US2517021A - Apparatus for producing tubular fabrics - Google Patents

Description

Aug. 1, 1950 s. P. PARKER APPARATUS FOR PRODUCING TUBULAR FABRICS mv N OR 5mg )5 1% Ms M "M ATTORNEYS Patented Aug. 1, 1950 UNITED STATES PATENTOFFICE a I 2,517,021 APPARATUS FOR PRODUCING TUBULAR FABRICS I S amuel P. Parker, .La Grange, Ga., assignor to H a Callaway Millsflompany, La Grange, Ga., a

corporation of Georgia Application February 5, 1949, Serial No. 74,836

This invention relates fabrics, in which a filling yarn is interwoven in upper and lower levels alternately with warp yarns. More particularly, the invention i concerned with a novel loom for weaving tubularfabrics, which are of uniform width and devoid of thick places along the selvages. r

In the weaving of ordinary tubular fabrics, as now commonly carried on, the loom used has four harnesses operated to form successive sheds, in each of which half of the warp yarns that are to lie in one level of the fabric are in one part of the shed and the remaining warp yarns are in the other part. The shuttle carrying the filling yarn passes through the successive sheds from opposite sides in alternation to insert picks and, at each point of entry of the filling yarn into a shed, it is looped about the warp yarn at outer edge of the sheet of warp yarns. After insertion of a pick, the lay swings toward the fell and the reed beats up the pick. In the beat-up, the tension on the filling yarn is such that that yarn crowds together the warp yarns at the side of th loom, where the filling loop was formed. As a result, the fabric is drawn in, so that its width is less than the distance between the end dents of the reed and is likely to be non-uniform, and the fabric has thick places along its selvages, because of the greater density of warp yarns at the edges of the fabric, resulting from their being crowded together.

The present invention is directed to the provision of a loom for weaving tubular fabrics, which are of uniform width and are free of thick places along the selvages.

For a better understanding of the invention, reference may be made to the accompanying drawing, in which:

Fig. 1 is a diagrammatic longitudinal sectional view of a loom embodying the invention;

Fig. 2 is a fragmentary plan View showing features illustrated in Fig. 1;

Fig. 3 is a fragmentary rear elevational view of a bar employed in the loom of Fig. 1; and

Fig. 4 is a plan view of the bar shown in Fig. 3.

In the loom, of which parts are shown in the drawing, the warp yarns and 2 are those interwoven with a filling yarn in the lower level of the tubular fabric, while warp yarns 3 and 4 are interwoven with the filling yarn in the upper level of the fabric. The warp yarns pass through a reed 5 carrying a cap 6 and mounted on a lay I, and the fabric passes over a breast beam 8 and a sand roll 9 to a cloth roll, not shown. The warp yarns are formed into sheds by conventional 3 Claims. (Cl. 139-495) to the weaving of tubular harness mechanism indicated diagrammatically at In and lying between the reed 5 and lease rods, of which one is shown at l I, r

A bar l2, preferably of light metal, is disposed within the fabric just beyond the fell, and the bar has a length measured transversely of the warp, which is approximately that of the; fabric at full width. Attached to each end of the bar is a wire I3, which extends warpwise and passes through the dent in reed 5;lying just ouside the dent, through which passes the outermost warp yarn. Each wire passes through a slot. I4 in the 'end of the bar and the end 0f the wire is secured by a screw IE to the edge of the bar away from the reed. Each wire passes from the bar through an eye in a heddle IS in a harness and its end is attached to one end of a coil spring II, the other end of which is attached to a fixed part of the loom, such as a cross-bar I 8 extending between the loom sides.

In the operation of the loom, in accordance with the invention, the warp yarns are formed into successive sheds by operation of the harnesses I I]. In each shed, part of the warp yarns to lie in one level of the fabric are separated from the remaining warp yarns, and the shuttle is passed through the sheds from opposite sides of the loom alternately to insert picks IQ of the filling. The harness controlling wires l3 are raised and lowered alternately to place the wires alternately in the top and bottom of the shed, and, as a result, the filling I9 is always passed around a wire 13, as it leaves the shuttle box and enters the shed of the warp. Thus, each loop A of the filling at the selvage of the goods embraces a wire l3. The wires are maintained taut by their springs l1, and, as each pick is beaten up by movement of the lay l and reed 5 to the positions indicated in dotted lines at la and 5a, the drawing-in action of the filling because of its tension is resisted by the wire I3, about which the selvage loop of the filling passes.

In its extreme position at beat-up, the reed lies spaced slightly from the edge of bar l2, so that the bar lies within the fabric inwardly from the fell. The tube of fabric between the fell and the adjacent edge ofthe bar is held at full width by the wires l3, so that the filling under tension is unable to draw in the fabric. As a result, the fabric is maintained at all times at full and uniform width and there is no crowding together of the warp yarns at the edges of the fabric and no thick places in the fabric.

I claim:

1. In a loom for weaving a tubular fabric of a filling yarn interwoven in upper and lower levels alternately with warp yarns, the loom having harness mechanism for forming successive sheds of the Warp yarns and a reed for beating up picks of filling, the combination of a bar disposed transversely within the fabric adjacent the fell to; hold the fabric to full width, a pair of parallel wires extending Warpwise through the reed and attached to respective ends of the bar,

springs attached to the ends of the Wires remote from the bar and connected'to. a fixed part of the loom structure, and means for raising the wires into the upper part of the shed and lowering the Wires into the lower part of the shed upon successive shedding operations of the harness mechanism.

2. In a loom for Weaving a tubular fabric of} a filling yarn interwoven in upper and lower levels alternately with warp yarns, the loom having harness mechanism for forming successivesheds of the warp yarns and a reedforbeating up picks of filling, the combination-ofa bar disposed transversely withinthe fabric adjacent the fell to hold" the fabric to full'width, means for holding-the barin place Warpwise, said means including a pair of parallelwires extending warpwisethrough the reed andconnected to the bar at its ends andresilient means attached to the ends of the wires remote from the bar, and a harness having eyes, through Which the-Wires pass, and operating to-raiseand lower the Wires, as the harness mechanism forms successive sheds.

3. In a loom for weaving a tubular fabric of a filling yarn inter-woven in upper and lower H 4 levels alternately with warp yarns, the loom having harness mechanism for forming successive sheds of the warp yarn and a reed for beating up picks of filling, the combination of a bar disposed transversely within the fabric adjacent the fell to engage the fabric and hold it to full width, means for holdingflthe barinvplace warp- Wise, saidmeans including a pair of parallel wires connected to the bar at its ends and extending warpwise through the reed and resilient means connecting the ends of the wires remote from the bar to a fixed part of the loom, and a harness having eyes, through which the wires pass, andoperating to raise and lower the wires, as the; harness: mechanism forms successive sheds.

SAMUEL P. PARKER.

REFERENCES CITED The following references are of record in, the file of this patent:

UNITED. STATES, PATENTS

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