US 3336063 A
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1967 J- H. REMMERS 3,336,063
A KNOT TYING DEVICE Filed Sept. 20, 1965 INVENTOR. JOHANNES H. REMMERS ATTORNEY United States Patent 3,336,063 KNOT TYING DEVICE Johannes H. Remmers, Velp, Gelderland, Netherlands,
assignor to American Enka Corporation, Enka, N.C.,
a corporation of Delaware Filed Sept. 20, 1965, Ser. No. 488,614 Claims priority, application Netherlands, Oct. 7, 1964, 6411,624 Claims. (Cl. 289-2) ABSTRACT or THE DISCLOSURE Knot tying apparatus comprising a sectional blockshaped body through which one or more separate channels run along paths corresponding to the separate paths of the yarn ends within the knot to be formed, said body formed by a plurality of sections having mutually abutting surfaces, with each abutting surface having at least a single groove therein being directly opposite to a groove in another of said abutting surface whereby all directly opposed grooves form a channel through which passes the yarn ends to be tied. Means are also provided for separating the various opposing grooves and for automatically pulling thread ends through channels formed by the grooves.
The present invention relates generally to a device for tying yarn ends together. More particularly the invention embodies a simple knot tying device having a minimum of uniquely joined and easily disengagable movable parts and into which yarn ends may be automatically inserted.
The need for a device of the type to be described is particularly great in conjunction with apparatuses used for automatically measuring various properties of large numbers of yarn samples. In order that the quality of threads and yarns manufactured on an industrial scale may be monitored, it has been found necessary to subject these samples to a great many tests for determining the strength, elongation, etc., of the samples. When thread samples are selected individually from a large quantity of unconnected samples and mounted separately in various testing devices, the testing process becomes very time consuming.
p A considerable reduction in the cost of testing the quality of threads and yarns can be obtained by joining the ends of all the thread samples so that an endless thread is formed which may be subjected to continuous measurements. In this manner the operator of a testing device is not required to make a selection from said quantity of samples for each test operation.
' In the past it has been extremely difiicult to join thread ends together automatically and in a simple manner. Various types of yarn tying devices requiring hand threading of the yarn samples to be tied are well known. However, hand threading is a time consuming operation, especially where large numbers of yarn samples are to be tied together. Other prior art knot tying mechanisms which do not require hand threading of the samples have been constructed using adjoining sections which do not easily lend themselves to disassembly once a knot is formed.
The present invention has been designed to overcome these and other disadvantages of prior art knot tying mechanisms and comprises a block shaped body through which one or more separate channels run along paths corresponding to the separate paths of the yarn ends within the knot to be formed. Said block shaped body is formed by a plurality of sections having mutually abutting surfaces, with each abutting surface having at least a single groove therein being directly opposite to a groove in another of said abutting surfaces whereby the totality of the directly opposed grooves forms a channel through which passes the yarn ends to be tied. Means are provided for easily separating the various opposing grooves forming the channel running through the block shaped body and further means are provided for automatically pulling the thread ends through the channel or channels.
It is an object of the invention to provide a new and improved device for tying yarn ends together.
It is another object of the invention to provide a device of the type described having a minimum of easily separable moving parts and operable to quickly and simply tie ends of yarn together.
These and other objects of the invention will become more fully apparent in the following detailed description of the accompanying drawings wherein:
FIGURE 1 is a perspective view of the configuration of a single overhand knot which may be tied using the device of the present invention;
FIGURE 2 shows the device of the present invention in a closed position;
FIGURE 3 shows the same device in an open position; and
FIGURE 4 illustrates the yarn paths of the device shown in FIGURES 2 and 3.
Referring now to FIGURE 1, there is shown a single overhand knot in a strand of yarn 1 having points of deflection A, B, C and D thereon lying on a straight line. This line is the line of intersection of two planes, one of which is defined by the loop B, D, A and the other of which is defined by the loop A, C and intersects the B-D-A plane at an angle of about 60. The in-going yarn end is substantially perpendicular to the B-D-A plane whereas the outgoing yarn end makes an angle'of about 60 with both planes at point B on the line of intersection of said planes.
For purposes of illustration only, a single strand of yarn 1 is shown in FIGURE 1. When two strands are to be tied together, they are positioned side by side and follow the ABCD path in FIGURE 1 during the knot tying operation.
In FIGURE 2 there is illustrated the block shaped body with hinged sections 2, 3 and 4 in their closed positions. Sections 2, 3, and 4 are swingably interconnected as shown in FIGURE 3 by means of the hinges 5 and 6.
Section 2 of the block shaped body has a funnel shaped channel 7 which narrows toward the boundary surface 17 as shown in FIGURE 3 and opens into the continuous channel formed by the grooves within the various sec tions 2, 3 and 4 at point C in FIGURE 1. Next to the exit of channel 7 and also on the line of intersection of the two planes A-C and A-D-B, there is positioned the entrance of an outlet channel 10. The outlet channel 10 runs straight through section 4 and connects with an outlet conduit 8. Transverse to the outlet conduit 8 there is connected a compressed air line 9 for creating a vacuum in the outlet channel 10 necessary to pull the yarn from the entrance channel 7, through the overhand knot channel contour within the block shaped body, and out of the conduit 8.
Facing the exit of the inlet channel 7 are the upper ends of grooves 13 and 14 in sections 3 and 4, respectively, shown in FIGURE 3. These grooves directly oppose each other when the block shaped body is in a closed position to form the initial portion of the channel in plane A-C. The path of the yarn travel from A to D begins at the continuation of groove 14 cut out of surface 18 of section 4 and this continuation of the groove 14 meets fiush with and directly opposes the lefthand semicircular section of the groove 11 in surface 17 of block 2 when the body is in a closed position.
The remainder of the curving path of the yarn travel from D to B is defined by the right hand smaller semicircular groove 11 in surface 17 of block 2 and the groove 12 on the surface 16 of section 3. These two grooves are positioned flush with and directly opposite each other when the body is in a closed position. The innermost limit of groove 11 as viewed in FIGURE 3 is positioned flush with and directly opposite to the entrance of exit channel when the body is in a closed position, said entrance being represented by point B in FIGURE 1.
FIGURE 4 schematically shows the path of the thread travel from the opening of the entrance channel 7 through the exit channel 10.
When two yarn samples are to be tied together, their ends are positioned side by side and held in front of the entrance of the channel 7. When compressed air is admitted through line 9 the two adjacent yarn ends will be sucked into the mouth of the channel 7 and transported via grooves 11 through 14 to the exit channel 10 and on to the outlet conduit 8. By pulling in opposite directions on the ends of yarn extending from without the entrance channel 7 and exit conduit 8, the knot in said ends can be tightened, and the friction between the yarn and the sections 2, 3, and 4 will cause the sections 2, 3 and 4 to move apart. This movement is caused by the yarn enterin-g between the surfaces of sections 2, 3 and 4 where grooves 11, 12, 13 and 14 meet and this entry forces sections 2, 3 and 4 apart. When the sections 2 and 3 move away from the section 4, the thread loop is tightened further and the knot is completed. A locking means (not shown) may be used to prevent the sections 2 and 3 from swinging out too far. This may also be used to enable the sections 2 and 3 to fall by their own weight back into the closed starting position when the knotted yarn is entirely withdrawn from the block shaped body.
Although the illustrative embodiment of the invention describes only a device for tying a single overhand knot, a device could be constructed according to the principles of the present invention which is capable of tying widely varying knots. If desired, the block-shaped body could be constructed using more than the three sections shown and said sections could be joined together other than by means of the hinge construction illustrated in the FIG- URES 2 and 3.
Depending on the denier of the yarns to be joined, the vacuum system of the present invention may be modified to create a higher or lower vacuum for pulling the yarns through the channel in the block-shaped body.
Many further modifications may be made to the present invention without departing from the spirit and scope thereof. Therefore, it should be understood that the invention is limited by way of the following appended claims.
What is claimed is:
1. A device for tying yarn ends together comprising (a) a body having a first opening into which ends of yarn may be inserted,
(b) a second opening out of which said yarn ends may be pulled after being tied,
(c) a continuous channel extending between said openings and having the same general contour of a knot to be tied,
((1) said body being formed by a plurality of sections having mutually abutting surfaces with at least a single groove in each of said surfaces being directly opposite to a groove in another of said surfaces with the totality of the directly opposed grooves forming said continuous channel.
2. The device of claim 1 wherein (a) the plurality of mutually abutting surfaces lies on a pair of intersecting planes,
(b) said body having a yarn entrance path extending from said first opening to the intersection of said planes, and
(c) an exit path extending between said second opening and the intersection of said planes.
3. The device of claim 1 wherein (a) said body is formed by a first section having a spiral-like groove therein, and
(b) second and third sections joined to opposite sides of said first section and having grooves therein which directly oppose each other and the spiral-like groove in said first section when said second and third sections are moved into contact with said first section.
4. The device of claim 1 which further includes means for pulling yarn ends through said continuous channel.
5. The device of claim 4 wherein said pulling means is a vacuum system connected to said second opening.
6. The device of claim 1 wherein said continuous channel follows a circular path in one of said intersecting planes which is connected to a spiral-like path in the other of said planes.
7. The device of claim 2 wherein (a) said body is formed by a first section having a spiral-like groove therein, and
(b) second and third sections joined respectively to opposite sides of said first section and having grooves therein which directly oppose each other and said spiral-like groove in said first section when said second and third sections are moved into contact with said first section.
8. The device of claim 7 which further includes means for pulling yarn ends through said continuous channel.
9. The device of claim 8 wherein said continuous channel follows a first circular path in one of said intersecting planes which continues into a spiral-like path in the other of said planes.
10. The device of claim 7 wherein (a) each of said second and third sections have first and second surfaces thereon lying respectively in said pair of intersecting planes when said second and third sections are in intimate contact with each other and with said first section, and
(b) said first and second surfaces in both the second and third sections having a groove therein with one groove in each of the second and third sections being directly opposite to a portion of said spiral-like groove in said first section when said first, second and third sections are in intimate contact with each other and the other grooves in each of the second and third sections respectively being directly opposite to each other, said opposing grooves in said first, second and third sections forming said continuous channel having a first portion cut from surfaces lying in one of said pair of intersecting planes and a second portion cut from surfaces lying in the other of said pair of intersecting planes.
References Cited UNITED STATES PATENTS 2,705,656 4/1955 Shockry 289-15 X 2,860,902 11/1958 Diels 289-2 2,913,270 11/ 1959 Sachsenroder 289-2 MERVIN STEIN, Primary Examiner.
L. K, RIMRODT, Assistant Examiner.