US3465984A - Lap carrier resiliently compressible in axial direction - Google Patents

Description

Sept. 9, 1969 5,11 ,355 ETAL 3,465,984

LAP CARRIER RESILIENTLY COMPRESSIBLE IN AXIAL DIRECTION Filed Nov. 8, 1967 4 Sheets-Sheet 1 INVENTORS Sept. 9, 1969 TIGGES ETAL 3,465,984

LAP CARRIER RESILIEN'I'LY COMPRESSIBLE IN AXIAL DIRECTION Filed Nov. 8, 1967 4 Sheets-Sheet 2 INXENTOR. '7 W 44hr} Sept. 9, 1969 a. TIGGES ETAL 3,465,984

LAP CARRIER RESILIENTLY COMPRESSIBLE IN AXIAL DIRECTION Filed Nov. 8, 1967 4 Sheets-Sheet 1w q I 1 ii i Sept. 9, 1969 115 55 ETAL 3,465,984

LAP CARRIER RESILIENTLY COMPRESSIBLE IN AXIAL DIRECTION Filed NOV. 8, 1967 4 Sheets-Sheet 4 INVENTOR.

United States Patent 3,465,984 LAP CARRIER RESILIENTLY COMPRESSIBLE 1N AXIAL DIRECTION Gerhard Tigges, Kohlfurther Brucke 29, Wuppertal- Cronenberg, Germany, and Walter Henning, 5113 B210- mann-Lonssh 1, Hoengen, Germany Filed Nov. 8, 1967, Ser. No. 681,500 Claims priority, application Germany, Nov. 10, 1966, T 32,492; Sept. 6, 1967, T 34,726 Int. Cl. B6511 75/20 U.S. Cl. 242-11311 11 Claims ABSTRACT OF THE DISCLOSURE A lap carrier resiliently compressible in axial direction and defining a surface area, which comprises end rings and at least one intermediate ring. A plurality of carrier elements is disposed between the end rings and has outer edges. The outer edges are oriented toward the surface area of the lap carrier. The carrier elements comprise elastically bendable stays equally distributed along the periphery of the lap carrier and are inclined for at least a part of their length to the longitudinal axis of the lap carrier, and the stays are rigidly secured to the rings.

The present invention relates to a lap carrier resiliently compressible in axial direction, in general, and to such lap carrier having a surface area of cylindrical or truncated cone shape and carrier elements disposed between end rings at the end sides and aligned with their outer edges to the mentioned surface area, in particular.

Lap carriers resiliently compressible in axial direction are known, preferably for the wet treatment of yarn cops, for instance for dying the same. A known structure uses a helical spring, the windings of which project through flat, uncovered or covered chain-like members, which form the cylindrical surface area. The production of such lap carriers is extremely complicated. It must be performed practically completely manually, particularly in order to obtain the threading of the winding turns of the helical spring through the chain-like members. The corresponding lap carriers are therefore extremely expensive. They are also very much subject to destruction.

In order to bring about a simpler structure, lap carriers are known which are resiliently compressible in axial direction and which comprise two equal parts, each consisting of an end ring and rods disposed parallel to the axis of the spool and rigidly inserted at equal distances in the end ring. The rods of the parts which enter in a direction towards each ohter and between each other are displaceably guided in guide openings of a center ring, whereby a helical spring is disposed inside of the rods, which helical spring exerts pressure on the end rings and pushes the latter outwardly. These lap carriers have not been accepted by the trade. Aside from a likewise comparatively expensive production, they have the drawback, that the two lap carrier parts do not form a common cylindrical surface area. The rods of one part are disposed rather on one cylindrical area with a larger radius than the rods of the other part. If the yarn lap carrier sits in the axial bore of a yarn spool, and if it is then pushed together, the ends of the carrier rods disposed on the outer cylindrical surface area damage and vary, respectively, easily the inner yarn layers.

In order to avoid this drawback, finally lap carriers resiliently compressible in axial direction are known, the casing of which is formed by two coaxially disposed cages, which are displaceable towards each other by the tension of a spring, and each of the cages comprises longitudinal carrier elements, which jointly define a cylinder and are secured with one end to one end ring, whereby the carrier elements at the other end have a passage for a holding ring, which projects alternately through the passages of one cage and those of the other cage and thus connects together the two cages. These lap carriers have the advantage, inherent in its use, that both lap carrier cages are disposed practically on one single cylindrical surface area; they have, however, again the drawback of an extremely complicated production and the drawback, that no sufficient buckling stability in axial direction is present. In case of a buckling in axial direction the drawback occurs, that the ends of the hair-needle shaped bent wire-carrier elements project piercingly from the cylindrical casing. This leads again to the danger of damage of the yarn winding layers.

It is one object of the present invention to provide a lap carrier resiliently compressible in axial direction, wherein by a simplest and possibly integrally produced structure a high buckling stability in axial direction is brought about, in spite of the possibility of easier and greater axial compression than possible in the known structures.

It is another object of the present invention to provide a lap carrier resiliently compressible in axial direction which comprises carrier elements formed of stays which are elastically bent through and extending for at least one part of its length inclined to the longitudinal axis of the lap carrier, as well as sitting rigidly on the rings and equally divided over the periphery of the lap carrier.

By this arrangement an extremely simplified structure of a lap carrier of this type is created. By example, in case of production by means of an injection-molding process of synthetic material an integral structure can be obtained, which does not require any finishing work. The lap carriers can be manufactured at such favorable costs, that they can be used as disposable lap carriers. This brings about first of all the advantage, that the lap carriers remain in the spool after dying and can be discarded after treatment of the spool yarn. It has been found, that an appreciable axial stability is obtainable. It has been found further, that depending upon the form of the stays an appreciably greater compressibility is obtainable, as it was possible with the known structures.

In the production of the lap carrier, rendered integrally by the present invention, of suitable synthetic material, the selection of the material can take place without difficulties such, that the lap carrier remains during a hotdying process in its compressed state provided therefor, thus does not expand again in axial direction upon removal of the axial pressure, an expedient which can be of appreciable advantage for the later unwinding of the yarn over head.

It is still another object of the present invention to provide a lap carrier resiliently compressible in axial direction wherein the stability of the lap carrier against axial buckling is appreciably increased by directing the narrow edges of the stays to the surface area. This reduces also appreciably the friction between the inner yarn layers of the axial bore of the yarn spool during compression.

It is yet another object of the present invention to provide a lap carrier resiliently compressible in axial direction which comprises intermediate rings concentrically disposed relative to each other and arranged above each other, which intermediate rings are connected to each other by means of the stays, in order to provide a further advantageous structure which enhances the inner stability.

It is also an object of the present invention to provide a lap carrier resiliently compressible in axial direction, wherein the stays have buckling-bending points, in order to bring about the advantage of an extensive localization of the elastic bending of the stays.

It is a further object of the present invention to provide a lap carrier resiliently compressible in axial direction, wherein the bending zone is formed by annularly closed stays with part-sections, depending upon the character of the yarn forming the ball.

It is a still further object of the present invention to provide a lap carrier resiliently compressible in axial direction, wherein the stays comprise frames of approxi mate U-shape which are connected with sections of the lap carrier rings, whereby the sections point outwardly from the frame ends.

It is yet another object of the present invention to provide a lap carrier resiliently compressible in axial direction, wherein the stays are of S-shape.

It is yet a further object of the present invention to provide a lap carrier resiliently compressible in axial direction, wherein the stays have predetermined bending cross-sections and bending cross-sections obtained by portions of lesser material thickness, respectively.

It is, however, also an object of the present invention to provide a lap carrier resiliently compressible in axial direction, wherein in the production of such lap carriers in integral form, for instance, in a molding-injection process of synthetic material, the suflicient axial buckling stability can be obtained most extensively without regard to the use of working material, by connecting together the apex zones of the individual stays of the integrally injected lap carrier, which apex zones are disposed in the same cross-sectional plane, with a stabilization ring formed to and of the same material as that of the lap carrier.

The relatively low load of the stabilization ring, in particular the relatively low cross load thereof, permits in an advantageous manner, in accordance with the present invention, that the stabilization ring connecting the apex zones of the V-shaped stays jumps back relative to the outer edge of the stays defining the surface area and has a thinned cross-section relative to the end rings and the intermediate rings. This solution is not only technically favorable, but contributes also to a merely slightly increased material requirement.

It is, however, a still further object of the present invention. to provide a lap carrier resiliently compressible in axial direction, wherein the inner face of the stabilization ring is flush with the inner edge of the stays and with the inner edges of the end and intermediate rings.

It is yet a still further object of the present invention to provide a lap carrier resiliently compressible in axial direction, wherein the width area of each pair of adjacent stays disposed in the same cross-sectional plane is directed alternately radially and inclined to the radial direction.

With these and other objects in view which will become apparent in the following detailed description, the present invention will be clearly understood in connection with the accompanying drawings, in which:

FIGURE 1 is an elevation of a first embodiment of the lap carrier designed in accordance with the present invention;

FIG. 2 is a top plan view thereof;

FIG. 3 is an elevation of a second embodiment of the lap carrier, shown partly in expanded position and partly in compressed position;

FIG. 4 is a top plan view of the lap carrier disclosed in FIG. 3;

FIG. 5 is an elevation of a third embodiment of the lap carrier, partly broken away for a better demonstration;

FIG. 6 is a top plan view of the lap carrier disclosed in FIG. 5;

FIG. 7 is an elevation of a fourth embodiment of the lap carrier, partly broken away for the purpose of better demonstration;

FIG. 8 is a top plan view of the lap carrier disclosed in FIG. 7;

FIG. 9 is an elevation of a fifth embodiment of the lap carrier, partly broken away for the purpose of better demonstration;

FIG. 10 is a top plan view of the lap carrier disclosed in FIG. 9;

FIG. 11 is an elevation of a sixth embodiment of the lap carrier, partly broken away for the purpose of better demonstration;

FIG. 12 is a top plan view of the lap carrier disclosed in FIG. 11;

FIG. 13 is a side elevation of the lap carrier disclosed in FIGS. 11 and 12, partly broken away for the purpose of better demonstration; and shown in expanded position;

FIG. 14 is a side elevation of the lap carrier similar to that shown in FIG. 13, but shown now in compressed position;

FIG. 15 is a section, along the lines 15-15, of FIG. 13; and

FIG. 16 is a part section, along the lines 16-16 of FIG. 13.

Referring now to the drawings, and in particular to FIGS. 1 and 2, the lap carrier, designed in accordance with the present invention comprises end rings 1 and 2. Carrier elements in form of elastically bendable stays 3 extend between the end rings 1 and 2. The stays 3 are integrally formed with the end rings 1 and Z and are supported in the median range by an intermediate ring 4.

The stays 3 have longitudinal sections 3' and 3" disposed inclined to the longitudinal axis xx of the lap carrier. Buckling-bending points 5 are provided between the sections 3 and 3".

The stays 3 are equally distributed along the periphery of the lap carrier. The opening angles a defined between the sections 3 and 3" point into the same peripheral direction.

The narrow faces 3" of the stays 3 point outwardly, thus towards the surface area of the lap carrier.

Referring now again to the drawings, and in particular to FIGS. 3 and 4, the lap carrier is designed in a manner similar to the embodiment disclosed in FIGS. 1 and 2, but a plurality of intermediate rings 4' are provided. The stays 6 extend between each pair of adjacent intermediate rings 6 and the respective end rings 1 and 2, respectively, and comprise again elastically bendable material. They form between each pair of adjacent rings merely one buckling point 7. The sections 6 and 6", extending from the buckling point 7 in the same direction define the angle 6 therebetween. These formed open angles ,8 point alternately between each pair of adjacent stays 6 in opposite directions. The narrow edges 6 of the stays 6 point again towards the surface area of the lap carrier.

Referring now again to the drawing and in particular to FIGS. 5 and 6 of the drawings, the lap carrier of this embodiment has again end rings 1 and 2 and ring like closed stays 8. The part-sections 8' and 8" form thereby substantially the bending places. Again a plurality of intermediate rings 4' are provided and as stated before, the end rings 1 and 2. The stays 8 disposed between the rings 1 and 4' are disposed set off to the stays 8 arranged therebelow between two intermediate rings 4 etc. The narrow edges 8 of the stays 8 point again towards the surface area of the lap carrier.

Referring now to the embodiment disclosed in FIGS. 7 and 8, the stays 9 of the lap carrier are of S-shape. The end sections of these S-shaped stays, which are disposed about parallel to each other, sit on the intermediate rings 4' and the end rings 1 and 2, respectively. The part- sections 9 and 9", extending inclined to the longitudinal axis xx of the lap carrier, permit the elastic bending of the stays 9. The narrow edges 9" of the stays 9 point towards the surface area of the lap carrier.

Referring now to the embodiment disclosed in FIGS. 9 and 10, the stays 10 of the lap carrier comprise about U-shaped frames. The part sections 10 and 10'', extending inclined to the longitudinal axis x-x of the lap rial strength. This prevents, that, primarily in the starting.

ranges of the compression of the lap carrier, yarn layers enter the split 23 and are clamped in those ranges. The narrow edges of the frame-like stays 11} point towards the surface area of the lap carrier.

Referring now to FIGS. 11 and 12 of the drawings, the embodiment disclosed therein is similar to that of FIGS. 9 and 10, but the material sections 11 and 12' are wider, so that practically the entire stabilized frame ends 13 and 14' are connected with the intermediate rings 4' and the end rings 1 and 2, respectively, in a stabilizing manner.

Referring now to FIGS. 13 to 16 of the drawings, wherein the entire lap carrier is produced integrally of suitable material in an injection molding process for synthetic material, the stays 15 are of V-shape. The ends of the V-legs 15' and 15" extend over light material enlargements 16 to the rings 4 as well as 1 and 2, respectively.

The apex zones 17 of all stays 15 disposed in the same cross-sectional plane are connected with each other by means of a stabilization ring 18 formed integrally therewith.

The inner face 18 of the stabilization ring 18 has a thinned cross-section relative to the end rings 1 and 2 and also relative to the intermediate rings 4. It is set off inwardly relative to the outer narrow edge 21 of the stays 15 defining the surface area for the length y and is flush with the inner edge of the stays and with the inner edges of the end and intermediate rings.

The wide face 22 of each pair of adjacent stays 15 is alternately directed in radial direction R of the lap carrier and inclined to the radial direction R in the adjacent stay 15, which inclination to the radial direction R results in an arrangement in which the wide face 22 of each second stay 15 disposed in the same cross-sectional plane, is directed along the line L which crosses the radial direction R at an angle 6.

We claim:

1. A lap carrier resiliently compressible in axial direction and defining a surface area, comprising end rings,

at least one intermediate ring,

a plurality of carrier elements disposed between said end rings,

said carrier elements comprise elastically bendable stays equally distributed along the periphery of said lap carrier and being inclined for at least a part of their length to the longitudinal axis of the lap carrier,

5 said stays having outer edges oriented toward the surface area of said lap carrier, and

said stays being rigidly secured to said rings.

2. The lap carrier, as set forth in claim 1, wherein said outer edges of said stays constitute narrow edges.

3. The lap carrier, as set forth in claim 1, which includes a plurality of superposed intermediate rings disposed concentrically relative to each other and connected together by said stays.

4. The lap carrier, as set forth in claim 1, wherein each of said stays has a buckling-bending point.

5. The lap carrier, as set forth in claim 1, wherein said stays comprise closed ring and define part-sections which define a bending zone.

6. The lap carrier, as set forth in claim 1, wherein said stays are of S-shape.

7. The lap carrier, as set forth in claim 1, wherein said stays comprise U-shaped frames which have sections directed outwardly from the ends of said frames and are connected with said rings.

8. The lap carrier, as set forth in claim 1, wherein said stays have apex zones and which includes a stabilization ring of substantially the same material as that of said stays and connecting said apex zones of all said stays disposed in the same cross-sectional plane.

9. The lap carrier, as set forth in claim 8, wherein said stays are of V-shape,

the outer narrow edges of said stays defines the outer surface area, and

said stabilization ring is set off inwardly relative to said outer narrow edge of said stays and has a thinned cross-section relative to said rings,

10. The lap carrier, as set forth in claim 8, wherein the inner face of said stabilization ring is flush with the 40 inner face of said stays and with the inner face of said rings.

11. The lap carrier, as set forth in claim 1, wherein each of said stays has a wide face, and the wide faces of each pair of adjacent stays disposed in the same cross-sectional plane is directed alternately radially and inclined to the radial direction, respectively.

References Cited UNITED STATES PATENTS 2,818,222 12/1957 Scholl 242-118.11 2,844,333 7/1958 Davidson 242-11811 GEORGE F. MAUTZ, Primary Examiner UNITED STATES PATENT OFFICE (.IER'FIPHTAIEC (H CORRECTION Patent fin. 3, 98 Dated Segtember 9, 1969 Inventorhfl RD TIGGES and WALTER HENNING In the heading of the patent specification, lines 5 and 6,

for "Cronenberg, Germany, and Walter Henning, 5113 Haomann-Lonssh 1, Hoengen, Germany" read Cronenbe rg, Germany, and Walter Henning, He rmann-Lbnestr. 1, 5113 Hoengen, Germany Signed and sealed this 4th day of August 9 70.

Atteat:

IHEDIAK E. 'SGPRJYIIER, JR. mm Fletch commissioner of Patents Attesting Officer

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