US3184529A

US3184529A - Process for the continuous processing of synthetic yarns

Info

Publication number: US3184529A
Application number: US151769A
Authority: US
Inventors: Diotti Giacinto
Original assignee: Studi E Brevetti Applicazioni Tessili
Current assignee: Studi E Brevetti Applicazioni Tessili
Priority date: 1960-11-12
Filing date: 1961-11-13
Publication date: 1965-05-18
Anticipated expiration: 1982-05-18
Also published as: ES272442A1; CH371859A; DK106193C; NL271222A; GB1007154A

Description

May 18, 1965 morn I 3,184,529

PROCESS FOR THE CONTINUOUS PROCESSING OF SYNTHETIC YARNS Filed Nov. 13. 1961 3 Sheets-Sheet 1 ,1? fforhe s May 18, 1965 G. DIOTTI 3,184,529

PROCESS FOR THE CONTINUOUS PROCESSING OF SYNTHETIC YARNS Filed Nov. 13. 1961 3 Sheets-Sheet 2 Q 12b 13 11 "a INVENTOR.

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May 18, 1965 G. mom 3,

PROCESS FOR THE CONTINUOUS PROCESSING OF SYNTHETIC YARNS Filed Nov. 13. 1961 u SiLSA 3 Sheets-Sheet 5 INVEN @vbcinTb 171 0? 1' United States Patent Office aisaszs Patented May 18, 1965 3,184,529 PROCESS FOR THE CONTINUGUS PROCESSHIG GF SYNTHETIC YARNS Giacinto Diotti, Milan, Italy, assignor to Studi e Brevetti Applicazioni Tessili, Milan, Italy, a limited-liability company of Italy Filed Nov. 13, 1961, Set. No. l51,769 Claims priority, application Italy, Nov. 12, N60, 19,491/60 4 Claims. (Cl. 264--34tl) It is generally known that when spinning synthetic yarns and, in particular, viscose rayon yarns, using continuous processes, it is very highly desirable that one be able to simultaneously process a plurality of threads using the same device. The word thread here means the group of filaments originating in a single spinnerette or nozzle.

Synthetic yarns, in particular, viscose rayon, must be subjected to a set of wet processes which are carried out in collection and feed devices which can have different structures depending on the case. For .a long time it had been impossible to spin continuously and simultaneously on the same device a plurality of threads because the d-iiferent threads came to stick to one another, especially because during part of the process they were in a semi-plastic or plastic state.

According to the prior Patent No. 2,883,259, the problem of the continuous spinning of a plurality of threads on the same device is solved by causing such threads to travel through an essentially helical path (the word helical in this context is not to be taken as having its geometrical definition and is intended as approximate), so arranged that, taking the vaircus threads in succession, the path described by each thread is enclosed within and partially tangent to or touching upon the path of the following thread. This process is achieved by means of a device which comprises a main processing roller, divided up among various processing areas and a plurality of feed rollers of lesser diameter, suitably arranged at different distances from the main roller, having smaller diameters than the latter and being inclined at an angle in respect to it. Thanks to the in vention embodied in the above named patent the spinning of a plurality of threads simultaneously and continuously, generally in the same number of threads as there are rollers, can be done without dificulty and the various threads do not adhere to one another but, instead, remain completely separate from one another, even if they do touch one another during part of their travel.

This invention has as its object a further improvement in said continuous spinning process. It has been found that the spinning can be further improved by causing a plurality of threads to travel through a helical path such that the successive turns of each thread will be maintained at a distance apart from one another, even if the turns of different threads are allowed to touch one another and, in fact, they may very well touch during part of their travel.

In a device having the general structure of the device described in the patent mentioned above and thus comprising a main roller and a plurality of feed rollers, the spacing between the successive turns of each thread is achieved by giving the device a plurality of thread guides and by placing said thread guides in such a spatial relationship to the path through which the threads travel that one and one only turn of each thread and, in general, all the threads being processed, will pass through each interspace between any two adjacent thread guides. The number of turns passing through each interspace could be further reduced but by doing so would lead to :a useless multiplication of the number of thread guides.

Further characteristics and advantages of this invention will become apparent from the description which follows herein, with reference to the accompanying drawings, wherein:

'FIG. 1 is a device embodying the invention, shown in perspective, only a few of the turns of the various threads being shown;

FIG. 2 shows the same device seen from above;

FIG. 3 shows the same device along a section taken perpendicular to the axis of the main roller;

FIG. 4 shows an enlarged detail taken from FIG. 3;

FIGS. 5a and 5b are transverse sections of the thread guide group in two positions.

In the drawings the main roller or processing roller is indicated by it). The feed rollers are shown at 11a and 11b. Naturally, all the rollers are mounted on a frame which is neither described nor shown.

The threads are designated by 12, accompanied, where necessary, by the small letter corresponding to the feed roller on which the particular thread rests.

13 designates, in general, a first set of thread guides which are arranged at the ends of the various processing areas. Thread guides of this type are alsoto be found in spinning machines of types already known and are used to allow the threads to pass over the separating flanges dealt with further on.

The processing areas of the main roller are indicated by the numbers 15 to 21, inclusive, and the adjacent areas are separated from one another by sets of flanges each set being indicated by a number from 22 to 27, inclusive. A single flange is to be found at the beginning of the processing roller, designated by the number 28. The processing fluids are fed to the roller in a manner already known, by way of lines 29, of which only one is shown diagrammatically in FIG. 3.

The number 30 indicates, generally, the thread guides which are used to separate the successive turns of each thread from one another.

As can be seen from the drawings, said thread guides are divided up among various groups, each corresponding to a single processing area, while the thread guides 13 serve as guides in a way which is rendered particularly obvious by FIG. 2, for the passage of the various threads from one processing area to another, passing above the separating flanges. This spinning machine is, of course, rendered complete by a reservoir to hold the various fluids, divided by partitions which penetrate into the interspaces between the flanges of each set from 21 to 27, inelusive.

According to this invention, the paths through which the threads travel are thus determined in relation to thread guides 39, in such a way that one turn of each

thread

12a, 12b, will pass through the interspace between the two successive thread guides 30 and that a thread guide 30 will be located between each set of turns and the set which follows of the same thread. This can be seen particularly well by comparing FIGS. 1 and 2. In FIG. 1 only a few turns of thread have been shown. It will be seen how the corresponding turns of the various threads, which in this particular case are two in number, but which, naturally, in other cases could be of even a considerable number, are practically in contact with one another, to such an extent that in FIG. 1 they are shown by a single line and that they separate from one another on passing to their respective feed rollers as is clearly shown in FIG. 1, remaining almost on the same vertical plane as shown by FIG. 2, excepting where the threads pass from one processing area to the next. In the same way, it is very clearly shown in FIG. 2 how the adjacent turns of each thread are separated, passing through the various interspaces created by the group of thread guides 30, which, taken all together, go to make up what We will call the comb 31.

In one preferred embodiment of the invention, means are provided to enable the thread guides to take up the desired position between the turns of the thread after the turns have already formed. To this end comb 31 is constituted as shown in FIGS. 5a and 511. Thread guides 13 are mounted on a longitudinal stem 32 and each is held by an arc-shaped piece 33. Thread guides 30 (only two of whichare shown in FIG. 5) are mounted on (or incorporated in) a plate 34, fixed to a hollow cylinder 35,

having a slot 36 and another 37, said cylinder being so assembled that it can turn above stem 32. The unit as a whole is as shown in FIG. 5:1 for assembly and as can be seen, the cylinder 35 can first be slipped on over the stem.

32 and then the thread guides 13 can be assembled through the

slots

36 and 37 and mounted using washers 38 on pieces 33.

, The rotation of the cylinder 35 on stem 32 is controlled manually by means of knobs 39 which are shown in FIGS. 1 and '2. Tostart up the spinning machine the thread guides 30 are made to turn downwardsand they are brought to the position shown in FIG. 5b, which is made possible by the presence of slot 36, which can thus slide in respect to the thread guides 13. Once the spinningmachine has been started up, when the threads are arranged in turns with a pitch between turns determined by the distance between the feed rollers and the processing roller, by the angle of inclination of said rollers and by the ratios 4 invention, itself, covers any and all variants or modifications such as may be made by a person expert in-the art.

What I claim is:

l. A process for the continuous processing of yarns, comprising looping a plurality of individual strands of yarn along essentially helical paths including a predetermined number of loops of each strand about a common cylindrical main surface, looping each individual strand about a separate individual cylindrical auxiliary surface associated with said cylindrical main surface, the several auxiliary surfaces each being 'at a different location in respect to said main surface causing all of said strands to progress continuously in their looped individual config urations, continuously applying treatments thereto while they are so progressing, causing said plurality of individual strands of yarn to guidedly loopabout said common main surface in loops through guide passages including a pre determined number of guide passages, all said individual strands being in groups wherein the grouped strands are in mutual contacting relationship in each one of said guide passages.

2. A process as set forth in claim 1 wherein each in dividual strand of yarn contacts other strands in said plurality in individual loop portions about said main surface between the diameters of the rollers, cylindrical support is to turn in a counterclockwise direction using the knobs 39 and the thread guides 30 return to the position shown in FIG. 5a, in which position they engage with the threads in the manner shown in FIGS. 1 and 2. Naturally, the interval between the various thread guides is determined in such a way as will correspond to the pitch between turns of the threads.

As can be seen from the drawings, it is preferable that the thread guides be tapered in such a way as will aid the threads to enter the interspaces between thern.

FIG. 4, in this respect, shows the relationship between the two positions of the thread guide 30 and that of the threads, the inactive position of the thread guides being that shown in dotted or broken lines.

This invention has been described above in reference to one particular embodiment thereof, to be treated as a nonrestrictive example for purposes of illustration, while the and is guidedly spaced from its corresponding adjacent loopportions along the said individual path thereof.

33. A process as set forth in claim' 1, wherein said grouped plurality of strands is progressed through an individual guide passage at a location adjacent to said main surface, at any individual loop included in said essentially helical paths.

4. A process as set forth in claim 1 wherein said strands of yarns consist of viscose rayon. 7

References Cited by the Examiner UNITED STATES PATENTS 2,535,426 12/50 Keight '1s s 2,883,259 4/59 -Severini 8'151.1

FOREIGN PATENTS 583,990 1/47 GreatBritain.

ALEXANDER H. BRODMERKEL, Primary Examiner.

WILLIAM J. STEPHENSON, MORRIS LIEBMAN,

Examiners.

Claims

1. A PROCESS FOR THE CONTINUOUS PROCESSING OF YARNS, COMPRISING LOOPING A PLURALITY OF INDIVIDUAL STRANDS OF YARN ALONG ESSENTIALLY HELICAL PATHS INCLUDING A PREDETERMINED NUMBER OF LOOPS OF EACH STRAND ABOUT A COMMON CYLINDRICAL MAIN SURFACE, LOOPING EACH INDIVIDUAL STRAND ABOUT A SEPARATE INDIVIDUAL CYLINDRICAL AUXILIARY SURFACE ASSOCIATED WITH SAID CYLINDRICAL MAIN SURFACE, THE SEVERAL AUXILIARY SURFACES EACH BEING AT A DIFFERENT LOCATION IN RESPECT TO SAID MAIN SURFACE CAUSING ALL OF SAID STRANDS TO PROGRESS CONTINUOUSLY IN THEIR LOOPED INDIVIDUAL CONFIGURATIONS, CONTINUSOULY APPLYING TREATMENTS THERETO WHILE THEY ARE SO PROGRESSING, CAUSING SAID PLURALITY OF INDIVIUAL STRANDS OF YARN TO GUIDEDLY LOOP ABOUT SAID COMMON MAIN SURFACE IN LOOPS THROUGH GUIDE PASSAGES INCLUDING A PREDETERMINED NUMBER OF GUIDE PASSAGES, ALL SAID INDIVIDUAL