US3279670A - Device for equalizing the tension in a filament - Google Patents
Device for equalizing the tension in a filament Download PDFInfo
- Publication number
- US3279670A US3279670A US430364A US43036465A US3279670A US 3279670 A US3279670 A US 3279670A US 430364 A US430364 A US 430364A US 43036465 A US43036465 A US 43036465A US 3279670 A US3279670 A US 3279670A
- Authority
- US
- United States
- Prior art keywords
- yarn
- tension
- cylinder
- arc
- equalizing
- 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
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H59/00—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators
- B65H59/10—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators by devices acting on running material and not associated with supply or take-up devices
- B65H59/18—Driven rotary elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H59/00—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators
- B65H59/10—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators by devices acting on running material and not associated with supply or take-up devices
- B65H59/20—Co-operating surfaces mounted for relative movement
- B65H59/26—Co-operating surfaces mounted for relative movement and arranged to deflect material from straight path
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2701/00—Handled material; Storage means
- B65H2701/30—Handled filamentary material
- B65H2701/31—Textiles threads or artificial strands of filaments
Definitions
- Fluctuations of the tension in a yarn during winding result in irregularities in the product obtained, and many devices are known for equalizing this tension.
- a supply cylinder rotating at a peripheral velocity higher than the winding speed of the yarn and about which the latter passes.
- the cylinder thus tends to drive the yarn continuously and to supply it to the winding members almost without tension.
- This device has the disadvantage that it possesses no means of adjustment.
- the yarn passes round a portion of the periphery of a roller driven at a peripheral velocity higher than the speed at which the yarn is travelling, and a current of air is provided to lift the yarn from the roller.
- the force exerted by the current of air on the yarn tends to reduce the arc embraced by the yarn on the roller, while increase of the tension in the yarn as it leaves the device tends to increase the arc embraced.
- the change in the length of the arc embraced produces a change in the frictional forces between the yarn and the roller, which results in a regularisation of the tension in the filament as it leaves the device.
- This device operates perfectly only with low yarn tensions.
- a device for automatically equalizing the tension in a travelling yarn comprises a cylinder adapted to be rotated at a peripheral speed greater than the rate of travel of the yarn and in the same direction, yarn guide means positioned to cause the yarn to travel through at least one arc in contact with the surface of the cylinder and including at least one movable yarn guide mounted so as to be moved by an increase in the tension of the yarn in a direction which increases the length of at least one are over which the yarn makes contact with the cylinder, and return means tending to move the said movable guide in a direction which decreases the length of the said arc.
- the device comprises two movable yarn guides.
- the movable yarn guide or guides are each mounted at or towards the end of a bar pivoted about a point between its two ends, and the return means operate on each bar on the other side of the pivot.
- the return means comprises a spring.
- the return means may comprise a single spring acting on both bars, e.g., a tensioned spring joining the two bars. It may be convenient to use curved bars one on either side of the rotating cylinder, the curvature being suflicient to keep them out of contact with the cylinder.
- the surface of the guide with which the yarns make contact will usually be such as to reduce friction to a minimum; thus it may be provided by a freely running pulley.
- FIGURE 1 is a diagrammatical lateral view illustrating one form of yarn tension equalizing device
- FIGURE 2 is a similar view illustrating another form of such device.
- the device of FIGURE 1 comprises a cylinder 1 which is rotated at a peripheral velocity higher than the speed of travel of the yarn, two yarn guides 2 and 2 each comprising a freely running pulley mounted at the end of a curved bar 3, 3, the bar 3 being adapted to pivot about a point 4 and the bar 3' about a point 4'.
- the other ends of the said bars i.e., the ends remote from the yarn guides 2 and 2) are connected by a spring 5 working in tension.
- the path of the yarn is indicated at 6.
- the device of FIGURE 2 comprises, in addition to the same elements as that of FIGURE 1, two fixed y-arn guides 7 and 7'.
- the device of the invention is thus self-adjusting, and makes it possible to maintain a uniform tension in the travelling yarn.
- the value of this tension may be ad justed in various Ways, notably by varying the return force of the spring 5, an increase of which produces an increase in the tension, or by varying the surface state of the cylinder 1 or by changing the material of which it is made, whereby the coefficient of friction between the yarns and the cylinder, and consequently the tension in the yarn for a given ratio of a cylinder speed to yarn speed, is changed.
- the spring working in tension may be replaced by any other equivalent system, e.g., by a spring working in flexure, in torsion or in compression,.a counter-weight, a pneumatic jack, or a magnetic or electromagnetic device of the plunger type or the repulsion type.
- a device for automatically equalizing the tension in a travelling yarn comprising a cylinder adapted to be rotated at a peripheral speed greater than the rate of travel of the yarn and in the same direction, yarn guide mean positioned to cause the yarn to travel through at least one are in contact with the surface of the cylinder and including at least one movable yarn guide mounted so as to be moved by an increase in the tension of the yarn in a direction which increases the length of at least one arc over which the yarn makes contact with the cylinder, and return means tending to move the said movable guide in a direction which decreases the length of the said arc.
- each movable yarn guide is mounted on a bar pivoted at a point between its two ends, and the return means operates on the bar the other side of the pivot.
- a device comprising two yarn guides and a tension spring joining the two bars as the return means.
- each yarn guide comprises a freely rotatable pulley adapted to make contact with the travelling yarn.
- a device for automatically equalizing the tension in a travelling yarn comprising a cylinder adapted to be rotated at a peripheral speed greater than the rate of travel of the yarn and in the same direction, yarn guide means positioned to cause the yarn to travel through at least one are in contact with the surface of the cylinder and including two movableyarn guides, each comprising a freely rotatable pulley mounted at one end of a bar pivoted at a point between its two ends, the said bars being joined beyond the said pivots by a tension spring, the arrangement being such that in operation the yarn between the movable yarn guides traverses at least one are on the cylinder, and that an increase in the tension in the yarn causes the movable yarn guides to move towards each other and so increase the distance over which the yarn make contact with the cylinder.
Landscapes
- Forwarding And Storing Of Filamentary Material (AREA)
- Tension Adjustment In Filamentary Materials (AREA)
- Treatment Of Fiber Materials (AREA)
- Spinning Or Twisting Of Yarns (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR963519A FR1399596A (fr) | 1964-02-12 | 1964-02-12 | Dispositif pour régulariser la tension d'un fil |
Publications (1)
Publication Number | Publication Date |
---|---|
US3279670A true US3279670A (en) | 1966-10-18 |
Family
ID=8822994
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US430364A Expired - Lifetime US3279670A (en) | 1964-02-12 | 1965-02-04 | Device for equalizing the tension in a filament |
Country Status (8)
Country | Link |
---|---|
US (1) | US3279670A (de) |
BE (1) | BE659604A (de) |
CH (1) | CH411656A (de) |
DE (1) | DE1560593B1 (de) |
ES (1) | ES309282A1 (de) |
FR (1) | FR1399596A (de) |
GB (1) | GB1063761A (de) |
NL (1) | NL6501711A (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2001094247A2 (en) * | 2000-06-08 | 2001-12-13 | Dupont-Toray Company, Ltd | Apparatus and methods for feeding yarn |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19635373C2 (de) * | 1996-08-31 | 2000-08-03 | Saechsisches Textilforsch Inst | Vorrichtung zum Ausgleichen von Fadenverbrauchs- und Fadenspannungsschwankungen bei der Zuführung von fadenförmigem Material |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1752604A (en) * | 1927-02-28 | 1930-04-01 | Western Electric Co | Material-feeding apparatus |
US2854197A (en) * | 1955-06-08 | 1958-09-30 | Soroban Engineering Inc | Idler wheel for tape drive mechanisms |
US3114512A (en) * | 1961-07-31 | 1963-12-17 | Prec Instr Company | Low power tape drive mechanism |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE581859C (de) * | 1930-07-16 | 1933-08-03 | Henri Jaboulay | Fadenspannvorrichtung |
US2160495A (en) * | 1938-05-12 | 1939-05-30 | Us Rubber Co | Mechanism for supplying a thread under uniform tension |
GB551828A (en) * | 1941-09-09 | 1943-03-11 | Courtaulds Ltd | Improvemetns in and relating to thread-tensioning apparatus |
GB722348A (en) * | 1952-04-28 | 1955-01-26 | Rawson And Sons Ltd J | Improvements in and relating to the winding of yarn and the like |
CH361764A (de) * | 1955-12-23 | 1962-04-30 | Reiners Walter Dr Ing | Aufwickelvorrichtung für Fadenscharen |
DE1147705B (de) * | 1957-09-05 | 1963-04-25 | Morat Gmbh Franz | Fadenliefervorrichtung fuer Strick- und Wirkmaschinen |
US3093330A (en) * | 1960-04-11 | 1963-06-11 | Morat Gmbh Franz | Feeding mechanism for yarn winding and processing machines |
-
1964
- 1964-02-12 FR FR963519A patent/FR1399596A/fr not_active Expired
-
1965
- 1965-01-27 GB GB3668/65A patent/GB1063761A/en not_active Expired
- 1965-02-04 US US430364A patent/US3279670A/en not_active Expired - Lifetime
- 1965-02-11 DE DE19651560593D patent/DE1560593B1/de active Pending
- 1965-02-11 BE BE659604A patent/BE659604A/xx unknown
- 1965-02-11 NL NL6501711A patent/NL6501711A/xx unknown
- 1965-02-12 CH CH190065A patent/CH411656A/fr unknown
- 1965-02-12 ES ES0309282A patent/ES309282A1/es not_active Expired
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1752604A (en) * | 1927-02-28 | 1930-04-01 | Western Electric Co | Material-feeding apparatus |
US2854197A (en) * | 1955-06-08 | 1958-09-30 | Soroban Engineering Inc | Idler wheel for tape drive mechanisms |
US3114512A (en) * | 1961-07-31 | 1963-12-17 | Prec Instr Company | Low power tape drive mechanism |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2001094247A2 (en) * | 2000-06-08 | 2001-12-13 | Dupont-Toray Company, Ltd | Apparatus and methods for feeding yarn |
WO2001094247A3 (en) * | 2000-06-08 | 2002-06-06 | Du Pont | Apparatus and methods for feeding yarn |
Also Published As
Publication number | Publication date |
---|---|
GB1063761A (en) | 1967-03-30 |
NL6501711A (de) | 1965-08-13 |
ES309282A1 (es) | 1965-06-01 |
DE1560593B1 (de) | 1971-07-01 |
BE659604A (de) | 1965-08-11 |
CH411656A (fr) | 1966-04-15 |
FR1399596A (fr) | 1965-05-21 |
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