US2076785A - Double tuft pile fabric loom - Google Patents

Description

Apfil'13, 1937- R. G. KNOWLAND 2,076,785

V DOUBLE TUFT FILE FABRIC LOOM Filed April 25, 1952 4 Sheets-Sheet 1 er 'W ATTORNEY April 13,- 1937.

R. G. KNOWLAND 7 2,076,785-

DOUBLE TUFT FILE FABRIC LOOM Filed April 25, 1932 4 Sheets-Sheet 2 A ORNEY A ril 13, 1937. R'.'G. KNOWLAND I DOUBLE TUFT PIL April 1937- I R. cs. KNOWLAND 2,076,785-

DOUBLE TUFT FILE FABRIC LQOM Filed April 25, 1952 4 Sheets-Sheet 4 l l I ATTORNEY MMW' Patented Apr. 13, 1937 PATENT OFFICE 2,076,785 DOUBLE TUFT mu: FABRIC LOOM Richard G. Knowland, Longmeadow, Mass., as signor to Bigelow-Sanford Carpet 00., Inc., Thompsonville, Conn., a corporation of Massachusetts Application April 25, 1932, Serial No. 607,285

Claims.

Woven pile fabrics may be divided into two.

general classes; first, those in which the pile 5 surface is formed by looping some of the weaving threads over pile wires during the weaving operation and withdrawing the pile wires to leave a cut or uncut pile surface; and second, those in which the pile surface is produced by pile forming yarns introduced as tufts into the fabric near the weaving point from an extraneo'us yarn supply.

Pile fabrics of the second class are generally known as tuft pile. fabrics, and may be typified in Axminster carpets or rugs, and the present invention relates to a loom construction for weaving two pile fabrics of this second general class face to face.

In weaving pile fabrics of the first class wherein the pile surface is produced by pile forming warp threads looped about pile wires, it has been a well known practice to produce such fabrics either singly or double, but in weaving tuft pile fabrics the problem of weaving a double fabric in a. single operation presents difficulties due to the fact that the pile forming yarn is taken from an extraneous supply and transferred to the weaving point where it must be presented to both webs being woven.

The present invention relates to a novel loom construction for introducing the pile forming tuft yarns in both sheds of the double fabric and for the inserted pile yarns to loop these ends about the holding wefts.

A more specific feature of the invention -resides in yarn engaging nippers supported for swinging and dipping movement relative to the sheds, and in means for actuating the nippers to clear the adjustable pile bar as the nippers v are swung towards the weaving point and for inserting the nippers through both sheds and then withdrawing them to lay the yarns across the sheds;-and a further feature resides in means for manipulating the nippers to fold the pile yarns about a holding shot into position to be bound in by the next-weft shot.

Other features of the invention and'novel combination of parts in addition to the above will be hereinafter described in connection with the accompanying drawings which illustrate one good practical form thereof.

In the drawings:--

Fig. 1 is a vertical sectional view through a loom embodying the features of the present invention;

Fig. 2 is a side elevation of parts of the loom of Fi 1;

Fig. 3 is a front view of the yarn nippers and cooperating parts;

opening and closing the nippers;

Fig. 5 on a larger scale is a sectional view taken on the line 5.5 of Fig. 3; p g Fig. 6 is a transverse sectional view through the nippers of Fig. 3; I

Fig. 7 is a vertical longitudinal sectional'view through parts of the loom adjacent the weaving point and shows a tuft pile'yarn being advanced by thenippers toward the yarn inserting position; p

Fig. 8 is a similar view showing the yarn carried downwardly through the sheds by the nippers: l a

Fig. 9 is a similar .view showing the nippers elevated to lay the yarn across the sheds;

Fig. 10 is a similar :view showing the means for looping the ends of the yarns around the holding shots; I v

Fig. ll is a similar view showing the tuft forming yarn secured in place by binding shots; and

Fig. 12 is an enlarged side sectional elevation showing the warp beams and lead of the warp threads. 7

' The loom shown in the drawings is of the general Axminster type except as modified in accordance with the present invention to weave a double tuft pile fabric, and only so much of the loom is shown as is required for a complete disclosure of the invention to one experienced in the art of Axminster weaving.

The loom frame I may be given any appropriate construction for the support of the operating parts, and extending upwardly therefrom are the standards 2 which support appropriate brackets 3 for the usual carrier chains 4 and their operating mechanism. The chains 4 carry the tube frames 5 and are advanced step by step as is usual in Axminster looms to advance the tube frames in the desired order to the yarn,

- Fig. 4 is an elevation view of mechanism for transfer point. The yarns, may'be transferred from this point by employing nippers to carry loom'by' making comparatively few changes in this type of loom, as will be apparent from the foregoing.

It has been customary heretofore to provide the nipper type Axminster loom with a fabric rest plate 8 for use when the pile fabric is woven faceup, and these looms have in some cases also been provided with a plate or pile bar I for use when the fabric is woven face down, it being intended, in such prior constructions, that one or the other of these plates be used upon the loom but not both at the same time.

This prior loom construction, however, is well adapted for use in carrying put the present invention, for byemploying both plates 6 and I atthe same time and mounting them upon the loom frame the proper distance apart. double tuft pile fabrics of the desired thickness may be woven. The plates 6 and I are preferably provided with the blades 8 and! adapted to support I The double fabric as woven is drawn forward over the breast beam II by thespike or take-up rolls II and I2, one of which engages the lower fabric F and the other the upper fabric F. The double fabric is split to form the two pile fabrics F, F by the knife ll which is moved back and forth across the loom in a well known manner.

The various warp yarns provided to form the ground fabric of the upper and lower webs may constitute an upper set of warps l4 and a lower set ll adapted to be shiftedby the harnesses it which may be actuated by the usual harness operating mechanism. The warp threads for one of the two webs are supplied from the two warp.

' shots I! in the upper web and the other fusintroducing weft shots 2! in the lower web, and the weft shots may be beaten up by a reed 2| as usual.

except that the dents of the reed should be long enough to reach across both sheds, as shown..

The reed 2| is clamped tothe reed holder 22 supported 'for rocking movement in a general horizontal direction by the arms or lay 23 secured to the rock shaft 24. Docking movement is imparted to this shaft and the lay by the actuating arm 25 and link 20.

The tuft forming yarns o in the construction shown, are transferred from the lowermost tube frame 5 by nippers which for the most part may be constructed in a well known manner. The nippers are formedof a front nipper blade 21 and a rear nipper blade 2. secured to the nipper jaws 29 pivoted upon the nipper Jaw shaft 30, and the blades are continuously urged toward each other by the springs ii. The plates are moved apart to admit the set of yarns presented by the tube frame by shifting the nipper closing shaft 32 in the direction of its length to force the cones 33 between the outer ends of the laws 28. The

to the upper ends of the rocking arms 52.

arms 52 are secured to the shaft 52 having e'xnippers are closrd by springs-2i upon movement of shaft 32 to withdraw the cones 83 from the outer ends of the laws 29-.

' The nippers are rotatably supported by the rocking arms 34 rigidly secured to the rock shaft 2| iournaled upon the standards 2. The arringement is such that the nippers are provided with the supporting bearings journaled in the arms 34 for rotation of the nippers about the axis of the shaft 32. Rotative movement is imparted to the nippers by rigidly securing to one end of shaft 32 the pinion 31 which is engaged by the rack 20. This rack is shifted in the direction of its length by the lever 39 pivoted at 40 and having its upper end pivotall connected to the rack at 4|.

Rocking movement is imparted to the lever 39 by cam means, not shown, associated with its lower end. The desired raising and lowering of the arms 34 and nippers is controlled by the connecting rod 42 extending downwardly to cam controlled means. not shown.

Each time a row of tufts is to be presented to the weaving point the nippers are swung about the shaft 32 to their upper position and the arms 34 are raised to position the open laws of the nippers to engage the yarns a presented by a tube frame 5. The nipper jaws are then closed to grip the yarns and the arms 34 are lowered to pull from. the spool of the tube frame a set of yarns of sumcient length. to provide for two complete tufts. The cooperating knives 43, 44 supported by the brackets 45 are then operated in a well known manner to sever the yarns between the tube frame and nippers.

' The nippers are then swung downwardly. as indicated by the arrows in Fig. l, and during this rotation he arm 34 may be raised sufliciently to cause the outer ends of the nipper fingers to clear the adjustable pile bar I.

The fingers of the nipper blades 21, 28 are made long enough to extend downwardly through both sheds, as shown in Fig. 8, and while thereed 2! is back the nippers are advanced from the position of Fig. 7 downwardly through the shed to carry the yarns a through both sheds, as shown in. Fig. 8. The nippers are then raised and moved frontwardly to lay the yarns aacross or folded around these respective wefts. Dif-- ferent constructions may be employed to this end and in the constructiorlshown the upper ends of the yarns a are folded about the holding shot It by the nippers by moving these nippers downwardly in the upper sheds, and then opening the nippers to release the yarns as'will be apparent from Fig. 10. A heel 48 upon each finger of the front nipper blader serves to tuck the folded yarn a inwardly, as shown in Fig. 10.

' A comb 41 and comb plate 4' are employed in the construction shown to'fold the lower ends of the yarns upwardly around the lower holding shot 20. The comb 41 is secured to a bar 49 and is operated with a'put-out and put-up moveinent by the comb bar arms 50 pivoted at ii The tending downwardly therefrom the lever 54 which is rocked by the cam operated link 55 to move the comb 4'! rearwardly. The comb bar lifting rod 56 serves to move the comb upwardly through the lower warps, as shown in Fig. 10.

The comb plate 48 is secured to the arms 51, the forward ends of which are pivotally connected to the links 58 pivoted at 5|. The arrangement is such that the comb and comb plate may move together or separately and the latter may be yieldingly supported by the former. The comb plate 48 serves to fold the downwardly extending yarn ends rearwardly about the holding shot to a. horizontal position and the comb 4! forces the ends upwardly between the warps about the holding shot, as shown in Fig. 10, whereupon the next inserted shots are beaten up as the nippers and comb are withdrawn, as

willbe apparent from Fig. 11.

It is desirable to provide means to port and guide the nippers adjacent the weaving point, and this may be accomplished by providing the fork 59 (Fig. 2) formed at the upper end of the yieldingly supported lever 60 pivoted at 6| to the rocking lever 52 which is pivoted to the machine frame 'at 63. The lower end of the fork lever 60 is guided by the fork cam rod 64 and the lever 60 is normally held in the raised position in which it is shown in full lines in Fig.

2 by the spring 65 connected to the lower end of this lever and having its upper end anchored at 66. The notched portion of the fork 59'is adapted to receive a stud 61 upon the nippers and as the nippers are lowered into the shed the fork lever moves downwardly to the dotted line position of Fig. 2.

The nipper jaws are normally held closed by the springs 3| but are forced open to release thev yarns by the power actuated link 68 (Fig. 4) connected to one end of the bell crank lever 69 pivoted at 10 to thearm 34. The other end of the lever 69 is connected to the cone rod 32 to shift the same in the direction of its length, as will be apparent from Fig. 4.

The various parts of the loom are operated in timed relation, largely by the proper timing of the operating cams to weave the double tuft pile fabric having any desired pattern.

It will be apparent from the foregoing that the nippers 21, 28 operate to lay a double length of tuft forming yarns across the sheds so that when the ends of the set of yarns a are looped about the upper and lowr'holding shots and folded inwardly by the action of the nippers and comb, these ends will lie adjacent each other at the central plane of the double fabric where the pile is to be severed by the knife I3 to produce the separate pile fabrics F, F.

What is claimed is:--

1. In a loom for weaving a double tuft pile fabric, the combination of shedding mechanism for forming an upper and a lower shed, tuft yarn presenters mounted for movement towards and from the weaving point, a rocking arm by which the tuft yarn presenters are supported, and a link connected to the rocking arm and actuated by a going part of the loom to impart to the arm and presenters an amplitude of movement sufficient to carry the tuft yarns bodily through and beyond both sheds, then lift the presenters to lay the tuft yarns across both sheds, and then turn one.

end about a holding weft shot; and comb mechanism and actuating means therefor for turning help supthe other end of the tuft yarns about a holdin 'frame above the warp, tuft yarn presenters mounted on said member, a tuft yarn presenter opener shaft mounted on said member, means for moving said shaft longitudinally to open the presenters to engage tuft yarns, a rod actuated from a going part of the loom and connected to said rocking member to cause the presenters to carry-tuft yarns through and beyond both sheds, then rise through both sheds, and then turn the held end of the tuft yarns about a holding weft shot in one shed, and comb mechanism for turning the other end of the tuft yarns about a weft shot in the other shed.

3. In a loom for weaving a double'tuft pile fabric, the combination of shedding mechanism for forming an upper and a lower shed; tuft yarn presenters mounted for movement towards and from the weaving point, a rocking arm by which the tuft yarn presenters are supported, an auxiliary and yielding support engaged by the tuft y'arn presenters as they move towards the weaving point, a link connected to the rocking arm and actuated by a going partof the loom to impart to the arm and presenters an amplitude of movement sufficient to carry the tuft yarns bodily through and beyond both sheds, then lift the presenters to lay the tuft yarns across both sheds, and then turn one end about a holding weft shot, and comb mechanism and actuating means therefor for turning the other end of the tuft yarns about a holding weft shot in the other shed.

4. In a loom for weaving double tuft pile fabrics, the combination of shedding mechanism lower shed, a rocking member mounted on the loom frame'above the warp, tuft yarn presenters mounted on said membenrack and pinion mechanism for turning thetuftyarn presenters about their mounting on said member, a tuft yarn presenter opener shaft mounted on said member, means for moving said shaft longitudinally to open the presenters to engage tuft yarns, a rod actuated from a going part of the loom and connected to said rocking member to cause the presenters to carry tuft yarns through and beyond both sheds, then rise through both sheds, then turn the held end of the tuft yarns about a holding weft shot in one shed, and comb mechanism for turning the other end of the tuft yarns about a weft shot in the other shed.

5. In a loom for weaving double pile fabrics, the combination of warp beams, a plurality of heddles movable for manipulating warps from said beams to form sheds in different planes, needles for inserting weft simultaneously in said sheds, supplies of tuft yarns, grippers for drawing said tuft yarns from said supplies, means for severing saidgtuft yarns from said supplies, means for actuatingsaid grippers to insert the severed lengths of yarn through said warps and turn the previously gripped ends of said yarns around one around another of said weft shots, and means for actuating said comb.

RICHARD G.

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