US2628740A - Spinning bucket and cover therefor - Google Patents

Description

Feb. 17, 1953 H. p. HALEY SPINNING BUCKET AND COVER THEREFOR Filed Nov. 10. 1948 INVENTOR. HUGH 0. HALE) BY Patented Feb. 17, 1953 SPINNING 'BUCKEI AND COVERTHEREFOR 1HughrD. HalemDrexelHill, Pa., assignor tmAmerican Viscose Corporation, Wilmington, Del.,;a

corporation of Delaware Application November 10, 1948, SerialNo.59,316

7 Claims. (01. 220-61) This invention vrelateswto :a spinning bucket and removable cover therefor having "cooperating parts which maintain the cover in place our, ing collection pofastrand, such a542, freshly spun viscose rayonsyarn, at. high speed rotation ofa spinning :bucket assembly.

it is: an vobject ,of the :invention to provide, a

spinn ng, bucket cover which :may be readily Pushed into vplace by manual efiortand may b Quickly. removed by moderate manually applied pullingforce.v It is also anobject to provide-a lightweight tightfittin cover of inexp nsive construction. It is another object to prov de a li htweight: and. well-balanced construt ionhavin dynamic stability at high speed rotation. Still ano her object is tojnrovidea cover which fits closely to the cylindrical cakeformin areaof the bucket seas-t0 p event rre ular eake formation at t eendthereof adiacen tbe. seven, ther Qbjeots. ea res. and advantages'ofthe invention will begyobvious from hetfollowing description and the drawing n which;

Eig. .1- is a front elevation partly in sectionzof one embodiment 'of the invention;

.Eig.,2 .is:a fragmentarytop view of.-the cQver illustrated in Fig. 1;

.F .3 is a, front elevation partially in section illustrating a modifiedv cover in .nlaceon the bucket;

4: isa fragmentary top view of the lustrated inll i .v 3;

Fig. .5 is a. fragmentary sectional view .in ele vatlonv illustrating a bucket having, a modified rim section;

Fig, 6 is a fragmentary plan view of a modified spinning bucket rim, section;

"Tis a fragmentary sectional elevation view ofth'e rim section illustrated in 16 with, a.

modified bucket cover 'in place; and

Fig. "8 .is a sectional elevation, view of still another 'modifiedjbucket lid showing aportion of the "bucket in section.

Briefly, the invention is an 'arrangementfor securing a cover in the 'rim'ofa spinning bucket comprising 'a cover of larger diameter than the bylindrical cake forming surface 'of" the bucket "and having a resilient ring or a "series of ring segments 'atleast' half submerged and secured; within a circumferential groove 'or'series of segmental grooves within its peripheral surfaee, a cylindrical surface in the. rim of larger diameter than the cover but of a, slightly smaller'diameter than the extreme diameter of; theresilient-ring or a ring'formed by separatecl' arcuateportions, and:aseatfor thecover formed by an annularsurface or shoulderextending be tween adj aeent concentric -ends of the cylindri cal-surfaces.

Fig. 1 illustrates an embodimentof the invention whereina cover 8 is supported on an annular shoulder 9 extending between the cylindrical cake forming surface H :of thebucket v.fll and the inner peripheral cylindrical :surface :12 of :the bucket 'rim 14. The lower surface- P5 of the cover 8 and the surface of -the annular shoulder =9 are in continuous :contact :when in the operating position so; as to prevent the-formation 'of a cake having lloose strands .around one I endthereof. .Theiextremeediameteraofathe cover 8 1s such as itoiprovidea 48111211 :annular space between it andthe'inner periphery of the "bucket rim of perhaps a-rfewvhundredthsof aniinch. (The outer peripheral surface .I l of covert8 is iannular, and preferablyapproximately cylindrical, and contains ;a circumferential :groove 18 for supporting a ring .;20 10f 1a resilient-material. In .the embodiment illustrated by Fig. l, the .r'lngcZD :is round in =1CTOSS section and :is supported .in the groove l8 TJSO "that an outer circumferential ;sec,-

tion protrudes from the :grooveaand .the :submerged :zseotion extends intov the groove to .a depth greater ithanrthe, radius of the across .560-

tion, thatvisato say, thethickness ;of the cross.

section measured radially 20f .theirin is; oneyto two times the depth of ,the groove. The groove i preferablvznarrower near the peri hery of the cover than at an intermediate depth so that :the ring after being forced into place within the roove, is trapped therein by theginwardly-flared sidesand constricted entrance sides of the groove.

The extremediameter of the ring=2il issuchthat the ,ring is under slightcompression 'when the cover is forced intoposition within .the bucket rim. Thediameteriof the ring 211. may be greater than theinner diameter of the bucket-rimon the-order of several .thousandths of an. inch for example, 0.001 to 0.010 .of an ,inch; a difference 0f five thousandths hasbeenfound quitesatisfactory.

The cover B.may.be ..slight1y.recessedalon ithe outer. annular. margin ..of the lower. surface l I 5 to provide-a surface which engages the annular. sup.- porting surfaces of the bucketandalso to provide a shoulder .22 on the cover which slightly overlaps .the surface ,I l of the bucket. .Theshoulder ,122' more positively centers .the ,.,cover within the bucket .and tends to eliminate the, possibility of; a gap forming. between the cake .formlng surfaces o'fthe cover and the bucket. Any yarn getting into the opening between the lid and the inner surface of the bucket rim would wind unevenly off the end of the cake and interfere with later processing of the cake. In order that the cover may be light in weight, its upper surface 24 may be recessed as shown to reduce the thickness of the center section while leaving an outer annular section to accommodate the groove ring 20. The upper edge of the rim M has a rounded surface 26 contiguous with the surface 12 of the ring which facilitates introduction of the cover into the rim portion of the bucket. Fig. 2 shows in top view a portion of the cover 8 and a continuous construction of the ring 20.

Fig. 3 illustrates a modified bucket cover 28 of simple fiat disk construction provided along its periphery with an annular ring 29 of modified design. As in the earlier described embodiment, the ring 29 is held within a constricted roove 30 which tends to trap the ring and prevent it from being pushed from the groove in the event that it loses its adhesive contact with the walls of the groove such as from swelling and stretching of the resilient materials comprising the ring. As in the embodiment shown in Fig. 1, the cover '28. has a smaller diameter than the inner surface of therim l4 whereas the ring 30 has a slightly larger outside diameter than the inner rim surface so that the ring engages the rim surface when the cover 28 is placed in operating position. The ring 29 may be of continuous ring structure similar to the ring of Figs. 1 and 2 or it may comprise a number of segments such as segmental elements or arcuate sections 32 disposed along, and having a thickness of from one to two times the depth of, the groove of Fig. 4. Adjacent ends of each of the elements 32 may be spaced to provide gaps through which liquids carried into the bucket by the yarn may escape from the bucket during a spinning operation. In this event, several notches such as the notch 33 are provided in a radial direction across the shoulder 34.

Fig. 5 illustrates in fragmentary section view, portions of a modified spinning bucket Illa and a cover 28a. The bucket is distinguishable from previously described buckets by a rim section Ma having a tapered inner surface Fla. The surface I2a varies with respect to a true cylindrical surface to the extent that it is tapered in a range of one to five degrees from a direction parallel to-the axis of the bucket. This slightly tapered surface improves retention of the cover within the rim and resists the small axial pressure exerted by the cake and liquids carried into the bucket during the spinning operation while subjected to centrifugal force. The taper is such that it is hardly noticeable to the eye; it does not increase the force needed to insert the cover into the bucket or to extract it therefrom to any substantial extent. As in the previously described bucket Ill, the rim [4a of the bucket Illa is provided with a rounded edge 26a to facilitate insertion of the cover 28a.

The escape of liquids from the spinning box carried thereinto by the freshly extruded yarn, may be obtained in a conventional manner through holes 35 in the wall of the bucket I0 intersecting the upper margin of its cake collecting surface. Figs. 6 and '7 illustrate another arrangement whereby liquid may escape through a channel 31 extending vertically along the inner peripheral surface of the bucket rim 36 and radially across the bucket cover seating surface 38.

4 If three such channels are formed in the bucket rim apart. a channel depth of approximately 0.04 of an inch is adequate to remove the undesired liquid from a bucket for producing cakes 7 inches in diameter or larger. However, the number of channels 35 and their depth may be varied as desired. The channels are conveniently formed by a drilling or cutting operation with, for example, a 0.25 inch drill bit, or they may be molded in place, especially if the bucket is formed from a resinous and/or fabric material. Fig. 7 illustrates also a modified bucket cover 40 having a flange 4| of sufficient diameter to extend over at least a portion of the upper surface 43 of the rim 36; such construction prevents any material or dirt that may fall upon the cover from being thrown into the gap between the inner surface of the rim 36 and the adjacent peripheral surface of the cover. It also permits easy washing away of any salt crystals that might form on top of the lid or cover.

The material used to form the resilient rings or ring segments used to hold bucket covers in place may be of any resilient material which is resistant to fatigue and to the acids or other solution encountered in processes such as the spinning of viscose rayon filaments. Such materials include natural rubber and such synthetic rubbers as polymerizates of chlorobutadiene, butadiene and styrene, and butadiene and acrylonitrile, or non-corrosive metallic springs. The

ring member may be formed in accordance with any cross section desired but preferably is contained in a groove which may substantially enclose it leaving a smaller circumferentially extending portion protruding from the rim to contact the bucket rim.

Fig. 8 illustrates a cover 45 of unitary structure in place within the rim of the bucket Ill. The cover, when removed or not otherwise subjected to constriction or deformation, has an extreme diameter of a few thousandth-s of an inch greater than the inner diameter of the flange M of the bucket. The lid is formed from a slightly resilient material such as a hard natural or synthetic rubber vulcanizate which permits the rim of the lid 45 to undergo sufficient deformation to accommodate to the smaller diameter of the bucket rim when urged into place by moderate manual effort. To obtain the resiliency and rigidity required in the cover to impart the desired shape to the cake, and to provide a cover which exerts sufficient pressure against the bucket rim surface for holding the cover in place,

consideration is given to such factors as thickness of the body portion of the cover, composi tion of the vulcanizate, and degree of vulcanization. The cover is formed with sufficient thickness to prevent deformation of its body portion from the constriction imposed on the peripheral portion 46 by the bucket rim, and/or the pressure exerted on it by the end of the cake during the building thereof. The thickness of the rim or peripheral section is proportioned with respect to the body portion of the cover so that the deformation caused by forcing the cover into the buckits peripheral surfaces such as the "groove 4'1 which permit the escape of liquid carried into the spinning box'by the strand. i

"The bucket and cover assembly provided-b'ythis invention makes possible more rapid doiiing of cakes than when caare doffed from the-con ve'mional buckets and covers. It is possible to remove and insert covers of the type he-rein de scribed in a :matterof two to five seconds. Moreover, on account of the r-extreme simplicity of the cover and rim section of the bucket, the bucket andcover maybemore lightly constructed thereby reducing the cost and the weight of the assembly and givinggreater freedom from vibration at high-speed rotation. Since the surface of the various parts are concentric withrespect to the bucket axis, the bucket and cover assembly is easily manufactured to close specifications. The provision of a resili nt ring on the cover causes the cover'to fit tightly and become accurately centeredwhen placed in a bucket. If the rin is substantially enclosed or trapped within the groove on the cover as illustrated and hereinbefore "explained, it is prevented from separating fromthe cover during the dotting operation and becoming lost or having to be replaced. Moreover because of the tightness and resiliency with which such a cover is supported in a bucket, the cover has greater freedom from chattering re suiting from looseness between the cover and the bucket encountered in other types of equipment.

While a preferred embodiment of the invention has been described and shown, it is understood that changes and variations may be made without departing from the spirit and scope of the invention as defined in the appended claims.

Iclaim:

1. Apparatus for collecting a strand material comprising a spinning bucket having a rim portion and a body portion, an interior cylindrical surface Within the rim portion of a slightly larger diameter than the cake forming surface of the body portion, an annular surface extending between adjacent ends of the surfaces, a cover for the bucket of smaller diameter than the inner diameter of the rim portion, a groove along the peripheral surface of the cover, and a plurality of resilient arcuate members occupying the groove having a thickness in the range of from one to two times the depth of the groove and such that portions of the resilient members protrude exteriorly of the groove to engage the cylindrical surface of the rim portion.

2. Apparatus for collecting a strand material comprising a spinning bucket having a body portion and a rim portion, an interior cylindrical surface within the rim portion of slightly larger diainete' than the cake forming surface of the body portion, an annular surface extending between adjacent ends of the surfaces, a cover for the bucket of smaller diameter than the inner diameter of the rim portion, a groove along the peripheral surface of the cover having a greater width in axial direction inwardly of the peripheral surface than at the surface thereof, and a resilient rin member having a radially inner annular portion which fits tightly Within the groove against the bottom and inwardly-flared side surfaces thereof and an annular outer portion extending exteriorly of the groove having a normal outer diameter slightly greater than the inner surface of the rim portion.

3. Apparatus for collecting a strand of material comprising a spinning bucket having a rim portion and a body portion, an interior cylindricalsur'fac'e within the rim portion tapered tea slightly larger diameter toward the body portion, a cylindrical cake forming surface within the body portion of smaller diameter than any portion of the-inner rim surface, an annular surface extending between adjacent ends of the inner surfaces of therim portion-and the'bodyportion, a cover for the bucket of smaller diameter than any portion of the inner rim surface, but greater than'the diameter of the inner bodyportion surface, a groove along the peripheral surface-of the cover'h'aving a circumferentially extending portion inwardly of the surfaceof greater width than a circumferentialportion "of the groove nearer the surface, a plurality of resilient segmental ring members extending through substantially the enthe length of the groove having portions thereof contoured to fit and be secured Within the groove, and other portions of the ring members extending exteriorly of the groove to engage the inner surfaceof the rim.

4;. Apparatus for collecting a strand material comprising a spinning bucket having a body portion and a rim port-ion, interior cylindrical surface within the-rim portion of slightly larger diameter than the cake-forming surface of the body portion, an annular surface extending between adjacent ends of the surfaces, a cover for the bucket of smaller diameter than the inner diameter of the rim portion, a groove along the peripheral surface of the cover having a greater width measured in an axial direction inwardly of the peripheral surface of the cover than that measured along the surface, and a resilient ring member having a radially inner annular portion fitting tightly against the bottom and the inwardly flared side surfaces of the groove, thering member also having an outer annular portion extending exteriorly of the groove. the out-- side diameter of the ring member being 0.061 tn 0.010 inch greater than the inner surface of thw rim portion when not in place within the rim por tion.

'5. Apparatus for collecting a strand material comprising a spinning bucket having a body po tion and a rim portion, an interior cylindrical Sill face within the rim portion of slightly larger di ameter than the cake-forming surface of the body portion, an annular surface extending between adjacent ends of the surfaces, a cover for the bucket having a smaller diameter than the inner surface of the rim portion of the bucket, a groove along the peripheral surface of the cover having a greater width with respect to an axial direction inwardly of the peripheral surface of the cover than that measured along the surface, and

resilient arcuate means having radially inner arcuate portions which fit within the groove against the bottom and the inwardly flared side surfaces thereof, and outer arcuate portions not contained within the groove which resiliently engage the inner surface of the rim portion.

6. Apparatus for collecting a strand material comprising a spinning bucket having a body portion and a rim portion, an interior cylindrical surface within the rim portion of slightly larger diameter than the strand-receiving surface of the body portion, an annular surface extending between adjacent ends of the surfaces, a cover for the bucket comprising one portion having a diameter smaller than that of the strand-receiving surface of the bucket and a second portion having a diameter greater than that of the strand-receiving surface and less than that of the inner surface of the rim portion, a circular groove extending along the peripheral surface of the second-named portion of the cover havin a greater width, as measured in an axial direction inwardly of the peripheral surface, than that measured along said peripheral surface, and resilient arcuate means having radially inner arcuate portions which fit tightly within the groove against the bottom and the inwardly flared surfaces thereof, and outer arcuate portions not contained within the groove which resiliently engage the inner surface of the rim portion.

7. Apparatus for collecting a strand material comprising a spinning bucket having a rim portion and a body portion, an interior cylindrical surface within the rim portion tapered to a slightly larger diameter toward the body portion, a cylindrical strand-collecting surface within the body portion of smaller diameter than any portion of the inner rim surface, an annular surface extending between adjacent ends of the inner surfaces of the rim portion and the body portion, a cover for the bucket of smaller diameter than any portion of said tapered rim surface but greater than the diameter of the strand-collecting surface, resilient arcuate means having at least one radially outer surface of a diameter slightly larger than'the inner diameter of substantially all of the tapered rim surface, and a circular groove for receiving the arcuatemeans extending inwardly of the peripheral surface of the cover at a depth less than the thickness, but greater than half the thickness, of the arcuate means, the inner diameter of the groove being substantially equal to the inner diameter of the garcuate means, said arcuate means fitting tightly against the bottom and side surfaces of the groove.

HUGH D. HALEY.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,986,433 Harrison Jan. 1, 1935 2,270,998 McDermott Jan. 27, 1942 FOREIGN PATENTS Number Country Date 422,122 Germany Nov. 24, 1925

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