US2242001A - Wound package and method of making the same - Google Patents

Description

May 13, 1941. F. J. KENT ETAL 2,242,001

WOUND PACKAGE AND METHOD OF MAKING THE SAME Filed Oct. 26, 1939 1 I I 7/ l/ 3 1 I i INVENTOR SJ: Frederic/n7. mi W '7 BY 7&07'21; h Jeefi ATTORNEY- Patented May 13, 1941 2,z42",oo1. I

WOUND PACKAGE AND METHOD OF MAKING THE SAME Frederick .1. Kent, Glen Rock, N. 1., and George H. Seelig, Lansdale, Pa: said Kent alsignor, by mesne assignments, to said George H. Seelig Application October :6, 1939, Serial No. 301,414

80hlms.

This'invention relates to the forming of yarn packages and particularly those of the kind in-' tended for over-end delivery and used, for instance, in knitting machines, The principal object is to produce a package containing the maximum length of yarn and from which, while the yarn delivery will be progressive and perfectly free, the yarn will not be susceptible of being pulled 03 at the point end of the package initially or at any stage in which it exists more adjoins the cone of the body portion, viewinE the mass in profile.

Since each layer wraps all the pro-existing layers with respect to the major portion of the length of each, sloughing-oif of the windings toward the point of the package in some segment appreciable in mass, as in handling the package, is prevented; only what is possible in or less depleted in mass-segments containing considerable lengths of yarn with consequent appreciable waste.

The improved package, given a core on which the windings are formed and which itself preferably has a quite sharp taper toward the point end of the package, embodies the following characteristics all essential to the accomplishment of the objects above stated: (1) Traverse during winding being resorted to, the disposition of the helices or layers of yarn is such that each of substantially all the layers, with respect to the major part of its length, wraps every other pro-existing layer for the major part of the length thereof. (2) The traverse being of the known kind in which the throw toward the point end of the package gradually increases'in speed and that toward the butt gradually decreases in speed (otherwise stated, so that in the completed package the winding pitch increases toward the point), the wound mass develops with what is herein termed its body portion having a desirable.

taper toward the point end and which preferably is but somewhat less sharp than that of the core. In order to build the butt and the point portion of the mass each with a certain taper, from time to time (as on the start of each point-directed traverse-throw) such start begins with a gain on the preceding layer. in the direction toward the point. (3) But it is important that the taper of the point portion of the mass should be appreciably more acute than that of the butt (which would not be the case if, the layers being all of the same length, each extended beyond the pre-' ceding layer toward the point only as much as its gain). wherefore whatever the said gain may be each layer subject to such gain is given an added increment of length so that it reaches beyond the preceding layer for an extent more than such gain; incidentally, in practice, this results not only in the point portion having a sharper taper than the butt but in some desirable rounding of the angle that would otherwise exist at the plane where the base of the cone of the point portion handling is' detachment of a few of the thus substantially completely wrapping layers at a time, wherefore by the improved package there is obviously a great saving of yarn which becomes wasted by handling in the case of the ordinary package. The taper of the body portion facilitates, of course, the drawing oil of the yarn by the machine which the package serves, but being slight it offers a certain degree of resistance to, displacement of the outer convolutions of the layers toward the point of the package, as in handling. The point portion of the wound mass, by having less acuteness than the body portion afiords freedom to the yarn as, in being pulled ofl by the machine, it plays around the axis of the package, the mentioned rounding augmenting this eifect.

As for the obtuse butt: Preferably the winding is so performed that from time to time, as following the laying on of a number of layers, what we herein term a loss" is effected. That is to say, instead of the layer next to be started toward the point being started at a point forward of the starting point of the next-preceding layer it is started at a point set backward of the starting point of such next-preceding layer. This may be continued with respect to a number of layers and it may result in the initial convolution of any layer, more orless thereof, winding on the butt-cone at a less diameter than the other convolutions of that layer, wherefore there is a binding by that convolution of the end convolutions of some of the preceding layers; and thus the butt is made resistant to its convolutions sloughing off.

Another object of the invention is thus indicated:

It is known that in winding with a traverse there develop bandings of the convolutions of 2 plained, the traverse-throw toward the point increases and that toward the butt decreases in speed, during one stage of the winding each such traverse-throw will attain its limit more quickly than any traverse-throw occurring during a preceding stage. Otherwise stated, whereas one series of layers will be wound with the pitch thereof, considered, say, in the direction toward the point of the package, increasing at a given rate, the succeeding series will be wound with the pitch thereof, similarly considered, increasing at a diflferent rate. Thereby there will be av desirable scattering of the convolutions and hence a material elimination of the bandings.

In the drawing- Fig. 1 shows the improved package in vation, partly in section;

Fig. 2 is a diagram showing that, for example,

side eleeach layer has an added increment of length greater than its gain;

Fig. 3 shows the core in fragmentary longitudinal section, and diagrammatically, the loss occasionally effected at the butt end of the mass, the whole being enlarged; and

Figs. 4 and 5 are diagrams showing layers whose helical pitches increase at different rates toward the point of the package.

The core is designated i. The winding of the yarn 2 forming the yarn mass thereon, as a whole designated 3, is performed after the manner, generally, shown for instance in the patent to Altemus, No. 1,214,741, and see either Fig. 4 or Fig. 5

I of the drawing herewith, that is to say:

Traverse being resorted to while the yarn 2 undergoes wrapping around the core, the traverse-throw toward the package point (the righthand em; in Figs. 1, 4 and 5) gradually increases and that toward the butt gradually reduces in speed, whereby, as disclosed in said patent, the winding pitch of any helix or layer formed will gradually increase toward the package point with the resulting tendency to develop the mass with an exterior taper which is directed toward such point; and from time to time, as after each butt-directed traverse-throw, the start of a layer toward the point being somewhat-nearer to the point than the next preceding layer, or with what is known as a gain" (such as is shown by Fig. 2 where 4 designates successive layers, and

the substantially uniformly spaced lines a designate their pomts of starting toward the package point), the butt 3a is formed tapering, but preferably rather obtuse.

Further, the length of each layer is so much greater than the length of the truncated cone formed by the butt that the major portion of the length of any one layer wraps the major portion of the length of any preceding layer. Between the lines :r::: in Fig. 1 is what we term the body portion of the wound mass; in this example the core has a slight taper, but in any event the development of the wound mass is such that; viewed in longitudinal section, there results convergence of its inner and outer surfaces, and hence a taper, toward the point of the package.

But according to the inventiomas already explained, the exterior taper of the point portion (i. e., between the lines :c--a: in Fig. 1) should be appreciably more acute than that of the butt. Therefore, as shown at the right in Fig. 2, whatever gain any layer has it has an added increment of length over such gain, or here as much again as such gain as shown by the lines-b in said figure, which are twice aswidely spaced as the lines a. The result is. that the said point portion of the mass will have the desirably sharper taper than the butt; and in actual practice this develops with an exterior rounding at a plane perpendicular to the axis of the package and which coincides with the right-hand point a: in Fig. 1, being the plane where the taper of the body portion and that of the point portion would otherwise merge in an angle, viewing the package in profile.

Imagining the package to be divided into any layer sets. say those between the lines I in Fig. 1,

the construction is such that each such layer set, and hence each of its constituent layers, wraps the preceding one from the butt to the point of the package, their form approaching closer to that of a cylinder than to that of a cone lacking appreciable acuteness. Therefore no portion of the wound mass is susceptible of axial displacement independently as a segment of appreciable mass, with consequent destruction of the package and considerable waste of yarn.

To, prevent sloughing-ofl of coils existing at the butt of the package, the development of the wound mass 3 may be efl'ected with occasional loss already mentioned as resulting from occasionally stepping back the pc'nts 01' starting the traverse-throws toward the package point. Thus, in Fig. 3, after the winding has proceeded for a while, with gains'as already described and shown by Fig. 2 and indicated in Fig. 3 as progressing in coincidence with "line 6. the starting points of the point-directed traverse-throws are stepped successively buttwise or back, such stepping-back progressing, however, only to such extent, as indicated by line I, as will conduce to the butt having the mentioned general taper; that is to say, so that the butt-adjacent end of any stratum or group of layers (existing between any two lines 8) shall be short of the corresponding end of the preceding stratum, or have a gain with respect thereto. Having thus efiected one general gain 8 and a general loss to line I, these may be repeated in alternation until the winding is completed. The tendency, at least, is to develop the butt with concentric corrugations, but in fact some if not many of the butt-adjacent,convolutions, due to the taper of the butt, undergo change from what would otherwise be the diameters of the other convolutions in their respective layers to smaller diameter, wherefore they bind butt-adjacent convolutions of preceding, layers more or less and so the stability of the butt is increased. The aggregate gain, as indicated by line 1, is greater than the aggregate of the peri- ,odic losses.

In Figs. 4 and 5 yarn helices or layers of the Y yarn 2 are shown having their pitches increasing 7 the number of traverse strokes to the number of turns per given time-period, as by changing the number of either per time-period while preserving the number of the other unchanged. By a turn we mean one complete wrap of the yarn about the core, or in the examplethe efiect of revolving the core one complete revolution while yarn is fed thereto.

- we claim is: 1. The hereindescrlbed yarn package including Having thus fully described our invention, what a core and a yarn 'mass consisting of yarn tra- --verse-wound .in-iayers on the core, twolayers of such massh'avi'ng' windingpitches which -gradually increase in the same axial direction but one having a winding pitch which increases in said direction at a different rate from that at which the winding pitch of the other layer increases, and the relatively outer layer being the longer.

2. The hereindescribed yarn package including a core and a yarn mass consisting of yarn traverse-Wound in layers on the core, layers of such mass all having winding pitche which gradually increase in the same axial direction but alternate ones of such layers having a Winding pitch which increases in said direction at a different rate from that in which the winding pitch of the other such layers increases, and such'layers increasing in length from the core outward.

3. A yarn package including a core and a yarn mass including yarn helically wound on the core in layers having their winding-pitch increasing toward the point of the package and each of substantially all of the layers having the major portion of its length wrapping the major portion of the length of every preceding layer, each of substantially all of the layers having a gain and also an added increment of length greater than its said gain.

4. A yarn package including a core and a yarn mass including yarn helically wound on the core in layers each having their winding-pitch increasing toward the point of the package and each of substantially all the layers having the major portion of its length wrapping the major portion of the length of every preceding layer, each of substantially all the layers being also extended toward said point further than the next preceding layer, the body portion of the mass being exteriorly tapered toward the point of the package.

5. The method of forming a wound yarn mass which consists in winding yarn around a core in layers while eflecting traverse as between the core and the yarn, one of them relatively to the other axially of the core, at a traverse speed which increases in one direction and decreases in the other traverse direction, and during the winding starting successive traverse-throws in the first-named direction each with a gain and ending each such traverse-throw beyond the preceding traverse-throw a distance greater than its own gain.

6. The method of forming a'wound mass which consists in winding yarn on a. core in layers While efiecting traverse as between the core and the yarn, one of them relatively to the other axially of the core, and during the winding of a stratum of the layers .starting successive traverse-throws in one traverse direction each with a gain and during the winding of the next succeeding stratum of the layers starting successive traverse-throws in said direction each with a loss and so that the second-named stratum shall exist with a gain relatively to the first stratum.

7. The method of forming a wound package which consists in winding yarn on a core in layers while effecting traverse as between the core and the yarn, one of them relatively to the other axially of the core, and in alternate periods during the winding starting successive traversethrows in one traverse direction each with a gain and in the remaining periods starting successive traverse-throws in said direction each with a loss while preserving the aggregate gain greater than the aggregate of the periodic losses.

8. The method of forming a wound package which consists in wrapping yarn around the core while efiecting traverse as between the core and the yarn, one of them relatively to the other axially of the core at a traverse speed which increases in one.traverse direction and decreases in the other, and meanwhile, while occasionally changing the ratio of the number of traverse strokes to the number of turns of the yarn per given time-period, increasing the traverse-stroke length.

FREDERICK J. KENT. GEORGE H. SEELIG.

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