US2643830A - Package adapter - Google Patents

Description

June 30, 1953 E. w. PAEPLOW ETAI, 2,643,330

PACKAGE ADAPTER Filed June 7; 1949 2 Sheets-Sheet l' FIGI. 27

INVENTORS EARL WILL/AM PAEPLOW and MESSOUD KIACHIF BY W ATTORNEY Patented June 30, 1953 UNITED STATES TENT OFFICE 2,643,830 PACKAGE ADAPTER Earl William Paeplow, Chester, and Messoud Kiachif, Richmond, Va., assignors to E. I. du Pont de Nemours & Company, Wilmington, Del., a. corporation of Delaware Application June 7, 1949, Serial No. 97,527

1 Claim. (01. 242=--124) spindle adapter for a cylindrical tube of yarn I which is to be twisted into crepe yarn.

In U. S. 2,119,963 to Ramsdell, filed June 21,

Q 1935, and issued June 7, 1938, there is described a process for converting a tubular package of viscose rayon yarn on the throwing machine into crepe yarn or other highly twisted yarn. This package is designed to carry /4 to lb. Of yarn which while twisting to 40 turns/inch or more will last for several days on the spindle before it runs out. As pointed out in this patent, such a process has very decided economic advantages and more recently it has been found that still greater economic advantages result by the present invention which affords an increase in the yarn package to 1 lb. or more in size.

In view of the time it takes to twist the yarn from a 1 lb. package, which may be a matter of seven or eight days of continuous operation, the top and bottom ends of the package become badly soiled, making the crepe fabric woven from this yarn unsuited for dyeing in pastel shades or unfit for use aswhite goods. The gray goods produced from this yarn are very noticeably streaked with dirt which is twisted into yarn and cannot be removed by boil-off or bleaching. In spite of the very decided economic advantages inherent in this process it appeared that in the absence of some solution to this soiling problem the entire process would have to be abandoned.

It is, therefore, an object of this invention to provide an improved package adapter. A further object is the provision of means for protecting the yarn against soiling during the period it remains on the throwing spindle. Other objects will be apparent from the description that follows.

The objects of the invention are accomplished by the use of an uptwister package assembly having a support for the yarn package and removable fianges substantially covering the ends of the yarn package. In one embodiment, the assembly has an adapter base and adapter cap for the throwing spindle for supporting the core on which the yarn is wound. The base and cap are provided with end flanges which are suitably designed to fit snugly over the ends of the package or to touch substantially the yarn and thus prevent soiling of the yarn while it remains in the package on the twister spindle. The cap and the base are held on the core in an inter-docking fashion and the fiyer is interlocked on the cap. The drop wire on the fiyer preferably has a double bend in it to restrict it from moving outward during rotation of the assembly. I

The invention will be more readily understoo by reference to the drawings in which:

Figure l is a plan view;

Figure 2 is a side elevation showing the assembled unit;

Figure 3 is a plan view of the base;

Figure 4 is a bottom view of the base;

Figure 5 is a sectional view taken on line 5--5 of Figure 2 showing the relationship between the fiyer, cap and core;

Figure 6 is a sectional view taken on line 6-6 of Figure 1;

Figure '7 is a sectional view taken on line 1-1 of Figure 2;

Figure 8 is an elevation of the cap;

Figure 9 is a plan view of the core and.

Figure 10 is an elevation of the base.

Referring to Figure 2, the yarn package consists of a rigid, light-weight core I of aluminum,

magnesium or alloy of light metals or of a molded or extruded plastic, such as ethyl cellulose or other cellulose derivative, or of cardboard or fiber, or the like and yarn 2 wound thereon. Inserted in the lower opening of the cylindrical core I is an adapter base 3 which fits tightly on spindle 4 which is driven by any conventional means not shown. Inserted in the top of core I is cap 5 and inserted in the cap is fiyer 6. The relationship of the three elements, base, cap and fiyer is shown in the plan view in Figure 1.

The base 3 has lands '1' which form grooves 8 into which lands 9 contained in the core I fit. These lands 9 on the inside of core I run longitudinally the full length of the core and there are, generally ,a plurality of them. It is preferred to extend a plurality of lands 7 up part way on the cylinder section it of base 3. The ribs ll so formed fit snugly on the inside surface of core I and thereby add stability. While three lands 9 and three ribs II are shown, the number maybe more or less than. that. The lands, grooves and ribs of base 3 may be seen in Figures 3, '7 and 10 and the lands 9 of core I may be seenin Figure 9.

The fitting of the lands 9 in grooves 8 serves as a lock and driving means for core I. Figure 4 shows how the bottom of base 3 is recessed at I 3. Usually only recess [3 is needed to receive the clutch part of spindle 4 (not shown) and thereby act as the driving. key-way. Recesses l2 and I4 are used to. lighten the member. The ro- Wires I9 and 20.

tation of spindle 4 by a motor or belt driven by motor causes the adapter base 3 to rotate and this in turn causes the core I to rotate. The parts rotate as a unit at the same speed.

Inserted at the top opening of core I is the adapter-cap 5. This fits snugly against the inside walls of core I in a manner similar to that of base 3. Adapter cap is fitted with lands l5 forming grooves I6 and a plurality of the lands [5 are extended up on cylinder section [1 to form stabilizing ribs [8. The construction is shown in Figure 8. The fitting of cap 5 and base 3 in core I is shown in Figure 6. The cooperation of the lands and grooves holds the adapter cap securely in place.

In accordance with the usual practice, fitted into the adapter cap 5 is the flyer 6 carrying Both the adapter cap and flyer fit on the spindle 4 and the flyer 6 fits into the cap by means shown in Figures 5 and 6. There is free motion between the flyer and spindle and between the flyer and cap. As shown in Figure 6 a ring 2| is inserted or made an integral part of cap 5 and this ring has an overhanging edge 22. In Figure 5 it can be seen that flyer 6 has on its lower part of its cylindrical section 23 a protruding member 24. The fittin of spindle i in the cylindrical section 23 and the cooperation between the edge 22 and protuberance 24 prevents the flyer 6 from flying off during the high speed rotation of the package. The flyer 6 is inserted in cap 5 by tilting the flyer so that protuberance 24 slips under edge 22 and after the flt is made flyer '5 falls into place on the top of cap 5 upon which it rotates. The wires 19 and 28 have the usual eyes 25 through which the yarn is passed during processing.

The eye on drop wire [9 must be substantially .below the junction point between cap 5 and the end of the yarn package. This location is necessary in order to prevent yarn breakage due to wedging between the cap and package, for due to the high speed of rotation the wire will be thrown out and up by centrifugal force. The drop wire l9 preferably has a double bend in it, one at 2B and the other at 29. While a single right end bend is operable, the double bend. arrangement has advantages in that more clearance is obtained and the drop wire is not forced outwardly by the centrifugal force as much as it is in the single bend arrangement. In a preferred construction of flyer 6 both the members 30 in which the drop wires l9 and 20 are inserted and the base 31 are made longer than shown in Figure 1, in order to reduce the horizontal length of the wire and reduce its tendency to be bent upwardly by centrifugal force. The extra length of 39 and 3| and the double bend feature of drop wire is permit operation under yarn tensions about 20% lower than possible with the usual flyer. A mere increase in the length of a single-bend drop wire is unsatisfactory because the centrifugal force straightens the wire out to a point where the greater drop is ineffective. The use of heavy wires leads to undesirable higher tensions. The double bend arrangement and the added support provided by the longer members 30 and. 3| solve the problem and involve none of the above disadvantages. The extra length of members 39 and 3! also provides for lower tensions.

The lower portion of the base 3 has a flange 26.upon which the yarn 2 rests. A similar flange z'l'isprovidedat the top by adapter cap 5. The top end of'the yarn package 2 is in contact with this flange. A square-ended yarn package is provided for and the surfaces at both ends are protected by flanges, as seen in Figure 2.

This protection prevents the yarn 2 from becoming soiled. The flange spacing is precisely located sov that the flange covers the package end without imposing excessive end pressure and without permitting any substantial free space between the flange and the end of the yarn package. The yarn package may extend'somewhat beyond the end of the flange of cap 5 provided the part extending is processed in a relatively short time so that no part of it becomes soiled. In general, the flanges completely cover the ends of the yarn package; It is possible to use tapered flanges which do not contact, say, for example, the outer half of the yarn package but which do contact the inner half of the package, the outer portion being unwound before it gets appreciably soiled. The inner portion-must be protected. An air gap between the cap and yarn of of an inch leads to soiled yarn. A gap of V of an inch or less may be tolerated. Preferably, the ca rests on the yarn package throughout its width.

Other positive locking means may beemployed. For example, the core may have notches at its ends cooperating with a horizontal key. Internal expandable rings and such spring means as shown in the Ramsdell patent, however, do not give satisfactory results, since there is slippage of the yarn and resultant abrasion. The interlocking means described in this invention are preferred since they are positive, easily formed and involve no abrasion of the yarn. Contact of the flanges with the yarn does not hinder the unwinding and materially aids in holding the yarn package in place during starting and stopping of the assembly.

The apparatus of this invention is highly advantageous in that the locking arrangement between the core and the base and the core and the cap prevents the yarn package from slipping when the assembly is stopped or started on the spindle. This is very important, for if there is skidding of the yarn relative to the base and/or cap considerable scuffing and abrading of the yarn results. Proper interlocking provided by the package adapter of this invention is essential for satisfactory yarn quality.

With the package of this invention it has been found possible to crepe twist 1 1b. packages of -denier viscose rayon with the production of clean, highly satisfactory yarn in every way competitive with crepe yarn made heretofore.

The comparatively large size of the package produced in accordance with this invention will permit a long period of twisting per spindle without changing packages. In spite of the change in diameter of the package from the beginning to the end of the twisting thereof, it has been found that the thread tension does not vary greatly and that a substantially uniformly twisted crepe thread is produced.

The light-weight core used in accordance with the present invention may be of such cheap construction that it is suitable for one way ship! ment, or, if desired, the cores may be returned and reused. The parts are readily assembled and the unit is self-locking. In accordance with the present invention a larger quantity of artificial thread can be mounted on a spindle for twisting. A relatively large package of yarn can be prepared and wound, with more perfect wind than is possible with the use of headed spools such as previously used in the crepe twisting of artificial silk, thus greatly reducing difiiculties cellulose acetate, benzyl cellulose, glycol cellulose yarn, and the like.

Many changes and modifications may be made in the present invention without departing from the nature and spirit thereof. It is therefore to be understood that the invention is not to be limited to specific steps and modifications above described except as set forth in the appended claim.

We claim:

A removable flange, self-locking uptwister package assembly comprising a cylindrical core for supporting a square-ended yarn package; longitudinal lands along the full length of the inside surface of said core; a flanged adapter base having grooves to receive said lands at the bottom end of said core, said base having a recess to receive an end'of said core which will substantially cover and substantially contact the bottom end of a supported square-endedyarn package; a cylindrical upstanding extension on said base bearing ribs, bracing and centering said base in said core; on the bottom side of said base a key- Way cooperating with a driven spindle, a flanged adapter cap having grooves to receive said lands at the top end of said core, said cap having a recess to receive an end of'said core and substantially covering and substantially contacting the top end of said yarn package; and a downward extending cylindrical extension on said cap bearing ribs, backing and centering said cap in said core; a bore being provided through the aligned centers of theassembled said base, said core and said cap to permit mounting on said spindle.

EARL WILLIAM PAEPLOW.

MESSOUD KIACI-IIF.

References Cited in'the file of this patent UNITED STATES PATENTS Number Name Date 1,050,785 Austin et a1 Jan. 21, 1913 1,754,274 Kjellstrom Apr. 15, 1930 1,879,963 Vacher Sept. 27, 1932 1,977,714 Beran Oct. 23, 1934 2,085,831 Schlums July 6, 1937 2,190,085 Scholl Feb. 13, 1940 2,237,837 Markle Apr. 8, 1941 2,259,826 McHale Oct. 21, 1941 2,371,939 Winslow Mar. 20, 1945 2,476,928 Thomas 1 July 19, 1949 FOREIGN PATENTS Number Country Date 8,222 Great Britain Apr. 5, 1910 8,882 Great Britain May 4, 1895 540,535 Great Britain, Oct. 21, 1941

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