US2246217A - Knot tying - Google Patents

Description

ATTORNEYS INVENTOR Marti/7 N. Noll/1 I B flfl v M. N. NOLING KNOT TYING Jum 17, 194-1.,

Filed Dec. 17, 1938 Patented June 17, 1941 KNo'r TYING Martin N. Noling, Rockford, 11 1., assignor to Barber-Colman Company, Rockford, ,1ll., a. cor- Duration ofIIllin'ois Application December 17, 1938', Serial No. 246,337 GCIaiins. (erase-1) The invention pertains to knot tying and has particular reference to an improved method of tying knots as well as to an apparatus for carrying out such method.

The present invention finds particular utility as applied to the knotting of threads or yarns made of silk, rayon, celanese or other regenerated cellulose derivatives. Such threads or yarns are hard and unyielding as compared, for example, to cotton, and as a consequence it'is difiicult to tie knots in them in tyingin anew warp, for instance, which will not beshaken loose as the threads are pulled and jerked in subsequent movements through the reeds and harness of a loom. The general aim of the present invention is to overcome this difiicultyby providing an improved method, as well as an ap-'- paratusfor carrying out thesame, for knotting threads or yarns which is capable of forming a firm hard knot in threads or yarns made 'of even such materials as silk, celane'se; rayon or other regenerated cellulose derivatives-.- This object is, in general, accomplished by moistening the portions of thread which are included in the knot, preferably during the completion of the knot, so that when the knot dries the threads take on a permanent hard set in: their-- knotted form.v g

A.more specific object of the invention is to provide a knotter in which theknotted ends of the thread or yarn are moistened as an incident to their movement in the knot tying operation so that a firm hard. knot results which will readily withstand jerking and pulling such, for examplaas thatwhichis encountered in a weaving operation.

Further objects and advantages of the invention will become apparent as the following description proceeds, taken in connection with the accompanying drawing in which:

Figure 1 is a general perspective view of a warp tying machine, including a knotter embodying the present invention and adapted to carry out the improved method herein disclosed.

Fig. 2 is an enlarged detail front elevation of the knotter included in the apparatus of Fig. 1 showing in particular the movement of the knotted thread ends across a moistening wick cable to the tying of other types of knots such, for example, as a weavers knot. Also, the invention has been shown and described herein as embodied in a knotter of a warp uniting machine of the general type shown in Peterson Patent 'No. 2,011,115, but it is also applicable to hand knotters or knot tying devices included in other types of warp-uniting machines.

Inorder to make :clear the practice of the invention a particular application and embodiment thereof have been shown and described herein in some' detail but there is no intention to thereby limit the invention tosuch application and embodiment, but, on the other hand, the appended claimsare intended to cover all modifications and alternative constructions falling within the spiritand scope of the invention.

As was noted above the invention" has been sho'wnherein (-Fig. 1) as embodied in a knotter for a warp tying machine of the type disclosed in said Peterson Patent No. 2,011,115. machine is designed in general to select successive pairs of threads from an old warp A and a new warp B, to segregate the threads-from the respective warps to make up successive pairs, tie the successive pairs of threads together, and cut off and dispose of the waste end portions. For this purpose the machine is provided with a selector mechanism (not shown) for segregating successive threads a and b from the respective warps A andB after which a mechanism including a 'reciprocable slide l0 serVesto advance the segregated threads to a" knotter, shown as including a rotating tying bill II. The. successive selected. pairs of" threads are pushed together for tying and positioned in operative relation with the tying bill II by means including a pair of guides designated generally by the numerals l2 and I3, which are located on opposite sides of the bill. The guide I2 is of fork shape and the threads a -b are pushed into its narrowest throat portion to locate the same for tying by the bill H. The guide I3 is also of a generally forkshape but is provided with barbs I3 thereon which prevent the threads from springing back out of the fork.

The particular form of knot tying mechanism shown herein is similar to the one fully disclosed in Colman Patent No; 1,082,474 issued December 23, 1913. In general, it includes a rotatable tying bill ll, rotated by means of a spiral gear l4 meshing with gear I5. This gear I5 is driven,

through suitable intermediate gearing, by a main drive gear I6 which also serves to reciprocate not only the slide I but also the stripper and waste end disposal mechanism.

Rotation of the tying bill I l causes it to engage the threads 11 and b and entwine them into the form of a loose round knot. The knot, which is loosely formed by the tying bill I I, is pulled tight and stripped from the bill by a notched rotating stripper disk 11. The threads a --b are ledged within a notch H in the stripper and it is retated in timed relation with the movement of the tying bill II so that the threads are pulled down by the stripper between a pair of plates l8l8 (Fig, 2) to strip them from the tying bill.

The warp threads are supported in the machine by suitable clamps l9-20 on opposite sides of the knotter, only the clamps at the right hand side being herein shown. At the completion of the tying operation the threads are sheared at the tying bill and at a point adjacent the selector mechanism by a shear means (not shown) leaving waste ends for removal by means designated generally by the numeral 2|.

In accordance with the present invention the knotted ends of the threads a b' are moistened and this moistening operation is preferably carried out by moving them across a source of moisture as an incident to the stripping of the knot from the tying bill H. For this purpose a sheet metal cup 22 (Fig. 2) is fixed to the upper side portion of the plate l8 so that one end of a wick 23 disposed within the cup lies flush with the top of the plate. The outer side wall of the cup is located below the upper edge of the plate l8. Consequently, when the stripper l'l pulls the knotted threads over the edge of the plate 18 it also pulls them across the exposed top of the wick 23 so that they are saturated with moisture from the wick. The wick 23 itself is kept moist by immersing one end thereof in a reservoir 24 filled with water (Fig.3). After the threads leave the knotter they become dry in a short time by their exposure to air and the previously wetted knot takes on a hard permanent set. Consequently, the ends of the threads will not be pulled apart by the jerking and pulling of the reeds and harness in the loom during subsequent weaving operations even though the threads be made of such hard unyielding materials as silk,

jacent said tying bill, a stripper movable along the face of said plate opposite said tying bill past said edge thereof and engageable with the threads to pull the same from said tying bill and across said plate edge, means including a wick located adjacent said plate edge for wetting the knotted portion of the threads as it is pulled acrossthe same by said stripper, and means for supplying liquid to said wick.

2. In a knot-tying mechanism, the combination of, means including a rotatable tying bill for celanese, rayon or other regenerated cellulose knotting the ends of a pair of threads, a stripper for pulling the knotted threads from said tyin bill, and means for moistening the knotted portion of the threads during their movement by said stripper.

3. A knotter of the type embodying a rotating tying bill for knotting two portions of thread or the like, characterized by the provision of means for moistening such'portions of thread as an incident to their movement during the knot tying operation. I I

I 4. In a knot-tying mechanism the combination of means including a rotatable tying bill for knotting the ends of a pair of threads, a pair of spaced plates presentingedge portions thereof to the threads adjacent said tying bill, a stripper movable between said plates past the edge portions thereof and engageable with thethreads to pull the same from said tying bill and into the space between said plates across said edges-thereof, a liquid reservoir, a wick projecting from said reservoir, and means including a cup located adjacent one of said plate edges for supporting a portion of said wick to wet the knotted portion of the threads as it is pulled across the same by said stripper. V

5. The method of knotting threads prior to their utilization in a textile weaving operation or thealike, which comprises, intertwining in the form of a loose knotportions of a pair of threads to be united, exerting a pulling force on the threads-to draw the knot tight; and, as an incident to the movement resulting from such pulling, moving the threads across a source of moisture to wetthe same.

,6. The method of uniting the ends of a pair of threads securely together so as to prevent their disjoinder due' to subsequent pulling or jerking, which comprises, the knotting of a pair of threads and moistening of the portions of the threads which make up the knot, and then permitting the same to dry after the knot has been pulled hard and tight.

. g MARTIN N. NOLING.

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