US2788634A - Twist arrestors for yarn twisters - Google Patents
Twist arrestors for yarn twisters Download PDFInfo
- Publication number
- US2788634A US2788634A US584503A US58450356A US2788634A US 2788634 A US2788634 A US 2788634A US 584503 A US584503 A US 584503A US 58450356 A US58450356 A US 58450356A US 2788634 A US2788634 A US 2788634A
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- US
- United States
- Prior art keywords
- twist
- bundle
- arrestors
- roller
- yarn
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01H—SPINNING OR TWISTING
- D01H13/00—Other common constructional features, details or accessories
- D01H13/08—Twist arresters
Definitions
- This invention relates to a twist-arresting device for use with uptwisters or downtwisters and has for an object to provide a device of the above type having novel and improved characteristics.
- the twist given to the filament bundle has a tendency to feed back along the bundle.
- the twist In order to limit this feeding back of the twist it is common practice to cause the bundle to slide over one or more fixed edges or surfaces or to follow a sinuous path on a contact device, or to make a turn around one or more idler rollers in order to arrest the feed of the twist at the desired point.
- twist arresting device introduces a supplemental tension which in the case of an uptwister increases the tension on the filaments and in the case of a downtwister decreases the filament tension.
- the present invention provides a twist arresting device consisting of a freely rotating member having a series of edges, for example a polygonal member. This member, due to its rotation, does not create any complementary tension in the filament bundle and the edges engage the bundle to stop the back feeding of the twist.
- the number of faces and therefor the number of edges of the polygonal member may vary.
- a triangular, square, hexagonal or octagonal member may be used.
- the accompanying drawing shows one form of the device as used on an uptwister and on a downtwister.
- Fig. 1 is a diagrammatic view showing the device applied to an uptwister
- Fig. 2 is a similar view showing the device applied to a ring twister
- Fig. 3 is a detail view showing on a large scale the behaviour of the bundle while passing around the twist arrestor.
- Fig. 4 is a view similar to Fig. 1 showing an uptwister provided with two twist arrestors for each spindle.
- a spool 2 is shown as mounted on a rotative spindle 3 of an uptwister having a rotating guide 4 through which the filament bundle 5 passes as it is unwound from the spool 2. Above the guide 4 the bundle 5 passes around the triangular portion 7 of an idler pulley '6 which is mounted to turn with the rotating guide 4.
- the rotating edges A, B and C of the idler pulley 6 arrest the twist in the same way as a fixed edge but without creating a complementary tension in advance of the roller as the said edges are a part of a freely rotating member.
- Fig. 2 shows a downtwister comprising a rotating spindle 9 having a ring 10 carrying a traveler 11 of the usual form.
- the filament bundle 13 passes around a roller 6 of the type previously described for arresting the twist, then through an axial guide 12 and through traveler 11 to the rotating spindle 9.
- the bundle is twisted by the ring twister as it is wound onto the spindle 9.
- the twist however cannot pass the triangular idler roller 6 and is thus confined to the yarn below the idler.
- idler pulley 6 in Fig. 4 is fixed on the rotating guide 4 as in Fig. 1 to stop the twist and prevent it from feeding back along the bundle.
- Idler pulley 6a rotates about a fixed axis.
- the device of Fig. 4 confines the twist to a very small part of the bundle equivalent to the distance between the triangular idler rollers 6 and 6a. A very regular and a high twist can thus be produced.
- a twist arrestor for yarn twisters having twisting means to impart a twist to a bundle of filaments comprising an idler roller around which said bundle passes in advance of the twisting means, said roller being polygonal in cross section with a plurality of flat sides intersecting in angular edges, said edges being in contact with said bundle and being adapted to arrest the twist without introducing complementary tension to said bundle.
- a twist arrestor ts set forth in claim 3 having a second twist arrestor comprising an idler roller of polygonal cross section mounted to rotate about a fixed axis and spaced from said first roller to provide a twisting zone therebetween.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
Description
April 16, 1957 H. cRouzET TWIST ARRESTORS FOR YARN TWISTERS Filed May 14, 1956 INVENTOR. /'/E/V,/ (190025 r ATTORNEY United States Patent TWIST ARRESTORS FOR YARN rwrsrnns Henri Crouzet, Roanne, France, assignor to Ateliers Roannais de Constructions Textiles, Roanne, France, a limited liability company of France Application May 14, 1956, Serial No. 584,503
Claims priority, application France June 6, 1955 6 Claims. (Cl. 57-106) This invention relates to a twist-arresting device for use with uptwisters or downtwisters and has for an object to provide a device of the above type having novel and improved characteristics.
When a twist is given to a filament bundle on an uptwister, that is a device where the feeding spool rotates, or on a downtwister, such as a ring twister or belt spindle where the winding spool rotates, the twist given to the filament bundle has a tendency to feed back along the bundle. In order to limit this feeding back of the twist it is common practice to cause the bundle to slide over one or more fixed edges or surfaces or to follow a sinuous path on a contact device, or to make a turn around one or more idler rollers in order to arrest the feed of the twist at the desired point.
In all these cases the twist arresting device introduces a supplemental tension which in the case of an uptwister increases the tension on the filaments and in the case of a downtwister decreases the filament tension.
It is accordingly a further object of this invention to provide a device for arresting the back feeding of the twist without creating an appreciable complementary tension, either positive or negative.
The present invention provides a twist arresting device consisting of a freely rotating member having a series of edges, for example a polygonal member. This member, due to its rotation, does not create any complementary tension in the filament bundle and the edges engage the bundle to stop the back feeding of the twist.
The number of faces and therefor the number of edges of the polygonal member may vary. For example, a triangular, square, hexagonal or octagonal member may be used.
It is of course possible to use for the twist arresting one or more idler rollers of the above shape, around which the bundle passes. This bundle may make a fraction of a turn or a complete turn or several turns on said idler rollers.
The accompanying drawing shows one form of the device as used on an uptwister and on a downtwister.
In the drawings:
Fig. 1 is a diagrammatic view showing the device applied to an uptwister;
Fig. 2 is a similar view showing the device applied to a ring twister;
Fig. 3 is a detail view showing on a large scale the behaviour of the bundle while passing around the twist arrestor; and
Fig. 4 is a view similar to Fig. 1 showing an uptwister provided with two twist arrestors for each spindle.
2,788,634 Patented Apr. 16, 1957 Referring to Fig. 1 a spool 2 is shown as mounted on a rotative spindle 3 of an uptwister having a rotating guide 4 through which the filament bundle 5 passes as it is unwound from the spool 2. Above the guide 4 the bundle 5 passes around the triangular portion 7 of an idler pulley '6 which is mounted to turn with the rotating guide 4.
The rotating edges A, B and C of the idler pulley 6 arrest the twist in the same way as a fixed edge but without creating a complementary tension in advance of the roller as the said edges are a part of a freely rotating member.
Fig. 2 shows a downtwister comprising a rotating spindle 9 having a ring 10 carrying a traveler 11 of the usual form. The filament bundle 13 passes around a roller 6 of the type previously described for arresting the twist, then through an axial guide 12 and through traveler 11 to the rotating spindle 9.
In this embodiment the bundle is twisted by the ring twister as it is wound onto the spindle 9. The twist however cannot pass the triangular idler roller 6 and is thus confined to the yarn below the idler.
It is of course possible to use two or several idler rollers in series as shown in Fig. 4. The idler pulley 6 in Fig. 4 is fixed on the rotating guide 4 as in Fig. 1 to stop the twist and prevent it from feeding back along the bundle. Idler pulley 6a rotates about a fixed axis.
The device of Fig. 4 confines the twist to a very small part of the bundle equivalent to the distance between the triangular idler rollers 6 and 6a. A very regular and a high twist can thus be produced.
Other embodiments will be apparent to a person skilled in the art.
What is claimed is:
1. A twist arrestor for yarn twisters having twisting means to impart a twist to a bundle of filaments, comprising an idler roller around which said bundle passes in advance of the twisting means, said roller being polygonal in cross section with a plurality of flat sides intersecting in angular edges, said edges being in contact with said bundle and being adapted to arrest the twist without introducing complementary tension to said bundle.
2. A twist arrestor as set forth in claim 1 in which said roller is triangular in cross section.
3. A twist arrestor as set forth in claim 1 in which said twisting means comprises an uptwister having a rotating yarn guide, and said idler roller is mounted to turn with said guide.
4. A twist arrestor ts set forth in claim 3 having a second twist arrestor comprising an idler roller of polygonal cross section mounted to rotate about a fixed axis and spaced from said first roller to provide a twisting zone therebetween.
5. A twist arrestor as set forth in claim 1 in which said twisting means comprises a downtwister and said roller is mounted in advance of said twister to rotate about a fixed axis whereby the twist is confined to a zone between said roller and said downtwister.
6. A twist arrestor as set forth in claim 5 in which said twister is a ring twister.
No references cited.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR2788634X | 1955-06-06 |
Publications (1)
Publication Number | Publication Date |
---|---|
US2788634A true US2788634A (en) | 1957-04-16 |
Family
ID=9688761
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US584503A Expired - Lifetime US2788634A (en) | 1955-06-06 | 1956-05-14 | Twist arrestors for yarn twisters |
Country Status (1)
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US (1) | US2788634A (en) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3153891A (en) * | 1960-10-19 | 1964-10-27 | Glanzstoff Ag | Process and apparatus for crimping a multi-filament yarn |
US3212251A (en) * | 1962-11-27 | 1965-10-19 | American Cyanamid Co | Process for making synthetic paper yarn |
US3330104A (en) * | 1964-09-30 | 1967-07-11 | Du Pont | False twist spindle with auxiliary reverse-twist element |
US3396523A (en) * | 1965-02-27 | 1968-08-13 | Scragg & Sons | Apparatus for twisting yarn |
US3422613A (en) * | 1967-05-08 | 1969-01-21 | Turbo Machine Co | Yarn assembly apparatus for false twisting yarn |
US3777465A (en) * | 1969-12-12 | 1973-12-11 | Rhodiaceta | Process and apparatus for manufacture of a thermoplastic yarn with residual twist |
US3782091A (en) * | 1972-02-03 | 1974-01-01 | R Spurgeon | Texturing yarns by false twisting |
US5665293A (en) * | 1996-03-08 | 1997-09-09 | Basf Corporation | Method of making spun yarn packages multiple individually separable yarn ends |
CN103757774A (en) * | 2014-01-07 | 2014-04-30 | 太仓市世博纺织配件有限公司 | Rapid changing mechanism for twist stopper on texturing machine |
-
1956
- 1956-05-14 US US584503A patent/US2788634A/en not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
None * |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3153891A (en) * | 1960-10-19 | 1964-10-27 | Glanzstoff Ag | Process and apparatus for crimping a multi-filament yarn |
US3212251A (en) * | 1962-11-27 | 1965-10-19 | American Cyanamid Co | Process for making synthetic paper yarn |
US3330104A (en) * | 1964-09-30 | 1967-07-11 | Du Pont | False twist spindle with auxiliary reverse-twist element |
US3396523A (en) * | 1965-02-27 | 1968-08-13 | Scragg & Sons | Apparatus for twisting yarn |
US3422613A (en) * | 1967-05-08 | 1969-01-21 | Turbo Machine Co | Yarn assembly apparatus for false twisting yarn |
US3777465A (en) * | 1969-12-12 | 1973-12-11 | Rhodiaceta | Process and apparatus for manufacture of a thermoplastic yarn with residual twist |
US3782091A (en) * | 1972-02-03 | 1974-01-01 | R Spurgeon | Texturing yarns by false twisting |
US5665293A (en) * | 1996-03-08 | 1997-09-09 | Basf Corporation | Method of making spun yarn packages multiple individually separable yarn ends |
CN103757774A (en) * | 2014-01-07 | 2014-04-30 | 太仓市世博纺织配件有限公司 | Rapid changing mechanism for twist stopper on texturing machine |
CN103757774B (en) * | 2014-01-07 | 2016-01-20 | 太仓市世博纺织配件有限公司 | The quick-change mechanism of twist arrester on elasticizer |
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