US2714398A

US2714398A - Device for shifting pile warp threads laterally

Info

Publication number: US2714398A
Application number: US465645A
Authority: US
Inventors: Clarence L Morgan
Original assignee: BELRUG MILLS OF SOUTH CAROLINA
Current assignee: BELRUG MILLS OF SOUTH CAROLINA
Priority date: 1954-10-29
Filing date: 1954-10-29
Publication date: 1955-08-02
Anticipated expiration: 1972-08-02

Description

Aug. 2, 1955 c. MORGAN 2,714,398

DEVICE FOR SHIFTING PILE WARP THREADS LATERALLY Filed Oct. 29, 1954 2 Sheets$heet 1 FIG. I.

INVENTOR CLARENCE L.MORGAN BY WW ATTORNEY 5 c. L. MORGAN 2,714,398

DEVICE FOR SHIFTING FILE WARP THREADS LATERALLY Filed 001;. 29, 1954 2 SheetsSheet 2 V M a |4\ l4 2,

,z 20 I f 20 20a [/l/ll/lll l INVENTOR CLARENCE L, MORGAN ATTORNEY United States Patent DEVICE FQR SHIFTING PILE WARP THREADS LATERALLY Clarence L. Morgan, Greenville,

Mills of South Carolina, tion of South Carolina S. C., assignor to Belrug Greenville, S. (1., a corpora- My invention relates to looms and has particular reference to means to shift the selvage edge of the fabric, at the bad selvage edge, inwardly, whereby the slack in the filling is taken up.

In the manufacture of woven pile rugs, it is old to weave two rugs at the same time, and the pile of the two rugs is originally integral and is severed as the weaving of the rugs progresses. In the weaving of the two rugs, the rugs are ordinarily arranged in superposed relation and there are two sets of ground warps for each rug and two sets of pile warps which are common to the two rugs. The ground warps of each rug are manipulated by the heddles in timed order with respect to the weft of each rug, so that the ground is woven in the conventional manner. The two sets of pile warps are manipulated to form pile warp crossings and the pile warps are woven into the grounds and the pile warps form an original pile which is integral and connects the two rugs. As the two rugs being woven are advanced, the integral pile is brought into contact with severing means and the pile warp crossings are severed forming two separate rugs. In the Weaving of two rugs at the same time, with the pile warps crossings connecting the grounds of the two rugs, two shuttle boxes are arranged at the opposite ends of the lay in superposed relation and two shuttles are picked simultaneously, to form the weft for each rug. This procedure is conventional in the art, and is illustrated broadly in Patents 294,968; 1,524,398; 1,676,931; 1,757,555; 2,152,592 and 2,391,835.

As is well known in the art, difficulty is experienced in the weaving of two pile rugs simultaneously, with slack at the selvage of each rug. This slack occurs at the selvage when the weft is beaten up by the reed and this slack is caused by the fact that the pile warp crossings hold the weft spaced from the fell, adjacent to the selvage. This slack may occur at one or both of the selvage edges.

In accordance with my invention, I provide a device which is preferably mounted upon the lay to travel therewith. This device is operated in timed order with respect to the pick of the shuttles and it is movable to press against the selvage edges of the rugs being Woven and to shift these selvage edges inwardly. This occurs after the pick of the shuttle and preferably before the shuttle has traveled for more than two-thirds of the length of its pick, but may occur any time that the shuttle is in flight. The device thus moves the selvage edges inwardly and the shuttles still exerting tension upon the weft, will retain the weft fairly taut. When the lay reaches the end of its rear travel and starts forwardly, the device is moved outwardly to disengage and become spaced from the selvage edges, and the reed then packs up the weft. When the device releases the moved in selvage dges, such selvage edges return to the normal parallel outer positions and automatically take up any slack at the selvage edges.

In the accompanying drawings forming a part of this application and in which like numerals are employed to designate like parts throughout same,

Figure l is a plan view of the lay and associated ele- 2,714,398 Patented Aug. 2, 1955 ments of a loom, showing the lay starting on its rearward movement from the fell and the selvage edge shifting device retracted in the outer position,

Figure 2 is a similar view showing the lay approaching the end of its rear stroke, the shuttle approaching the end of its pick and the selvage pressing device shifted to the inner position,

Figure 3 is a side elevation device and associated elements,

Figure 4 is a side elevation of the operating means for the selvage pressing device,

Figure 5 is a diagrammatic view of the sheds of the ground warps and the pile warps, viewed from the good selvage edges of the rugs,

Figure 6 is a similar view, viewed from the bad selvage edges, with the selvage pressing device shown in a position to engage the selvages,

Figure 7 is a diagrammatic view illustrating the forma tion of the long loop at the bad selvage, in accordance with the old practice,

Figure 8 is a similar view showing the elimination of the long loop in the weft at the bad selvage, by the use of the selvage pressing device.

In the drawings, where for the purpose of illustration is shown a preferred embodiment of my invention, the numeral 10 designates a lay, equipped at each of its opposite ends with two shuttle boxes 11 arranged in spaced superposed relation. There is an upper shuttle for use with the upper pair of shuttle boxes and a lower shuttle for use with the lower pair of shuttle boxes and the shuttles are indicated at 12. The conventional means is employed to move the lay, and conventional picker sticks and operating means for the picker sticks are employed, to pick the shuttles as indicated in said patents.

The numeral 13 designates upper and lower rugs being woven, and which are being fed to the right, Figures 5 and 6, during the weaving operation. In Figures 5 and 6, the

numerals

14 and 15 designate the ground warps of the upper and lower rugs and 16 and 17 designate the pile warp forming crossings 18, which cross each other at 1.9, and cross the ground warps at Zll and 21'. The wefts are designated by the numeral 20 in the woven. rugs, and 21 designates the integral pile connecting the woven rugs before the integral pile is severed to form the complete rugs.

I provide a selvage edge pressing device to move the selvage edges or the selvage ground warps inwardly. This selvagepressing device comprises a reciprocatory rod 22, which is square in cross section and is slidable within guides 23 rigidly mounted upon the lay it). This rod cannot turn upon its longitudinal axis and moves longitudinally and is automatically moved outwardly by a compressible coil spring 24. Rigidly secured to the rod 22 is a vertical selvage pressing device or rod 25, projecting above the rod 22, and arranged to engage the selvage edges of the two rugs or the selvage ground warps. When the rod 22 is held in the outer position by the spring 24, the selvage pressing device 25 is slightly spaced from the selvage edges.

The rod 22 is moved inwardly by a flexible element or cable 26 passed about a pulley 27 mounted upon the lay 10. This cable 26 extends downwardly and is connected vsu'th one end of a vertically swinging lever 28, pivoted at 29, and carrying a cam block 30, to be operated by a roller 31, carried by a crank 32, mounted upon a pick shaft 33, which extends longitudinally of the lay, as is customary. When the roller 31 is turned counter-clockwise, Figure 4, it passes over the cam and depresses the lever 28.

The operation is as follows:

Viewed from the bad selvage edges of the rugs, which would be the left ends of Figures 1 to 3, and also Figure 6, the heddles have shifted the ground warps 14 of the selvage pressing 3 and so that they make the next cross, and the heddles have shifted the

pile warps

16 and 17 so that they make the next cross with each other and also cross the

pile warps

14 and 15, Figure 6. Figure 6 shows the relative positions of the ground warps and the pile warps and their sheds, at the time that the shuttles 12 enter the sheds, at the bad selvage edges. With the warps arranged as shown in Figure 6, the lay is moving rearwardly from the fell, and when the lay moves rearwardly for about two-thirds of its travel, the pick of the shuttles occurs. This places the weft 20 near the crossing points 20 and 21' at the bad selvage edges and spaced a considerable distance from the fell. If this is not corrected, improper slack will occur at the selvage edge. This arrangement, see more particularly Figure 7 produces a weft portion Ztia and When the reed heats up the weft, it will produce a loop 2012, extending outwardly beyond the selvage, and it is this loop which produces the improper slack. The roller 31 1s timed in operation with respect to the pick of the loom, and shortly after the pick has been made and the shuttles are in the sheds, this roller will engage the cam block and force the cam block downwardly. The downward movement of the cam block will swing the lever 28 downwardly and the downward movement of the lever pulls the cable 26, which shifts the rod 22 inwardly toward the selvage edges. The rod 22 now moves the selvage edge pressing device 25 inwardly into engagement with the selvage edges of the rugs or the selvage warp threads, moving the same inwardly for a considerable distance. The parts are so timed in operation that the rod 22 is moved inwardly and shifts the pressing device 25 inwardly to move the selvage edges or selvage edge ground warps inwardly to the fullest extent, before and about the time that the shuttle travels two-thirds of its stroke from the bad selvage edges. The shuttle is therefore still placing the weft under tension and this will draw the weft close to the selvage at the point adjacent to the pressing device 25. The pressing device 25 will remain in the inner or projected position until the lay reaches the rearmost position from the lay and when the lay moves forwardly from the rearmost position for about two-thirds of its stroke, the roller will disengage the cam block, and the spring 24 will rapidly return the bar and pressing element 25 to the outer or retracted position. The pressing device 25 is moved out of contact with the selvage edge warps and out of the path of travel of the fabric, before the reed nears the fell, and the pressing device 25 cannot be moved into contact with the fell, when the reed packs up the fell.

The shuttles 12 having been thrown from the bad selvage edges to the good selvage edges, the shuttles are caught in the shuttle boxes at the good selvage edges, and when in such shuttle boxes, the heddles are operated to cross the

ground warps

14 and 15, Figure 5, and the heddles have started to cross the

pile warps

16 and 17, and the heddles are weaving the pile warps in the grounds of the rugs or fabrics, which holds the pile warps substantially parallel, Figure 5, and when the shuttles are again picked, the shuttles travel from the good selvage edges to the bad selvage edges. Since the pile warps 16 and 17 are not now crossing, they do not hold the weft spaced from the fell, and hence the weft will be close to the fell when the shuttles are picked and when the reed beats up the weft, undue slack at the good selvage edges will not occur. After the shuttles reach the shuttle boxes at the bad selvage edges, the completion of the crossing of the pile warps 16 and 17 is made, and the ground warps are again crossed, Figures 5 and 6. It is thus seen that the ground warps are crossed for each pick, while the pile warps are crossed for each alternate pick. Upon the next pick, the shuttles again move from the bad selvage edges to the good selvage edges, and the pressing device 25 again shifts the selvage edges or selvage edge warps inwardly, and the operation is repeated, and the complete cycle of operation continued.

While I have described the invention for use in weaving pile rugs, for the purpose of illustration, I also contemplate using the same for the weaving of any pile fabric, such as plush. The device may also be used in connection with the weaving of a single pile fabric.

It is to be understood that the form of my invention herewith shown and described is to be taken as a preferred example of the same and that various changes in the shape, size and arrangement of parts may be resorted to, without departing from the spirit of the invention or the scope of the subjoined claims.

Having thus described my invention, I claim:

1. A device for use in connection with a loom for weaving two pile fabrics including ground warps and pile warp crossings connecting the fabrics, said loom including a lay, a pressing device mounted upon the lay and arranged near the selvage edges of the fabrics and movable transversely of the fabrics toward and from the selvage edges, said device including contact means arranged exteriorly of the sheds and exteriorly of the selvage edges, and means to move the pressing device inwardly and transversely of the fabrics so that the contact means engages the exterior of the selvage edges and forces them inwardly beyond the normal position so that the ground warps are bent inwardly and the fabrics have a reduced width when the pressing device is holding the selvage edges in the transverse inner position.

2. A device for use in connection with a loom for weaving two pile fabrics including ground warps and pile warp crossings connecting the fabrics, said loom comprising a lay, a supporting member mounted upon the lay and movable longitudinally thereof, a pressing device mounted upon the supporting member and arranged near and exteriorly of the selvage edges of the fabrics and exteriorly of the sheds, and means to move the supporting member inwardly toward the fabrics and to cause the pressing device to engage the exterior of the selvage edges and force them inwardly beyond the normal position so that the ground warps are bent inwardly and the fabrics have a reduced width when the pressing device is holding the selvage edges in the transverse inner position.

3. A device for use in connection with a loom for weaving two pile fabrics including ground warps and pile warp crossings connecting the fabrics, said loom including a lay, a supporting member mounted upon the lay to move longitudinally thereof, a pressing device mounted upon the supporting member and arranged near and exteriorly of the selvage edges of the fabrics and exteriorly of the sheds, a spring to move the supporting member outwardly, and means timed in operation with respect to the movement of the shuttle to shift the supporting me ber inwardly toward the fabrics and to cause the pressing device to engage the exterior of the selvage edges and force them inwardly beyond the normal position so that the ground warps are bent inwardly and the fabrics have a reduced width when the pressing device is holding the selvage edges in the transverse inner position.

4. A device for use in connection with a loom for weaving two pile fabrics including ground warps and pile warp crossings connecting the fabrics, said device comprising a member movable transversely of the selvage edges of said fabrics, means for supporting the member, a pressing element carried by the member and having contacting parts arranged exteriorly of the selvage edges and exteriorly of the sheds, said pressing element when shifted toward the selvage edges causing the contacting parts to engage the exterior of the selvage edges and force them inwardly beyond the normal position so that the ground warps are bent inwardly and the fabrics have a reduced width when the contacting parts are holding the selvage edges in the transverse inner position, and means to move the member in opposite directions.

5. A device for use in connection with a loom for weaving two pile fabrics including ground warps and pile warp crossings connecting the fabrics, said device comprising a member movable transversely of the selvage edges of the fabric and having contacting parts arranged exteriorly of the selvage edges and exteriorly of the sheds, means for supporting the member, a spring to move the member outwardly with relation to the selvage edges, a pivoted lever, connecting means between the pivoted lever and member, a cam carried by the pivoted lever, and means operated by the pick shaft of the loom to engage the cam element and move the lever, the arrangement being such that the movement of the lever is timed with respect to the pick of the shuttles, the inward movement of the member toward the selvage edges causes the contacting parts to engage the exterior of the selvage edges and move the selvage edges inwardly beyond the normal position whereby the ground warps are bent inwardly and the width of the fabrics reduced.

6. A device for use in connection with a loom for weaving two pile fabrics including ground warps and pile warp crossings connecting the fabrics, said loom including a lay, a pressing device mounted upon the lay and having contacting parts arranged exteriorly of the selvage edges of the fabrics and exteriorly of the sheds, said pressing device being movable transversely of the selvage edges, and means to move said pressing device inwardly toward the selvage edges so that said contacting parts engage the 30 exterior of the selvage edges and move them inwardly beyond their normal position to reduce the width of the fabrics.

7. The combination with a loom including a lay, of a pressing device mounted upon the lay and arranged near the selvage edge of the fabric being Woven upon the loom, said pressing device having a contacting face arranged exteriorly of the selvage edge and exteriorly of the shed, and means to move the device inwardly so that the contacting face engages the exterior of the selvage edge and moves the selvage edge inwardly beyond the normal position to shorten the width of the fabric.

8. The combination of a loom, of a pressing device arranged near the selvage edge of the fabric being woven upon the loom and including a contacting face arranged exteriorly of the selvage edge and exteriorly of the shed, and means for supporting the pressing device and moving the same inwardly toward the selvage edge and causing the contacting face to bear against the exterior of the selvage edge and move the selvage edge inwardly beyond its normal position to shorten the width of the fabric.

9. The method of weaving comprising, supporting and manipulating ground warps and wefts for producing the fabric, and exerting an inward pressure upon the exterior of the selvage edge of the fabric to move such selvage edge inwardly beyond the normal position to shorten the width of the fabric, and applying such inward pressure to the selvage edge during at least a portion of the travel of the shuttle.

References Cited in the file of this patent UNITED STATES PATENTS 2,152,592 Hardiman Mar. 28, 1939