US2671332A - Yarn package support - Google Patents

Description

March 9, 1954 E. F. zmee YARN PACKAGE SUPPORT 2 Sheets-Sheet 1 Filed April 2, 1951 R W W W.

E 2 9} go/WWW Mara} 9, 1954 F, Z G 2,671,332

YARN PACKAGE SUPPORT Filed April 2, 1951 2 Sheets-Sheet 2 INVENTOR. 27 7 R 2131]} A TTOR/VE'Y Patented Mar. 9, 1954 2,671,332 YARN PACKAGE siJPPoRT Emil Friedrich Zingg, Heerbrugg-Widnau, Berneck, Gempern, Switzerland, assignor to Soisse, Emmenbrucke, Switcit de la Viscose Su zerland Application April 2, 1951, Serial No.g18,'747

Claims priority, application Switzerland vDecember 5, 1950 h 2 Claims. (01. simmer r, l r

This invention relates to yarn package supportsand more particularly to a device adapted to. support a yarn package, such as a cake of regenerated cellulose, during liquid treatment wherein the processing liquid is forced through the winding under pressure.

An object is to provide a device of the above type which eliminates defects of previous devices such as forming creases in the windings and reduces the time required for the treatment.

Another object is to provide a device of the above type having novel and improved characteristics.

Various other objects and advantages will be apparent as the nature of the invention is more fully disclosed.

The present invention provides for the treatment of unsupported yarn windings, in particular of untwisted rayon and permits systematic treatment of large unsupported yarn windings. It is characterized in that perforated expanding cylinders of a material not attacked by the processing liquids or by sulfur compounds are used to support otherwise unsupported yarn windings, with or without free axial expansion, which are flushed with processing liquids forced from the inside out, the flow being permitted to emerge both from the outer surface of the cylinder and on the two faces of the winding, its pressure effecting the axial expansion of the Windings. The perforated expanding cylinder is pressed against the inside of the yarn Winding during treatment, by the pressurized flow. Uniform pressure distribution of liquid is maintained over the entire surface of the cylinder and the amount of waste processing liquid is reduced to a minimum.

In one embodiment a support carries a perforated expanding cylinder which is in sealed connection with the support during treatment, the outside of such cylinder supporting the yarn winding to be treated and the inside being connected to a pressure line to supply the processing liquid.

The supportm'ay advantageously serve also for distribution of the liquor, and is accordingly perforated. In the interior of the perforated cylinder there is aperforated liner to reduce waste of liquor, resting on a base plate and surmounted by a washer, connected in turn by interchangeable spacer bushings with a conveniently attachable top plate. The latter represents the uppermost outside limit of the perforated cylinder, and at the same time the upper facial limitation of the yarn winding.

Greater or lesser vertical height of the bushings serves to restrict axialexpansion of the windings to various extents, so that for each type of Winding, the most economical balance between. consumption of liquor and processing effect can be obtained. The type of winding, dimensions of perforations and amount of liquid pressure afford further possibilities of varying this equij-j librium. The cylinder may comprise a, cylindrically curved perforated sheet of flexible stainless steel with side edges overlapping and adapted to expand radially under the pressure of the processing liquor, the overlapping edges being forced tightly together asthis expansion is eX.

ternally limited by the windings. Annular Washers of inside diameter such as to remain greater than the inside diameter of the windings during treatment at maximum pressure have their perforated faces covering the yarn wind ing-s to be treated. The end washers are fixed to the supporting column and to the liner dur ing treatment by means of spacers and a quicklocking device, whilethe center washer is free to slide axially on the elastic cylinder to permit axial expansion of the lower winding during treatment. The frontal seal between support, liner and perforated cylinder may advantageously be secured by means of rubber or other deformable packing, pressed into suitable recesses by the pressure of the processing liquids from the inside against the perforated cylinder and the sides of the recesses in the support and liner. To prolong the life of these packings, helical steel springs may advantageously be vulcanized there- Another embodiment confines itself to sealing the perforated expanding cylinder to the end washers, the latter being fitted on the inside with cemented gaskets of elastic material, e. g. rubber, against which the cylinders are expanded by the pressure of the processing liquids.

By suitable design of the perforations and/or shape of the liner and/or liquid supply line, a uniform distribution of liquid pressure along the surface of the jacket can be obtained. In addition, the perforations are of such size as to apply the maximum liquid pressure to the gaskets, while the jacket surfaces are under lower pressure, to ensure complete outward seal of the support.

Of course, all parts of the equipment described ing the present process will be explained in terms of the accompanying drawings wherein:

Fig. 1 is a vertical section through a processing column embodying the invention; and

Fig. 2 is a diagrammatic view of equipment for processing a bank of unsupported yarn windings with liquids under pressure.

The processing column shown in Fig. 1 comprises a central pressure tube I, provided with holes 2 and rigidly connected to base plate 3. and pedestal 4. A liner 5, provided with alarge number of perforations of smaller diameter 6 and a certain number of perforations of larger diameter I communicating with recesses 8, is disposed around the tube I. 9, such as rubber, fit into the recesses 8. A

washer ID is attached to a pin 20 which is car-x ried in the end of tube I and serves to hold the liner 5 and also the upper packing ring 9 in' position. A cylinder I I of flexible stainless steel havingperforations IIa' is disposed around the liner Sand sealed by the packing ring 9. The

cylinder II is split as indicated at IIb so as to beexpandible. A top plate I3 is attached with wing nut I2 to pin 20 with spacer I9 and lock nut I201. The top plate I3 is formed with a depending skirt 2I having a flared flange 22, with perforations 22a, adjacent to the top of yarn winding I6. flared flange I5, with perforations I5a, rests freely on base 3.

For treatment, unsupported yarn windings I6 withorwithout protective covering of fabric are mounted from above on perforatedcylinder II. Thebottom winding rests on flange I5. A separate sleeve 24 having flanges I4 separates the windings. The top winding I6 is surmounted by flange 22 of the top plate I3 and is fixed in placewith wing nut I2. It is essential that the flange 22 and the top winding I6 have a certain clearance I'I between them.

If the processing liquid under pressure is introduced through the central tube I into the processing column, then, with some slight pressure drop, theliquid will flow into the recesses 8 andpress packing rings 9 against perforated cylinder I I, thereby sealing the cylindrical spaces I8'between liner 5, perforated cylinder II, and yarn windings I6 at both ends. At the same time-the processing liquid flows, with somewhat greater pressure drop, through the smaller perforations 6; enters the aforesaid cylindrical spaces I8, thereby pressing the split cylinder II- against the windings, penetrates through the perforated cylinder I I into the yarn windings I6,-

and emerges on the outside of the windings, then either being drained off or being recirculated as in Fig. 2. As the liquid penetrates into windings IS, the latter tend to expand axially. They can so expand axially into the available free space H, being freely movable from below, together with the center spacer 24 upon the perforated cylinder.

The equipment shown in Fig. 2 consists of processing-columns 3I carried in trough 32 with a hood 33 provided for removalof noxious gases or for recovery of vaporized materials through a duct 34. The liquid emerging from windings I6 is carried to a receiving tank 26 by a return line 25, the former likewise serving for separation of incidental impurities. A pump 2Iis at- Elastic packing rings A lower sleeve 23- having a tached to this tank 26, and forces the processing liquid, after concentration, if necessary, through the pressure line 28, through suitable pressure filters if needed, and back into the processing columns 3|.

It is evident that the split cylinders I I is forced against the inner periphery of the windings IE by the pressure of the treating liquid from the pipe I and is sealed by packing rings 8 so that all of the liquid is forced to pass through the windingsIB. The perforated flanges I5, I4 and 22 allow liquid to flow out of the ends of the windings. Hence all parts thereof are equally and uniformly treated. The cylinder II conforms to any radial expansion of the windings and the space I! allows a limited axial expansion under the influence of the treating liquid.

What is claimed is:

1. An apparatus for supporting yarn packages for processing, comprising a fixed cylindrical support having an axial bore and radial passages" communicating therewith through which processing liquid is adapted-to flow, a base plate projecting radially beyond said support, an expansible-split perforated cylinder disposed on said base plate around said support-and spaced there-- from to provide an annular passage therebetween and adapted to carry a series of windings arranged in a'column around said split cylinder for processing, a bottomring disposed on said base plate around said split cylinder and having a flange shaped to support the bottom of the lower winding of said column, a spacing ring sliding on said split cylinder having flanges shaped to space and support successive windings, a fixed top ring around said split cylinder havinga flange initially spaced fromthe top of the upper winding of the column, elastic packing rings carried by said support in alignment with said bottom, top and spacing ring and sealing said'support to said split cylinder to close said annular passage at the top and bottom of each winding, said split cylinder and said packing rings being adapted'to be expanded radially under the pressure of the processing liquid. from said' axial bore to engage the inner periphery of said windings, said spacing rings sliding on saidsplit cylinder to allow said windings to swell and elongate axially, until the upper winding is brought into sealing contact with the flange of said fixed top ring, whereby the processing liquid from said support is confined to the windings.

2..An apparatus, as set forth in claim 1, in which said split cylinder is formed of a stainless steel sheet with overlapping longitudinal edges,

which are adapted to be sealed together by the pressure of the processing liquid.

EMIL FRIEDRICH ZINGG.

References Cited in the file of this patent UNITED STATES. PATENTS

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