservice Corporation | Strand treatment apparatus |
| DE2545590C3 (en) * | 1975-10-11 | 1985-05-09 | Bayer Ag, 5090 Leverkusen | Nozzle device for the production of textured filament yarns |
-
1981
- 1981-08-31 CA CA000384879A patent/CA1169640A/en not_active Expired
- 1981-09-01 AT AT81303978T patent/ATE11680T1/en active
- 1981-09-01 DE DE8181303978T patent/DE3168794D1/en not_active Expired
- 1981-09-01 EP EP81303978A patent/EP0049052B1/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| ATE11680T1 (en) | 1985-02-15 |
| DE3168794D1 (en) | 1985-03-21 |
| EP0049052A1 (en) | 1982-04-07 |
| EP0049052B1 (en) | 1985-02-06 |
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