FI56407C - ANORDNING FOER ATT AENDRA BREDDEN OCH TJOCKLEKEN AV ETT TYG BESTAOENDE AV TEXTILFIBRER - Google Patents

Description

1- .____ I r_, WHEN RELEASE PUBLICATION (11) UTLÄGGN INGSSKRIFT & 6407 C (45) Patent granted 10 01 1930 Patent meddelat V '^ (51) Kv.lk. * / Lnt.CI. * D 06 C 3 / 06 FINLAND - FINLAND (11) p * tenttlh * k * mu * - P «t« nttn * öknln | 96 / 7¾ (22) Htkamitpllvl - Ansflknlnpdif 19.01.7¾ (23) Alkupilvt — Giltlghattdag 15.01.7¾ (41) Tullut Julklsaktt - Bllvlt offwitllg 16.07.7¾

Patents · and registries Nttavik.lpa.on |. the date of the month *. -

Patent · and register register 'AmBku. utlagd och utl. * krift * n pubtlcered 28.09.79 (32) (33) (31) Requested front * —Begird prlorltet 15.01.73 USA (US) 323596 Proven-Styrkt (71) The Kendall Company, 95 West Street, Walpole , Massachusetts, USA (72) Bonaventura Tautvaisas, Quincy, Massachusetts, USA (7¾) Oy Kolster Ab (5¾) Device for changing the width and thickness of a fabric formed by textile fibers - Anordning för att ändra bredden och tjockleken av ett tyg bestäende The present invention relates to an apparatus for changing the width and thickness of a calyx formed by textile fibers, the apparatus having a plurality of spaced apart discs adapted to rotate divergently (i.e., scattered) or convergent (i.e., converging) in the direction of fabric feed. the frames have spaced apart radially extending protrusions for gripping the fabric.

In the manufacture of nonwoven fabrics, the fabric formed by the fibers, prepared by carding raw material rolls or the like, is continuously passed through various processes, such as bonding steps and the like, to finally form the desired end product. However, because the methods used to make nonwoven fabric raw materials currently produce cotton rolls with relatively standardized dimensions, it has been relatively difficult to vary this width in successive processing steps if necessary or simply to obtain a specified width of fabric. Various types of machines have been used for this purpose, with a stretchable transport part, in which case the fabric is stretched or spread by means of a spreading transport part of the machine. However, this type of equipment is prone to damage due to the constant stresses and strains applied to it and is also slow and the width of the fabric coming from it is difficult to control.

56407

Another type of machine used for this purpose is disclosed in U.S. Patent No. 2,709,282 and is mounted thereon with a plurality of discs on a grooved stationary shaft, the fixedly mounted discs being mounted in different directions determined by the grooves. Each disc has a number of needles attached to their outer perimeters and these penetrate the fabric and stretch it as it moves in different directions. Holes are made in the individual discs and the rod is mounted through adjacent openings in the discs and attached at both ends to a pair of gears which in turn are freely mounted on a stationary shaft capable of rotating about it. The discs are rotated in this way to pierce the fabric and move it along the divergent lines formed by the grooved shaft. This type of machine has several drawbacks. For example, needles piercing the fabric cause undesirable holes in the fabric, which adversely affects the strength of the fabric. Also, to change the width of the fabric in such a machine, a whole new set of discs and grooved shafts must be machined to replace the discs and shaft at that time (tilting and slowing down the project at least). In addition, individual discs cannot be moved or moved once they are mounted on the shaft.

It is therefore an object of the present invention to provide an improved apparatus for changing the width, weight and thickness of a nonwoven fabric.

Another object of the present invention is to provide an apparatus which can be economically adjusted to increase or decrease the width of the fabric or at the same time increase / decrease its thickness.

It is a further object of the present invention to provide an apparatus for changing the width and thickness of a nonwoven fabric while forming a uniform weight distribution across the fabric without such a device causing holes in the altered nonwoven fabric.

The device according to the invention is characterized in that the discs are mounted on a motor-driven shaft by means of universal joints, that their projections are flexible and that the device is provided with a comb-like guide for gripping the discs and adjusting their orientation. The circumference of each disc moves around an axis like a gyroscope or gyroscope. Each ring may include an inner ring attached to the rotating shaft by means of two pivots secured to the shaft exactly opposite each other, thus allowing the tire to move freely horizontally with respect to the axis, and an outer ring mounted on two pivoting pins 90 ° in the vertical plane of free pivoting movement with respect to the axis. The discs are mounted divergently with respect to the incoming direction of the fabric to increase its width. After installation in a certain manner, the discs are held in place by means of a control device, such as a cheap plate of self-lubricating anovine material, which is tapered like a chicken. The word shaft And the discs using the stretching point at a given point can be extracted simply by orienting the discs in different ways using the second position of the guide plate. As the fabric moves to the discs on its converging side, the flexible protrusions on the discs then attach to it and then gently pull it in different directions, increasing the width of the fabric and reducing its weight by a word.

Figure 1 is a perspective view of an open fabric extraction apparatus of the present invention.

Figure 2 is a fragmentary top view of the open device of Figure 1.

Figure 5 is a plan view of a disc mounted on a shaft which is hung in the present invention.

Fig. 4 is a perspective view of another embodiment of the orifice guide plate or Va of Fig. 2 *

Figure 5 is a plan view of another embodiment of the disc shown in the present invention.

Fig. 1 shows an open device of the present invention, in which the weaving of the weaving web of the fibers 11 into a fabric casting is transferred to a rotating disc group 15 by means of a conveyor belt 12 or the like, which is attached to a rotating roller drive shaft 14 by means of a support plate. The discs 13 are mounted with respect to a conveyor belt 12 carrying a divergently stretchable fabric and are held in place by a guide device such as guide plates 15 and 16.

The divergence level of each disc can be adjusted separately, since the discs 13 are mounted on a rotating shaft 14 with a cardan suspension arrangement avdla, which allows a hygroscopic or gyroscopic movement. In which case the ring or inner ring 17 is fixed to the shaft 14 by means of a pair of pivoting pins 19, which are placed on the shaft 180 ° relative to each other and which allow this ring and its attached pivot to rotate back and forth in a horizontal plane with respect to the shaft 14 (see Figure 3). ). The second or outer ring 18 is then attached to pivot pins 21 located on the outer circumference of the inner ring 17. in Figure 3). For the purposes of the present invention, the teralt coulter points "and" rotate-pit "refer to bearing-type structures, however, each structure must be acceptable that allows a plane of relatively free rotation about the axis, e.g., as shown in the drawings. 13 free rotation swirling widely in the divergence and convergence directions as the discs rotate 360 °.

The outer circumferences of the discs 13 have a plurality of spaced apart flexible protrusions 22 which emanate therefrom. The abutment protrusions 22, which rotate clockwise with the rotating discs 13, softly engage the incoming weft formed by the fibers and move it forward along divergent lines, causing the width of the fabric to increase and its thickness to decrease. 23 The operation of the device according to the present invention can perhaps be better understood on the basis of Figures 2 and 3, which show a plurality of discs 13 # on a rotating shaft 14 with directions reversed. * The diversity angle is determined and maintained by guide plates 13 and 16, which are shown in combs behind and in front of the discs 13.

Deflected teeth such as 13a and 16a in the guide chamber 13 and 16, respectively, can be mounted at an angle different from the other teeth on them to make the diverging angle of the disc between them different from the angles of the other discs. This possibility advantageously helps to avoid weak points in the stretched fabric. For example, in a test run, it can be seen that a certain portion of the fabric stretches more than is desirable and this can be prevented by simply altering the divergence of the individual aspen by adjusting the difficulty disc or discs, resulting in less stretch or less stretch of the adjacent site. The guide blades are preferably made of a self-lubricating plastic material, such as high molecular weight polyethylene, which does not unnecessarily cause friction when in contact with the rotating discs 13. It should be noted, however, that all types of flexible materials can be used for this purpose. The structure of the guide wall can, of course, be such that the angles of the teeth can be adjusted individually by methods known to those skilled in the art.

Figure 2 shows the turning mechanism of the discs on the shaft, whereby all the discs 13 are initially mounted on the shaft 14 so that they are perpendicular to the shaft. The discs 13 can then be brought closer to each other at one end and held in this position by means of a guide comb 16 and by means of a guide hook 13 placed the diverging ends of the discs on their pods. When the discs 13 are pulled together in this way, it can be seen that the inner rings of the discs have the lime turned towards the center of the structure. However, it can also be found that this new pivot-type disc can be completely pivoted by simply nibbling the corners of the guide bar. In this way, the fabric can be made narrow and thick and heavy, respectively, if the fabric is desired to have these properties.

The second ging roll to control the thickness and evenness of the fabric is the spacing of the intervals of the vivid ornate protrusions on the outer circumferences of the discs 13. For example, in the two end-discs on each side of the hoop 2, the duck has several projections 22 »in these discs» mounted on the shaft 14 »time is made to twist the outer edges of the fabric» which can be prevented »if all the discs 13 have the same number of protrusions 22. Extra outer discs the protrusions help the ny6e to adhere properly to the incoming fabric at the beginning of the protrusion. The number of protrusions 22 of the other individual discs can also be varied if it is thought to be helpful. It can be seen, for example, that a part of the fabric is stretched too much or too little purple, and the number of protrusions 22 can then be increased or decreased, respectively, to achieve the desired uniformity of the fabric.

It should be noted that the higher the number of protrusions on the discs, the more even the elongation is obtained in the fabric and, correspondingly, the more even the weight distribution over the entire width of the stretched fabric.

If all the discs have a diameter, they form a convex curve from end to end when viewed from above (see Figure 2). This can cause difficulties in the protrusions 22 adhering to the fabric, moving it and / or releasing it, because the circumferential speeds at different points are different, because the circular radii of the discs are different. In addition, because the fabric does not arrive on all of the discs in time, it may take some time for the outer discs to adhere to the fabric, allowing it to flex loosely, causing wavy edges, reduced elongation, and uneven weight distribution across the width of the fabric. This light can be avoided in at least two different ways. For example, the diameters of the outer discs may be larger so as to form a substantially straight line when viewed from above. In this case, the discs can stick to the fabric and dispense it substantially at the same time. Figure 3 shows an alternative to obtaining larger discs, in which case an extension sleeve 41 is mounted on the circumference of the disc 43, in which the flexible pins 42 are not increased to increase the effective diameter. Thus, the two discs thus prepared can be used to form a substantially straight line when the discs are viewed from above, with the discs adhering to the fabric evenly and simultaneously.

Another method of adjusting the width and thickness of the fabric when using the new apparatus of the present invention is simply the weathering of the point where the fabric enters the rotating discs. This can be done simply by feeding the fabric to the discs at a point high above, as shown above, so that the fabric exits the discs before being stretched to the maximum possible width. However, this procedure only affects the width and thickness of the fabric and not necessarily its uniformity.

The protrusions 22 are preferably a flexible material that does not pierce or break the fabric, but gently adheres to the fabric and moves it forward by gently stretching. Neopreenl 70, a trade name for synthetic rubber sold by du Pont *, is recommended for this purpose, but some other material made of rubber, rubbery or soft plastic material may work similarly, albeit possibly with slightly lesser results.

Fig. 4 shows a second embodiment of the guide ground, the comb 31 having pin-like projections 35 at an angle of approximately 45 ° to the gap behind each tooth 32. This construction prevents a loose or extra part of the fabric from falling between the discs, which could cause the unit to malfunction.

A preferred groove arrangement for widening a fabric of 100 ohms to 23Ο em could be my next loan of 43 discs mounted on a metal rotating shaft of approximately 20 cm in diameter, each disc having a diameter of approximately 1Θ0 ohm and secured to the shaft by the pivot type joints shown above. The discs are placed on the shaft at 4 * 5 em intervals, each disc being parallel to the adjacent one and perpendicular to the horizontal plane of the shaft. The flexible, neoprene 70 * projections with a height of less than 2.3 ohms are radially circumferentially spaced on the circumference of each disc at 13 ohms, while the two discs at each outermost end in the system are provided with projections extending radially at intervals of 3 ohms so that preventing the outer edges of the stretched fabric from wrinkling. The arrangement further includes guide combs that cause the discs to converge at the device's sloping point, with each disc at a distance of 2.3 em from adjacent discs at that location and 6.3 omtn from adjacent discs at the most divergent position of the discs. In this case, the fabric with a width of 100 em stretches 2.3 times or is approximately 23Ο wide.

It will be apparent to those skilled in the art that various modifications and changes may be made without departing from the spirit and scope of the present invention.

Therefore, only the appended claims are intended to limit the invention.

Claims (4)

An apparatus for changing the width and thickness of a fabric formed of textile fibers, comprising a plurality of spaced apart disks (13,1 + 3) adapted to rotate in planes divergent (i.e., dispersed) or convergent (i.e., approaching each other) with respect to the feed direction of the fabric, and having spaced apart radially extending projections (22,1 + 2) for gripping the fabric, characterized in that the discs (13,1 + 3) are mounted on a motor-driven shaft with OM universal joints (17, 19, 21) and their projections (22,1 + 2) are flexible and that the device is equipped with a comb-like guide (15, 16 or 31) for gripping the discs and adjusting their orientation. Device according to claim 1, characterized in that each universal joint suspension has a pair of pivot pins (19) extending radially from the shaft (1U) and an inner ring (17) mounted on the pivot pins (19) and having pivot tips (21) arranged on the disc ( 18) at the inner edge and placed at an angle of 90 ° to the pivot pins. Device according to Claim 1 or 2, characterized in that the outer discs (13) have more projections than the inner discs. 1+. Device according to Claim 1 or 2, characterized in that the outer discs (13) have a larger diameter than the inner discs or have extension sleeves (1 + 2) which support the projections (1 + 1). Device according to one of the preceding claims, characterized in that the comb-shaped guide (31) has, in addition to the teeth (32) between the discs (13), projections (33) arranged behind the teeth and at an angle of inclination of about 1 + 5 ° to the teeth.