US3059285A

US3059285A - Bronzini

Info

Publication number: US3059285A
Authority: US
Publication date: 1962-10-23
Anticipated expiration: 1979-10-23

Description

Oct. 23, 1962 F. BRONZINI 3,059,285

DEVICE FOR MACHINES AS USED IN PREPARATION FOR SPINNING, ADAPTED TO FACILITATE THE CONDENSATION OF WEBS Filed March 31, 1960 5 Sheets-Sheet 1 I m Ll- (DB-l N II Bk WWI-LN IIIU ILIII! I Ill I II-r ATTORNEYS Oct. 23, 1962 f F. BRONZIN. 3,059,285

DEVICE FOR MACHINES AS USED IN PREPARATION FOR SPINNING, ADAPTED T0 FACILITATE THE CONDENSATION OF WEBS Filed March 31, 1960 5 Sheets-Sheet 2 AWrhey Oct. 23, 1962 BRONZlNl 3,059,285

DEVICE FOR MACHINES AS USED IN PREPARATION FOR SPINNING, ADAPTED TO FACILITATE THE CONDENSATION OF WEBS Filed March 31, 1960 5 Sheets-Sheet 5 Fig.5

United States Patent O 3,059,285 DEVICE FOR MACHINES AS USED IN PREPARA- TION FOR SPINNING, ADAPTED T FACILI- TATE THE CONDENSATION 0F WEBS Felice Bronzini, Corso Sempione 65, Milan, Italy Filed Mar. 31, 1960, Ser. No. 18,984 Claims priority, application Germany Apr. 3, 1959 3 Claims. (Cl. 19-150) The present invention relates to improvements to be introduced into so-called non-winding-up devices, which are devices adapted to prevent the adherence of fibres to members of textile machinery, such adherence being caused by electricity formed in said fibres.

As is well-known, the electricity that is originated in the fibrous material which is subjected to the treatment of drawing frames, combing machines etc. has ever constituted a serious problem, which has become more aggravated due to the high speeds attainable at present with machines of such kind, especially of the types called Gill- Box and Intersecting Comb, wherein the control of the combs is effected with endless chains.

-In particular, it happens that the fibrous material, specially wool and synthetic fibres, has a tendency to adhere to the drawing members, thereby causing undesirable winding-up on said members with objectionable consequences due to loss of time and material.

Said inconvenience has been satisfactorily eliminated by means of a device called non-winding-up which is placed at the exit of the drawing rollers, as close as possible to said rollers.

In said device there are metallic parts which continuously perform a stroke and pass before the exits of said rollers. Owing to an attraction on said electrized fibres, the latter tend to leap onto the metallic parts of the device and the electrical charge is grounded through the frame of the device.

With this device one solves the above mentioned problem, however there do not disappear the inconveniences originated by the so-called loose fibres which are at the borders of the webs of the various textile materials at the exits of the drawing rollers.

These so-called loose fibres disengage from the central core when the webs run athigh speed, and can escape from the control of the collectors or funnels which are generally provided in the exit portion of these machines or the fibres on arriving at the end of the path, abandoned by the non-winding-up devices, cause considerable incon veniences.

For instance the fibres sometimes adhere to said funnels so that a certain amount of fibres accumulates and, at a certain time, such mass of fibres, sticking to the borders of the funnel, becomes gripped by the main core of the roving which drags it along with it whereby irregularities are produced due to undue superimposition of fibres.

Or it may happen that said fibres proceed in the path while adhering to the nonwinding-up device, disengage from the remainder of the mass and are gripped by the cleaning elements, whereby irregularities are produced due to the escape of lateral fibres.

A main object of the present invention is to provide effective means for facilitating the transformation of the web of fibrous material into a uniform roving formed by the totality of the fibres delivered by the drawing rollers.

Said means are constituted by endless chains or belts equipped with pins or fins conveniently spaced apart from one another which are combined with the non-windingup device in such a manner as to become introduced between the metallic rods or sticks of said device, at the point at which they start their horizontal movement, namely in front of the drawing rollers; these pins or fins projecting above said rods and proceeding therewith in 3,059,285 Patented Oct. 23, 1962 the horizontal path, while disengaging from said rods at the end of said path.

The chains forming part of the device according to the present invention should be placed in inclined direction in respect of the flanks of the non-winding-up device, so that the fins or pins carried by said chains are at a certain distance from one another at the point at which their engagement with said non-winding-up device begins and subsequently while proceeding in a direction away from the drawing rollers, the chains carrying the pins or fins converge towards the center of the non-winding-up device. In this way, by means of the collecting or condensing elements constituted by said pins or fins, which project above the surface of the non-winding-up device, a perfect collection or condensation of the fibrous material is effected which is met on the said non-winding-up device including the loose fibres which generally are met at the borders of the fibrous web, so as to forward to the funnels a compact and uniform roving.

The advantage afforded by the present device resides mainly in the fact that said collecting or condensing elements move with the non-winding-up device in such a Way as not to have any relative speed between the collector and the fibres composing the web, in the direction of forwarding; said absence of relative speed being the main cause of the perfect union or condensation of the spread fibres, as distinguished from conventional devices wherein there are fixed lateral guides to which said fibres may adhere.

An example of embodiment of a device according to the invention will be described hereinafter with reference to the accompanying drawings, wherein:

FIG. 1 is a diagrammatical view in plan of the device;

FIG. 1a is a fragmentary, detailed view of the connection of the bar 7 with the chain 6;

FIG. 2 is a sectional view taken on the lines IIII of FIG. 1;

FIG. 3 is a' detailed top plan view of the mounting arrangement of one of the fins of the device;

FIG. 4 is a section taken on the lines IVIV in FIG. 3; and

FIG. 5 is a section taken on the lines V-V in FIG. 3.

In FIGS. 1 and 2. there is shown the no-n-windng-up device constituted by the spaced apart chains 15 carrying the transverse bars 7. Each chain 6 is passed over sprockets or

toothed wheels

8, 9, 10 and 11. The sprocket 9 is the drive wheel and is fixed on the shaft 20 which is driven by a motor. The wheels or

sprockets

8, 10 and 11 are journalled on a fixed frame 22.

Each bar 7 is connected at its ends with the spaced apart chains 6 by means of two pins extending from the two chains in crosswise direction and penetrating into cavities in the ends of the bar.

The device for the uni-on of the fibres, according to the invention, is constituted by two endless chains 1 each of which is rotatable on two toothed wheels 4 and 5 journalled to a fixed frame 21. The chains I carry laterally outstanding fins 2. Each fin, as shown particularly in FIGURES 3, 4 and 5, is fixed to 'a small support 14 pivoted on a pin 15 carried by each chain 1.

As shown in FIGURE 4, the shape of the flanks of said small support 14 is such that the small support comes to rest on a second pin 15' in 'a manner so that it cannot rotate towards said pin, but can rotate in an opposite direction, against the action of a spring 16-.

The frames 21 are in oblique position with respect to the borders of the non-winding-up device, so that the chains 1 converge, from the group of drawing rollers 17 towards a funnel or condenser 18. For the upper portion of path of each chain-1 there is provided a fixed guide 3.

It should 'be noted that in the present example, the

bars 7 of the non-winding-up device are divided into spaced groups of three bars each.

As shown in FIGURE 2, the chains 6 with the bars 7 have a plane reach passing in a horizontal path and the chains 1 also follow a horizontal path, immediately under the bars 7.

At the beginning of the operation, the chains 6 and the bars 7 are moved by means of the drive wheel 9 actuated by a motor. At the same time, the chains 1 are moved by means of the thrust which the first bar 7 of a group of such bars exerts upon two fins 2 at the point indicated by C. At the beginning of the horizontal plane portion, at the point indicated by D, the fins 2 become interposed between the groups of three bars 7 and at the end of said portion the disengagement of the fins 2 from said bars takes place. During operation, the fins 2, pushed by the bars 7, proceed with their own speed, in the direction of the movement of said bars. The distance between the first bar 7 of a group in the first plane portion, and the first one of the following group, also understood to be in said first plane portion, is considerably greater than the distance between two adjacent fins 2 in the same plane portion.

When at the end of said horizontal plane path, towards the funnel 18, a fin 2 is disengaged from the bar 7 which was pushing it, the first bar 7 of the following group arrives in position to commence pushing the fin 2 subsequent to the one that has been lowered away from said horizontal path or reach.

At the beginning and at the end of the horizontal portion, the fins 2 can easily engage and disengage with and from the bars 7 because of their ability to rotate backwards, whereafter by action of the spring 16 they return to their rest position with respect to the chains 1. In said whole portion of the horizontal path or reach the fins 2 project sharply above the bars 7 as is shown clearly in FIGURE 2. The fibres coming from the rollers 17 and directed towards the funnel 18 find themselves in said portion of horizontal path between the two rows of fins 2 which converge as the said funnel is approached and because of the fact that the fins so converge and have, in the direction of forward movement of the bars 7, the same speed of the latter, a perfect union of the fibres is efiected so that a uniform roving arrives at the funnel 18.

The chains or belts of the device may be more than two: for instance for a first passage two are needed, for a second passage four are needed and so on.

One may arrange two superimposed non-winding-up devices without hindering the chains to be placed in the device for effecting the union of fibres.

I claim:

1. Apparatus to be interposed between drawing rollers and a condenser in a textile machine for facilitating the union and condensation of the fibres delivered by the drawing rollers to the condenser in roving comprising a first pair of spaced apart endless elements extending longitudinally between the rollers and the condenser, 'bars transversely extending between the elements and connected thereto and defining a plane reach between the rollers and the condenser, a second pair of spaced apart endless elements extending longitudinally between the rollers and the condenser and located within the area of the endless elements of the first pair, fins outstanding laterally from the endless elements of the second pair and disposed to be perpendicularly interposed between the bars at the beginning of the plane reach and upstand therefrom and disengage therefrom at the end of the plane reach, the endless elements of the second pair converging relative to each other in the direction of the condenser with the components of velocity of the bars and the fins in the direction of forward movement being equal.

2. Apparatus as claimed in claim 1, wherein the endless elements of the second pair are mounted on idler wheels with the fins being moved with their engagement with the bars and thereby rotating the endless elements of the second pair and means for positively driving the first pair of endless elements.

3. Apparatus as claimed in claim 1, including means for mounting the fins for backward pivotal movement with respect to the direction of forward movement of the endless elements and resilient means acting on the fins to resist such pivotal movement and normally retain the fins in a lateral position with respect to the endless elements.

References Cited in the file of this patent UNITED STATES PATENTS 2,293,712 Campbell Aug. 25, 1942 FOREIGN PATENTS 126,022 Switzerland June 1, 1928