US3013422A

US3013422A - Dye kettle

Info

Publication number: US3013422A
Application number: US558650A
Authority: US
Inventors: Jr Charles H Amidon; Mortimer G Hopkins
Original assignee: Rodney Hunt Machine Co
Current assignee: Rodney Hunt Machine Co
Priority date: 1956-01-12
Filing date: 1956-01-12
Publication date: 1961-12-19
Anticipated expiration: 1978-12-19

Description

Dec. 19, 1961 c. H. AMIDON, JR, ETA]. 3,013,422

DYE KETTLE 5 Sheets-Sheet 1 Filed Jan. 12, 1956 @Pv 01 W. m fa A Mm r; H mm vi 4" M m j i 1961 c. H. AMIDON, JR, ETA]. 3,013,422

DYE KETTLE Filed Jan. 12, 1956 5 Sheets-Sheet 2 INVENTOR 674K265 A 141/004! 7:

ATTORNEYS 1961 c. H. AMIDON, JR., ETAL 3,013,422

DYE KETTLE 3 Sheets-Sheet 3 Filed Jan. 12, 1956 INVENTOR Camus A! A wow, fe.

ATTORNEXS 3,013,422. Patented Dec. 19, 1961 3,013,422 DYE KETTLE Charles H. Ainidon, Jr., Orange, Mass, and Mortimer G. Hopkins, Merchantville, N.J., assignors to Rodney Hunt Machine Company, Grange, Mass, a corporation of Massachusetts Filed Jan, 12, 1956, Ser. No. 553,650 8 Claims. (Cl. 68-18) This invention relates to apparatus for treating textiles and more particularly relates to apparatus for dyeing carpets.

The dyeing of fabrics and carpets is usually carried out by repeatedly passing the fabric or carpet through a liquid dye bath for a period of time that is sufficient to secure the proper density or depth of color. This type of fabric is processed in the open width, even'as wide as 18 ft., and usually has lengths in the range of 100 to 150 yds. After this length of the fabric is loaded in the dye kettle, the ends are temporarily sewed together and thus becomes an endless loop of material. This loop rides on a rotating reel which provides a folding and piling of the material in loose folds in the back of the dye kettle tub, in which it is subjected to the action of the dye liquors and then is drawn out of the dye liquors at the front of the tub. This passage of the material through the dye liquor is continued for a number of hours, until the proper penetration of dye is obtained. At that time when the dyeing process is completed, the remaining dye liquors are wasted, the goods are rinsed of superfluous dye, the sewed ends are cut apart, and fabric is removed from the dye kettle.

These dyeing processes are most effectively carried out at a temperature at or near the boiling point of water and the efiicacy of the dye bath depends upon the maintenance of a relatively uniform temperature through the entire bath. In order to secure uniform dyeing it is also essential that the concentration of dye in the dye liquor itself be maintained substantially uniform throughout the tub, even though new dye is added from time to time to attain the proper shade on the carpet. Relatively minor variations of temperature or concentration of the dye liquor throughout the bath may produce variations in the final shade of the material and may result in uneven dyeing and render the material unsuitable for commercial use.

For many years the art has sought to provide dye kettles and dye becks which would establish and maintain uniform conditions of temperature and dye concerttration. Most of these prior kettles and dye becks, however, have had deficiencies and defects and were not capable of maintaining uniformity of conditions to produce accurate shades of dyeing.

In many of these prior dye becks or kettles steam has been used to maintain the temperature and this steam is injected adjacent the front of the tub. This effectively maintains the temperature adjacent the point of injection, but the tubs are usually of fairly large size and there is a substantial temperature drop toward the back of the tub.

In application Serial No. 198,422, filed November 30, 1950, and now U.S. Patent No. 2,706,391, there is disclosed a dye kettle having a curved bottom with a curved false bottom or baffle mounted thereabove and having perforate sections at the center and near the upper edges thereof. Heat and/or steam is introduced into the space between the two bottoms to cause a circulation of the dye liquor through the perforate portions of the false bottom to establish a figure 8 flow of dye liquor in the tub. It is found that this flow is indispensible to maintain both a uniform temperature and a uniform concentration of dye liquor throughout the tub so that uniform dyeing can be accomplished. 1

We have now found that in dyeing tufted carpet having a heavy pile, especially where such carpet is relatively wide, i.e., in the neighborhood of twelve to eighteen feet, additional precautions must be taken to obtain an even dyeing. In dye kettles of the type disclosed in Patent No. 2,706,391, the carpet forms a dense accumulation of folds and layers in the dye liquors obstructing the figure 8 circulation at the center, while the dye liquor circulates freely at the ends of the carpet since there is always a space between the carpet selvedge and the end of the tub. This impeded circulation at the center of the tub results in a lower temperature and a lower concentration of dye of this central volume of dye liquor which results in a lighter pick-up of pigment or a starved condition of dyeing at the center areas, while the selvedges attain the full depth of shade.

We have found that this center-to-selvedge otfshading may be corrected and a uniform dyeing obtained if circulating pumps are connected to the dye kettle so as to remove dye liquor from the bottom center area of each tub end and deliver such liquor via recirculating lines to the center area of the machine above the folds of the carpet. The dye liquor recirculated in this manner displaces a volume of liquor at the center of the tub forcing it towards the ends of the tub and thereby creating a figure 8 circulation from the center to the ends of the tub as well as from the front and back to the center of the tub as taught in Patent No. 2,706,391. It is also a feature of the invention that steam may be introduced into the circulating pump lines so that the optimum temperature of the dye liquor may be obtained at the center of the tub where it was formerly at reduced temperature.

The perforated steam coils and dye distributor pipes at the front and rear of the tub between the false bottom or shell and the bottom are preferably of the T type with a center inlet and are of a length shorter than that of the tub. With this arrangement the heating effect and the addition of dye stuff is emphasized near the center of the carpet to favor that area where a full depth of shade is most difficult to attain. Since the steam coils terminate short of the ends of the tank and are of a length smaller than the width of the carpet being dyed, the figure 8 front to back circulation in the empty ends of the tub is reduced to a minimum so that a large amount of dye liquor does not circulate past the carpet selvedges.

A further major problem which has been encountered in the dyeing of carpets has been the accumulation of lint or tufts loosened from the carpet during the dye cycle. This material works its way below the false bottom or tub liner and accumulates on the pipe coils and lodges in circulation passages when the tub is drained. When cold water is added in the rinse cycle it causes a condensing effect in the steam coils which suck lint and tufts into the steam distribution holes in such a manner that it is extremely difficult to remove, and in some instances of operation it has been found necessary to remove the panels of the false bottom as often as once a week to clear away lint. This necesistates a complete shut-down of the machine and is time consuming and expensive.

Screens have been heretofore designed to catch and collect the lint as for example where they were placed at the intake of each circulating pump. With such an arrangement, however, recirculation ceases when the screen becomes clogged with lint and this causes the faulty dyeing of a complete load of 120 linear yards of carpet.

According to the present invention replacable screens are provided in a trough which is preferably located between the spreader and reel and above the dye liquor level. The recirculating pumps discharge through the screens into the trough and dye liquor flows by gravity through discharge ports at the center area of the trough. With this arrangement any severe clogging of the screens results in a mere overflow of the dye liquor back into the tub so that circulation is maintained and no damage is done to the carpet being treated. A duplicate screen is provided to quickly replace one that has an accumulation of lint and thus eliminates shut down of the machine.

It is accordingly a primary object of the present invention to provide an improved dyeing apparatus which assures the production of dyed goods of a uniformly high quality with greater speed, simplicity, and economy.

It is a further object of the invention to provide a dye kettle in which the circulation of dye liquid may be controlled and varied.

It is another object of the invention to provide a dye kettle in which the dye liquor may be established and maintained at a substantially uniform concentration throughout the kettle.

It is another object of the invention to provide a dye kettle in which the dye liquor may be maintained at a substantially uniform temperature throughout the dye kettle.

It is another object of the present invention to provide a dye kettle in which dye liquor is circulated within the kettle to establish a figure 8 circulation pattern from the front and back to the center of the tub, and in which dye liquor is further recirculated by pumps to establish a second figure 8 circulation pattern from the center of the tub to each end thereof.

It is a further object of the present invention to provide a dye kettle with provision for collecting and eliminating lint or tufts by means of screens so placed that a clogging thereof does not interfere with the circulation and recirculation in the dye kettle.

It is a further object of the present invention to provide a dye kettle having provision for the accumulation and removal of lint or tufts by means of removable screens which are easily accessible without any dismantling of the dyeing machine.

It is another object of the invention to provide a dye kettle having provision for the elimination of lint or tufts by means of removable screens which may be removed for cleaning while a duplicate screen is inserted to minimize production loss.

Further objects and advantages of the invention will become apparent upon reference to the appended specification, claims and drawings wherein:

FIGURE 1 is a side elevation of an apparatus embodying the invention partially cut away to show interior details of construction;

FIGURE 2 is front elevation of the URE l similarly cut away;

FIGURE 3 is an enlarged fragmentary elevation showing the operation of the dye injector;

FIGURE 4 is a fragmentary plan view of the dye injector taken on line 4-4 of FIGURE 3; and

FIGURE 5 is a vertical section of the central portion of a dye kettle showing another embodiment of the invention.

Referring now more particularly to the drawing, there is shown generally at 5 a dye kettle having spaced

vertical end walls

9 and 10, each having upper and lower longitudinally extending flanges 11 and 12. Extending between walls 9 and at their opposite upper ends are transverse apparatus of FIG- frame members 13 and 14. A curved bottom 15 is welded at its ends to members 13 and 14 and along its sides to

walls

9 and 10, defining with the latter a liquid tight tub or tank for dye liquor or the like. A battle or false bottom 16, of generally the same configuration as the dye kettle bottom 15, is removably attached to end

walls

9 and 10 and to the bottom member 15 with which it is in spaced substantially parallel relation. Perforated plates 17 and 13 are removably secured to the baflle 16 near the top of the tub and baffle 16 is also provided with perforations 19 at its lowermost portion. The plates 17 and 18 are secured in any suitable manner and may be removed for access to the pipes or coils between wall 15 and baflle 16.

At its lowermost portion, the bottom 15 is provided with a quick acting, gravity seated drain plug 20 which is opened by a lever 21, pivotally mounted on a bracket 22 secured to side wall 10. Lever 21 is actuated by a foot pedal 26 at the front of the dye kettle and is raised to its upper position by a spring 23. The lever 21 may be held in its depressed position by a bracket 25 having notches 24 in which the lever 21 engages.

Mounted by any suitable means, not shown, between bottom 15 and baflle 16 at an elevated position in the rear of the dye kettle 5 adjacent perforated plate 17 and baffie 16, is a heating coil 30 which is preferably closed and supplied with hot water or steam from any suitable source, not shown. A pair of heating coils 31 and 32 are similarly mounted between bottom 15 and bathe 16 adajcent the bottom of the kettle 5 opposite an imperforate section of baflle 16. Heating coils 31 and 32 are supplied with steam from any suitable source, not shown, and are provided with spray jets or openings, which expel the steam outwardly and upwardly between the bottom 15 and the baflie 16 as shown in FIGURE 1.

Centrally of curved bottom 15 and substantially centrally of transverse frame members 13 and 14 there is mounted by any suitable means, not shown, an elongated trough 34 having centrally located ports 36 in the sides thereof. Removable screens 38 are supported along the length of trough 34 by means of flanges 40, or other suitable means, for easy removal. The trough 34 extends substantially the full length of the dye kettle and is preferably located between the feed reel 128 and the spreader reel 112 just above the tub ledge, as shown in FIGURES 1 and 2.

Rigidly mounted on side wall 10 as by a strap 46 is a dye pail 48. A conduit 5% extends downward from the dye pail 4S and has an upper valve 52 and a lower valve 54. At its lower end, conduit 50 is connected with the interior of the dye kettle 5 between the bottom 15 and baffle 16 through a conduit 56. At a point intermediate of valves 5?. and 54, conduit 50 is connected to a conduit 58 through a horizontal conduit 60. Conduit 58 is connected to a coil 62, similar in construction to coils 31 and 32, positioned between baffle 16 and bottom 15 and provided with a plurality of spray openings 64 which are directed upwardly against the bottom 15.

Steam is supplied to the dye injector from a suitable source, not shown, through a conduit 66 controlled by a valve 68. As shown in FIGURES 3 and 4, steam conduit 66 is provided with an injection nozzle 70 which extends into the conduit 58. When steam is supplied to the nozzle 76, aspirating action entrains any surrounding fluid from pipe 60 causing it to flow into cell 62 after thorough mixing with the steam. As an indication of the flexibility of this dye injection system, it will be seen that, by opening

valves

52 and 68, a hot mixture of steam and dye is positively injected into the dye kettle regardless of the level or static head of the fluid in dye pail 4S. If

valves

52, 6S and 54 are all opened, a portion of the dye liquid is recirculated and thoroughly mixed with the steam and undiluted dye stuff from psi] 48. When only valves 54 and 63 are opened, the dye liquor is mixed with steam from the injector '70 and reintroduced through pipe 58. Plain steam may be injected by closing all valves except68. Further, at the completion of a dyeing operation, the pail 48 may be filled with clean water and the

valves

52 and 68 and, if desired, valve 54 opened for flushing out the entire system.

A recirculating pump 72 of any suitable type, such as for instance, a centrifugal type pump of stainless steel having modified impellers to pass lint and tufts and to operate at temperatures close to the boiling point, has its input connected by means of a conduit 78 and valve 80 to a discharge nozzle 82 mounted to discharge through screen 38 into trough 34. Provision may also be made for injecting steam into the output of pump 72 by means of a conduit 84 connected to conduit 78 through valve 86. A similar pump 88 has its input connected through a conduit 90 and valve 92 to the dye kettle between the bottom and baffie 16 at the end 9, and has its output connected through a conduit 94 and valve 96 to a discharge nozzle 98 discharging through screen 38 into trough 34. A steam line 100 is connected to conduit 94 through valve 192.

Each of the

pumps

72 and 88 takes dye liquor from the bottom center of the dye kettle between bottom 15 and baffle 16 and delivers this liquor to the trough 34 from which it discharges into the center of the kettle above the carpet. The warm dye liquor thus removed from adjacent the coils in the bottom of the kettle displaces a volume of cooler liquor at the center of the kettle forcing it towards the ends. This action causes the creation of a figure 8 circulation from the center to the ends of the kettle as shall presently be described in more detail. If further heating in the center of the kettle is desired steam may be introduced through

conduits

84 and 100. The injector 7t and recirculating pumps 72 and 83 lend considerable flexibility to the system and yield extremely satisfactory results when utilized in combination. Thus dye or brine may be added to the kettle either through the bottom dye distributor 62 or through the trough 34 or both. Steam may likewise be added either through the coils 31 and 32 or through the recirculation conduits 78 and 94 or both. Recirculation is entirely independent of the injector, of the heating, and of the normal circulation in the kettle. This versatility renders the kettle particularly advantageous in the tufted carpet industry where rapidly changing techniques and materials render such a versatility mandatory.

An upper housing indicated generally at 1&4 and consisting of a roof 106 and a pair of side walls 108 and 119 is removably attached to the dye kettle 5 by any suitable means, not shown.

A suitable feeding and plaiting mechanism such as the reel 128 having side flanges 114 is fixed on a shaft 116 within the housing MP4 above the rear end of the kettle 5. A variable speed motor 118 is mounted on a bracket 120 secured to the wall 9 and drives the sprocket 122 fixed on the shaft 116 through a speed reducer 124 and chain 126.

A spreader reel 112 is rotatably supported at its oppo site ends in a pair of journals, not shown, supported above the front end of the kettle 5. The cloth 139 to be treated is positioned over reel 128 and spreader 112, the slack portion being loosely supported in the dye liquor on the upper surface of baffle 16 as shown in FIGURE 1.

In operation, the dye kettle 5 is partially filled with heated water and, with

valves

52 and 68 opened and 54 closed, steam is supplied to injector 70 introducing dye stuff into the kettle. After the desired concentration is reached in the dye liquor, valve 52 is closed and valve 54 may be opened to recirculate the dye liquor through coil 62 to insure thorough mixing and to provide additional heating as required. Mixing and heating are also effected by the operation of coils 31 and 32. In addition to this,

valves

76, 80, 92 and 96 are also opened and circulating

pumps

72 and 88 are operated to provide recirculation of dye liquor from the lowermost outside porbafile 16 is such that the plaited cloth slides along the curved bafile toward the spreader 112 and the tension on the cloth between spreader 112 and the baffie 16 is thus minimized. The length of the portion of cloth under tension is also greatly decreased over that common in prior installations, allowing a greater proportion of the cloth to be submerged in the dye liquor, thereby materially increasing the speed of thedyeing operation.

As pointed out hereinbefore, the effectiveness of the dyeing operation is dependent upon fully controlled conditions of heat, homogeneity of dye liquor and thorough exposure of the cloth to the dye liquor. In the present apparatus, the application of heat is subject to rigorous control at five places in the dye kettle. The heating coils 3d, which'lie adjacent to perforations 1) in the battle 16 are used to control the heat of the liquor at the rear of the kettle 5 where the cloth enters the liquor and Where it has been found that the proper temperature should be maintained. The coil 31 may be employed to effect additional heating of the rearward part of the dye kettle, while coils 32 and 62 may be used to heat the forward portion of the kettle. In addition to this steam heating, recirculated dye liquor is introduced into the trough 34 and from there into the center of the kettle at the top thereof. Coils 31, .32 and 62, in addition, function as means for circulating the heated liquor through the cloth 'at three points, coil 31 directing the liquor rearwardly through the perforated area of plate 17 and the adjacent cloth and back through the cloth and perforated area 19 in the baffle 16, and coils 32 and 62 directing the fluid in an opposite symmetrical path through perforated areas of

plates

18 and 16. The circulation path is substantially a figure 8. Where dyeing tufted carpets having synthetic pile, such as rayon, nylon, etc., there is a tendency for the carpet to form a dense layer on the inner shell of the tub on the baffle 16 of the kettle, obstructing this figure S circulation at the center and causing a lower temperature of the central volume of dye liquor. The circulating pumps 72 and 88 correct this situation by withdrawing dye liquor from the bottom center of the tub at each end wall 9 and i0 and delivering this recirculated liquor to the center of the machine through the ports 36 in trough 34, thereby creating a further figure 8 circulation from the center to the ends of the tanks in addition to the figure 8 circulation to the center from the front and back of the kettle. It will be seen that by proper employment of coils 3t 31., 32, 62 and pumps '72 and 88 the temperature gradient throughout the dye kettle may be reduced to zero and may be kept at any desired level regardless of the particular material being fed through the machine.

Lint or tufts loosened from the backing of the material being dyed during the dye cycle passes through the circulating pumps 72 and 88 and is collected on removable screens 38 in trough 34 which are easily accessible and removable. In the event that the operator fails to clean the screens and they clog completely, the entire trough overflows back into the kettle so that recirculation is maintained.

While the embodiment of the invention shown in FIGURES 1 and 2 relies upon a pair of

pumps

72 and 88 for inducing the center to end figure 8 circulation, it is also contemplated that such a circulation may be induced by apparatus mounted within the dye kettle. Thus referring to FIGURE 5 there is shown the central portion of a dye kettle similar to that shown in FIGURES 1 and 2 and bearing similar reference numerals to indicate corresponding parts throughout.

In this embodiment of the invention the external pumps and recirculating lines are replaced by a pair of return chutes 150 and 152 which are mounted on the insides of the side walls 9 and 1% These chutes are connected at their upper ends to the bottom of a trough 154 having a plurality of screened outlets 156 located centrally of the dye kettle. A shaft 158 drives a pair of reversely mounted

screw thread conveyors

160 and 162 and is mounted in a pair of bearings 164 and 166. The left end of the shaft 158 is provided with a drive pulley 168 which may be driven by the motor 118, shown in FIGURE 2. The trough 154 is mounted with its bottom below the surface of the dye liquor so that rotation of the shaft 158 and screw

conveyors

160 and 162 causes a circulation of fluid from the trough ends to the trough center. The goods to be dyed are located in the area indicated by dot-dash line 1'70.

Circulation of dye is induced through the end chutes 150 and 152 by means of the action of the

screw thread conveyors

160 and 162, and the circulating dye liquors are returned to the central portion of the tub through the screened apertures 156. The desired figure 8 circulation is thus induced from the center of the dye kettle to

side walls

9 and 10, thence upward into the trough 154, and thence down through the apertures 156. A minimum amount of equipment is utilized and the drive for the screw thread conveyor may be very economically obtained from the same source of power normally present for driving the reel.

The invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description.

What is claimed and desired to be secured by United States Letters Patent is:

1. Apparatus for treating textiles comprising a tank for containing a treating fluid and having a curved member forming the bottom, front and rear walls thereof, end walls attached to said curved member, a second textile support member substantially parallel to said curved member, heating and circulating means for said fluid positioned between said curved member and said second member for producing upward flow of said fluid from the center of said tank toward said front wall, separate heating and circulating means for said fluid positioned between said curved member and said second member for producing an upward flow of said fluid from the center of said tank toward said rear wall, a trough mounted between and substantially parallel to said front and rear walls over said textile support member, said trough having ports located centrally thereof, including a conduit and means for withdrawing fluid from said tank proximate the bottom central area thereof at each end thereof and delivering said withdrawn fluid into said trough and thence through said ports back into the center of said tank.

2. Apparatus for treating textiles comprising a tank for containing a treating fluid and having a curved member forming the bottom, front and rear Walls thereof, end walls attached to said curved member, a second textile support member substantially parallel to said curved member, heating and circulating means for said fluid positioned between said curved member and said second member for producing upward flow of said fluid from the center of said tank toward said front wall, separate heating and circulating means for said fluid positioned between said curved member and said second member for producing an upward flow of said fluid from the center of said tank toward said rear wall, a trough mounted between and substantially parallel to said front and rear walls over said textile support member, said trough having ports located centrally thereof, a screen removably mounted across said trough, a first pump connected to one end of said tank near the bottom central area thereof for withdrawing fluid therefrom, conduit means connected to the discharge of said pump for delivering said withdrawn fluid through said screen into said tank for withdrawing fluid therefrom near the bottom central area thereof, and conduit means connected to the discharge of said second pump for delivering said withdrawn fluid through said screen into said trough.

3. Apparatus as set out in claim 2 including means for heating the discharge of said pumps.

4. Apparatus for treating textiles, comprising a tank for containing a treating fluid and having a curved member forming the bottom, front and rear walls thereof, end walls attached to said curved member, a second member substantially parallel to said curved member, means having a first axis for plaiting a textile onto said second member adjacent said rear wall, means having an axis spaced from and parallel to said first axis for moving said textile along a portion of said second member and removing it from said tank adjacent the front wall thereof, a trough mounted below and parallel to the axes of said means for plaiting and means for moving said textile, said trough having ports located centrally thereof, a screen removably mounted across said trough, heating and circulating means for said fluid positioned between said curved member and said second member for producing upward flow of said fluid from the center of said tank toward said front wall, separate heating and circulating means for said fluid positioned between said curved member and said second members for producing an upward flow of said fluid from the center of said tank toward said rear wall, a first pump connected to one end of said tank near the bottom central area thereof for withdrawing fluid therefrom, conduit means connected to the discharge of said pump for delivering said withdrawn fluid through said screen into said trough, a second pump connected to the other end of said tank near the bottom central area thereof for withdrawing fluid therefrom, and conduit means connected to the discharge of said second pump for delivering said withdrawn fluid through said screen into said trough..

5. Apparatus as set out in claim 4 including means for introducing a treating substance in said tank comprising: a container for said treating substance, a conduit connecting said container with said tank, an injector in said conduit, and means to introduce a heated fluid under pressure into said injector, whereby said treating substance is entrained and mixed with said fluid and injected into said tank under pressure.

6. Apparatus as set out in claim 5 together with a second conduit interconnecting the first conduit and said tank, adapted to permit recirculation of a portion of said treating fluid through said injector.

7. An apparatus as set out in claim 1 wherein said conduit is within said tank.

8. An apparatus as set out in claim 7 wherein said fluid withdrawing and delivering means comprises a pair of screw conveyors positioned in said trough.

References (Iited in the file of this patent UNITED STATES PATENTS (Other references on following page) Haeberlin Jan. 19, 1937 McClellan Oct. 18, 1938 Nichols Sept. 26, 1939 Milne Nov. 10, 1942 Hilliard Jan. "19, 1943 Bond May 11, 1948 Colley Sept. 13, 1949 10 DeMarco Apr. 27, 1954 Belcher Apr. 19, 1955 Newcomb May 3, 1955 FOREIGN PATENTS Italy June 18, 1953 Great Britain May 19, 1948 France June 21, 1950 UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION.

Patent. No 3,0l3 4.22 December l9 196 Charles H Amidoni Jr et al0 It is hereby certified that error appears in the above numbered pat ent requiring correction and that the said Letters Patent should read as corrected below Column l line 36 for "through" read throughout 3 column 2 line 59 for "suck" read sucks 3 column 8 line 10 for "tank for" read trough a second pump connected to the other end of Said tank for Signed and Sealed this 3rd day ofluly 19620 (SEAL) Attest:

ERNEST w. SWIDEE 7 DAVID A D Commissioner of Patent Attesting Officer