Патент USA US2123970код для вставки
July 19,, 1938. _ M. A. SALEMBIER, JR ' 2,123,970 METHOD OF THROWING SILK Filed May 13, 1935 kg [19 ' 24 A, INVENTO 12,123,970 Patented July 19, I938 - UNITED STATES PATENT‘ OFFICE 2,123,970 METHOD OF THROWING SILK Maurice Albert Salembier, Jr., Plandome, N. Y. Application May 13, 1935, Serial No. 21,079 6 Claims. This invention relates to a new and improved method of silk throwing and more particularly to an improved method of producing a continuous multiple strand silk thread. The art of silk throwing includes the steps of winding, doubling, twisting and usually, coning, to form a suitable silk thread from raw skein (01. 117-21) unknotted strands, and transferring a‘single bob-v bin of twisted and doubled thread to ?ll a single. ?nal package. ' . Further objects and advantages of my inven tion will appear from’the following description thereof, taken in conjunction with the attached drawing which is a diagrammatic elevational view of certain parts of a throwing machine on _ silk. Of these operations, certain ones, par ticularly doubling, have been the source of mul- _ which my new process may be carried out. One of the principal sources of knots common 10 strand knots which are highly objectionable 10 tiple not only in waste of material and delay in throw ing, but they are especially objectionable in the ?nal product and its uses. It is the principal object of my invention to 15 provide an improved method of throwing silk yarn by which I produce continuous lengths of silk yarn of multiple strand type having 110 knots common to¢all strands, my method includ 7 ing the step of tying single strand knots in case 20 of breaks or runouts in the separate strands. Another object of my invention is to provide an improved method of throwing silk which in cludes the steps of stopping multiple strand thread in the doubling machine prior to the 25 point of doubling or twisting, in case of a single strand break, and tying the single strand to its appropriate supply without destroying the con tinuity of, the other strands. Another object of my invention is to provide an 30 improved method of throwing silk to form a mul tiple strand thread by winding multiple'strands from a plurality of separate strand bobbins which includes the step of stopping the thread between the creel and point of twist if a strand breaks, 35 tying a single end knot in the broken strand without drawing the completed thread back off the receiving bobbin and subsequently uniformly tensioning and twisting the knotted and un knotted strands. A still further object of my invention is to 40 provide an improved method of throwing natural silk to form a continuous multiple strand, mul tiple twist thread having uniform texture and no knots common to all strands in packages of 45 the order of six ounces or larger which comprises the steps of winding single strand bobbins having a length approximately equal to the length of the single strands in the ?nal package, feeding mul tiple strands from a plurality of such bobbins to 50 a single receiving bobbin to form a. doubled thread, stopping said feed, if a single strand breaks, before the broken strand reaches a point of doubling or twisting, tying a single strand knot in the broken strand and the ‘single-strand from 55 the winding bobbin, twisting the knotted and to all strands in a multiple strand thread is in the step of doubling or forming the multiple strand thread having two or more strands from a plu rality of the single strands. Doubling is not limited to two strand thread but is used in its commercial sense of forming multiple strand thread of any desired number of strands. This operation is commonly performed on a combined doubler-twister type of machine which forms and winds the multiple strands and at the same time gives the multiple strands a certain predetery mined twist. Such machines are especially suit able for throwing silk yarn for hosiery tram as such product is a multiple strand thread com‘ monly having relatively few turns per lineal inch. Such machines are also frequently used in the preliminary steps of forming other threads such as crepes, etc., which although of a higher twist, are initially formed into multiple strands on the doubler-twister type of machine and subsequently 0 given a ?nal twist on a twister. I have diagrammatically shown parts of a doubler-twister type of machine to better illus trate the steps of my improved process of throw ing silk yarn, although I am not limited to such machines as my process can be carried out on any type machine adapted to form multiple strand thread. In general such machines have a creel or pin rail I0 which is provided with a number of pins H to support the desired numberaof single strand bobbins l2. It is, of course, to be under stood that different types .of thread require a different number of strands, hosiery tram, for example, varying from two to twelve or more depending on whether used for sheer or service weight hosiery, and for leg or welt or foot por tions. Considering as a special example, throwing of a four strand, low twist thread, four single end yarn bobbins I2 are placed on the respective pins 50 4 l and the separate ends a, b, c and d are drawn through the eyes .of the individual drop arms l4, and then the separate strands are gathered by the gathering eye l6. The single thread then usually passes around certain feed rolls l8 or 55 2 "2,123,970 other tensioning devices, through guide eye l9 -may be accomplished by various different forms 10 and then to the receiver bobbin 2!], through the’ guide ‘eye 22 on the traverse or ring rail 24. As is well known, the receiving bobbin 20 is rotated at a desired speed to properly wind the in case of a broken strand, the receiving bobbin and feed rolls stop before the point of break in the strand becomes twisted in other portions doubled multiple strand thread and the feed rolls of the thread. I8 which are driven at a predetermined speed relative to that at which the receiver bobbins are As a second step in my improved method of throwing silk, I then tie a knot such as 28 in operated act as take up rolls or tension devices. the broken strand only, so that the llmot is ad jacent continuous portions of the unbroken The, feed rolls I8vin this type of machine deter mine the amount. of tension on the doubled thread and the relative rate of rotation of the feed rolls I8 and the receiver bobbin 20 deter mines the number of twists the thread is given per inch. ' - I do not show in detail'the operation of the stop mechanism, but it will be understood that a suitable stop mechanism is placed in operation to stop the feed rolls I8 and the receiving bobbin 20 20 by the dropping of a drop arm I4 due to run—» of machinery, it being essential, however, that - 1 strands and is therefore relatively small in com parison with a knot common to all strands. In the subsequent twist generally given the thread the single strand knot blends in and becomes al most totally invisible. I ?nd that the single strand knots will pass practically all knot de tectors, carriers or needles which will pass the ‘majority of the unknotted thread. Inasmuch as I stop the thread prior to ‘the point at which the broken ‘strand becomes twisted with the unbroken strands, it is unnecessary to out or exhaustion of the supply on a bobbin I2, or due to waste or other matter catching in the . draw any wound thread back from the receiv eyes of the drop arm I4 which breaks a strand. ing bobbin to count ends as formerly required, It will be clear that a break or run-outin the and it is unnecessary to make any visual inspec strand will occur between the bobbins on the tion other than merely to join the portions-of creel or pin rail I0 and the eye of the drop arms the broken strand. A break in one strand will I4. As illustrative of the operation of my de be instantly noticeable and with the other strands vice, I have shown one of the strands a of the continuous, the mere tying of the broken strand thread broken and the appropriate drop arm in will in itself be an inspection to show that all 30 stopping position, ends are present in the'thread. 30 It is necessary in. forming multiple strand After the knot is tied in the broken strand, thread to. always have the same number of the spindle is restarted and as the knot is be strands in the thread at every point as less than tween the single strand bobbins l2 and the feed the full number of strands would cause a re rolls I8 the tensioning of the knotted and un jection of the yarn as totally defective. A lesser knotted strands will be uniform. Uniform ten number of strands was frequently partially wound on the receiving bobbin however as the thread passes so rapidly (receiving bobbins frequently run 4500 revolutions per minute) that even if the 40 drop eyes operated the usual vstop mechanism, it would still not prevent some of the lesser num ber of strands from passing through the guide eyes and on into the receiving bobbin. It has sioning improves the elasticity of the thread which is'of major importance in many products such as hosiery which require a high elasticity characteristic. As a further step in my improved process. I ?ll each receiving bobbin 20‘ with an amount of continuous doubled thread sufficient to complete ly ?ll the ?nal package whether it be a cone been the practice of throwsters to sever all the - or of other type. Coning from bobbins having 45 unbroken strands when one strand ‘broke, the full equivalent amounts of yarn saves a substan 45 operators either breaking all the other strands tial amount of time and eliminates the vusual by hand, or automatically operated means con knots and variable tension in the coning of three nected to the stop motion mechanism were pro ounce and larger packages. 'I'he'v elimination of vided to accomplish this result. Some of the 50 wound thread was then drawn back from the receiving bobbin until the operator found the desired number ‘of thread strands after which a knot common to all strands was tied, the knot . trimmed, and the trimmings and slack discarded 55 to waste. The thread drawn back from the bobbin and trimming of the knots'was a source of considerable waste, and the knot was highly objectionable. In accordance'with my improved method of 60 throwing silk and in operating the machinery used for forming silk thread, I ?nd that I can eliminate a substantial amount of waste here tofore occasioned in tying multiple strand knots and avoid the delay due to drawing of thread 65 back from the receiving bobbin. I also provide a superior product which has no knots common to all strands and which is therefore a far superior product to that heretofore produced. As one step of my improved method of throwing silk, I 70 stop and incomplete thread between the creel and the point of twist so that I can tie a single strand knots is also very important in coning because it often happens that different bobbins will have slightly different types of thread as hereinafter described and. I entirely avoid such difficulties. Although I am not so limited, I also find it highly desirable‘ to use single end bobbins hav ing a‘ continuous single strand equal in length to the single strands of the desired ?nal pack 55 age. By this I mean that I provide a single end bobbin which will not run out in forming the de sired receiving bobbin. 20 of the double thread. I also use bobbins in the other machines includ ing twisters, etc., which will hold the entire sup ply for the ?nished package. Although this has been practiced to some extent in making smaller packages of silk, it has been customary in making packages of three ounces and over and especially, the eight ounce package to use the customary small bobbins which required joining different lots of thread. I avoid this entirely by forming a continuous strand of twenty thousand yards or more in which some thread strands are continu ous at every point. , knot without untwisting or drawing the thread. Tying of single strand knots makes it unnec back from the bobbin. As shown in the drawing, essary to carry out the usual redraw operation . this region of separated strands is generally indi which was commonly required for inspection, 75 cated at 25. Stopping the thread in this space cleaning and elimination of hidden knots. In 60 3 2,123,970 from different bobbins is entirely eliminated. I addition, spool for spool transfers of large pack age quantities from doubler-twister to twisting machines and from the twisting machinesto the coning machine is especially bene?cial with high twist threads such as crepe, inasmuch as there can be no slack twist which formerly required the loss of several yards of material at each knot. With single strand knots the twist is continuous and redrawing being eliminated there is a much higher percentage of thread available for coming or other packaging. Ordinarily there is no other knot or break at the same point, although it is to be understood that single end bobbins usually carry yarn which also avoid hidden knots in the coning operation and .prevent unravelling or catching of thread bunches due to knots accidentally occurring on the side of the cone which commonly causes con siderable di?iculty in the using machine during knitting, weaving, etc. I have referred to my method of throwing as re lating to silk and I mean by that, natural silk which is well known to be a relatively small size ?ber al 10 though varying in denier, such silk being elastic, relatively strong and commonly formed into amul tiple strand thread to form a suitable product. There are other ?bers, however, such as arti?cial silk, to which my invention is applicable where 15 is possible that a winding knot, for example, may such ?bers have similar characteristics of elas occur at a point adjacent a new break during I ticity, strength, sizeand necessity of doubling. While I have described a preferred form of the doubling operation. While I prefer not to‘ tie other than single thread knots, I find that if embodiment of my invention, I am aware that 20 has been knotted in one or more places, and it 20 not more than two-thirds of the strands of four strand thread or greater are tied together at‘any ' one point, this may not be objectionable from the standpoint of future use of the double thread. In a four strand thread, for example, I have 25 tied a knot common to two strands and in a ?ve strand thread, I have tied a knot common to as many as three strands without objection. Tying more than this frequently causes subsequent di?i culty and is to be avoided. 30 . I ?nd that my improved method of silk throw ing saves a very substantial amount of the total throwing costs, reduces labor and machine costs and brings about a very substantial saving in waste. Inasmuch as I tie a knot in a single strand‘only, there is a saving of at least three fourths that heretofore 10st in tying knots com mon to all strands in a four strand thread and there are other savings in time and material by not drawing thread back from the receiving bob 40 bin. The gross saving in waste alone can be re duced more than one-half by my method. of tying knots which represents a very substantial ad' vantage. ' . ' A multiple strand thread having no knots com mon to all strands is a premium product and highly desired by the using trade. For hosiery tram, it is particularly satisfactory in that as there are no knots common to all strands, press o?s due to the knots catching in the needle or carrier or untying are eliminated, and the ?nal. product _has none of the knots which were for other modi?cations may be made thereto and I therefore desire a broad interpretation of my in vention within the scope and spirit of the de scription herein and of the claims appended hereinafter. I claim: » — 25 l. The method of producing a natural silk yar having a continuous length of at least twenty thousand yards which comprises the step of wind ing a continuous length of a single strand of at least twenty thousand yards, subsequently form 30 ing multiple strands on a spool adapted to con tain twenty thousand yards of the multiple strand thread, and tying single strand knots atv single strand breaks prior to the formation of the mul . tiple strand thread. 2. The method of producing a continuous twist ed multiple strand thread having a length of at least twenty thousand yards, of smooth texture and having no knots common to all strands which comprises winding a-plurality of single strands 40 of at'least twenty thousand yards, doubling said strands, tying breaks in single strands independ ‘ ently of other strands, twisting the tied and con tinuous strands, winding a single bobbin with a continuous thread of the desired length, subse 45 quently setting the twist in said thread and ?nally making a complete spool for spool transfer of said thread to form a final package. 3. The method of making a continuous multi ple strand natural silk organzine yarn of a 50 length equivalent to an. eight ounce mass and merly so conspicuous as to cause, rejects and having in the range of two to twelve strands of reclassi?cation. My larger ‘package product ' ten to twenty denier which includes the simul available by my improved'method of throwing is taneous doubling and twisting of a plurality of also especially suitable for hosiery tram as an silk strands into a single yarn on a doubler eight ounce package will make approximately one dozen ‘pairs of hosiery leg portions, depending on the denier and strands of the thread and with twister machine, tying single strand knots in a no common knots, I can eliminate the losses due 60 to the three or four knots which formerly existed in this size package. ‘ Furthermore, having no knots common to all strands there is no opportunity of joining mis mated threads. As is well known, threads of the same denier size classi?cation are not uni form in diameter and the variation is such that in certain woven cloths as well as in some knitted products the change ‘in tint, diameter and na ture maybe very conspicuous ‘and highly objec tionable. This is especially noticeable during subsequent dyeing. There is no point in, my thread at which there is less than one contin uous strand and preferably only one strand is knotted at any one point so that any di?iculty due to the possible variation in joining threads 55 broken strand in case of a break or run-out, uniformly tensioning the broken and unbroken strands, subsequently uniformly ,twisting the multiple strand yarn from end to end after the single. strand‘knots have been tied and ?nally setting the twist of the yarn. 4. The method of producing a natural silk ‘yarn having a continuous length of at ‘least twenty thousand yards which comprises the step of winding a plurality of continuous lengths of single strands of at least twenty thousand yards, subsequently doubling and twisting said single strands and winding said strands on a spool adapted to contain twenty thousand yards of the 70 multiple strand thread, tying single strand knots during the doubling-twistingoperation at single strand breaks, and subsequently making com plete spool for spool transfer of the yarn in further throwing steps. 75 4 V 2,123,970 5. The method of making multiple strand yarn to a package containing the entire spool of natural silk yarn equivalent in length to a weight twisted yarn. of six or more ounces, which comprises winding a 6. The method of throwing natural silk which comprises feeding from each of a plurality of single end bobbins, a single strand equal in plurality of continuous lengths of single strands of natural silk equivalent to the length of strands in the ?nally desired ‘package, subsequently length to the strand of the ?nal package, tying doubling and twisting said single strands on a single strand knots at a break or run-out to doubler-twister machine, tying single strand > maintain the continuity and independence of the knots in said separate strands in case of a break. strand, twisting the knotted and unknotted 10 or run-out, winding said multiple strand yarn on strands under uniform tension, winding the a single spool adapted to contain all of the yarn twisted and doubled thread on a receiving bobbin of the ?nal package, transferring said yarn com and subsequently forming a full package from pletely from one spool to another in a twisting thesingle receiving bobbin in spool for spool machine and twisting said yarn during the trans and subsequently packaging said twisted yarn by completely transferring the twisted transfer. . 15 fer MAURICE A. SALEMIBIER, JR.