US2638128A - Laminated pile wire for stationary wire wilton looms - Google Patents

Description

y 1953 R. w. PEAcdcK LAMINATED PILE WIRE FOR STATIONARY WIRE WILTON LOOMS Filed Sept. 12

Patented May 12, 1953 LAMINATED FILE WIRE FOR STATIONARY WIREVVILTON LOOMS Ralph W. Peacock, Fleming, N. Y., assignor to Nye-Wait Company, Inc., Auburn, N. Y., a corporation of New York Application September 12, 1949, Serial No. 115,241

2 Claims.

The present invention relates to pile wires for looms on which Wilton carpets, rugs and similar pile fabrics are woven.

The function of such pile wires is to form loops of the surface yarns, which loops are ultimately cut and become the pile on the surface of the fabric. The weaving of such fabrics is more particularly illustrated and described in Patent No. 2,414,064, dated January '7, 1947, from which it will beunderstood that the pile wires extend longitudinally of the loom, parallel to the warps and surface yarns, and there being one wire for every split in the reed or pitch count of the During the weaving operation, the surface yarns are intermittently looped over the pile wires by the vertical motion of the heddles and transverse motion of the comb, so that the loops are guided down a sloping guide section of each wire to a horizontal loop-height-forming section where the loops are pulled tight.

As the weaving operation continues, the loops are beat up by the reed and move forwardly to another horizontal section of the wire of somewhat less height, wherethe loop tension is released before the loops advance to a knife-holding section where the knife serves to out each loop just ahead of the forward butt end of the,

wire which is supported in a holder at the front or breast end of the loom.

Since there are many closely spaced pile wires in the loom, the wires must be thin so as to afford sufilcient space therebetween for the free passage of the warps and surface yarns between the same, and free flow of the loops forwardly on the wires. The resulting thin cross-section of the respective wires presents a diiiicult problem in mounting the knives on the knife-holding sec tion of the wires.

It has been common practice in the art to make the wires up in sections, primarily so that one section may be folded back upon itself to form a slot in which the knife can be held in the proper position. Experience has shown that this type of wire is expensive and diflicult to construct, since it requires the welding together of .three ormore individual pieces or sections endwise or lengthwise to form the composite wire, the folded section usually being butt-welded to the adjacent sections.

It is not only difficult to weld such thin sections and obtain strong, clean welds which will stand up in service, but also, the welds must be ground and polished to a uniform thickness throughout the length of th Wire, with consequent weakenbreakage than conventional wires. w

, 2 ing of the welds, so as not to interfere with the quality of the fabric being woven, and so as to prevent individual staples of fiber from catching and bunching on the rough welds where they would otherwise build up and constrictthe space between adjacent wires.

The formation of the knife slots by folding the wire section upon itself as aforementioned, also usually results in lack of uniformity in the de-- sired central position of the slots in which the knives are to be mounted.

The foregoing difiiculties are largely overcome by the improved pile wire construction of the present invention, which is characterized by employing two. duplicate laminations, each having the form of a complete pile wire in one piece, and a thin spacer segment which is disposed between the laminations at the butt and knife holding ends of the latter, these three units being spot-welded together or otherwise united, so that when completed, the wire is virtually equivalent to a one-piece construction, with far greater strength and less danger of Moreover, due to its laminated form, the knife slots will always be centrally positioned and uniform in all wires. 7

Other and further objects and advantages of the invention will be hereinafter described and the novel features thereof defined in the appended claims.

1 In the drawing: t

Figure 1 is a view in side elevation of a com-, pleted laminated pile wire, constructed in accordance with the present invention, with its side elevation of the butt and knife-holding end of thewire, with the intermediate spacer shown in broken lines; l l l Figure 4 isa fragmentary exploded view in perspective of the butt and knife-holding end of r the wire; and

taken on the line 5-5 of Figure 3.

Like reference characters designate corresponding parts in the several figures of the drawing, wherein it will be observed that the general form and outline of the pile wire of, the present Figure 5 is an enlarged verticalsectional view invention is substantially the same, as in the prior patent aforementioned, except "for the shape of the sloping section which is curved in the present illustration, instead of straight. This suitably feature, however, is not a material part of the present invention, but forms the subject of a separate application Serial No. 115,285, filed September 12, 1949, now Patent No, 2,619,990, and therefore is not claimed herein.

According to the present invention, each pile wire is composed of two duplicate laminations respectively designated I, I, and an intermediate spacer section or segment 2 which is disposed between the duplicate laminations at the butt and, knife-holding ends of the latter. These three units are united together in any suitable manner, preferably by spot-welding at intervals along the length of the wire, as generally indicated at 3.

As previously mentioned, the laminations I, i are identical with each other, and each is preferably stamped out in one piece from stainless steel or other appropriate sheet metal, each stamping including a vertical leg section 4 located at the rear of the wire, from the upper end of which extends a forwardly and downwardly sloping pile yarn guiding section 5. From the frontend of the sloping guiding section 5,. there extends a horizontal pile loop-forming and height-determining section t, which is continued at its forward end in the form of a loop tension-releasing section l of somewhat less height than the section 6. Forwardly of the tension-releasing section 1 is a knife-holding section 8 in which the knife 9 is mounted, this section 8 terminating in a butt section it at the extreme forward end of the pile wire. The butt section iii has a predetermined shape to fit in the pile wire holder at the front end of the loom, as more particularly described in the patent aforementioned.

The intermediate spacer section or segment 2' is composed of a butt section it having an outline exactly conforming to the outline of the butt sections it of the respective laminations l. Extending rearwardly from the butt section 10 of the spacer segment is an arm l I having its vertical height somewhat less than the vertical height of the tension-releasing and knife-holding sections l, 8 of the laminatiens I, l. Because of this reduced height of the arm H, a slot is formed between the l-aminations l, I when the composite wire is assembled and the laminations are spot-welded together as shown in Figure 1, the knife 9 being snugly mounted in this slot, and preferably removably held therein by frictional engagem nt with the opposite sides of the slot, with its upper sharpened edge extending longitudinally and centrally of the pile wire on an upward and forward inclination, while the lower edge of the knife rests upon the upper edge of the arm I! at the base of the slot between the laminations l, i.

The arm ll of the spacer segment 2 preferably extends rearwardly of the pile wire for a distance somewhat beyond the knife-holding section 8 of the wire, and if desired, it may be extended even further and substantially to the forward end of the sloping yarn guiding section 5, although this is not absolutely essential, so long as the arm H is of sufficient length to substantially stiffen and reinforce the portions of the wire which have the lowest vertical height, and which otherwise would be the weakest part of the wire.

It will be understood from the foregoing that my improved pile wire construction is relatively simple and inexpensive, and may be quickly assembled by means of spot-welding to attain a thin, flexible, yet strong wire which is virtually equivalent to a one-piece construction. Moreover, imiformity of shape andthickness of the wires is assured, together with uniformity of centralization of the knives in all wires.

While the specific details have been herein shown and described, the invention is not confined thereto as changes and alterations may be made without departing from the spirit thereof as defined in the appended claims.

Iclaim:

1. A pile Wire of the class described, comprising two identical laminations, each including integral butt, knife-holding, loop-tension-releasing, loop-forming, and loop-guiding sections successively from front to rear of the wire, an intermediate spacer lamination disposed. between the firstmentioned laminations at the buttends of the latter and also extending between the knife. holding sections thereof, said intermediate spacer lamination conforming atone end to the. shape of the butt sections of the first-mentioned lamina tions u vin that portion thereof between the knife-holding sections of said first-mentioned laminations of less height than the height of the latter, thereby forming a centrally positioned knife mounting. slot between the outermost lami nations, the upper edge of said extended portion of the intermediate spacer and the contiguous edge of the butt portion thereof forming an acute angle for preventing upward displacement of a knife when mounted in thoslot aforesaid, and said laminations all being united, together by spot weld as an integral unit.

2, A'pile wire of the class described, comprising two identical laminations, each having the form of a conventional pile wire, including integral butt, knife-holding, loop-tension-releasing, loop-forming, and loop guiding sections successively from front to rear of the wire, anintea mediate spacer lamination disposed between the first-mentioned laminations at the butt ends of the latter and extending along the knifeeholding sections thereof, said intermediate spacer lami nation forming a centrally positioned knife mounting slot between the outermost laminations, and said laminations all being united together by spot welds as an integral unit, the butt end of the spacer lamination conforming to the shape of the butt ends of the other laminations, but being of less vertical height than the other laminations. at the knife-holding. sections of the latter.

RALPH vWM. PEACOCK.

References Cited in the file of this patent UNITED STATES PATENTS

Images