US2609839A - Method of weaving pile fabrics - Google Patents

Description

Sept. 9, 1952 p, GROAT 2,609,839

METHOD OF WEAVING FILE FABRICS Original Filed April 12, 1948 gmmm 'Franqzls f, Grad Patented Sept. 9, 1952 METHOD OFWEAVING PILE memos I Francis P. Great, Bloomsburg, Pa., assigncr to 7 he Magee Carpet Company, Bloomsburg, Pa;

a corporation ofPennsylvania 7 Original application April 12, 1948, SeriaLNo'.

' This invention relates to a method of weaving pile fabrics and is a division of my'prior application, filed April 12,. 1948, Serial Number 20,547,

now Patent Number 2,546,261, issued March 27, "1951. p

' In my prior application a pile wire of special .shape is disclosed for use in a wire loom to proof pilewarp to provide a fabric having a background of-low loops varying in-height in each weftwise rowand a raised design of high cut loops for tufts.

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

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

Fig. 1 is an exploded side elevational view of a fabric woven in accordance with my invention, and, v

Fig.2 is an exploded perspective view of the fabric in the process of weaving.

,Referring to the drawing, the backing of the fabric may be of any suitable construction but in the form illustrated includes the usual stufler warps 9 and two series of weft threads and H lying, respectively, above and below the stutter warps and bound in place by crossed binding warps I2 and I3. The pile forming warps I4 extend along the fabric in the body thereof between the stufier warps and the upper series of weft threads Ill. When weaving the fabric the pile warps [4 are raised and a loop forming pile wire is inserted in the shed formed by the raised warps. After insertion of the pile wire the warps are lowered forming loops over the wires and pass under the next upper weft thread thus forming a weftwise row of loops 15.

In my improved method a special shaped pile wire 5 is employed in combination with a conventional cutting wire 22. The loop forming edge of the special wire is of undulating shape throughout its length to provide high and low portions 6 and 1 with inclined connecting portions 8 between the high and low portions. The wires 5 are constructed so that when a series are Divided and this application 17, 1949, Serial No. 110,787

4 Claims. (01. 139-39) I I inserted in the fabric have its high and low portions inwarpwise alineceding wire.

each succeeding wire will ment with the-1ow and high portions of the pre The loop forming edge of the cutting wire 22 is straight and is higher than the high portions of the wires 5 with a raised knife edge 2| at its end for severing the loops when the wire 22 is withdrawn.

In wirelooms' it iscustomary to insert a series of pile wires in the fabric as it is being woven for a distance of about three inches from the fell or opening of the shed. In carrying out my method the special wires '5 and cutting wires 22 are inserted in the fab'ric inalternation, with a cutting wire intermediate the special wires .and with the high and low portions of each special wire being in-warpwise alinement with the low and high portions, respectively, of thepreceding special wire. When a special wire 5 is withdrawn the loops formed on the low portions l are raised to a height correspondingto that of the loops formed on the high portions 6 so, that all the loops 23 in a row are the same, height. 1 As, the

next succeedingv special wire is withdrawn the low loops formed thereon willbev raised and if formed from the same warps raised-inv the preceding'row,

thoseloopsin the preceding row will-be lowered, thus forming a weftwise rowofhigh and low loops with the loopsin between the low and high loops being of graduated height. When the cutting wires 22 are withdrawn the loops formed thereonwill be severed by the knife; edge 2| forming weftwise rows of tufts 25. If awarp that has been raised over a special wire 5 is also raised over the next succeeding cutting wire 22, the cutting of the loop by withdrawal of the cutting wire will have no effect on the height of the loop in the preceding row. Also if a warp that has been raised over a cutting wire is raised over a high portion of a special wire the withdrawal of the special wire will have no effect on the tuft formed by withdrawal of the cutting wire, but if the warp is raised over a low portion of the special wire then the withdrawal of the special wire will slightly lower one leg of the tuft.

The pile warps are selectively raised to form the shed for insertion of the pile wires by a Jacquard mechanism operated in accordance with a pattern card of the desired design. By using the special wire in combination with a conventional cutting wire, the ground pile area of the fabric is formed of loops irregular in height and the design area formed of tufts which are higher than any of the loops. With the new method only one frame of pile warps is necessary to prointermediate low loop-forming portions with oppositely inclined loop-forming portions between the high and low portions, Weaving pile warps over said high, low and inclined portions to form a weftwise row of high and low pile loops with intervening loops of graduated height between the high and low loops, injsje'rtinginto a subsequent shed a knife wire having a loop-forming edge of uniform height, selectively weaving the 4 row to form a row of loops of uniform height cutting the loops in intermediate rows to form rows of tufts, successively raising the low loops and loops of graduated height in alternate rows to the height of the highloops whereby the height of the loops in'e ach preceding alternate row of loops of those pile warps not raisedin intermediate rows are reduced in height.

pile warps over said knife wire, inserting into a I subsequentshed a second non-cutting wire having high andlow loop-forming; portions withinter'v'ening inclined loop-forming portions, s e1ectively weaving the pile'warps over said high, low

and inclined' pcrtions of1said'second non-cutting wire to form 'a'succeeding weftwise row of high and. low pile chops with; intervening loops oi graduated height between. the high and low loops, withdrawing said first-mentioned non-cutting wire to form a row of high loops; withdrawing said knife wirerto form a row'of tufts and then withdrawing "said; second-mentioned non cuttinjg wire whereby theloops in said first row in pile warps not raised'o'ver the intermediate knifewire but Woven over thg'lowrand inclined portions of said second non cutting'wire' will 'be reducedin height forming a row of'liigh andlowdoopswith loops ofgraduated heightibetween eachseries of :high and'lovv loops. v

2. A method as'described. in claim lwherein the low portionsof one :no'nr-cutting wire are in warpwise alignment with thethigh 'portionsof the other non-cutting wire; l i

3. A method of weaving a pile fabric having a backing and 'a' plurality of 'p'ile'warps which comprises forming the backing with the pile warps held ther-ein by elements of the backing, selectively raising the pile warps from thebacking to form transverse rows of loops'with the loops-in alternate rows raised to provide high loops" and intermediate low loops withloops of) graduated height between the low and high loops, theilo'ops in'intermediaterows beingraisedtfrom those pile warps of the highloops-of a subsequent alternate utt ireqw gr bri- 4. The method of weaving on a Wire loom a pile fabric having a warp pile face including rows of tufts and rowsof loops of graduated height which comprises inser inginto the shed a non-cutting pilewire having, high loop-forming portions and intermediate low loop-forming portions with oppositely inclined loop-forming portions between the high and low portions, weaving pile warps over saidhigh, low and inclined portions to form aweftw-ise row of high and low pile loops with intervening loops of graduated height between the high and low loops, inserting, into a subsequent shed a knife wire havinga l'oop-foriningedge-of uniform height, 1eotifvely weavingft e "pile warps over said wire,1inserting into a sub.- sequent shed a second non-cutting wire having high and low loop-forming. portionswith intervening inclined; l qn forming b i l 1%- tively weavingqthe .pile warpsfoverjsaidsecond mwt ins wire-i Wo e er id. Wi e r i i v n Lr he h h cortice 'enii e ile wa n s m qr woven over'said kpife hoverjthe low and incline lthdrawing 's'aidjfirst mentionednqn w re toform-a'row lof'high loops, w hd aw ng h d ik ii 5wi l 9 oi la O ts nswe withd w ng, i r e d lqops inlsaid flrstgrow in pile warps woven over-t e; vlow;and inclined or.- tions of said second non-cutting wire willberle duced n ei h 9 ?mm f ow. ot er nq loops with -loops o f graduated height ,lietween each series of high and low loops.'

- v FRANCIS B. GROAI The following references areof recordinthe Number Name Date 2,516,465 Jacksofi" u Jul 25,1950 2,575,029;

'th the pile I warps; thatgare

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