US827057A - Apparatus for cooling ore. - Google Patents

Apparatus for cooling ore. Download PDF

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US827057A
US827057A US18484603A US1903184846A US827057A US 827057 A US827057 A US 827057A US 18484603 A US18484603 A US 18484603A US 1903184846 A US1903184846 A US 1903184846A US 827057 A US827057 A US 827057A
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Prior art keywords
ore
conductor
hopper
water
pipe
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US18484603A
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David H Campbell
Thomas H Smith
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HENRY F CAMPBELL
JEANNETTE L CAMPBELL
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HENRY F CAMPBELL
JEANNETTE L CAMPBELL
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/56—Coatings, e.g. enameled or galvanised; Releasing, lubricating or separating agents
    • B29C33/68—Release sheets
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
    • C21D9/54—Furnaces for treating strips or wire
    • C21D9/56—Continuous furnaces for strip or wire
    • C21D9/573—Continuous furnaces for strip or wire with cooling
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S165/00—Heat exchange
    • Y10S165/225—Heat exchange with solid conveyor
    • Y10S165/226—Screw conveyor

Definitions

  • H. F. 61 D. H. GAMPBBLLKE T. J. L. OAMPBELLVBXEOUTRIX or 11. r. GAMPBELLDEOD APPARATUS FOR COOLING ORE.
  • FIG. 1 is a side elevation of the blower, hopper, and lower portion of the conductor and connections.
  • Fig. 2 is a side elevation of the upper portion of-the conductor, one of the dustchan. Jers, and a ertical section of the bin'on the line 2 2 of Fig. 9.
  • Fig. 3 is a vertical section of the hopper and conductor,
  • Fig. 41 a vertical section of the hopper and a portion of the conductor.
  • Fig. 5 is an enlarged longi tudinal section of a portion of the conductor and one of the water-jackets.
  • Fig. 6 is an enlarged view, partly in section, of the spraypipe and a portion of the conductor.
  • Fig. 7 1s a vertical section of the hopper, showing the conductor partly in section and partly in elevation.
  • Fig. 8 is a view, partiy in section and partly in elevation, of a modification of the conductor shown in Fig. 7.
  • Fig. 9 is a longitudinal section of the bin inclosing the-dustchambers, one of which is shown in section and the others in elevation.
  • 10 is a receivinghopper of any convenient sliapc and. of any suitable material.
  • the 11 represents metal covers hinged at 54 to the brackets 55, which are cast on the hopper.
  • the covers 11 cover tne top of the hopper and fit closely together in such a'mann'er as'to prevent dust and fumes from escaping.
  • Fig 1 having a horizontal metal late 68, Figs. 3, 4, and 7, fitted and adapte to slide therein to regulate the flow of the material from the hop or.
  • 13 is a con uctor consisting of an iron pipe of any convenient diameter and composed of any number of" sections having flanged ends bolted together in the usual manner.
  • blower 14 is a blower or fan of any suitable construction connected with the conductor 13 in such manner as to discharge an air-blast therein.
  • Fig. 6 we have provided the pipe 28 with a nozzle 60, haiing perforations 27 therein for the purpose of causing a spray of water to be dis ch rged into the ore.
  • the form of the stream injected into the conductoris not essential to our invention and. may be modified in various ways.
  • 59 is a branch of the conductor 1's and is screw-thrcaded on the inside to receive the screw-threaded end of the supply-pipe 28.
  • the pipe 28 is provided with the cook 29, having an index-pointer and a scale 61 to indicate the degree of opening of the pipe 28.
  • 14 and 15 are water-jackets surrounding and inclosing portions of the conductor 13, the details oi construction of the waterjacket 14 being shown in Fi 5.
  • 17 and 21 are nuts which constitute t 1e heads of the water-jacket 14 and are fitted to the screwthread upon the outside of the conductor 13. They are connected to the water-jacket 14 by means of the rings 16 and 20, which have in-v ternal screw-threads fitting the screw-tlu'eads Ice j upon the heads 17 21 and 'upon the ends of ductor for of the pipe in order that s y npinse. p air blast.
  • the Water-jackets 14 I Y nutsbetwee'n and the heads of the we.- torejacket'are Suitable packings '18 and 22, which serye to form Wateretight" joints. 24 isa supply-pi e, and 25 is a waste-pipe, for the water'-'ac et 14.
  • the water-cock 26 (shown in ig. latillg the sup ⁇ .acket. V
  • the conductor 13 discharges into a dustchamber 46. (Shown in Figs. 2 and 9.)
  • 63. is a metal sheet or plate immediately in front of the discharge end of the conductor fot the purpose of scattering the ore particles it by the force of the ly of water to the water- In dust-c racticc number of conductors and ambezts may be used and may be of any desired form.
  • a bin made of fire-clay or othernon combustible material and of any suitable shape, preferably rectangular in cross-section and, with one or more hopper-shaped bottoms, each oif'which is directly. beneath.
  • dust-chamber1 6 4. represents angle-irons secured to the inner, walls of the bin 45 and supporting one or more dust-chambers. 47 is 'aventilator at the top of said bin and is forthe purpose, ofpermi'tting the escape of gases and vapors collecting therein and may be provided with screens. to prevent losses by escape of dust.
  • 49 represents the inclined walls forming the hopper-shaped bottom, and-50., 51, and 52 the outlets of the bin through which the cooled ore is discharged.
  • a single dust-chamber may be, employed and inclosed in a bin adapted in size thereto, or the dust-chamber may be dispensed with and the conductor discharge directly into a bin.
  • the piece 57 of the con uctor 13 is a gooseneck or curved-section of pipe and bass intowhich is inserted and tightly fits the nozzle 31 of the blqwer l4.
  • the nozzle extends slightly beyond the throat of the hopper 10 into the conductor 13, so as to avoid. tendenc of the air-blast to cause, the ore to, be force back out of the hopper.
  • the noz 21c 31 is provided with a flange which is bolted t a an on e pi ef mie i iiitv of the usual construction.
  • conductor is contracted at 44 to about the diameter oi the nozzle 31, the effect of which istg. lncr ease the velocity of the air-blast at thatppint, producing a suction which overcomes any tendency A to escape through the hopper.
  • Fig. 8 a modification of Fig 2 is shewn by means of which the ore is conveyed ba, positive movement beyond thethroat oi hopper.
  • 41 is the nozzle of the blower rte sponding to 31 in Fig. 7.
  • i0. is 8, revolving sleeve bearing thereon the screw 42, and he:
  • the covets. 1 1 are opened so as to allow the admission gt a stream of ore of s ifiicient volume to keep the hopper. practically full.
  • the ore in a pulven ized and heated.
  • ductor now rise ztndpess oft thron tilator 47 in the top of the bin e doors may be raisedv or lowered and the discharge of the ore from the dnst-cheinhers reguleted.
  • the ore discharged from the dust chambers l' lls upon. the inclined 49 of the hopper-shaped bottom is finally delivered through the outlets e0, 51, end 52.
  • the epperstus enables us to elevate the ore in its transit and to'loctrte the bin at the most convenient point for the delivering of the ore into the sepztratinghmchines, if such be used. It also enables us to confine the ore while being cooled and delivered from the. to in tree to the seoerzt tingenaohine and there.- hy to avoid dusi and fumes which. are at times elmcmt suffocating; when the ore is exposed. loading; or .moving send or Iii our epn-ztrzttus espewort-ant sd'venn. by the airction. to its travel e minti uotor.
  • a conductor provided with a gooseneck at the receiving end, a, hopper arranged to discharge therein, a ILOZZifiBIItQIiZlg said gooseneck, means for discharging an air- IO blast into said conductor through said nozzle, said conductor having a contraction in THOMAS H VSMITH. its diameter at a point beyond-Where the air- witnesseses to signatures of Homy F. Campblast is discharged therein, and said conheiiamd Duvid .Csmpbell: ductor being expanded immediately beyond ELMER L. BRIGGS, [5 said contraction, combined with u W&i;61- CHAS. F. PERKINS. Fcket surrounding said conductor, means) Witnesses to signature of- Thomas .H.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)

Description

PATENTED JULY 24, 1906. H. SMITH.
H. F. 61: D. H. GAMPBBLLKE T. J. L. OAMPBELLVBXEOUTRIX or 11. r. GAMPBELLDEOD APPARATUS FOR COOLING ORE.
APPLICATION FILED 1730.11. 1908.
2 SHEBTSSHEBT 1.
- III'I Illll PATENTED JULY 24, 1906. & T. H. SMITH.
H. F. 6; D. H. CAMPBELL J. L. CAMPBELL. EXEGUTRIX OF H. P. CAMPBELL DEG'D.
APPARATUS FOR COOLING ORE.
APPLICATION FILED DEG.11. 1903. 2 SHEETS-SHEET 2.
IIIIIIIIIIII7IIIIIIII/ u v i 1 (I'll/11111113111111! UNITED PATENT OFFICE.
HENRY F. CAMPBELL, OF'MELROSE, MASSACHUSETTS, AND DAVID H. CAMPBELL AND THOMAS H. SMITH, OF DENVER, COLORADO: SAID DAVID. H. CAMPBELL AND EMITH ASS $5013.55 "OSAID HENRY F. CAMPBELL; JEANNETTE ii. CAMPBELL EXECUTRTX OF SAID HENRY F. CAMPBELL, DECEASED.
APPARATUS FORGOQLING ORE.
Specification of Letters Patent.
Patented July 24, 1906.
Ap li atiun on December 11,1903. Serial No. 184,846.
ing at Denver, in the county of Denver and State .of Colorado, citizens of the United. States, have invented new and useful Improvements in Apparatus for Cooling Ore, of which the following is a specification.
- Our invention relates to an apparatus for cooling, conveying, and elevating sand and light materials, and particularly ores preparatory to magnetically separating and concentrating same; and theobjects of our invention are to convey and elevate sand and like materials in a closed conductor and to convey heatedore directly from the furnace to elevated dust chambers and bins and to cool the same rapidly while in transit. We attain these objects by the means illustrated in the accompanying drawings, in which- Figure 1 is a side elevation of the blower, hopper, and lower portion of the conductor and connections. Fig. 2 is a side elevation of the upper portion of-the conductor, one of the dustchan. Jers, and a ertical section of the bin'on the line 2 2 of Fig. 9. Fig. 3 is a vertical section of the hopper and conductor,
showing in elevation a modification of the means or conveying the orc. Fig. 41s a vertical section of the hopper and a portion of the conductor. Fig. 5 is an enlarged longi tudinal section of a portion of the conductor and one of the water-jackets. Fig. 6 is an enlarged view, partly in section, of the spraypipe and a portion of the conductor. Fig. 7 1s a vertical section of the hopper, showing the conductor partly in section and partly in elevation. Fig. 8 is a view, partiy in section and partly in elevation, of a modification of the conductor shown in Fig. 7. Fig. 9 is a longitudinal section of the bin inclosing the-dustchambers, one of which is shown in section and the others in elevation.
Like numerals indicate corresponding parts throu hout all oi the figures oi the drawings.
Re erring to the drawings, 10 is a receivinghopper of any convenient sliapc and. of any suitable material.
11 represents metal covers hinged at 54 to the brackets 55, which are cast on the hopper. The covers 11 cover tne top of the hopper and fit closely together in such a'mann'er as'to prevent dust and fumes from escaping.
At the throat of the hopper is an opening 12, Fig 1 having a horizontal metal late 68, Figs. 3, 4, and 7, fitted and adapte to slide therein to regulate the flow of the material from the hop or.
13 is a con uctor consisting of an iron pipe of any convenient diameter and composed of any number of" sections having flanged ends bolted together in the usual manner.
14 is a blower or fan of any suitable construction connected with the conductor 13 in such manner as to discharge an air-blast therein.
28 is a supply-pipe for cold water for the purpose of injecting a stream of water directly into the heated contents oilthe conductor at 59. (See Figs. 1 and 7.) In Fig. 6 we have provided the pipe 28 with a nozzle 60, haiing perforations 27 therein for the purpose of causing a spray of water to be dis ch rged into the ore. The form of the stream injected into the conductoris not essential to our invention and. may be modified in various ways. a
59 is a branch of the conductor 1's and is screw-thrcaded on the inside to receive the screw-threaded end of the supply-pipe 28.
It is obvious that other methods of joining the various parts of the conductor and its connection than those shown and described may be employed without departing from the substance of the invention. It is only necessary that the joints shall be watertight.
The pipe 28 is provided with the cook 29, having an index-pointer and a scale 61 to indicate the degree of opening of the pipe 28.
14 and 15 are water-jackets surrounding and inclosing portions of the conductor 13, the details oi construction of the waterjacket 14 being shown in Fi 5. 17 and 21 are nuts which constitute t 1e heads of the water-jacket 14 and are fitted to the screwthread upon the outside of the conductor 13. They are connected to the water-jacket 14 by means of the rings 16 and 20, which have in-v ternal screw-threads fitting the screw-tlu'eads Ice j upon the heads 17 21 and 'upon the ends of ductor for of the pipe in order that s y npinse. p air blast.
the Water-jackets 14 I Y nutsbetwee'n and the heads of the we.- torejacket'are Suitable packings '18 and 22, which serye to form Wateretight" joints. 24 isa supply-pi e, and 25 is a waste-pipe, for the water'-'ac et 14. The water-cock 26 (shown in ig. latillg the sup {.acket. V
ars or nuts fitting the external screw-thread of the conductor 13. These nuts 32 and 33 serve. the-purpose of flanges upon the conunitin two sections of the conductor. The said nuts are bolted together in the ordinary manner of joining the flanges of two sections of pipe. It is necessary to' employ the said nuts instead of flanged ends they may be removed to allow the head 17 and the lock-nut- 19, 130 be first a plied to the conductor. 34 and35 are simi a1: screw-threaded collars or nuts used for the same purpose as 32 and 33.
The conductor 13 discharges into a dustchamber 46. (Shown in Figs. 2 and 9.)
63. is a metal sheet or plate immediately in front of the discharge end of the conductor fot the purpose of scattering the ore particles it by the force of the ly of water to the water- In dust-c racticc number of conductors and ambezts may be used and may be of any desired form.
, which serve to secure e3 hepresentsinclined urfaces for deflecting the ore through openings in the bottom Qt'thechambeif, which openings are provided with doors 65. 62 represents metal clips the doors 65 to the walls of the chamber and at the same time permit them to slide up and down. The size of. the said openings can thus be regulated by the adjustment of the doors 65.
is a bin made of fire-clay or othernon combustible material and of any suitable shape, preferably rectangular in cross-section and, with one or more hopper-shaped bottoms, each oif'which is directly. beneath. a
dust-chamber1 6 4. represents angle-irons secured to the inner, walls of the bin 45 and supporting one or more dust-chambers. 47 is 'aventilator at the top of said bin and is forthe purpose, ofpermi'tting the escape of gases and vapors collecting therein and may be provided with screens. to prevent losses by escape of dust.
49 represents the inclined walls forming the hopper-shaped bottom, and-50., 51, and 52 the outlets of the bin through which the cooled ore is discharged.
.It is evident that a single dust-chamber may be, employed and inclosed in a bin adapted in size thereto, or the dust-chamber may be dispensed with and the conductor discharge directly into a bin.
Inljig. 3 the blower. 14 is, dispensed with 2) is for the purpose ofregu- 32 an 33 are screw-threaded col- 19 and 23 are lockbearing thereon a screw blower 14 so as to create .ficient force and other means than anair-blast are shown for conveying the ore.
38, the whole being actuated by the pulley conductor 57 is closed by the cap fifi, bolted to the flange thereon. The openin in'the cap 66 through which the shaft ex ends is provided with a flanged bushin Water may be circulated through the s aft 69 to'aid in cooling" the ore.
Referring to Fig. 7, the piece 57 of the con uctor 13 is a gooseneck or curved-section of pipe and bass intowhich is inserted and tightly fits the nozzle 31 of the blqwer l4. The nozzle extends slightly beyond the throat of the hopper 10 into the conductor 13, so as to avoid. tendenc of the air-blast to cause, the ore to, be force back out of the hopper. The noz 21c 31 is provided with a flange which is bolted t a an on e pi ef mie i iiitv of the usual construction. conductor is contracted at 44 to about the diameter oi the nozzle 31, the effect of which istg. lncr ease the velocity of the air-blast at thatppint, producing a suction which overcomes any tendency A to escape through the hopper.
In Fig. 8 a modification of Fig 2 is shewn by means of which the ore is conveyed ba, positive movement beyond thethroat oi hopper. 41 is the nozzle of the blower rte sponding to 31 in Fig. 7. i0. is 8, revolving sleeve bearing thereon the screw 42, and he:
ing actuated by the pulley 39. 36 is a, nut in: head efl'ectually closing the space areund the nozzle 41 at this point. 43 is-a. contraction of the conductor corresponding tode inFig Z.
The method of operation 0 our. apparatu when used for conveying and cooling ore-is follows: Wye regulate the speed of: the-fan or; I a blplst. offiirhof. sufi o arr t 1e t -Qu t 90. .1- dllctQIf 13. We firiii ordinarily. tliit a fog i2": ounce current is sufficient. The covets. 1 1, are opened so as to allow the admission gt a stream of ore of s ifiicient volume to keep the hopper. practically full. The ore in a pulven: ized and heated. state is then delivered intg the hopper from, the furnace The tie dc.- scends from the hopper and enters the conductor. 13 in the path of the air-blast by which it is carried to the dust-chamberv 46 5 As the ore passes the point where, the pipe 28 the operator to regulate accurately the flow;
of water. through the pipe 28?. It is. unnecy emplo a arr y as th Wa erwtnins in ontact with the hot ore is almost ateiy converted into steam and is carried 69 isfa hollow shaft- 70'. The end of the branch cast integral therewith of the dust and fumes byte-W sh 1 The cock is provided. with charged by the conductor.
along with the ore perti' through the conductor, through the pipe 228 should that the quantity i no greet instantly converts to nrit the pertieles of ore to entc dry state and. not edl Fig. 7 We have shown? I. out it perforated nozzle Water to the ore. The-t ore is reduced by the we the pipe 28 end that-1h which is -liept cool hythe When the pas" 46, it strikes against t down on the inclines. so: v is deflected out through the the bottom. The gases and have come up with the ore three. ductor now rise ztndpess oft thron tilator 47 in the top of the bin e doors may be raisedv or lowered and the discharge of the ore from the dnst-cheinhers reguleted. The ore discharged from the dust chambers l' lls upon. the inclined 49 of the hopper-shaped bottom is finally delivered through the outlets e0, 51, end 52. When the supply of ore to the itiopper dis" continued, we find it desirable to close the covers 11, because there is e tendency the air-blast to expel the material from he hop perthrough its inlet ll the hop er is only partially filled. The consnyruetion shown in F i 3 could onl be em loved when the char l eater of the Work would permi the use of. s, straight conduetor. in such. instrtn ore can be conveyed. by so' l be cooled While heing convey erl devices and in the some described in connee In Fig. 7 the nozzle 3]. preys so the throat of the hopper that there is no tern ency to expel the ore or lumes out than the hopper l0. nozzle 31 is that the ore is all renio the hopper by gravity :i'nd suction This s further aided by the cont-motion conductor 13. By employing the construd tion shown in Fig 8 rinity and suction alone are not depended'upeu to liver ore in the path of the einblest; but spirel 4.2 insures a positive delivery oi the at the proper point to he ected upon. by air-blast to the best edvmitege.
While We have described our h rentlr with special 'rclfere ce to ores, we do not d sire to be undorstosgid z strictly to this clase of nutteri I include all pulverized marrow." of being conducted and e ner described. in the or apparatus described for to cooling devices may he d water-j ache ts here shown are oh n zisses throng]. the jacket hut. ii desired, it can in. a wet scpou 13 end. after the l ((}\l'1Efil-' (OOl it may he used over various sections of our Hli'l! o and "alter-tight l or for magnetic Sepa the ore qrfol ily furnace, its the we to heat must he accui order to get the best retion enables us to take the .ice into the hopper. es tl:-.e ore throu the conseeonde, subjecting itin its passage to direct contact with cold Water and to the cooling efiect oi. the Witter-jackets,- which may be arranged to incl ose so much of the conductor the constructor desires. The epperstus enables us to elevate the ore in its transit and to'loctrte the bin at the most convenient point for the delivering of the ore into the sepztratinghmchines, if such be used. It also enables us to confine the ore while being cooled and delivered from the. to in tree to the seoerzt tingenaohine and there.- hy to avoid dusi and fumes which. are at times elmcmt suffocating; when the ore is exposed. loading; or .moving send or Iii our epn-ztrzttus espewort-ant sd'venn. by the airction. to its travel e minti uotor.
.a en tippers For conveying endeoolhe eomhi nation of units each consist- .t central imminotol, it jeoket inolosing is for causing a cireuletion of tot, said central 0on- I consisting of a cylinder outs rornung needs thereof coner by annular screw-threeded 22,2 eppmfetus fo conveying and 0001* filll tfit lv, means for discharging i eondtmtor, means for its said oonduotor and the (llLMHBtQIthBlQOf the n'laterial is dis-- e, L id said conductor "3' beyond, said r water-jitcket r, means for onusrough said juket, .ip; of it cylinder and o heads thereof conead with conpeswm.
nested together hg endulmf sciew'threeded of, connected together .ennui ar screw- 20 rings; a feed-pipe iseharg'ing Waiter into-said" threaded rings, and a fee pipe discharging duetor, and providedwit stock sud in reguistin" and rcgistei' i in the Iiow of Water through t eseme.
, in testimony whereof we huvehereunto z 5 set our hands, in presenceoftwo subscribing i witnesses, this-18th day of Septemher',=1 903.
HENRY FCAMPBELL. DAVID H. CAMPBELL.
conductor, and means for regulating and. my water into said eon istering the supply of water therein.
In an apparatus for conveying and, cool-- ing ore a conductor provided with a gooseneck at the receiving end, a, hopper arranged to discharge therein, a ILOZZifiBIItQIiZlg said gooseneck, means for discharging an air- IO blast into said conductor through said nozzle, said conductor having a contraction in THOMAS H VSMITH. its diameter at a point beyond-Where the air- Witnesses to signatures of Homy F. Campblast is discharged therein, and said conheiiamd Duvid .Csmpbell: ductor being expanded immediately beyond ELMER L. BRIGGS, [5 said contraction, combined with u W&i;61- CHAS. F. PERKINS. Fcket surrounding said conductor, means) Witnesses to signature of- Thomas .H.
or causing-,9, circulation of water through Smith: said jacket; said jacket consisting of a cylin G. HOWARD SUNDLEY, der and circular nuts forming the headsthe1e-- MAY-ME A. MCDONALD.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5191910A (en) * 1990-11-14 1993-03-09 Eastman Kodak Company Method and apparatus for continuous liquefaction of gelled photographic materials

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5191910A (en) * 1990-11-14 1993-03-09 Eastman Kodak Company Method and apparatus for continuous liquefaction of gelled photographic materials

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