USRE11620E - piceni - Google Patents

Description

passing air through-the same. The material fective and yet simpler and more econ om-ical,

UNITED STATES PATENT ,OFFIQE.

PROCESS OF 'ANDAPPARATU'S FOR DYEING.

SPECIFICATION forming part of Reissued Letters Patent No. 1 1,620, dated July 18, 1897.

Original No. 570,316, dated October 27,1896. Application for reissue filed April 8,

No. 245,234, and June 11, 1895, No.

February 19, 1895,

To aZZ whom it may concern: I

Be it known that we, LEOPOLD LE BLOIS and GAETAN PICENI,'citizens of the Republie of France, residing at Elbeuf, St; Aubin, Seine-lnfrieure, France, have invented a Method of and Apparatus for Bleaching or 'Dyeing Textile and other Materials, (for which Letters Patent have been granted in France, N 0. 245,234, dated February 19, 1895, and No. 248,077, dated June 11, 1895,, and in Belgium, No. 116,735, dated July 29, 1895,) of which the following is'a specification.

Our invention consists of improvements in the method and apparatus which form the subject of LettersPa-tent No. 489,819, dated January 10,1893, relating to the bleaching and dyeing .of cotton and other textile materials, the main object of the present invention being to simplify both the process and the apparatus and to make the process much more rapid and economical.

In the above-mentioned Letters Patent it was explained that the previously-employedboiling of the fibers under pressure and heat was to be replaced by simple impregnation 'y means of a bath, below the normal boilingpointof water, in a closed vessel, alternately creating a partial vacuum over the bath and thus impregnated was to be removed from the ,vat and placed in a dipping-wheel in a separate vessel and there submitted to the successiveoperations of bleaching or dyeing and washing. r,

To render; the operation more rapid and efwe have modified the process, as will be hereinafter described, andwe carry dutall the, steps of the operation in one apparatus constructed for thepurpose. In 'this way we do away with the labor, delay,and inconvenience of transferring the material .from one apparatus to another. Y

In the accompanying drawings, Figure 1 is a vertical section of the apparatus. Fig. 2 is an end elevation showing one-half in section, and Figs. 3 and 4 are perspective views of different forms of receptacle which may be employed to receive'and hold the material to be treated.

The apparatus consists, essentially, of an 1897. 'Serial No.631,330. Patentedin'I'rant-e 248,077, andin Belgium July 29,1895,No.l16,735.

air-tight vat A, preferably cylindrical, as

shown in the drawings, and built to resist 'ings at opposite ends of this vat there is.

mounted a central horizontal shaft L, carrying Within the vat one or more wheels, C0111. posed in effect of radially-arranged perforated receptacles K K. At one end of the vat the shaft L passes out through a stuflingbox E and has a further bearing in a suitable framework, which also carries the drivinggear M. This latter should beso constructed that the shaft mayat' will be driven ineither direction.

Suitable openings, closedby provided in opposite sides of the vat A, these openings being of suitable dimensions for the convenient insertion and withdrawal of the fibrous material to be treated or the box containing the same. The covers Q may be closed air-tight by rubber packing. The fibrous material to be treated may be laid in open boxes, such as illustrated in Fig. 3-, for instance, to be slid into place in the receptacles K through the. openings, whichare at other times closed by the doors Q. The shaft L, with its receptacles, is turned to bring the receptacles successively opposite the openings. The boxes 0 are held in place inthe receptacles by spring-catches O or othenmeans, engaging with suitable catches in the receptacles K: The shape of these boxes may vary, as also their perforations, but we prefer the rectam ,gnlar shape shown. They can be made with one or several compartments, according to the materials to be treated. In some cases the boxes 0 may be dispensed with and the perforated receptacles K may be provided with hinged doors 70, as indicated inlFig. 4.

In this case the fibrous material is put into the receptacles K or-withdrawn' therefrom by the opening and hinged door it.

The upper part of the closed vided with a valved pipe. A to be connected to a vacuum-pum p. The vat also has valved pipes V and V, used for admitting air into the bottom of the vat when it is'desired to let vat A is proair enter through the vat and the materials therein under the vacuum which has been created. These pipes may also be adapted to be connected instead to a steam-boiler to sup ply heat to the bath during treatment when required, or the heat-may be supplied by admittin g the steam into the liquid bath through a perforated pipe extending into the bottom of the vat or by circulation of the steam through closed piping in the vat.

"Valved pipes B and B are connected to a rotary pump P,-placed outside the vat, Fig. 1!

- These pipes open into the yat at different points," so that 'Wh'e'nthe' pump P is put in operation the liquid bath in the vat may be caused to continuously circulate through the material to be treated. The vat is also provided with a vacuum-gage F, a thermometer T, water-gage I, and an air-cock It.

To the opposite ends of the vessel or vat are connected valved pipes 11-11, which are adapted to be connected to an outside tank 'or tanks in which the difierent baths are be attained, it is not necessary to use all the prepared. At one end ofthe lower part of the vat is provided a valved discharge-pipe C, by whichthe spent liquid contents of the bath may be discharged. q

The apparatus and its parts may vary in size and shape according to the nature, con dition, and quantities of the material to be treated at one operation.

\Ve will now describe our process as carried out in the apparatus which we have set forth,

premisingthatinsoma eases, depending on the materials to be t-reatedand the results to steps described, Y

The perforatedreceptacles forming the wheel or wheels on the shaft L having been filled with the material to be treated, the

doors Q are put in place and hermetically sealed, and the apparatus is otherwise hermetically closed-and the shaft carrying the receptacles is put in motion. Then a partial vacuum is created in the Vat by opening the valve in the pipe A, which is connected to .the vacuum-pump, and the pipes 11H are put in communication with the outside tank or tanks containing the impregnating-bath.

In a few minutes a suitable vacuum is created,

and the valvesin the pipes ,H H being opened the bath will rise in the vat until the proper level has been reached, when connection with the outside tank or tanks is cut off. The

pipes V and V are then opened tothe atmosphere. Under the vacuum created air rushes into the vat and rises through the liquid,

agitating it. The valves in the pipes V and V are closed and againa partial va'cuum'is vformed. During all the time theimpregnation is taking place these alternate periods of partial vacuum and admission of air are continued, so that the violent agitation resulting greatly facilitates the thorough impregnation of the material.

tinuous circulation of the bath will be secured Where the nature of the ma- .terial to be treated makes it desirable, a conduring the above described operation by opening thevalves in the pipes B B'and starting the pump P. This circulation is used where the resistance of the materials to impregnation requires it, as Where more or less twisted yarns are to be treated, since such yarns offer greater resistance to impregnation than carded or combed textile material.- When theimpregnation is completed, the vacuum-p11 mp and the bath-circulatin g pump are stopped,-'but the shaft L may continue to rotate. The air-valve R is now opened and the valves in the pipes 13 and B closed, as are also thevalvesiu the pipes ll 1-1. If the impregnating-bath cannot be used again, it may be discharged through the pipe 0. If it can be used again, itniay be conveyed back to the tanks. -The vat having now been emptied of its liquid contents, the valved pipes H H are connected with that outside tank which con- L may be kept revolving. The valve in pipe A, connected to the vacuum-pump, is opened after the air-valve has been closed and the vacuum-pump is started. A partial vacuum being thus formed, the valves in the pipes H H'F-are opened and the dyeing or bleaching liquid rises in the vat until the required level is reached, when the valves in H H are closed. Then the'pipes V and V are opened to the atmosphere and the alternate admission of air and creation of partial vacuum are repeated, as before described, The circulating- Punlnli hebmnghtinw nserasin. .the

bleaching liquid through the material to be treated.

'When' the'material has been bleached or dyed, the rotation of the wheels may be stopped, as well asthe operation of the vacuum and circulatingpumps, and all the valves may be closed except'those throughvwhich the liquid is to be. drawn 'ofi, air being admitted through the valve R to permit this.

When it is necessary to wash the material "D and D, in communication with" a -water-. supply, are opened and the valve inthe out. let-pipe Q is opened; so that a current ofzwa- When shades or colorsare to be produced has to be drawn 'ofit', andby means of the vacuum-pump a. c'urrent'of air is caused to pass through the vat, entering at the bottom ing this time is put inmotion, so as to get a complete oxidation of the material in a very short time compared with that usually found necessary for oxidation-in the open air.

Weclaim as our inventionc 1. In the process of bleaching or dyeing tex tains the bleaching or dyeingbath. The shaft k ter may pass through the vat, all the other through the pipes V and V. The shaft .dur-

after bleaching ordyeing, the valves inpipes;

preceding case, to circulate .the dyeing or I'go which have to be oxidized by air, the bath tile and otherinaterialathe method consisting in rotating the material through the bleaching or dyeing bath and creating a partial'vacuum above the bath and alternately passing air through it.

2. In the process of bleaching or dyeing textile and other materials, the method consisting in rotating the materials through the bath and at the same time creating a rapid and continuous circulation of the bath through the material, creating a partial vacuum above the bath and alternately passing air through it, substantially as described.

t. An apparatus for bleaching or dyeing textile and other materials comprising a closed vat having at its upper part a valved pipe adapted to be connected with a vacuumpump and at its lower part a valved pipe or pipes adapted to be opened to the air, with a rotary wheel or wheels within the vat provided with receptacles for containing the in aterial to be treated and piping connected to diiferent parts of the vat and to a pump whereby the liquid in the vat maybe caused to circulate, substantially as described.

In testimony whereof we have signed our names to this specification in the presence of two subscribing witnesses.

LEQPOLD LE BLOIS.

, GAETAN PICENI.

Vitnesses: v

SARAH Z. BIGELOW, DUOLOS.

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