US2422105A - Cooling apparatus for heat-treated work using air jets - Google Patents
Cooling apparatus for heat-treated work using air jets Download PDFInfo
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- US2422105A US2422105A US623242A US62324245A US2422105A US 2422105 A US2422105 A US 2422105A US 623242 A US623242 A US 623242A US 62324245 A US62324245 A US 62324245A US 2422105 A US2422105 A US 2422105A
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- 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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/84—Controlled slow cooling
Definitions
- the invention relates to heat treating furnaces of the type embodying an elongated cooling chamber for the controlled cooling of work after heating. Certain steels are advantageously Iquickly cooled from above to below the critical temperature; and it is the object of the invention to provide an improved cooling unit for thus initially quickly cooling the heated steel with a rapidly circulating gaseous cooling medium.
- Fig. 1 is a diagrammatic side elevation of a heat treating furnace embodying the present invention.
- Fig. 2 is an enlarged vertical transverse section on line 2 2 of Fig. 1 with some parts more or less diagrammatically shown.
- Fig. 3 is an enlarged vertical longitudinal section on line 3--3 of Fig. 1 with some parts more or less diagrammatically shown.
- Fig. 4 is a fragmentary detail view on line -d of Fig. 2.
- the heat treating furnace comprises a heating zone A, a quick cooling zone B, and a slow cooling zone C, in the order named.
- the gaseous cooling medium is of such composition as to constitute a protective atmosphere for the heated steel and this atmosphere will prevail throughout the length of the furnace.
- a roller hearth conveyor 5 will ordinarily be employed for supporting the work during its progress through the furnace.
- the heating means may comprise upper and lower rows of radiant tubes I0.
- the connecting passage therebetween is made as restricted as possible consonant with passage of the work therethrough.
- a vertically adjustable door 8 permits the effective height of the passageway to be adjusted as conditions may require. Water cooled wall sections 6 and i are desirably provided between said zones.
- the quick cooling zone or chamber B comprises a horizontally disposed upper wall l5, a, horizontally disposed lower wall i6, and side walls il therebetween.
- the aim of the present invention is to provide improvements in means for forcibly circulating relatively great volumes of gaseous cooling medium into and out of contact with the heated steel passing through the cooling chamber and withal to construct certain parts of the apparatus in such a way as to permit ready assembly of' the various separate parts in the field with minimum trouble and expense.
- plenum chamber i8 comprised of the horizontal wall i5, side walls 35 and a top wall E9.
- plenum chamber i9 comprised of the horizontal wall i6, side walls 38 and a bottom wall iii.
- An upper blower 25 delivers gaseous cooling medium to the upper plenum chamber i8 .and a blower 26 delivers the same kind of cooling medium to the lower plenum chamber i9.
- Gaseous cooling medium from the upper plenum chamber i8 is blasted against the upper side of the work by a plurality of nozzles 20 which extend downwardly from the bottom of the plenum chamber and which extend crosswise of the cooling chamber whereby the gas jet from each nozzle is in the form or a continuous sheet crosswise of the cooling chamber.
- a damper 22 above each nozzle 20 permits adjustment of blasting effect lengthwlseof the cooling chamber.
- Gaseous cooling medium from the lower plenum chamber i9 is blasted against the underside of the work by a plurality of nozzles 2i which extend upwardly from the top of the plenum chamber and which extend crosswise of the cooling chamber whereby the gas jet from each nozzle is in the form of a continuous sheet crosswise o the cooling chamber.
- a damper 23 below each nozzle 2i permits adjustment of the blasting effect lengthwise of' the cooling chamber.
- Ilihe upper blower 25 and the upper plenum chamber i8 are interconnected by a conventional bolted flange connection 29; and the lower blower 26 and the lower plenum chamber I9 are likewise interconnected by a conventional bolted flange connection 3l.
- the joint between the top wall 28 of the upper plenum chamber and the side walls 35 is made gas-tight by a liquid seal comprising a liquid holding trough 3d which encircles the upper portion of the plenum chamber, thus permitting the top wall to be readily installed gas-tight in the eld.
- Thejoint between the bottom wall 30 of the lower plenum chamber and the side walls 38 is made gas-tight by a liquid seal' comprising a peripheral liquid holding trough 31 carried by the bottom wall 30, thus permitting the latter to be readily installed gas-tight in the ileld.
- the suction or intake side of the upper blower is connected by a pair of return ducts 42 and 43 with the opposite sides of the upper portion of cooling chamber B; and the suction or intake side of the lower blower 26 ls connected by apair of return ducts 44 and 45 with the opposite sides of the lower portion of the said cooling chamber.
- This system of return ducts from the opposite sides or ⁇ ooth the upper and lower portions of the cooling chamber is an important feature of the invention because the upper and lower portions of the cooling chamber are thereby made substantially independent of each other as regards circulation of the gaseous cooling medium.
- each of the return ducts is comprised of a horizontally extending row of exhaust p'orts each provided with a damper to control its effective inlet. thereby permitting the exhaust effect to be controlled lengthwise of the cooling chamber B.
- the exhaust ports for the upper half of the cooling chamber are indicated at 4E and those of the lower half at di.
- the damper for the individual exhaust ports comprises an upright plate 52 xedly secured to an upright turnable shaft 53 adapted to held in adjusted position by a clamping nut on the shalt.
- the shaft projects through the lower adjacent wall 55 of the duct 42.
- the shaft will project th'rough the upper adjacent wall of the lower ducts 46 and A5.
- Each of the upper return ducts i2 and 43 is made in upper and lower sections, and the joint therebetween is made gas-tight by a liquid seal comprising a, liquid holding trough E@ which surrounds the lower section, thus permitting the sections to be readily connected gas-tight in the held; and each of the lower return ducts 4d and i5 is also made in upper and lower sections and the joint therebetween is likewise made gas-tight by a liquid seal comprising a liquid holding trough 6i which surrounds the lower section, thus permitting the sections to be readily connected gastight in the field.
- each of thefour return ducts i12-d5 there is provided a heat exchanger means for cooling the spent cooling medium, the means for .the upper ducts being diagrammatically indicated at d8 and thosef or the lower ducts at as. Water pipes leadlng to and from the individual heat exchangers are indicated at 50.
- the recirculating rate of the upper blower 25 may be controlled by a master damper 58 and that of the lower blower 26 by a master damper 59. Make-up gas will ordinarily be supplied to the system at th'e intake side of the respective blowers.
- wall means including top and bottom walls and right and left hand side walls forming a treating chamber wherein material on passing therethrough may be treated with gaseous treating medium
- wall means including said top wall forming a first plenum chamber outside of said treating chamber for receiving a supply of said treating medium from means including a blower, a first set of right and left hand suction conduits leading from the suction side of said blower and y communicating with' the upper portion of said treating chamber through the rightvand left hand side walls thereof for withdrawing spent treating medium therefrom, wall means including said therefrom. and nozzles extending' into said treating-'chamber ⁇ from the upper and lower plenum chambers for directing gaseous treating medium from the plenum chambers against the upper and lower sides, respectively, oi the said material moving through the treating chamber.
- each of said suction conduits having a, joint between its ends and means comprising a liquid holding trough around each joint to make it gastight.
- wall means including upper and lower walls and right and left hand side Walls forming a, treating chamber for material passing therethrough
- wall means including a top wall and side walls above the said upper wall forming a plenum chamber for gaseous treating medium
- a blower for delivering said treating medium to said plenum chamber
- nozzle means for blasting the top side of said material with' gaseous treating medium from said plenum chamber
- duct means leading from the treating chamber to the intake side of the blower for returning spent treating medium to the circuit
- means comprising a, liquid holding trough encircling the upper portion of the plenum chamber to provide a gas-tight lloint between the said top wall of the plenum chamber and the side walls th'ereof.
- wall means including upper and lower walls and right and left hand side walls forming a treating chamber for material passing therethrough
- wall means including a bottom wall and side walls below said lower wall forming a plenum chamber for gaseous treating medium
- a blower for delivering said treating medium to said plenum chamber
- nozzle means for blasting the underside of said material with gaseous treating medium from said plenum chamber
- duct means leading from the treating chamber to the intake side of the blower for returning spent treating medium to the circuit
- the combination of wall means including upper and lower walls and right and left hand side walls forming a treating chamber for material passing therethrough, means including a top wall and side walls above the said upper wall forming a plenum chamber for gaseous treating medium, a blower for delivering said treating medium to said plenum chamber, nozzle means for blasting the top side of said material with gaseous treating medium from said plenum chamber, means comprising a liquid holding trough encircling the upper portion of the plenum chamber to provide a gas-tight joint between the said top wall of the plenum chamber and the side walls thereof, ducts leading upwardly from the opposite sides of the upper portion of the treating chamber to the intake side of said blower for returning spent treating medium to the circuit, each of saidducts comprising upper and lower sections, and means comprising a liquid holding trough surrounding each' the sections.
- wall means including upper and lower walls and right and left hand side walls forming a treating chamber for material passing therethrough
- wall means including a bottom wall and side walls below said lower wall forming a plenum chamber for gaseous treating medium
- blower for delivering said treating medium to said plenum chamber
- nozzle means for blasting the underside of said material with gaseous treating medium from said plenum chamber
- means comprising a liquid holding trough encircling the lower portion of the plenum chamber to provide a.
- each of said ducts comprising upper and lower sections, and means comprising a liquid holding trough surrounding each of said ducts at the joint'between the sections thereof to make said joint gas-tight.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatments In General, Especially Conveying And Cooling (AREA)
Description
.Pune l0, 1947. w. LEHRER 2,422,105
COOLING APPAATUS FOR HEAT TREATED WORK USING AIR JETS Original Filed June 3, 1943 2 Sheets-Sheet 1 (worneg vw. LEHRER June 10, 1947.
COOLING APPARATUS FOR HEAT TREATED WORK USING AIR JETS 2Sheets-Sheet 2 Original Filed June 3, 1943 I l /l l l l l 1%/ ///l Smaentor A MLK/MH? (ltforneg Patented June 10, 1947 COOLING APPARATUS FOR HEAT-TREATED .WORK USING AIR JETS William Lehrer, Toledo, Ohio, assignor to Surfacel Combustion Corporation, Toledo, Ohio, a
corporation of Ohio 'continuation of application serial No. 489,567, June 3, 1943. This application October 19, 1945,
Serial No. 623,242
.6 Claims. 1
This` application is a continuation of my application lSerial No. 489,567 led June 3, 1943.
The invention relates to heat treating furnaces of the type embodying an elongated cooling chamber for the controlled cooling of work after heating. Certain steels are advantageously Iquickly cooled from above to below the critical temperature; and it is the object of the invention to provide an improved cooling unit for thus initially quickly cooling the heated steel with a rapidly circulating gaseous cooling medium.
For a consideration of what I believe to be novel and my invention, attention is directed to the following specication and the claims appended thereto.
In the accompanying drawings,
Fig. 1 is a diagrammatic side elevation of a heat treating furnace embodying the present invention.
Fig. 2 is an enlarged vertical transverse section on line 2 2 of Fig. 1 with some parts more or less diagrammatically shown.
Fig. 3 is an enlarged vertical longitudinal section on line 3--3 of Fig. 1 with some parts more or less diagrammatically shown.
Fig. 4 is a fragmentary detail view on line -d of Fig. 2.
Referring to Fig. 1, the heat treating furnace comprises a heating zone A, a quick cooling zone B, and a slow cooling zone C, in the order named. The gaseous cooling medium is of such composition as to constitute a protective atmosphere for the heated steel and this atmosphere will prevail throughout the length of the furnace.
In the case of elongated work such as tubes or sheets (diagrammatically indicated at W in Figs. 2 and 3), a roller hearth conveyor 5 will ordinarily be employed for supporting the work during its progress through the furnace. In the heating zone or chamber A, the heating means may comprise upper and lower rows of radiant tubes I0. To reduce heat transfer between the heating and quick cooling zones to a minimum, the connecting passage therebetween is made as restricted as possible consonant with passage of the work therethrough. A vertically adjustable door 8 permits the effective height of the passageway to be adjusted as conditions may require. Water cooled wall sections 6 and i are desirably provided between said zones.
The quick cooling zone or chamber B comprises a horizontally disposed upper wall l5, a, horizontally disposed lower wall i6, and side walls il therebetween. The aim of the present invention is to provide improvements in means for forcibly circulating relatively great volumes of gaseous cooling medium into and out of contact with the heated steel passing through the cooling chamber and withal to construct certain parts of the apparatus in such a way as to permit ready assembly of' the various separate parts in the field with minimum trouble and expense.
In the present invention there is provided above the cooling chamber B a plenum chamber i8 comprised of the horizontal wall i5, side walls 35 and a top wall E9. There is also provided below the cooling chamber a. plenum chamber i9 comprised of the horizontal wall i6, side walls 38 and a bottom wall iii. An upper blower 25 delivers gaseous cooling medium to the upper plenum chamber i8 .and a blower 26 delivers the same kind of cooling medium to the lower plenum chamber i9.
Gaseous cooling medium from the upper plenum chamber i8 is blasted against the upper side of the work by a plurality of nozzles 20 which extend downwardly from the bottom of the plenum chamber and which extend crosswise of the cooling chamber whereby the gas jet from each nozzle is in the form or a continuous sheet crosswise of the cooling chamber. A damper 22 above each nozzle 20 permits adjustment of blasting effect lengthwlseof the cooling chamber.
Gaseous cooling medium from the lower plenum chamber i9 is blasted against the underside of the work by a plurality of nozzles 2i which extend upwardly from the top of the plenum chamber and which extend crosswise of the cooling chamber whereby the gas jet from each nozzle is in the form of a continuous sheet crosswise o the cooling chamber. A damper 23 below each nozzle 2i permits adjustment of the blasting effect lengthwise of' the cooling chamber.
Ilihe upper blower 25 and the upper plenum chamber i8 are interconnected by a conventional bolted flange connection 29; and the lower blower 26 and the lower plenum chamber I9 are likewise interconnected by a conventional bolted flange connection 3l.
The joint between the top wall 28 of the upper plenum chamber and the side walls 35 is made gas-tight by a liquid seal comprising a liquid holding trough 3d which encircles the upper portion of the plenum chamber, thus permitting the top wall to be readily installed gas-tight in the eld. Thejoint between the bottom wall 30 of the lower plenum chamber and the side walls 38 is made gas-tight by a liquid seal' comprising a peripheral liquid holding trough 31 carried by the bottom wall 30, thus permitting the latter to be readily installed gas-tight in the ileld.
The suction or intake side of the upper blower is connected by a pair of return ducts 42 and 43 with the opposite sides of the upper portion of cooling chamber B; and the suction or intake side of the lower blower 26 ls connected by apair of return ducts 44 and 45 with the opposite sides of the lower portion of the said cooling chamber. This system of return ducts from the opposite sides or `ooth the upper and lower portions of the cooling chamber is an important feature of the invention because the upper and lower portions of the cooling chamber are thereby made substantially independent of each other as regards circulation of the gaseous cooling medium.
At their intake ends, each of the return ducts is comprised of a horizontally extending row of exhaust p'orts each provided with a damper to control its effective inlet. thereby permitting the exhaust effect to be controlled lengthwise of the cooling chamber B. The exhaust ports for the upper half of the cooling chamber are indicated at 4E and those of the lower half at di. The damper for the individual exhaust ports comprises an upright plate 52 xedly secured to an upright turnable shaft 53 adapted to held in adjusted position by a clamping nut on the shalt. In Fig. 4, the shaft projects through the lower adjacent wall 55 of the duct 42. For the lower dampers the shaft will project th'rough the upper adjacent wall of the lower ducts 46 and A5.
Each of the upper return ducts i2 and 43 is made in upper and lower sections, and the joint therebetween is made gas-tight by a liquid seal comprising a, liquid holding trough E@ which surrounds the lower section, thus permitting the sections to be readily connected gas-tight in the held; and each of the lower return ducts 4d and i5 is also made in upper and lower sections and the joint therebetween is likewise made gas-tight by a liquid seal comprising a liquid holding trough 6i which surrounds the lower section, thus permitting the sections to be readily connected gastight in the field.
In each of thefour return ducts i12-d5 there is provided a heat exchanger means for cooling the spent cooling medium, the means for .the upper ducts being diagrammatically indicated at d8 and thosef or the lower ducts at as. Water pipes leadlng to and from the individual heat exchangers are indicated at 50.
The recirculating rate of the upper blower 25 may be controlled by a master damper 58 and that of the lower blower 26 by a master damper 59. Make-up gas will ordinarily be supplied to the system at th'e intake side of the respective blowers.
What I claim as new and desire to secure by Letters Patent is:
1. In apparatus of the class described, the combination of wall means including top and bottom walls and right and left hand side walls forming a treating chamber wherein material on passing therethrough may be treated with gaseous treating medium, wall means including said top wall forming a first plenum chamber outside of said treating chamber for receiving a supply of said treating medium from means including a blower, a first set of right and left hand suction conduits leading from the suction side of said blower and y communicating with' the upper portion of said treating chamber through the rightvand left hand side walls thereof for withdrawing spent treating medium therefrom, wall means including said therefrom. and nozzles extending' into said treating-'chamber `from the upper and lower plenum chambers for directing gaseous treating medium from the plenum chambers against the upper and lower sides, respectively, oi the said material moving through the treating chamber.
2. In the combination as set forth in claim l, each of said suction conduits having a, joint between its ends and means comprising a liquid holding trough around each joint to make it gastight.
3. In apparatus of the class described, the combination of wall means including upper and lower walls and right and left hand side Walls forming a, treating chamber for material passing therethrough, wall means including a top wall and side walls above the said upper wall forming a plenum chamber for gaseous treating medium, a blower for delivering said treating medium to said plenum chamber, nozzle means for blasting the top side of said material with' gaseous treating medium from said plenum chamber, duct means leading from the treating chamber to the intake side of the blower for returning spent treating medium to the circuit, and means comprising a, liquid holding trough encircling the upper portion of the plenum chamber to provide a gas-tight lloint between the said top wall of the plenum chamber and the side walls th'ereof.
4. In apparatus of the class described, the combination of wall means including upper and lower walls and right and left hand side walls forming a treating chamber for material passing therethrough, wall means including a bottom wall and side walls below said lower wall forming a plenum chamber for gaseous treating medium, a blower for delivering said treating medium to said plenum chamber, nozzle means for blasting the underside of said material with gaseous treating medium from said plenum chamber, duct means leading from the treating chamber to the intake side of the blower for returning spent treating medium to the circuit, and meanscomprising a liquid holding trough encircling the lower portion oi the plenum chamber to provide a gas-tight joint between the said bottom wall of the plenum chamber and the side walls thereof.
5. lIn apparatus of the class described, the combination of wall means including upper and lower walls and right and left hand side walls forming a treating chamber for material passing therethrough, means including a top wall and side walls above the said upper wall forming a plenum chamber for gaseous treating medium, a blower for delivering said treating medium to said plenum chamber, nozzle means for blasting the top side of said material with gaseous treating medium from said plenum chamber, means comprising a liquid holding trough encircling the upper portion of the plenum chamber to provide a gas-tight joint between the said top wall of the plenum chamber and the side walls thereof, ducts leading upwardly from the opposite sides of the upper portion of the treating chamber to the intake side of said blower for returning spent treating medium to the circuit, each of saidducts comprising upper and lower sections, and means comprising a liquid holding trough surrounding each' the sections.
of said ducts at the joint between thereof to make said joint gas-tight. y
6. In apparatus of the class described, the combination of wall means including upper and lower walls and right and left hand side walls forming a treating chamber for material passing therethrough, wall means including a bottom wall and side walls below said lower wall forminga plenum chamber for gaseous treating medium, a blower for delivering said treating medium to said plenum chamber, nozzle means for blasting the underside of said material with gaseous treating medium from said plenum chamber, means comprising a liquid holding trough encircling the lower portion of the plenum chamber to provide a. gas-tight joint between the said bottom wall of the plenum chamber and the side walls thereof, ducts leading downwardly from the opposite sides of the lower portion of the treating chamber to the intake side of said blower for returning spent *treating medium to the circuit, each of said ducts comprising upper and lower sections, and means comprising a liquid holding trough surrounding each of said ducts at the joint'between the sections thereof to make said joint gas-tight.
REFERENCES CITED The following references are of record in the le of this patent:
UNITED STATES PA'I'ENTS Slenfeld Aug. 25, 1942
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US623242A US2422105A (en) | 1945-10-19 | 1945-10-19 | Cooling apparatus for heat-treated work using air jets |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US623242A US2422105A (en) | 1945-10-19 | 1945-10-19 | Cooling apparatus for heat-treated work using air jets |
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| Publication Number | Publication Date |
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| US2422105A true US2422105A (en) | 1947-06-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| US623242A Expired - Lifetime US2422105A (en) | 1945-10-19 | 1945-10-19 | Cooling apparatus for heat-treated work using air jets |
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| US (1) | US2422105A (en) |
Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2462380A (en) * | 1946-01-05 | 1949-02-22 | Andrews & Goodrich Inc | Method and apparatus for drying web material |
| US2525661A (en) * | 1946-12-31 | 1950-10-10 | Young Brothers Company | Vertical drying oven |
| US2525051A (en) * | 1946-07-19 | 1950-10-10 | Kindred L Storrs | Distillation method and apparatus |
| US2603882A (en) * | 1948-05-20 | 1952-07-22 | Carl F Mayer | Cooling system for industrial ovens of the conveyer type |
| US2671279A (en) * | 1949-11-08 | 1954-03-09 | J O Ross Engineering Corp | Drier |
| US2700226A (en) * | 1950-04-21 | 1955-01-25 | Dungler Julien | Drying or like treatment apparatus for web material with fluid deflecting baffle means |
| US2780877A (en) * | 1953-10-02 | 1957-02-12 | American Viscose Corp | Fluid controlling system |
| US2807892A (en) * | 1954-03-16 | 1957-10-01 | Wolverine Equipment Co | Dryers |
| US2818660A (en) * | 1954-08-24 | 1958-01-07 | Gen Box Distributors | Drier for composite paper and veneer sheet material |
| US3015168A (en) * | 1959-12-24 | 1962-01-02 | Ibm | Web conditioning machine |
| US3068586A (en) * | 1959-02-18 | 1962-12-18 | Electric Furnace Co | Forced cooling means and method for continuous strip furnaces |
| US3102009A (en) * | 1960-03-28 | 1963-08-27 | Gen Electric | Apparatus for thermal treatment of metal |
| US3269354A (en) * | 1962-05-04 | 1966-08-30 | Selas Corp Of America | Pipe coating apparatus |
| US3371430A (en) * | 1966-08-25 | 1968-03-05 | Edward W. Bowman | Rapid cooling system for glass annealing lehrs |
| DE1263053B (en) * | 1962-07-10 | 1968-03-14 | Electric Furnace Company | Device for compressed air cooling of metal, in particular steel belts |
| DE1275563B (en) * | 1960-03-28 | 1968-08-22 | Gen Electric | Device for cooling or heating a metal strip |
| US3402762A (en) * | 1965-12-22 | 1968-09-24 | Kreuter & Co K G | Method of and apparatus for cooling chocolate-covered articles or the like |
| DE1404534B1 (en) * | 1957-08-12 | 1969-09-04 | Omni Pac Gmbh | Continuously operated tunnel dryer |
| US4306359A (en) * | 1980-02-11 | 1981-12-22 | Wolverine Corporation | Material treatment system |
| US4957432A (en) * | 1987-09-01 | 1990-09-18 | Phillips Petroleum Company | Forced jet convection oven for vacuum bagging |
| US20080276488A1 (en) * | 2007-05-07 | 2008-11-13 | Paul Seidl | Step air foil web stabilizer |
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| US1670991A (en) * | 1925-04-25 | 1928-05-22 | Schilde Richard | Apparatus for drying fabrics and the like |
| US1737015A (en) * | 1928-04-30 | 1929-11-26 | Carle J Merrill | Machine for drying coated webs |
| US1888573A (en) * | 1929-11-13 | 1932-11-22 | Sadwith Ryan | Drier |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2462380A (en) * | 1946-01-05 | 1949-02-22 | Andrews & Goodrich Inc | Method and apparatus for drying web material |
| US2525051A (en) * | 1946-07-19 | 1950-10-10 | Kindred L Storrs | Distillation method and apparatus |
| US2525661A (en) * | 1946-12-31 | 1950-10-10 | Young Brothers Company | Vertical drying oven |
| US2603882A (en) * | 1948-05-20 | 1952-07-22 | Carl F Mayer | Cooling system for industrial ovens of the conveyer type |
| US2671279A (en) * | 1949-11-08 | 1954-03-09 | J O Ross Engineering Corp | Drier |
| US2700226A (en) * | 1950-04-21 | 1955-01-25 | Dungler Julien | Drying or like treatment apparatus for web material with fluid deflecting baffle means |
| US2780877A (en) * | 1953-10-02 | 1957-02-12 | American Viscose Corp | Fluid controlling system |
| US2807892A (en) * | 1954-03-16 | 1957-10-01 | Wolverine Equipment Co | Dryers |
| US2818660A (en) * | 1954-08-24 | 1958-01-07 | Gen Box Distributors | Drier for composite paper and veneer sheet material |
| DE1404534B1 (en) * | 1957-08-12 | 1969-09-04 | Omni Pac Gmbh | Continuously operated tunnel dryer |
| US3068586A (en) * | 1959-02-18 | 1962-12-18 | Electric Furnace Co | Forced cooling means and method for continuous strip furnaces |
| US3015168A (en) * | 1959-12-24 | 1962-01-02 | Ibm | Web conditioning machine |
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| US20080276488A1 (en) * | 2007-05-07 | 2008-11-13 | Paul Seidl | Step air foil web stabilizer |
| US8061055B2 (en) * | 2007-05-07 | 2011-11-22 | Megtec Systems, Inc. | Step air foil web stabilizer |
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