JPS5846580B2 - Method and machine for producing needle threaded fabric - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a needle threaded fabric having a cohesive fiber structure and enhanced fiber entanglement.
bric), which utilizes a new needle machine having an improved device for controlling the feeding of the web composite through the needle threading area. .

In recent years, there has been considerable development in threading fibers to create threaded fabrics.

It is generally known in the textile industry that the density of needle-pierced fabrics can be increased by increasing the depth of needle penetration into the target web or by increasing the number of needle strikes into the web. , an increase in the number of needle strikes can be achieved by passing the fabric through the loom in multiple passes.

Of course, the fabric should be needle-strapped a certain number of times; otherwise, the density of the fabric may damage the needles of the needle loom or cause the fabric to collapse during the next needle threading. It gets to the point where the body itself falls apart.

In order to improve the intertwining of fibers within the needle-threaded fibrous fabric and to improve the physical properties based on the quality of this intertwining of fibers, the depth of needle penetration into the fibrous web should be reduced. It has also been found that the progress of the continuous needle threading operation by one needle must be kept small.

The improved fabrics have brought to light several problems that were only vaguely apparent in the prior art.

Therefore, in previous methods for fabricating fibrous webs, an undesirable surface texture phenomenon, which has been referred to as needle trunking, was unavoidable.

The visible result of this phenomenon is a series of linear scars of varying width and intensity extending in the machine feed direction.

This linear scar effect has been investigated in detail due to the desire to create products with a uniform surface, but the prior art has not been able to accurately elucidate its cause.

However, misplaced needles, bent needles,
Alternatively, it is believed that uneven needles and/or fibrous web feeding intervals are related to the tracking phenomenon.

'Textile Month', printed in 1970 at Buxton Press, Buxton, Derbyshire, UK
``Problems Regarding Needle-Threaded Non-Woven Nidracking'' Part 1 - ``Causes and Effects'' written by Mr. G-young in the February and March issues, respectively. The second part of the article, ``Some Solutions,'' describes the research efforts made to investigate the causes of linear surface tracking, as well as the methods developed as a result to eliminate said linear surface tracking. The method is described.

Although a definitive solution to the tracking problem could not be found, the results obtained indicate that as the distance between successive needle positions by one particular needle decreases,
That is, it has been found that as the number of consecutive stitches per linear inch (approximately 2.54 crI'L) increases, the tracking becomes sharper.

Accordingly, in order to alleviate some of these disturbances, the Young reference indicates that it is practical to increase the distance between successive needle locations.

Young also shows that the tracking properties can be influenced by moving the fibrous web transversely to its feeding direction.

However, tracking still exists and is essentially just a change in surface appearance.

Somewhat similar to the approach suggested by Mr. Young, 1
Clara (Kuts) published on October 27, 970
U.S. Pat. No. 3,535,756, et al., suggests using a needle loom's pull rolls to impart lateral motion to the web during threading operations, thereby imparting vibration to the web.

Basically, the web has a restrictive entrance that guides the web into the needle threading area during the needle threading operation.
ve 1nlet throat) is maintained under tension.

However, as far as the method of Clara et al. is concerned, the distance between successive needle positions is conventional by conventional machines using conventional methods.

The conventional distance between successive needle locations with a particular needle is typically at least one inch (approximately 0.635 CrrL).
It is.

As illustrated in the Young article, linear tracking tends to be relaxed as the distance between successive needle locations increases.

Similarly, Clara et al. do not propose a method to reduce tracking during the needle threading process by utilizing a distance different from the conventional distance between needle driving positions.

Other proposals include O'Byrne's U.S. Patent No. 31, issued September 29, 1964.
No. 50434 suggests passing the fibrous web through the needle threading zone with intermittent movement and imparting a reciprocating motion to the web as it passes through the needle threading zone.

Here again, conventional distances are assumed for the distance between successive needle stick positions.

As can be seen from the above summary of related prior art - efforts to reduce dollar tracking and improve surface appearance have been
Consecutive needles with one specific needle ■ Conventional distance between puncture locations, usually at least one inch (
approximately 0.635 cIrL).

Unfortunately, conventional distances between successive needle locations with one specific needle do not always yield the excellent fiber entanglement and cohesive fiber composition desired in a variety of products. Therefore, it was necessary to shorten the progress of the needle stick operation amount by a specific needle.

This tracking is a much more serious problem than tracking in conventional needle threading fabrics, since appearance is a primary concern with such superior needle threading fabrics.

Without being bound by theory, it is clear that the fiber entrainment obtained by keeping the distance between successive needle points relatively short (i.e., the fiber wrap that is achieved by keeping the distance between successive needle points) is actually a It is believed that the needle is guided back into the previously threaded area, increasing the tracking disturbance.

Therefore, if the distance between needle insertions is made shorter,
Tracking creates rows of closely threaded fibers separated by relatively few threaded fiber sections, giving the appearance of a field that has just been plowed.

Linear surface tracking of the above-mentioned properties in such superior products is not necessarily desirable in cases where such tracking affects the interior of the fibrous body and the threaded fabric It should be understood that this gives rise to non-uniformities in properties which often become apparent when tension is applied.

In order to alleviate tracking of this nature in such superior products, it has been found that special measures are required to reduce the tendency of successive needles to follow the path traces of previous needles. .

Briefly, needle threading is carried out with a relatively low tension in the web, preferably the minimum tension necessary to uniformly feed the needle loom needle nib, and with short intervals between successive needle sticks. It is necessary to do so.

Furthermore, it must be possible for the web to move freely laterally while passing through the needle threading area.

Furthermore, it is generally important and recommended that the amplitude of lateral movement of the web decrease as it passes through the needle threading zone.

It has been incidentally discovered that by providing such conditions during the needle threading operation, the above-mentioned tracking is not only substantially reduced, but also the needle threading effect exhibited by the physical properties of the resulting fabric is significantly increased. It was done.

For purposes of this specification, a relatively short distance between successive needle sticks is defined herein as a distance that allows a subsequent needle stick to engage the fibers entangled by a previous needle stick.

Generally speaking, the wrapping of fibers with the above-mentioned properties is
One particular needle measures 1 inch in a straight line (approximately 2.54c1
11) Achieved when at least 7 needlesticks are performed per needle.

The present invention is characterized by structural retention.
The present invention relates to a new method for producing needle threaded fabric from a web or composite of fibers having some degree of grit, and to a machine for implementing this method.

Throughout this specification, the term "a web of fibers with some structural retention" refers to a loosely intertwined web of fibers that has been threaded at least once to impart some structural retention to the web. or loosely threaded "temporary" needles to give a composite, i.e. web, substance or structure retention so that the process of the invention can be carried out on the web as it moves. Defined as a loosely entangled web of fibers provided with a core material such that a structure consisting of an entangled web of fibers is present.

Of course, this term also includes webs that pass through more than one pass during the threading operation to ensure structural retention.

Our Belgian Patent No. 794,594 and our Japanese Patent Application No. 10,711 of 1972 describe the processing method to which the present invention relates.

According to this method, the web or composite is moved through the needle loom under a minimal amount of tension to allow it to move freely and randomly in the lateral direction as it passes through the needle loom. will be delivered within.

By minimizing tension in the machine direction on the web, the web or composite will wobble slightly laterally as it passes through the loom, and this random lateral movement will cause the needles to The effect of threading motion is improved.

As mentioned above, in order to eliminate tracking disturbances, the web is free to move transversely to its movement in the feeding direction so that the desired needle threading motion can be performed. It is important that needle threading is done under minimal tension.

For example, this can be achieved simply by allowing the web to swing freely enough to wobble in an uncontrolled and random manner as it is fed into and passes through the needle threading area.

This means that there are no special guiding devices.

However, this free rocking of the wafer may prevent the feeding of the web into the threading area or cause the web to fold or overlap as it enters and passes through the needle threading section. , or be left in a mess.

Of course, this minimum tension must also maintain movement of the web into the needle threading area.

These conditions then cause this minimum tension to cause random wobbling for the preferred embodiment.

However, when making relatively high-grade needle threaded fabric products, such unpredictable and random wobbling of the web is insufficient to eliminate linear surface tracking and internal structure non-uniformities. It is not possible to obtain accurate translational motion.

In such cases, it is recommended that active means be provided to feed the web under minimal tension and to actively guide or vibrate the substantially tension-free web before it enters the needle threading zone. be done.

When applying this positive vibration, do not apply positive vibration to the web coming out of the needle threading area (on the contrary, it is better to apply the vibration before the web enters the needle threading area). is important.

Vibrations from the outlet end of the needle threading region cannot completely transmit rearward vibrations to the web located within the needle threading region.

Therefore, in this embodiment of the invention, vibration must be applied from the entrance end of the needle threading region.

In this sense, the present application provides an apparatus and method for controlling the processing steps described in the aforementioned patent applications.

Predictable control over the processing steps allows the processing steps to be more controlled in throughput and processing speed, and to yield more uniform products.

A fibrous web having some structure retention properties is advanced from a source to a needle threading zone, but before it enters the needle threading zone, the web is advanced from a source to a needle threading zone prior to the entrance to the needle threading zone. Loose part (festoon)
) or the like, and is then actively placed in a substantially tension-free state and then fed in this state through the needle threading area.

Advancement of the web is effected by a pull roll located at a point remote from the exit of the needle threading area.

These pull rolls may be rotated continuously or in steps.

By subjecting the fibrous web to a substantially tension-free condition prior to needle threading, the portion of the web that is within the needle threading area or region is maintained even if the pull roll is continuously rotated. Even if a needle were to penetrate the web and the web would be momentarily pinned down between the needle threading area and the pull roll, it would remain substantially relaxed.

By leaving the web at the entrance untensioned, slack is provided to the web at the needle threading area to allow the needle to achieve its intended purpose.

In addition to the above, the advancement of the web towards the needle-threading zone is provided with a reciprocating motion transverse to the direction of movement of the web through the needle-threading zone at the entrance to the needle-threading zone. .

Thus, throughout the needle threading area said web has:
This results in a periodic vibration in which the translational swing width decreases toward the front.

Vibrations caused by side-to-side lateral movement of the untensioned web just before the entrance to the needle threading area are not transmitted rearward through the web to the web source.

This is because the means by which the needle threading area keeps the web substantially tension-free before the entrance absorbs said vibrations.

As mentioned above, since the pull roll is located on the exit side of the needle threading area and away from the exit,
Said vibrations are spread over the entire needle threading area.

For the purposes of this specification, "needle-threading area" or "needle-threading area"
is defined as the part between the feed roll and the pull roll in a needle loom.

In this area there are one or more needle posts arranged on one or both sides of the web to be threaded, with needle posts arranged in a continuous row. A group of needles is provided.

In the present invention and one preferred embodiment thereof, a chain entanglement of fibers is created in the needle threading region, which chain entanglement of fibers is described in U.S. Pat. No. 3,112,552. It can also be produced by a needle loom such as that described in No. 3,132,406.

The contents of these two U.S. patents are cited herein:
The chain-like entanglement of fibers disclosed therein is referred to as a technology with the trademark "FIBERWOVEN J" or "FIBERWOVEN loom", but for convenience in this specification, this term will be used hereinafter. I decided to use it.

"Chain-like interlocking" refers to the intermingling of fibers to obtain cohesiveness from the continuous interlocking of fibers oriented along the length of the fabric surface.
g), interlooping of fibers
) and/or interlacing of fibers
It is defined as.

Briefly, the term "circular bonding" is defined as the bonding of fibers together beneath the surface of a web or equivalent of loosely intertwined fibers.

The fiber-to-fiber bonding is accomplished by threading other fibers through a pre-oriented loop of fibers below the surface of the web.

The annular bonds of fibers are similar to knitted fabrics.

This is because the annular bond provides intertwining of the fibers through ring engagement rather than bonding through a tying action.

In contrast, the term "interlacing" is defined as the bonding of fibers from one outer surface of the web to the other outer surface first.

Such interlacing of fibers is somewhat similar to a stitching action, although not by continuous needle movement.

In this interlacing action, the fibers lying near one surface and/or the ends of the fibers near one surface are carried into the body of the web and are then oriented in exactly the same way as the stitching action. At least some of the fibers are brought back towards the first surface through another path by fibers from the vicinity of the other surface and/or by fibers near the other surface, since the fiber-to-fiber bonds are below the surface. This is distinguished from the annular bonding action which is limited to the fibers of

The present invention does not necessarily include "fiber woven" (FIBE).
It should be recognized that this does not require the use of a "RWOVEN" loom.

This is because, although other types of needle looms may be utilized, such needle looms are not capable of creating a chain-like intertwined array of fibers throughout the needle threaded fabric.

The needle threaded fabric produced by a conventional needle loom using the present invention has better needle efficiency without the linear needle pattern or needles across the fabric surface that is usually unavoidable with conventional needle looms. Therefore, the intertwining of the fibers is enhanced.

A recommended novel product according to the present invention is U.S. Pat.
No. 12552, FIG. 15, results from the condition that the chain-like intertwined rows of fibers are generally not straight or parallel to each other, but
Said rows have a meandering or substantially sinusoidal shape when viewed in plan, some of them have different swing widths than others, and these rows They intersect each other along the length of the continuous fabric product.

“When using FIBERWOVEN J technology, intertwined chains are actively interconnected by intersecting each other at acute angles.

The new product described herein increases fiber entanglement by approximately 20% compared to conventional needle threaded fabrics by specifying the number of needle threads per unit area.

Needle threaded fabric bodies according to the present invention can be used in finished products such as blankets, clothing, fabrics, or the like that are washed or dry cleaned, and can also be used in carpets, upholstery materials, and artificial leather and the like. It can be used as a dense fibrous fabric such as the equivalent.

Alternatively, needle threaded fabrics according to the present invention may be used in filters, felts, and other products requiring external uniformity and a tightly intertwined cohesive fiber structure.

Referring now to the drawings, in which equivalent or identical parts are designated by the same letters or symbols, FIG. is schematically disclosed.

More specifically, a web feed roll 10 rotatably supported on a frame 12 provides a source of a fibrous web 14 having some cohesiveness in construction.

The web of fibers may be pre-needle-threaded or
Alternatively, the web may be a web in which the fibers are loosely intertwined with a core material.

However, in the case of webs consisting of loosely intertwined groups of fibers in a core material, the needle threading or "temporary" needle threading is usually carried out after carding the web, and the web is fed directly to a needle loom. be done.

The roll 10 is provided with a gear 16 at one end thereof,
An endless drive chain 18 extends around this gear.

This drive chain 18 is driven by a gear 20 on the drive shaft of a variable speed electric motor 22 with a speed control 24 .

This motor drives the roll once in the direction of arrow C,
The web 14 is arranged in a multi-passageway (mult passageway) indicated generally at 26.
ti-pass) type needle loom.

This needle loom 26, although shown schematically, is generally of the type disclosed in U.S. Pat.
8 and 30.

Of course, the web 14 is similar to that described in the aforementioned U.S. Pat. No. 31,324.
Although fed into both zones through a different feed path than that shown in No. 06, one skilled in the art will appreciate that the web is in fact identical to the manner disclosed in that patent. It can be seen that it can be provided in the following manner.

Each needle threading area or region 28 and 30 is connected to the swing arm 3.
It includes two pairs of needle stands mounted at 2 and 34.

These two pairs of needle posts are arranged to pivot about axes 36 and 38 such that each pair of needle posts alternately pierces the web 14 passing through the needle threading area.

In the preferred embodiment, each pair of needle posts has an upper needle stock and a lower needle stock with a number of consecutive threads transverse to the direction of the machine. A group of needles are arranged in a row.

The group of needles on the upper stage travels along a path that is approximately a mirror image of the path of the group of needles on the lower stage.

By feeding and controlling the web, a chain-like entanglement of fibers can be obtained.

Referring first to the needle threading area 28, the needle threading area 28 includes a first pair of needle posts 40 and a second pair of needle posts 42. It will be appreciated that immediately adjacent to the inlet side of 28 there is a freely pivoting or freely rotating translation roll 44 over which the web is threaded into the needle threading area.

A slack section 46 is formed between this roll 44 and the roll 10, which provides a substantially tension-free condition for the web 14 being fed to and passing through the needle threading area. .

On the discharge side of the needle threading section or area 28, there is a pair of actively driven pull rolls 48 and 50 located remote from the exit of the needle threading section.

The web is directed upwardly over the rolls 48, through the interlocking portions of the rolls 48 and 50, and under the rolls 50 towards the upper needle threading area 30.

With reference to FIG. 4 of the drawings, it will be appreciated that the roll 44 is a freely rotating roll and is rotatably mounted on a non-rotating shaft 52.

This roll does not include any means for actively rotating it.

The shaft 52 is provided with collars 54 (only one of which is shown in the figure) for preventing axial movement but allowing rotational movement of the roll 44 relative to this shaft.
are provided so as to be in contact with each side end portion of the roll 44.

Each end of the shaft 52 extends through a bearing arrangement 56 (only one of which is shown) provided on each side of a frame 58 of the loom 26.

One end 60 of the shaft 52 is bifurcated to receive one end of a crank arm 62 carried by a crank 64.

The crank 64 is rotated by a variable speed motor 66 via a transmission 68 so that rotational movement is imparted to the shaft 52.
is converted into a reciprocating motion.

The length of the reciprocating stroke of the shaft 52 can be varied by adjusting the position of the crank arm 62 relative to the crank 64 by adjusting means 70.

An idler roll 72 carried on a shaft 74 with its end extending into a groove in a U-shaped bracket 76 forms the portion of the nip through which the web passes.

As the web 14 is pulled through the needle threading area 28 by the pull rolls 48 and 50, it causes the two rolls 44 and γ2 to move along their respective axes 52.
and 740.

However, during actual operation, the electric motor 66
4, the crank arm 62 is driven to cause the shaft 52 to reciprocate back and forth, but at this time the shaft 52 is not rotating.

Collars 54 and 73 on the two shafts rotate each roll 44 and 72 together with the two shafts while the rolls 44 and 72 are rotated by the web drawn into the loom. move.

The roll 72 is provided when the web is moistened to facilitate needle threading.

The dead weight of this roll 12 applied to the web is sufficient to squeeze out excess needle threading fluid from the web so that the web remains adequately moist during the threading process.

Both rolls 44 and 72 may be steel rolls, one or both of which are covered with a friction material, such as a textured rubber cover or the like.

The purpose of reciprocating the roll 44 and the slack portion 46
A more detailed explanation of the purpose of is provided later in this specification.

Now, referring to FIGS. 2 and 3, the roll 48
The bearing 80 has a frame 58 at both ends (only one of which is shown in the figure).

) will be noted to have one shaft 78 extending through it.

Referring to the broken section of FIG. 3, the shaft 82, which is journaled at both ends in bearings 84 (only one of which is shown) in the frame 58, has a Woodruff key.
It can be seen that the roll 50 and the gear or pinion 86 are keyed by a uff key 88 or the like.

Similarly, the shaft 78 and roll 48 are keyed to each other and to a pinion 90 that meshes with the pinion 86.

Gears or pinions 92 and 94 are provided at the outer ends of the shafts 82 and 78, respectively, but these two gears or pinions do not mesh with each other.

As shown in FIG.
0 and an endless gear chain movable around this gear 100 and said gear 920 are driven via a transmission 98 so that the shaft 82 causes the roll 50 to rotate.

When the roll 50 is rotating, this roll 50
The roll 48 is rotated via two meshing gears 86 and 90.

An endless gear chain 104 moves around said gear 94 and also around a gear or pinion 106 attached to a shaft 110 carrying a feed roll 112.

The feed roll 112 cooperates with the 20th feed roll 114 via meshing gears to drive this feed roll 114 once.

The web 14 moving upwardly from the pull rolls 48 and 50 then moves around the feed rolls 112 and 114 and then forms a second slack section 116 to reduce the tension in the web. are doing.

The web 14 forms a slack section or loop 116 in which it is relaxed and substantially tension-free, and then attached to the non-rotating shaft 120 in a manner similar to the attachment of the free-rotating roll 44 to the non-rotating shaft 52. It passes over a free-rotating roll or translation roll 118 which is mounted on a shaft and can rotate freely.

The shaft 120 is connected to the crank arm 62 shown in FIG.
and is connected to a crank arm 122 which is also operatively provided.

The web then reaches an upper needle threading area 300 Å opening having two pairs of needle posts 124 and 126, respectively.

The web is then threaded in this threading area 30 in substantially the same manner as in the area 28 described above.

A further pair of pull rollers 128 and 130 are positioned remote from the exit of the needle threading section 30.

These pull rollers are provided with intermeshed gears 132 and 134 at one end of each of them.

The lower pull roller 130 is driven by a variable speed electric motor 136 via an endless chain 138.

The needle threading fabric produced from the threaded web 14 in the needle threading areas 28 and 30 is
Next, the idler roll 14 supported on the frame 142
0 and is wound onto a fabric wrap or roll 144 carried on a frame 146.

The dough spool or roll 144 is driven by a single drive chain 148 driven by a variable speed electric motor (not shown) similar to motor 22.

The pulling rolls 48 and 50 are the rolls 112 and 11
It is driven at the same speed as 4.

Additionally, pull rolls 128 and 130 are also driven at the same speed as the previously described rolls.

Therefore, once motors 96 and 136 are properly synchronized at the desired speed, it is no longer necessary to adjust the rolls.

However, the feed roll 10 changes its diameter during operation.

Therefore, the operator must adjust the speed of motor 22 via controller 24 to occasionally superfeed the web into slack portion 46.

The opposite is true for the take-up roll or dough roll 144.

As shown in FIG. 1, the grooves 46 and 30 are arranged to relax the web before it enters the respective needle threading zones 28 and 30 to provide minimal tension in the web in both of these zones. 116 may be created by a long bar or long roller 150.

The purpose of this bar is to control the back and forth flapping of the slack sections or loops due to the reciprocal translation of the web on each roll 44 and 118.

With this configuration, the slack portion absorbs rearward movement of the web due to vibrations and prevents this movement from extending rearward beyond the point of departure of the feed roll 10 or feed roll 114.

The two rods or rollers 150 are of cylindrical shape and may be slightly overloaded if necessary to adjust the tension of the web entering each needle threading area 28 and 30.

As mentioned earlier herein, the web is in a substantially tension-free state as it enters each entrance of each said needle threading zone and when it is within each needle threading zone.

The reciprocating translational motion of the rolls 44 and 118 applies a range of from 0.5 inches (approximately 1.27 crfL) to 2.5 inches (approximately 6.35 crrL) per cycle to the web at the entrance to the needle threading zone. The amplitude of this vibration cycle of the web is such that it causes vibrations during the movement of the web, and the amplitude of this vibration cycle of the web decreases towards the front throughout the needle threading area, and at the exit of the needle threading area its range is 0.1. inch (approximately 0.254 cm) to 0.3 inch (approximately 0.762 CIrL).

From that point the web is advanced such that each needle driven into the web produces a substantially sinusoidal path.

The amount of web advancement per each cycle of translation or vibration is 3
Inch (7,62 CrrL) to Finch (17,78 CrrL)
CIIl) range.

During the same cycle of vibration, the aligned needles preferably pierce the web about 50 to 100 times.

One important factor is the location of the next aligned needle piercing point relative to the aligned needle piercing point.

If the web has been pre-needle-threaded to some extent, the pre-oriented fibers will often act as a guide and even deflect the needle to the side of the intended piercing point.

If the next needle passes through the path in which the previous needle has worked, said next needle will not be able to engage the fibers that were made immobile by the previous needle threading, and therefore the entanglement will occur. It gets blocked.

In the present invention, it is realized that by moving the needle unevenly laterally, the deflection of the needle by previously imparted fiber orientation can be reduced and entanglement and threading efficiency can be increased. Understood.

Between each successive piercing position, the lateral movement of the piercing path of one particular needle in the aligned needle group should be varied, but the range of variation is limited to that of one needle blade. It is recommended that it should be at least - to twice the maximum.

The lateral movement of the web may vary from substantially zero to an amount equal to the amount of longitudinal advancement between successive needle locations at the entrance to the needle threading zone.

A typical example of needle threading to obtain a denser needle threading fabric with 20% more fiber entanglement is as follows.

The web has a feed rate of 42 per minute in the needle threading area.
inches (approximately 106.68 CrfL), the web was reciprocated at a rate of 10 cycles per minute in a direction transverse to the direction of web movement through the needle threading zone.

In the needle threading area, each needle of each needle stock in each pair of needle stocks has a width of substantially 20 mils (about 0.504 mm).
) needle punched the web 850 times per minute.

Due to the above conditions, the runout width of the chain-like entanglement of substantially sinusoidal fibers in the first needle row is 0. finch (approximately 1.778 Crn), and the runout width at the last needle row near the exit in the second pair of needle stands is 0.1
inch (approximately 0.254 CrIL).

FIG. 5 schematically shows the web 14 passing through a needle threading area with two needle rest pairs 40 and 42. In FIG.

Four needles are shown, each with N1. N2. They are represented by N3 and N4.

From this schematic diagram, it can be seen that the sinusoidal path provided by needle N1 has a greater swing width than the path provided by needle N2, and this also means that needles N3 and N4
Notice that the same is true for .

The path of the needle is substantially sinusoidal and this chain-like interlock appears along the entire length of the fabric body.

As one skilled in the art will appreciate, each needle rest includes a group of needles extending laterally and arranged in slightly spaced rows offset from each other; The sinusoidal path of the chain-like intertwining of fibers traverses the sinusoidal path of each other needle.

Figure 1 of the drawings shows that the web 14 is freely rotating and active in order to impart movement transverse to its feeding direction to the web 14 as it enters the needle threading area 28 from the loose slack portion 46. Although the use of reciprocating rolls 44 that are controlled by the user is shown, the web 14 is fed straight to the needle threading area from a supply roll or fabric spool 10 with slack in between. It will be appreciated that the fabric wrapper and supply roll 10 could be actively reciprocated in place of roll 44 to impart lateral movement to the web.

In this embodiment of the invention, a freely rotating roll 44 is substituted for the freely rotating and reciprocating roll 44, and a feed roll or dough roll is provided while the dough roll is still being driven at a speed that creates slack. Each would require a device for actively reciprocating the entire 10.

Referring to FIG. 6 of the drawings, there is shown diagrammatically another embodiment of the invention.

Here, the web 14 is guided into the needle threading zone 28 in a substantially tension-free manner and without any active device for moving the needle nib in a direction transverse to its feeding direction.

In this embodiment of the invention, the web 14 is fed from a supply roll or spool 10 over a driven rotating roll 11 that is wider than the width of the web and into a J-shaped box 13 that is also wider than the width of the web. sent.

Since the J-shaped box 13 is thicker than the web 14, the web is folded haphazardly into the J-shaped box.

To facilitate folding of the web within the J-shaped box,
The roll 11 may be replaced by an oval driven roll (not shown) for effecting the folding, but the folding of the web will still result in a haphazard or irregular fold.

The web 14 passes from the J-shaped box 13 over freely rotating rolls 15 to the needle threading area 28, but with random or irregular folding of the web in the J-shaped box and of the web in the feeding direction. It becomes tensionless and moves haphazardly in a direction transverse to its feeding direction as it passes through the needle threading zone.

In other words, it curves. The arrows shown in FIG. 6 represent a random lateral movement of the web 14, as opposed to the positive reciprocating movement referred to with respect to the embodiment of FIG.

After the web 14 has completed needle threading in the needle threading zone 28, the web 14 passes around the remotely located, actively driven pull rolls 48 and 50 of the roll 14 of FIG.
4, or to a second needle threading area (not shown), such as needle threading area 30 of FIG.

Although the J-shaped box 13 is described as a conventional type having an inlet and an outlet, it goes without saying that the support plate has side walls or inner walls in the conventional J-shaped box. It is also possible within the scope of the invention to use non-metallic or plastic supports.

In practice, a J-shaped box 13 or support plate (not shown) forms a slack section 14 in the web 14 just before the entrance to the needle threading area 28, which enters said entrance and feeds into the needle threading area. The slack portion is supported at the lowermost end of the loop to reduce the weight of the web.

Thus, the web in the needle threading area has
Less tension will be applied than the simple slack section described in the embodiment of FIG.

A variation of the invention, shown in FIG. 6, is achieved by replacing the freely rotating roll 15 with a reciprocating roll, such as the roll 44, or by actively reciprocating the roll 11. Further deformation can be achieved by providing positive means for moving the web transversely to its feeding direction.

In a preferred embodiment, "FIBERWOVE", which has a chain-like intertwining of fibers, is used.
N)J technology, but one skilled in the art will appreciate that this improved needle threading characteristic utilizes web vibration and is substantially tension free as the web enters and passes through the needle thread area. It will be appreciated that this can also be obtained from conventional needle looms by relaxing the web at the entrance to the needle threading area up to a point.

The presence of tension in the web in the needle threading area does not improve fiber entanglement, but only eliminates some needle tracking.

The terminology used herein is for purposes of explanation only and not for limitation, and the scope of the invention is limited by the claims.

[Brief explanation of drawings]

FIG. 1 is a schematic perspective view of a FIBERN loom used in accordance with the present invention, which induces vibrations to the web in each needle threading zone as the web enters each needle threading zone; It shows the web reciprocation for. FIG. 2 is a partial side view of the loom taken from arrow A in FIG. The driving device is shown. 3 is a partially sectional elevational view taken substantially along line 3--3 of FIG. 2; FIG. FIG. 4 is a partially sectional elevational view of a drive device for reciprocating the web transversely to the direction of movement of the web through the needle threading area, as seen from the direction of arrow B in FIG. 1; It is a diagram. FIG. 5 is a schematic plan view showing the needle threading path of a particular needle in the needle threading zone when the web is moved transversely to the direction of movement of the web through the needle threading zone. FIG. 6 is a schematic diagram showing a modified configuration of the present invention,
Here, the web is guided into the needle threading area in a tension-free manner and no active device is provided for moving it transversely to the feeding direction of the web. 10... Feeding roll, 12... Frame body,
14... Web, 18... Endless drive chain, 22... Variable speed electric motor, 24...
... Speed control device, 26 ... Needle loom, 28, 30 ... Needle threading area, 32.34 ...
...Swinging arm, 40, 42... Needle rest, 44.
...Translation roll, 46...Sag part, 4
8゜50... Pull roll, 62... Crank arm, 64... Crank, 66...
...Variable speed motor, 68...Transmission, 72-°゛...Idle roll, 88...
...Wood grain key, 98...Transmission, 102,104...°°...Gear chain, 11
2.114... Feeding roll, 116...
・Sag part, 118...Translation roll, 120・
...Non-rotating shaft, 122...Crank arm, 124,126...Needle rest, 128,130
...Pull roller, 138...Endless chain, 144...Dough winding (take-up roll),
146...Frame body.

Claims (1)

[Claims] 1. Advance the fibrous web into the needle threading area and through the needle threading area such that relaxation of the fibrous web results in a minimum tension on the web in the needle threading area. actively controlling the web to create a controlled lateral rocking motion against the web within the needle threading zone; and needle threading the resulting needle threaded fabric from a fibrous web having some structural retention, the needle threading fabric thus obtained having improved fiber entanglement. 2. A needle loom having a needle threading region with an opening and an outlet, and a device for feeding a fibrous web having some structural retention properties into and through the needle threading region in a substantially tension-free state; An improved textile comprising a device for imparting a controlled lateral rocking motion to the web in the threading region as the web moves in the machine direction, and a device for withdrawing the threaded fabric body from said outlet. □A machine for creating needle threaded fabric with intertwining. 3. A needle loom having a needle threading area with an opening and an outlet, a source of a fibrous web with structure retention properties, a device for drawing the web through the needle threading area in which the fibrous web is threaded, and positioning the web transversely to the direction of movement of the web through the needle threading region to cause the web to vibrate so that its swing width decreases over the entire needle threading region as the web moves forward; and a device for imparting a substantially tension-free condition to the web in front of the inlet, said last-mentioned device also returning vibrations of said web to said source. A machine for producing needle threaded fabric bodies having improved fiber entanglement.