US3242550A - Selvage yarn winding - Google Patents

Description

March 29, 1966 J. c. GAULDING SELVAGE YARN WINDING 5 Sheets-Sheet 1 Filed March 12, 1962 FIGS ' INVENTOR. JASPER C Gama/H DY I @2451 ATTORNEY J. DI Mmh 29, 1966 C GAUL NG SELVAGE YARN WINDING arm, 26m M Filed March 12, 1962 A TTORNEYS' M h 29, 19 J. GAULDING 3,242,550

SELVAGE YARN WINDING Filed March 12, 1962 3 Sheets-Sheet 3 INVENTOR. iasPE/e C GAULD/IYG BY A TTORNE YS United States Patent 3,242,550 SELVAGE YARN WENDING Jasper Q. Gauiding, Hogansviiie, Ga, assignor to Callaway Midis Company, La Grange, 6a., a corporation of Georgia Filed Mar. 12, 1962, Ser. No. 178,985 12 Claims. (Cl. 28-33) This invention relates to selvage yarn winding and more particularly to a wound package of selvage yarns for shuttleless looms and methods of and apparatus for winding such packages concurrently with a warp beaming operation.

One of the great advances in the art of weaving fabrics has been the deveiopment of the shuttleless loom. An example of a shuttleless loom is disclosed in Budzyna et al. Patent No. 2,694,123. Shuttleless looms of this type operate at high speeds and produce fabrics of good quality.

In such a shuttleless loom the yarn supply for the weft or filling threads is stationary and filling thread carriers traverse the shed rapidly carrying the filling. The weft or filling thread is inserted in the form of U-shaped or connected pairs of picks. One of the picks of each pair is inserted from one side through a shed and the other pick of the pair is inserted in the adjacent shed. These U-shaped or connected picks are sometimes described as hair pins.

When the filling threads are inserted in this manner, the selvage at one side of the fabric is perfect with no protruding ends, but ends of filling protrude from the opposite side of the fabric and there is no selvage structure there. This presents some difficulties in the making of certain types of fabrics, and, where the expense can be justified, it is possible to equip the loom with mechanisms for avoiding or minimizin the unfinished appearance of an edge of the fabric. However, for many purposes the selvageless edge of the fabric can be given adequate structural integrity by simply applying increased tension during weaving to the last few warp yarns adjacent that edge. When these yarns, herein referred to as selvage yarns, are woven under high tension, they grip the end portions or the filling threads and hold them securely in place in the fabric.

An effective way to control the tension of the selvage yarns is to dispense them from a yarn package which is separate from the warp beam. The tensions of the selvage yarns and the main body of warp yarns then may be regulated independently. One procedure that has been proposed for providing selvage yarn packages is to use plied yarns and to wind them on a selvage bobbin in an operation entirely separate from the warp beaming operation. This is not entirely satisfactory, because it is unnecessarily expensive and because it does not permit the use of sized selvage yarns comparable to the main body of warp yarns. Another procedure that has been proposed is to run unplied (singles) selvage yarns through a conventional slasher with the main body of warp yarns and then to wind the sized selvage yarns on a bobbin at the same time that the main body of warp yarns is being wound onto a loom beam. This procedure is economical and it assures that the selvage yarns will have been treated in the same manner as the main body of warp yarns.

However, ditficulties have been encountered in forming satisfactory selvage yarn packages. In order to be useful, such packages must possess a high degree of uniformity and must permit the selvage yarns to be drawn into the loom under uniform tensions.

It is an object of this invention to provide an improved yarn package that will satisfy the requirements explained 3,242,550 Patented Mar. 29, 1966 above and to provide reliable and economical methods of and apparatus for making such packages.

It is another object of this invention to provide an apparatus for winding selvage yarns concurrently with warp yarns delivered from a conventional slasher.

It is a further object of this invention to provide an apparatus for winding selvage yarns under uniform tension.

It is a still further object to provide an apparatus for winding a selvage yarn package of a plurality of selvage yarns in which each course is level.

These objects are accomplished in accordance with a preferred embodiment of the invention by an auxiliary winding mechanism which is adapted to be mounted over the delivery roll of a conventional slasher. The selvage bobbin is driven by a friction roll which contacts the yarn-carrying surface of the bobbin. A drive roller rides on the delivery roll and drives the friction roll to wind the selvage yarns at the speed of the main body of warp threads. A traverse bar reciprocates in a frame to wind a plurality, preferably four, of selvage yarns simultaneously on the bobbin. The traverse mechanism is arranged to wind each yarn in a level course which over laps the adjacent yarns slightly at opposite ends of the stroke of the traverse bar. A tension arm is provided to resist displacement of the bobbin away from the friction roller. The auxiliary winding mechanism winds 21 firm package of selvage yarns which has a flat, level profile along its entire length so that a constant tension can be applied by the loom as the selvage yarns are drawn off the bobbin.

This preferred embodiment of the invention is il lustrate-d in the accompanying drawings, in which:

FIGURE 1 is a schematic view, partly in elevation and partly in cross section, of the delivery end of a conventional slasher on which is mounted the auxiliary winding mechanism of this invention;

FIGURE 2 is a side elevational View of the winding mechanism;

FIGURE 3 is a front elevational view of the winding mechanism as seen from the right of FIGURE 2;

FIGURE 4 is a top plan view of the winding mechanism and portions of the delivery end of a conventional slasher;

FIGURE 5 is a side elevational view showing the side of the winding mechanism opposite that shown in FIG- URE 2;

FIGURE 6 is a rear elevational view of the winding mechanism mounted On the slasher, with portions of the slasher frame broken away;

FIGURE 7 is an enlarged cross-sectional view of the winding mechanism along the line 7-7 in FIGURE 6; and

FIGURE 8 is a diagrammatic view of the traverse bar mechanism and a yarn package formed on the winding mechanism of this invention.

In FIGURE 1 the reference numeral 2 designates generally the yarn treating and drying portion of a conventional slasher, which need not be described in detail here. A driven delivery rod 4 and idler rollers 6 and 8 are located in front of the section 2 for conveying size-d warp yarns 10 to a warp beam 12.. The auxiliary winding mechanism of this invention, indicated generally at 14, is secured to a crossbar 16 on the frame of the slasher and rides on the delivery roll 4.

The auxiliary winding mechanism, as shown in FIG- URES 2 to 6, is provided with side walls 18 and 20 which are secured together by bars 22 and 24. At the base of the winding mechanism 14 a drive roll 26 is mounted on a shaft 2a which extends between the side walls 18 and 20. The drive roll 26 rides on the delivery roll 4 and the roller 26 is free to rotate as it is driven by the delivery roll. The mechanism 14 is maintained in an upright position by braces 30' and 32 which are secured to the side Walls 18 and 20, respectively. The end of each brace 30 and 32 is attached to brackets 34 and 36 which are clamped to the crossbar 16. One end of the crossbar is secured in a frame member 38 and the opposite end is secured in a corresponding member on the opposite side of the slasher. The braces 3t) and 32 maintain the winding mechanism 14 in alignment with the axis of the delivery roll 4. The weight of the mechanism 14 is suflicient to maintain the drive roll 26 in contact with the delivery roll 4.

The wrap yarns It), after being treaded in the slasher portion 2, pass through a comb 4t) which maintains the yarns substantially in alignment. Selvage yarns 42, as shown in FIGURE 4, pass through the comb 40 adjacent the edge of the warp threads 10. A spacer bar 44 is mounted on the crossbar 16 above the warp threads 19 by brackets 46 at opposite sides of the slasher and guides the selvage yarns 42 into the winding mechanism.

The selvage yarns 42 pass under the spacer bar 44 and through eyelets 48 secured in a plate 59 which is mounted on a movable traverse rod 52. The threads are then wound on a bobbin 54. The bobbin 54 is in the form of a cylinder 55 with circular rims or heads 56 at opposite ends.

The bobbin 54 is rotated by a friction drum 58 mounted on a shaft 60 extending between the side walls 13 and 20. A pulley 62 is secured to one end of the shaft 66 in vertical alignment with a pulley 64 secured to the shaft 28. A belt 66 extending over the pulleys 62 and 64 forms a driving connection between the driven roller 26 and the friction drum 58. The speed ratio between the driven roller 26 and the friction drum 58 is adjusted so that the lineal surface speed of the drum is slightly greater than the surface speed of the warp delivery roll 4, so as to assure that the selvage yarns 42 will be wound tightly on the bobbin 54 to form a firm yarn package.

All four of the selvage yarns 42 are wound on a common bobbin 54. The selvage yarns are wound simultaneously on the bobbin 54 by a traverse mechanism to permit the maximum amount of yarn to be wound on a bobbin of limited diameter. The traversing mechanism is driven from the shaft 60 by means of a worm 66 which is secured on the end of the shaft 60. A worm gear 68 is mounted for rotation on a bracket 69 which is secured to an extends outwardly from the side wall 18 in position to be engaged by the worm 66. A heartshaped cam 7% is secured to the worm gear 68 and accordingly is rotated by the shaft 64) through the worm 66. A cam follower 72 is secured to the end of the traverse rod 52 and a spring 74, which is connected between the side wall 20 and the traverse rod 52, urges the follower 72 into contact with the cam 70. A guide bar 73 is secured to the traverse rod 52 and a stationary rod '75, which is secured to the side wall 18 extends through a hole in the bar 73 to provide lateral support for the free end of the traverse rod 52. The cam 79 imparts a substantially uniform reciprocating motion to the guide plate 50 and causes quick reversal of the direction of movement of the plate 50 at the ends of its path of travel.

The bobbin 54 is supported on the drum 58 by arms 76 and 78. The pivot arms 76 and 78 are journaled in brackets 82 and 84, respectively, which are secured to the side walls 18 and 20. A tube 80 extends between the pivot arms 76 and 78 and is secured at each end to the respective arm to maintain the bobbin parallel to the axis of the friction drum 58. Fittings 86 and 88 on the arms 76 and '78, respectively, detachably support in a conventional manner a removable shaft 89 upon which the hollow bobbin 54 rotates. The rims 56 extend between the respective side wall and the drum 58. While selvage yarns are being wound on the bobbin 54, the core diameter of the bobbin increases. The pivot arms --i 76 and 78 permit the expanding bobbin to rise as the selvage yarns are being wound.

The winding of selvage yarns 42 onto the bobbin 54 takes place at high speeds and the bobbin 54 must rotate rapidly. This results in a tendency of the bobbin 54 to bounce and bobble with respect to the friction drum 58, causing undesirable variations in the tension of the selvage yarns in the yarn package. To prevent rapid and uncontrolled oscillation of the bobbin 54, restraining means are provided. A friction block 9t preferably made of nylon, is secured to the end of the arm 76. This block 94} is provided with a channel 91 (FIGURE 6) for receiving a tension arm 22 pivotally mounted on the side wall 18 by a bolt 94. The free end of the arm 92 is in the form of an arch having a radius of curvature which is slightly shorter than the pivot arms 76 and '78, so that when the friction block 99 moves outwardly along the arm 92, the arm is pivoted clockwise, as viewed in FIG. 2, about the bolt 94. A tension spring 96 connected to wall 18 and to the arm 92 resists clockwise movement of the arm 92 about the pivot bolt 94.

Relative motion between the friction block and the arm 92 is resisted by friction between these parts, and the effective frictional force is of course a function of the contact pressure between the block so and the arm 92. The contact pressure is established initially by the spring 96, but, thereafter, movements of the friction block 90 result in drag forces that beneficially affect con tact pressure. In this connection, attention is directed to the distinctive location of the pivot bolt 94 for the arm 92 at a point below and to the side of the block 90 opposite that engaged by the arm 92. With this arrangement, the drag forces created during upward movement of the block 90 relative to the arm 92 serve to increase the contact pressure between these parts, but the drag forces created during downward movement of the block 90 serve to decrease the contact pressure. A stabilizing effect results, and bouncing of the bobbin 54 during high speed winding operations is prevented.

Traverse winding of a single thread usually produces a yarn package which has a curved profile. The diame ter of the package is considerably smaller on the ends of the bobbin than it is along the intermediate portion of the package. If a plurality of yarns are wound next to each other on the same bobbin, the same variations in diameter would occur and the profile of the yarn package would show considerable variations of diameter along the length of the spool, the smallest diameters occuring at the junctions of the zones occupied by adjacent yarns. A bobbin wound in this pattern cannot be used for dispensing selvage yarns in a shuttleless loom, since the tension of the yarns passing to the loom must be uniform and constant. The tension of the yarns is controlled by applying a braking torque to the selvage bobbin as the yarns are unwound by the delivery means of the loom. Since the torque on the bobbin is proportional to the distance between the yarn and the center of the bobbin, an uneven yarn profile will cause the tension in the yarn to increase and then decrease as the yarn is unwound and traverses from one side of the other. This variation in tension is intolerable in high speed shuttleless looms, since the shed is very small, and if the selvage yarns sag, they are likely to be snagged and broken by the filling carrier as it enters the shed.

In order to provide a yarn package of a plurality of selvage yarns in which the package has a straight and level profile, special attention must be given to the end portions of the zones occupied by the several yarns on bobbin. The heart-shaped cam 70, through its quick reversing action, prevents the building up of excessive quantities of thread at the ends of the zones, but this alone is not sufficient to take care of the juncture line between zones. Hence, this invention provides for a slight overlap during winding of the selvage yarns. Referring to FIGURES 7 and 8, the selvage yarns 42 from the slasher pass through eyelets 48 in the guide plate 50 mounted on the traverse rod 52. The selvage yarns then pass between the bobbin 54 and the friction drum 58, as shown in FIG. 7. By rotating the bobbin at the point that the yarns are wound on the bobbin, the tension in the selvage yarns is constant and does not depend on the radial distance between the center of the bobbin and the yarn. The cam 70 is arranged to move the traverse rod through a distance which is slightly more than one quarter of the length of the bobbin 54 for each half revolution of the cam. The extreme right-hand movement is shown in solid lines and the extreme lefthand movement is shown in phantom lines in FIGURE 8. The overlap is somewhat exaggerated in this view for the purpose of illustration. The extent of overlap depends on the size of the yarns being used, and it has been found in practice that an overlap of approximately two thread diameters is sufiicient to provide a uniform yarn package. The eyelets 48 and the cam 70 guide the outside selvage threads beyond the ends of the bobbin in the extreme position of the guide plate St The rims 56 guide the yarns to the extreme ends of the yarn package to fill in voids which would cause the diameter of the package to decrease at the ends. Thus, the rims 56 ensure the formation of a yarn package which is level at both ends. A partially wound yarn package is illustrated in FIGURES 3, 4 and 6. The yarn is exaggerated in size to show the arrangement of four adjacent traverse wound yarns. It will be seen from the profiles of these yarn packages, however, that the diameter of each course of thread is substantially constant along the length of the spool.

In conventional shuttleless looms, it is customary to use six selvage yarns for holding the protruding ends of the filling yarns. It has been found that due to the improved tension control which is possible with a level wound bobbin, only four selvage yarns from a package produced in accordance with this invention are sufficient to hold the protruding ends. Consequently, fifty percent longer lengths of selvage yarns can be wound on the same size bobbin as on the conventional six-yarn package. This reduces the down time of the loorn and the slasher by one third over that required with six selvage yarns.

The production of selvage yarn packages along with warp yarns on the slasher ties the available quantities of selvage yarn packages to the warp beams which are produced simultaneously. Usually three packages of fourstrand selvage yarn are required for each warp beam. It is important, therefore, that the yarn packages be of consistently good quality since it would be costly to have to throw away a poorly wound selvage yarn package. The auxiliary winding mechanism of this invention consistently winds 21 selvage yarn package which is tightly wound, in which the threads are under a constant tension and which has a level profile for uniform tension control during let ofi.

While the invention has been illustrated and described in one embodiment, it is recognized that variations and changes may be made therein without departing from the invention as set forth in the claims.

I claim:

1. In a slasher of the type having apparatus for treating warp yarns and for beaming the treated warp yarns, an auxiliary winding mechanism for winding a plurality of selvage yarns on a bobbin comprising an auxiliary frame, means mounting the frame on the slasher, means for rotatably mounting a bobbin on the frame, means for rotating the bobbin to wind the selvage yarns thereon, guide means mounted for reciprocation longitudinally of the bobbin an having longitudinally spaced elements for guiding individual ones of said selvage yarns passing to the bobbin, and means for longitudinally reciprocating said guide means over a distance slightly greater than the distance between adjacent ones of said elements.

2. In a slasher of the type having apparatus for treating warp yarns and for beaming the treated warp yarns, an auxiliary winding mechanism for winding a plurality of selvage yarns on a bobbin comprising an auxiliary frame, means mounting the frame on the slasher, means for rotatably mounting a bobbin on the frame, means for rotating the bobbin to wind the selvage yarns thereon, guide means mounted for reciprocation longitudinally of the bobbin and having longitudinally spaced elements for guiding individual ones of said selvage yarns passing to the bobbin, and means including a heart-shaped cam for longitudinally reciprocating said guide means over a distance slightly greater than the distance between adjacent ones of said elements.

3. In a slasher of the type having apparatus for treating warp yarns and for beaming the treated warp yarns, an auxiliary winding mechanism for winding a plurality of selvage yarns from the slasher on a bobbin comprising an auxiliary frame, means mounting the frame on the slasher, means for rotatably mounting a bobbin on the frame, means for rotating the bobbin, a traverse plate having eyelets therein each adapted to receive one of the selvage yarns, and means for reciprocating the plate through a distance greater than the proportionate length of the bobbin for each selvage yarn to wind successive courses of yarns, whereby the opposite ends of each course of yarn are at substantially the same radial distance from the center of the bobbin as are the intermediate portions of said course of yarn.

4. In a slasher of the type having apparatus for treating warp yarns and for beaming the treated warp yarns, an auxiliary winding mechanism for winding a plurality of selvage yarns from the slasher on a bobbin comprising an auxiliary frame, means mounting the frame on the slasher, means for rotatably mounting a bobbin on the frame, means for rotating the bobbin, a traverse plate having eyelets therein each adapted to receive one of the selvage yarns, and means including a hearts-shaped cam for reciprocating the plate through a distance greater than the proportionate length of the bobbin for each selvage yarn to wind successive courses of yarns, whereby the opposite ends of each course of yarn are at substantially the same radial distance from the center of the bobbin as are the intermediate portions of said course of yarn.

5. Auxiliary winding apparatus for winding selvage yarns separately from warp yarns after treatment in a slasher of the type having a treatment chamber, a delivery roll and warp beaming appartus comprising a frame, means for supporting the frame, a drive roller on the frame in engagement with the delivery roll, a friction drum mounted for rotation in the frame, means forming a driving connection between the drive roller and the friction drum for driving the friction drum at a surface speed slightly greater than the surface speed of said delivery roll, means mounting a bobbin in engagement with the drum for rotation thereby, and means for guiding selvage yarns between the bobbin and the drum whereby they are wound at substantially the same rate as the warp yarns and under substantial tension.

6. Auxiliary winding apparatus for winding selvage yarns separately from warp yarns after treatment in a slasher of the type having a treatment chamber, a delivery roll and warp beaming apparatus comprising a frame, means for supporting the frame, a drive roller on the frame in engagement with the delivery roll, a friction drum mounted for rotation in the frame, means forming a driving connection between the drive roller and the friction drum for driving the friction drum at a surface speed slightly greater than the surface speed of said delivery roll, means mounting a bobbin in engagement with the drum for rotation thereby, means for guiding selvage yarns from the slasher to the bobbin and means for yieldably urging the bobbin against the drum whereby the yarns are wound under constant tension.

7. Auxiliary winding apparatus for winding selvage yarns separately from warp yarns after treatment in a slasher of the type having a treatment chamber, a delivery roll and Warp beaming apparatus comprising a frame, means for supporting the frame, a drive roller on the frame in engagement with the delivery roll, a friction drum mounted for rotation in the frame, means forming a driving connection between the drive roller and the friction drum, a pair of arms mounted on the frame for swinging movement, means on said arms for rotatably mounting a bobbin in position to contact said drum, one of said arms having a friction block secured thereto, a tension arm having one end pivotally mounted on the frame and having its free end portion in engagement with the friction block, said free end portion having a radius of curva ture less than the length of the friction block arms, and means for yieldably resisting pivoting movement of the tension arm.

8. Auxiliary winding apparatus for winding selvage yarns separately from warp yarns after treatment in a slasher of the type having a treatment chamber, a delivery roll and warp beaming apparatus comprising a frame, means for supporting the frame, a drive roller on the frame in engagement with the delivery roll, a friction drum mounted for rotation in the frame, means forming a driving connection between the drive roller and the friction drum, means mounted on the frame for swinging movement, means on said last-mentioned means for rotatably mounting a bobbin in position to rest on said drum, one of said arms having a friction block secured thereto, an arm having one end pivotally mounted on the frame and having its free end portion in engagement with the friction block, said arm being mounted for pivotal movement about an axis located below said friction block and laterally beyond the side of the friction block opposite from the side contacted by the free end portion of said arm, and means for yieldably urging said arm against said friction block.

9. In high speed winding apparatus having a frame, a driven roll on said frame, and means for movably mounting a rotatable bobbin on said frame so that its yarn-receiving surface rests against said driven roll, the improvement which comprises a first friction member mounted for bodily movement with said bobbin, and a second friction member contacting said first friction member and being mounted for swinging movement relative to said frame about an axis located below said first friction member and laterally beyond the side of said first friction member opposite from the side contacted by said second friction member.

10. Winding apparatus comprising a frame, a horizontal driven roll on said frame, arm means mounted on said frame for vertical swinging movement for rotatably supporting a bobbin in position for the yarn-receiving portion of the bobbin to rest upon and be driven by said driven roll, means for guiding yarn to said bobbin, a nylon block on said arm means remote from the axis of swinging movement thereof, said block having a vertical groove in the face thereof remote from the pivot axis of said arm means, a member having one end portion pivoted on said frame at a location below said block and laterally beyond said block in a direction toward the pivot axis of said arm means and having its other end portion extending through said groove in said block, said other end portion of said member being curved in a vertical plane and having a radius of curvature no greater than the radius of swinging movement of said block about the pivot axis of said arm means, and spring means for urging said other end portion of said member into contact with said block.

11. Auxiliary winding apparatus for winding selvage yarns separately from warp yarns after treatment in a slasher of the type having a treatment chamber, a delivery roll and warp beaming apparatus comprising a frame, means for supporting the frame, a bobbin mounted for rotation on the frame, means forming a driving connection between the delivery roll and the bobbin, means for guiding selvage yarns to the bobbin and means for reciprocating the guiding means through a distance greater than the proportionate length of the bobbin for each selvage yarns to spirally wind the yarns on the bobbin, said reciprocating means being driven by the bobbin driving means.

12. In apparatus for winding a plurality of first yarns on a beam of the type wherein the beam is rotated and the first yarns are fed along adjacent paths past and in engagement with a delivery roll and thence to the beam and wherein the rotation of the beam will simultaneously take up the first yarns and wherein said delivery roll is rotated as said yarns are passed by it, the combination therewith of an auxiliary winding mechanism including a rotatable bobbin, a friction drum driven from said delivery roll for engaging the periphery of said bobbin to rotate said bobbin, and means for guiding yarn to said bobbin for take-up around the periphery of said bobbin when said bobbin is rotated by said friction drum.

References Cited by the Examiner UNITED STATES PATENTS 450,259 4/1891 Simon 28-33 585,878 7/1897 Schaum 2833 592,592 10/1897 Morse 242l66 630,611 8/1899 Knapp 2833 653,832 7/1900 Tymeson et al. 242166 719,330 1/1903 Hansen 24235.5 1,586,767 6/1926 Abbott 2837 2,345,538 3/ 1944 Lewis 242--42 2,635,820 4/1953 Cochran 242-18 2,694,848 11/1954 Chaya 28--32 2,946,526 7/1960 Kuroiwa et al. 242-18 FOREIGN PATENTS 781,684 3/1935 France. 165,941 7/ 1921 Great Britain.

DONALD W. PARKER, Primary Examiner.

RUSSELL C. MADER, Examiner.

I. PETRAKES, Assistant Examiner.

Claims (1)

1. IN A SLASHER OF THE TYPE HAVING APPARATUS FOR TREATING WARP YARNS AND FOR BEAMING THE TREATED WARP YARNS, AND AUXILIARY WINDING MECHANISM FOR WINDING A PLURALITY OF SELVAGE YARNS ON A BOBBIN COMPRISING AN AUXILIARY FRAME, MEANS MOUNTING THE FRAME ON THE SLASHER, MEANS FOR ROTATABLY MOUNTING A BOBBIN ON THE FRAME, MEANS FOR ROTATING THE BOBBIN TO WIND THE SELVAGE YARNS THEREON, GUIDE MEANS MOUNTED FOR RECIPROCATION LONGITUDINALLY OF THE BOBBIN AN HAVING LONGITUDINALLY SPACED ELEMENTS FOR GUIDING INDIVIDUAL ONES OF SAID SELVAGE YARNS PASSING TO THE BOBBIN, AND MEANS FOR LONGITUDINALLY RECIPROCATING SAID GUIDE MEANS OVER A DISTANCE SLIGHTLY GREATER THAN THE DISTANCE BETWEEN ADJACENT ONES OF SAID ELEMENTS.

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