US3790996A - Yarn guiding apparatus - Google Patents

Yarn guiding apparatus Download PDF

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Publication number
US3790996A
US3790996A US00288417A US3790996DA US3790996A US 3790996 A US3790996 A US 3790996A US 00288417 A US00288417 A US 00288417A US 3790996D A US3790996D A US 3790996DA US 3790996 A US3790996 A US 3790996A
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US
United States
Prior art keywords
yarns
shaped member
cylinder
axis
arms
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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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US00288417A
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English (en)
Inventor
A Marchand
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.)
IC-ACBF
Ateliers Roannais de Constructions Textiles SA
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Ateliers Roannais de Constructions Textiles SA
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Publication of US3790996A publication Critical patent/US3790996A/en
Assigned to IC-ACBF reassignment IC-ACBF ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: ASA, BY: DUTILLEUL, CLAUDE (COURT TRUSTEE')
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H57/00—Guides for filamentary materials; Supports therefor
    • B65H57/26—Supports for guides
    • 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

  • apparatus for guiding two yarns over a curved surface is combined with a yarn drawing machine including feed rollers, take-up rollers and an intermediate cylindrical stretching element, thereby permitting two yarns to be drawn at the same drawing station.
  • a yarn drawing machine including feed rollers, take-up rollers and an intermediate cylindrical stretching element, thereby permitting two yarns to be drawn at the same drawing station.
  • One or a pair of guide arms, each having a guide opening for a yarn at either end, are arranged relative to the cylindrical element to pass the yarns over the element in two spaced planes.
  • the arms and the cylindrical element are pivotable one relative to the other to shift, e.g., interchange, the loci of the yarns on the element.
  • the guide arms are pivoted while the cylindrical element is held stationary, and in another the cylindrical element is pivoted while the arms remain fixed.
  • they may be placed on opposite sides of the cylindrical element to guide the yarns in their approach to and departure from the cylindrical element.
  • the present invention relates generally to apparatus for passing two yarns over an element having a curved surface and, more particularly, to guiding apparatus for drawing synthetic yarns.
  • one of the drawing devices can be a rotating heating cylinder of the multiturn type, equipped with a return roller, the yarn making one or more turns around the combination of heating cylinder and return roller.
  • the yarn which breaks is the one situated at the front or outside location, that is to say that which passes in the plane situated nearest to the free end of the cylinder, it is sufficient to restart this yarn, taking care obviously to avoid it affecting the passage of the other yarn.
  • this broken yarn presents the risk of becoming entangled with its neighbours and thus of causing the whole lot to-break; and secondly, and most importantly, it is necessary to stop the whole unit in order to proceed with repairs and a new start.
  • the present invention relates to apparatus for passing two yarns over one and the same curved, e.g., cylindrical, element, which may or may not rotate, in which, in the case of breakage of one of the two yarns, it is not necessary to stop the unit to remove and restart the yarn which broke.
  • a representative embodiment constructed in accordance with the invention includes'a cylindrical component over which two yarns pass in two parallel planes, which planes are substantially perpendicular to the axis of the cylindrical component, and at least one guide arm carrying at both of its ends a means of guiding each of the two yarns.
  • the guide arm is positioned in such a way that the two parallel planes of the cylinder in which the yarns pass, i.e., the planes generally containing the yarns as they pass over the cylinder, are spaced apart relative to one another along the axis of the cylinder, and such that each yarn is presented tangentially on either side of the cylinder.
  • the device is characterized further in that the cylindrical component and the guide arm can pivot relative to one another about the same axis to shift the loci of the yarns on the cylindrical component.
  • the guide arm and the cylindrical component preferably pivot about an axis formed by the intersection of the plane in which the yarns lie as they approach the cylindrical component with the plane which passes through the axis of the cylinder in a direction parallel to the direction of forward movement of the yarns.
  • the invention includes two pivotally mounted guide arms which are parallel and located on either side of the cylinder, preferably symmetrically. In this way, each yarn is guided before and after its passage over the cylinder, which makes it easier to position the yarn.
  • Significant advantages over the prior art are also realized, however, if only one guide arm is employed.
  • the cylindrical element can be a cylinder forming the engagement component of a machine for drawing synthetic yarns, and may be either fixed or rotatable and heated or unheated. In this way, it is possible to use a single stretching finger for two yarns.
  • the guide arm or arms are fixed and the cylinder'pivots about the axis formed by the intersection of the plane in which the yarns pass with the plane passing through the axis of the cylinder in a direction parallel to the direction of forward movement of the yarns.
  • This embodiment makes it possible to keep the yarns in a fixed position relative to the delivering elements and thus to have constantengagements on the yarns.
  • FIG. 1 represents a perspective view of an embodiment of the invention, with pivoting arms;
  • FIG. 2 is a horizontal view of the embodiment of FIG. 1, taken along the line 2-2;
  • FIG. 3 is a perspective view of a second embodiment according to the invention, with a pivoting cylinder
  • FIGS. 4A and 4B are partial horizontal views taken along the line 44 of FIG. 3, with parts omitted for clarity.
  • a cylinder 10 which may be fixed or may be able to rotate and which may or may not be heated, is mounted, by means of a shaft 12, on a generally U-shaped member 14.
  • the member 14 is supported in the axis of the cylinder by a cross bar 16 of a frame (not shown) of a conventional machine for drawing synthetic yarns.
  • the arms 18 and 20 of the U-shaped member 14 are situated in a vertical plane passing through the axis of the cylinder 10 and are respectively placed so that one 18 is above the cylinder and the other 20 below. Close to their free ends, the arms 18 and 20 carry two pivoting pins 22 and 24 which are aligned in the same vertical plane.
  • Another generally U-shaped member 26 is positioned outside the U-shaped member 14, relative to the cylinder, and possesses two arms 28 and 30.
  • the arms 28 and 30 are pivotally mounted on the pins 22 and 24, respectively.
  • the outer U-shaped member 26 can pivot relative to the inner U-shaped member 14, which is rigidly fixed to the cross bar 16 of the frame.
  • the upper arm 28 of member 26 is firmly fixed to a double yarn guide arm 32.
  • the lower arm 30 is similarly fixed to another double yarn guide arm 34 which is identical to the first.
  • the yarns 36 and 38 pass through two open eyelet-holes 40 and 42, of suitable shape and nature, situated at the respective ends of the arm 32.
  • the yarns pass through two open eyelet-holes 44 and 46.
  • the guide arms 32 and 34 are so arranged that the eyelet-holes 40 and 44, on the one hand, and the eyelet-holes 42 and 46, on the other, are vertically above one another.
  • the member comes to rest against the cross bar 16, thus defining two stable positions which are symmetric relative to the axis of the cylinder l0.
  • the eyelet-holes 40 and 44 define the passage at the front for one yarn 36
  • the eyelet-holes 42 and 46 define the passage at the back for the other yarn 38, as seen by an operator looking straight at the cylinder 10 from the left hand side of FIG. 1.
  • the upper arm 28 carries a pivot pin 48 which is pivotally engaged by collar 50 attached to one end of a rod 52.
  • the opposite end of the rod 52 passes through an opening in a bar 54 which is firmly fixed to the frame (not shown) of the machine.
  • a compression spring 56 is positioned over the rod 52 and bears against the collar 50 at one end and a detent 58 at the other.
  • the detent is suitably apertured to slidingly receive the rod 52 and, on the side thereof facing the bar 54, is formed with a generally spherically-shaped bearing surface. (See FIG. 2)
  • the opening in bar 54 through which the rod 52 passes is correspondingly shaped to provide a spherical seat for the detent 58.
  • the yarn 38 drawn by the drawing unit, or feed rollers, 60 is inserted into the eyelet-hole 42 situated at the back.
  • the operator causes it to make one or more turns on the cylinder 10 in the clockwise direction, and then inserts the yarn at the outlet into the eyelet-hole 46 which is directly below the hole 42.
  • the yarn 38 is then drawn by the drawing unit, or take-up rollers, 62, the controlled speed of which is greater than that of the unit 60 and in a ratio such as to cause the desired stretching or drawing of the yarn.
  • the yarn 36 drawn by the drawing unit, or feed rollers, 64 is passed through the eyelet-hole 40 situated at the front.
  • the operator causes it to make one or more turns on the cylinder 10 in the anti-clockwise direction and inserts the yarn at the outlet into the eyelet-hole 44 which is directly below eyelet-hole 40.
  • the yarn 36 is then drawn by the unit, or takeup rollers, 66, the controlled speed of which is also greater than that of the unit 64 to cause stretching of the yarn.
  • the upper feed units 60 and 64 are driven at the same speed, and the take-up units 62 and 66 are driven at the same faster speed, so as to stretch the two yarns in the same ratio.
  • the operator pivots the U-shaped member 26.
  • the turn or turns of the yarn 36 placed at the front of the cylinder 10 slide towards the back and take up the position which those of the yarn 38 occupied before the breakage.
  • the eyelet-holes 42 and 46 come to the front during pivoting of the member 26 and it suffices to restart the yarn 38 as explained above.
  • the turn or turns of the yarn 38 then take up the position on the cylinder 10 which the turn or turns of the yarn 36 occupied previously.
  • FIGS. 3, 4A and 4B illustrate another embodiment of the invention, this time with a pivoting cylinder.
  • Like components are indicated by like primed numbers and, except as otherwise noted, will be understood to function in the same manner as in the embodiment of FIGS. 1 and 2.
  • the guide arms 32' and 34 carrying at their ends the eyelet-holes 4046' for guiding the yarns 36 and 38, are fixed, i.e., the U-shaped member 26' is rigidly attached to the cross bar 16', and the cylinder It) is arranged to pivot about the axis formed by the intersection of the plane in which the yarns 36' and 38' lie and the plane which passes through the axis of the cylinder parallel to the direction of forward movement of the yarns.
  • the inner U-shaped member 14' is pivotally supported within the outer U-shaped member 26 by means of the pins 22' and 24. It is moved between its rest positions (illustrated respectively in full lines in FIGS. 4A and 4B) in order to bring the eyelet-holes 40 and 44 and yarn 36', on the one hand (FIG. 4A), or eyelet-holes 42' and 46 and yarn 38, on the other (FIG. 4B), to the front.
  • one of the arms 18 and of the U-shaped member 14' may be extended in the forward direction to facilitate pivoting of the member 14', and hence of the cylinder 10', by the operator.
  • the cylinder 10' may be positioned at its rest positions by stops 68 and 70 (FIG. 3) carried by the cross bar 16'.
  • the rod 52' may thus extend through an opening in the U-shaped member 26', which serves as a seat for the spherically-shaped detent 58.
  • a compression spring 56' is constrained between the detent 58' and a collar 50' fixed to the opposite end of the rod 52'.
  • the collar 50 may be pivotally secured to the upper arm 18' of the U-shaped member 14' by a pivot pin 48', so that the spring 58 urges the member 14' against the stops 68 and 70 to hold the cylinder 10' in the proper rest positions.
  • the yarns 36' and 38' are drawn by the drawing units 60'-66' and passed through the eyelet-holes 40'-46 and around the cylinder 10 in the same manner as in the embodiment of FIGS. 1 and 2. They are likewise restarted if broken in the same manner as previously explained, except, of course, that the cylinder 10 rather than the outer U-shaped member 26 is pivoted to move the broken back yarn to the front position.
  • the yarn guides situated at the end of the guide arms preferably are driven in conventional fashion with a slight secondary reciprocating movement in a substantially perpendicular plane relative to the direction of forward movement of the yarns. This is done in order to avoid wear of the cylinder in one spot and to minimize abrasion of the yarns.
  • apparatus constructed according to the invention is particularly advantageous for stretching synthetic yarns because, without excessive alteration of existing material and by means of an apparatus which is simple to construct and easy to use, it is possible to treat two yarns simultaneously at a single drawing station and thus considerably to decrease the investment in future installations and to increase the profitability of those already in existence.
  • this device can be used for other purposes than stretching synthetic yarns without going outside the scope of the present invention.
  • it can be used successfully with any type of treatment which is applied to yarns of any nature, and in which one or two yarns are passed over at least one curved surface which may or may not be rotated and which may or may not be heated. All such modifications and variations of the invention, and of the particular embodimentsdescribed above, are therefor encompassed within the spirit and scope of the appended claims.
  • Apparatus for simultaneously drawing two yarns comprising means forming a curved surface over which the yarns are to be passed, feed rollers for feeding the yarns to the curved surface, take-up rollers for taking up the yarns after their passage over the curved surface, the take-up rollers being driven faster than the feed rollers so as to draw the yarns by a desired amount, each of the yarns engaging the curved surface and being disposed substantially in a plane, the two planes containing the yarns being spaced apart from each other, means for guiding the first yarn, means for guiding the second yarn, and means for shifting the relative positions of the curved surface-forming means and the first and second guide means so as to shift the loci of the first and second yarns on the curved surface.
  • each of the first and second guide means includes a pair of spaced yarn guiding elements, the paired guide elements being disposed on opposite sides of the curved surface forming means.
  • the curved surface is a cylindrical surface
  • the curved surface forming means is cylinder means
  • the two planes containing the two yarns are substantially perpendicular to the axis of the cylinder means.
  • Apparatus according to claim 4 in which the cylinder means is mounted to prevent pivoting about'an axis perpendicular to the axis of the cylinder means, and the shifting means shifts the first and second guide means in generally opposite directions.
  • the shifting means comprises a generally U-shaped member disposed with the arms thereof on opposite sides of the cylinder means and pivoted for rotation about the same axis as the first and second guide means-carrying arms, the first and second guide means-carrying arms being mounted on the respective arms of the U-shaped member for rotation therewith.
  • the shifting means further comprises means for releasably holding the U-shaped member, and thus the guide meanscarrying arms, in two rotational positions relative to the cylinder means, each rotational position corresponding to particular loci of the first and second yarns on the cylinder means, whereby upon pivoting of the U- shaped member from one rotational position to the other the loci of the first and second yarns on the cylinder means are reversed.
  • the shifting means further comprises a second generally U- shaped member disposed within the first U-shaped member, means carried by the second U-shaped member for supporting the cylinder means between the arms thereof, means supporting the second U-shaped member so as to prevent pivoting thereof about an axis perpendicular to the axis of the cylinder means, and means carried by the arms of the second U-shaped member for pivotally supporting thereon the first U- shaped member.
  • Apparatus according to claim 10 further comprising first and second feed rollers for feeding the first and second yarns to the cylinder means and first and second take-up rollers for taking up the first and second yarns after their passage over the cylinder means.
  • Apparatus according to claim 12 in which the first and second guide means are disposed at least in part at opposite ends of an arm fixed against rotation about an axis substantially perpendicular to the axis of the cylinder means.
  • first and second guide means are further disposed at opposite ends of a second arm fixed against rotation about an axis substantially perpendicular to the axis of the cylinder means, and the first and second arms are disposed on opposite sides of the cylinder means.
  • the shifting means comprises a generally U-shaped member disposed with the arms thereof on opposite sides of the cylinder means and pivoted for rotation about an axis substantially perpendicular to the axis of the cylinder means, and means carried by the U-shaped member for supporting the cylinder means for rotation therewith.
  • the shifting means further comprises means for releasably holding the U-shaped member, and thus the cylinder means, in two rotational positions relative to the guide means-carrying arms, each rotational position corresponding to particular loci of the first and second yarns on the cylinder means, whereby upon pivoting of the U-shaped member from one rotational position to the other the loci of the first and second yarns on the cylinder means are reversed.
  • the shifting means further comprises a second generally U- shaped member disposed around the first U-shaped member, the arms of the second U-shaped member carrying the first and second guide means-carrying arms, means supporting the second U-shaped member so as to prevent pivoting thereof about an axis perpendicular to the axis of the cylinder means, and means carried by the arms of the second U-shaped member for pivotally supporting thereon the first U-shaped member.

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  • Treatment Of Fiber Materials (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
US00288417A 1971-09-23 1972-09-12 Yarn guiding apparatus Expired - Lifetime US3790996A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7134349A FR2153786A5 (enrdf_load_stackoverflow) 1971-09-23 1971-09-23

Publications (1)

Publication Number Publication Date
US3790996A true US3790996A (en) 1974-02-12

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Application Number Title Priority Date Filing Date
US00288417A Expired - Lifetime US3790996A (en) 1971-09-23 1972-09-12 Yarn guiding apparatus

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US (1) US3790996A (enrdf_load_stackoverflow)
JP (1) JPS4841015A (enrdf_load_stackoverflow)
CH (1) CH555901A (enrdf_load_stackoverflow)
CS (1) CS168006B2 (enrdf_load_stackoverflow)
DE (1) DE2246201C3 (enrdf_load_stackoverflow)
FR (1) FR2153786A5 (enrdf_load_stackoverflow)
GB (1) GB1396017A (enrdf_load_stackoverflow)
IT (1) IT965442B (enrdf_load_stackoverflow)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9110564U1 (de) * 1991-08-27 1991-12-05 Hacoba Textilmaschinen Gmbh & Co Kg, 5600 Wuppertal Rollenbremse für Textilfäden

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2455173A (en) * 1946-05-25 1948-11-30 Du Pont Yarn treating apparatus
US2975474A (en) * 1958-06-11 1961-03-21 Du Pont Process and apparatus for preparing novelty yarns
US3137033A (en) * 1960-10-07 1964-06-16 Algemene Kunstzijde Unie Nv Apparatus for drawing thread-shaped products
US3395524A (en) * 1965-07-28 1968-08-06 Zinser Textilmaschinen Gmbh Method and apparatus for the production of crimped yarns

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2455173A (en) * 1946-05-25 1948-11-30 Du Pont Yarn treating apparatus
US2975474A (en) * 1958-06-11 1961-03-21 Du Pont Process and apparatus for preparing novelty yarns
US3137033A (en) * 1960-10-07 1964-06-16 Algemene Kunstzijde Unie Nv Apparatus for drawing thread-shaped products
US3395524A (en) * 1965-07-28 1968-08-06 Zinser Textilmaschinen Gmbh Method and apparatus for the production of crimped yarns

Also Published As

Publication number Publication date
CH555901A (fr) 1974-11-15
JPS4841015A (enrdf_load_stackoverflow) 1973-06-16
DE2246201A1 (de) 1973-04-12
FR2153786A5 (enrdf_load_stackoverflow) 1973-05-04
IT965442B (it) 1974-01-31
DE2246201B2 (de) 1975-01-09
DE2246201C3 (de) 1975-08-21
GB1396017A (en) 1975-05-29
CS168006B2 (enrdf_load_stackoverflow) 1976-05-28

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