US2896671A

US2896671A - Apparatus for weaving loop pile fabrics

Info

Publication number: US2896671A
Application number: US572657A
Authority: US
Inventors: Orrin J Park; Basil U Cotner
Original assignee: Magee Carpet Co
Current assignee: Magee Carpet Co
Priority date: 1956-03-20
Filing date: 1956-03-20
Publication date: 1959-07-28
Anticipated expiration: 1976-07-28

Description

O. J. PARK ET AL APPARATUS FOR WEAVING LOOP PILE FABRICS Filed Marcfi 20, 1956 2 Sheets- 1 HIE: I

INVENTQRS .BA lL u. com

ATTORNEY July 28, 1959 o. J. PARK ET AL APPARATUS FOR WEAVING LOOP PILE FABRICS Filed March 20, 1956 2 Sheets-Sheet 2 INVENTQRS 1 ORRIN J. PARK 8| BASIL u, COTNER ATTORNEY iii! APPARATUS FOR WEAVING LOOP PILE FABRICS Orrin J. Park and Basil U. Cotner, Bloomsburg, Pa., as-

signors to The Magee Carpet Company, Bloomshnrg, Pa., a corporation of Pennsylvania Application March 20, 1956, Serial No. 572,657

10 Claims. (Cl. 139-46) This invention relates to apparatus for weaving a loop pile fabric with longitudinal gauge wires.

It is an object of the invention to provide a mechanism incorporated in aloom having a series of longitudinal gauge wires for moving the pile yarns back and forth across the gauge wires and down into and out of the ground warps whereby the pile yarns are looped over the gauged wires to form rows of pile loops.

A further object of the invention resides in providing a pile weaving mechanism having a series of pile carrying needles or arms mounted above the gauge wires of a loom to swing downwardly and upwardly between the gauge wires with means for shifting the needles laterally to carry the pile yarns back and forth across the gauge wires to form pile loops.

Another object of the invention resides in providing mechanism of the above-mentioned character which is simple and compact in construction, reliable and efiicient in operation and which may be readily incorporated in a conventional loom.

Other objects and advantages of the invention will be apparent during the course of the following description.

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

Fig. l is a vertical sectional view of the pile weaving mechanism,

Fig. 2 is a fragmentary top plan View of the mechanism,

Fig. 3 is a fragmentary perspective view showing more clearly the manner of mounting the pile carrying arms in the supporting bar, and,

Fig. 4 is an elevational sectional view through a section of the fabric.

Referring to the drawings wherein for the purpose of illustration a preferred example of the invention is shown the numerals 5 and 6 indicate the ground warps of the fabric being woven which are threaded respectively through the eyes of the heddles 7 and 8 Which are operated by suitable mechanism for shedding the said warps so that they may be interwoven with the weft threads 9 inserted by the usual needle 10.

Disposed in a plane above the ground warps of the woven fabric are a series of fixed gauge wires 11 extending in a direction warpwise of the fabric and in spaced parallel relation. The gauge wires are supported by a cross bar 12 attached to the lower edge of a slide rail 13 and are removably secured in place by a clamping plate 14 and set screws 15. The gauge wires extend forward from the loom through the dents of the reed 16 and at their free ends are of a height corresponding to the height of the pile loops to be formed. The loop forming portion 11 of the gauge wires at its inner end is formed with a shoulder 17 which prevents the loops from sliding back on the gauge wires.

The slide rail 13 extends transversely of the loom forward of the heddles and is attached to the loom frame.

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A reciprocating slide bar 18 is slidably mounted in a groove 19 formed in the front face of the slide rail being held in place by

removable retainer bars

20 and 21 attached to the slide rail by the bolts 22 and 23.

A rotatable shaft 24 is mounted in bearing lugs 25 attached to the slide bar 18 by bolts 18 and attached to one end of said shaft is a bell crank 26 connected with suitable timing mechanism for imparting an oscillating movement to said shaft. A series of hangers 27 are keyed on the shaft 24 at spaced apart intervals by keys 29, the lower ends 28 of said hangers being of angular shape to receive the

needle supporting bars

29 and 34 mounted in superposed relation. The top bar 29 is rigidly secured to the hangers by bolts 31 and the lower bar 30 is attached to the hangers by bolts 32. The rear edge of lower bar 30 is provided with a series of spaced slots 30' to receive the upper ends of needle arms 33 which are removably retained in the slots by a clamping bar 34 attached to the rear edge of upper bar 29 by bolts 35. The inner face of the clamping bar 34 is provided with a projecting rib 36 adapted to engage in notches 3'7 formed-in the rear edge of the needle arms. Upward movement of the needle arms is limited by the top bar 29. The pile yarns 37 leading from a source of supply such as a creel are trained over a guide roll 36' above the needle arms and are threaded through the eyes 33 in the lower ends of the needle arms 33. Upon oscillation of the shaft 24 the needle arms swing down and up between the gauge wires to carry the pile yarn down into and out of the ground warps in synchronism with the movements of the heddles and weft needle during the Weaving of the fabric.

The slide bar 13 is reciprocated by a cam wheel 39 mounted on a shaft 40 which engages one end of the slide bar which has its opposite end under the pressure of a coil spring 41. Reciprocation of the slide bar 18, when the needle arms are in raised position, moves the needle bars across the gauge wires and the movement is timed so that the needle arms swing down on one side of the gauge wires and then on the other side so as to carry the pile yarns to and fro in a weftwise direction across the gauge wires to form pile loops 42.

In operation, the heddles 7 and 8 are operated to raise and lower the ground warps 5 and 6 to form a shed below the level of the gauge wires 11. Then the needle arms 33 carrying the pile yarns 37' are swung downwardly between the gauge wires by rotation of shaft 24 until the needle arms are back of the path of movement of the weft needle 10 whereupon a pair of weft threads are inserted in the shed. After insertion of the weft threads the needle arms are swung upwardly above the gauge wires while the reed 16 moves forwardly to beat up the weft into the fabric. The slide bar 18 is then reciprocated to move the needle arms weftwise of the fabric to carry the pile yarns across the gauge wires and then the needle arms are swung downwardly on the opposite sides of the gauge wires to carry the pile yarns down into the ground warps to be tied into the ground by insertion of the next shot of weft threads after the position of the ground warps have been shifted by operation of the heddles to form the next shed. Thus, it is seen the carrying of the pile yarns to and fro across the gauge wires forms a row of pile loops corresponding in height to the height of the loop forming portion of the gauge wires. As the fabric moves forward in the usual manner the loops move off the ends of the gauge wires and the resulting fabric will have rows of pile loops with every other loop in a warpwise row being twisted, as shown in Fig. 4. The alternate twisted loops results from the to and fro movement of the twisted yarn and the tendency of twisted yarn to resist movement in a direction reverse to the direction of the original twist.

Having thus described our invention, we claim:

1. A loom attachment for weaving pile fabrics comprising in combination with a loom, a series of gauge wires mounted onthe loom and extending parallelto the warps a reciprocating bar mounted above said gauge wires for movement transversely of said wires, a shaft rotatably mounted on said bar in parallel relation thereto, a series of pile carrying needles extending from said shaft, and means for oscillating said shaft to swing said needles into and out-of the warp.

,2. A loom attachment for weaving pile fabrics as described in claim 1 including means for removably mounting said pile carrying needles on said shaft.

3. A loom attachment for weaving pile fabrics comprising in combination with a loom, a series of gauge Wires mounted on the loom and extending parallel to the warps, a reciprocating bar mounted above said gauge wires for movement transversely of said wires, means for reciprocating said bar, a shaft rotatably mounted on said bar in parallel relation thereto and a series of pile carrying arms carried by said shaft for swinging movement to carry the pile yarn into and out-of the warps.

4. A loom attachment for weaving pile fabrics comprising in combination with a loom, a series of gauge wires mounted on the loom and extending parallel to the warps, a reciprocating slide bar mounted above said gauge wires for movement transversely of said wires, a rotatable shaft extending longitudinally of said bar and mounted thereon, hangers fixed on said shaft, a supporting bar carried by said hangers, a series of pile carrying arms mounted in said supporting bar, means for oscillating said shaft to vertically move said arms between said gauge wires to carry the pile yarn into and out-of the warps and means for reciprocating said slide bar.

5. A loom attachment for weaving pile fabrics comprising in combination with a loom, a slide rail mounted on the loom above and transversely of the warps, a series of gauge wires attached to the lower edge of said rail and extending parallelto the warps, a slide bar mounted in said slide rail, means for reciprocating said slide bar, a rotatable shaft extending longitudinally of said slide bar and mounted thereon, hangers fixed on said shaft, a supporting bar carried by said hangers, a series of pile carrying arms mounted in said supporting bar and means for oscillating said shaft to swing said arms between said warps.

6. A loom attachment for weaving pile fabrics comprising in combination with a loom, a series of gauge wires mounted on the loom and extending parallel to the warps, a rotatable shaft mounted above and extending across said gauge wires, a slide bar supporting said shaft movable transversely of said gauge Wires, means for reciprocating said slide bar, hangers fixed on said shaft, a supporting bar carried by said hangers, a scrim of pile carrying arms mounted in said supporting bar and means for oscillating said shaft to vertically move said arms between said gauge wires to carry the pile yarn into and out-of the warps.

7. A loom attachment for weaving pile fabrics comprising in combination with a loom, a slide rail mounted on the loom above and transversely of the warps, a series of gauge wires attached to the lower edge of said rail and extending therefrom in the direction of the warps, a series of pile carrying needles mounted on said slide rail for movement in a weftwise direction across said gauge wires, said needles being mounted to swing into and outof the warps.

8. A loom attachment for Weaving pile fabrics as described in claim 7 including means for reciprocating said needles in a weftwise direction.

9. A loom attachment for weaving pile fabrics as described in claim 7 including means for swinging said needles.

10. A loom attachment for weaving pile fabrics as described in claim 7 including means for reciprocating said needles in a Weftwise direction and means for swinging said needles.

References Cited in the file of this patent UNITED STATES PATENTS 608,226 Sargent et al. Aug. 2, 1898 791,678 Dustin June 6, 1905 2,353,968 Pedrazzo July 18, 1944 2,437,378 Clark Mar. 9, 1948 FOREIGN PATENTS 407,364 Great Britain Mar. 16, 1934