US2468794A - Vented cooker valve - Google Patents

Vented cooker valve Download PDF

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US2468794A
US2468794A US669727A US66972746A US2468794A US 2468794 A US2468794 A US 2468794A US 669727 A US669727 A US 669727A US 66972746 A US66972746 A US 66972746A US 2468794 A US2468794 A US 2468794A
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chamber
cooker
pockets
valve
air
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US669727A
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Paul C Wilbur
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FMC Corp
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FMC Corp
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K5/00Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47JKITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J27/00Cooking-vessels
    • A47J27/08Pressure-cookers; Lids or locking devices specially adapted therefor

Definitions

  • the present invention appertains to pressure cookers having a treating chamber for treating articles therein and more particularly relates to fluid tight valves associated therewith for admitting articles to or for discharging them from said chamber.
  • valves well known in the art, admit the articles to or discharge the same from the pressure treating chamber of the cooker in a satisfactory manner and with a minimum release of pressure therefrom, however, they necessarily carry a certain amount of air at atmospheric pressure into the chamber.
  • the air thus introduced into the chamber during continuous operation of the valves causes the formation of air pockets in the chamber which prevent complete sterilization of the articles treated unless the cooker is constantly bled whereby a continuous agitation of the treating medium in the chamber is obtained and the formation of air pockets is thereby prevented.
  • air is continuously admitted into the treating chamber by the inlet and outlet valves thereof and mixed with the treating medium whereby the rate of heat exchange between the treating medium and the articles to be treated is reduced.
  • the reduction of the rate of heat exchange requires a greater input of heat treating medium into the chamber in order to operate the cooker at its maximum efliciency.
  • the present invention contemplates the elimination of the admittance of air into the treating chamber of the cooker by the inlet and outlet valves and maintenance of the maximum heat exchange efiiciency in the pressure medium therein.
  • Another object is to provide an apparatus for automatically ejecting the air from the pockets of the inlet and outlet valves of cookers prior to registration of the pockets with the treating chamber so as to eliminate the introduction of air into the same.
  • Another object is to provide an apparatus for venting the article carrying pockets of inlet and outlet valves of cooking apparatus and for charging the pockets with treating medium to displace the air therefrom prior to the communication of the pockets with the treating chamber.
  • Fig. 1 is a fragmentary end View of a combined cooker and cooler and a feed and discharge valve associated therewith; certain parts are broken away while others are shown in section.
  • Fig. 2 is a side view of the feed valve or inlet valve shown in Fig. 1, the view being taken along line 22 of Fig. 1.
  • Fig. 31 s a fragmentary section through the 3 Claims. (Cl. 198211) discharge or transfer valve of the cooker and cooler taken along line 3-3 of Fig. 1.
  • the cooker is indicated by reference numeral I and the cooler by reference numeral 2 each of which comprises a cylindrical shell 3 and t, respectively, providing separate pressure chambers 5 and 6.
  • the chamber 5 of the cooker is supplied with steam under pressure from a source, not shown, and the steam thus supplied is maintained at suitable sterilizing pressure and temperature in a well known manner.
  • the apparatus illustrated is adapted for handling canned goods and, as disclosed in the aforementioned patent, the cans are conveyed through the chamber 5 of the cooker along a helical track, not shown, by a reel 1, part of which is shown in Fig. 1.
  • the cooker is provided with a central shaft 8 to which the reel 1 is secured and the shaft is driven in a conventional manner to cause the cans to move through the chamber 5 at a predetermined speed to assure maximum cooking efliciency.
  • the cans are sup-plied to the cooker I (Fig. 1) through a feed valve In comprising a housing ll bolted, as shown at l2, in sealed relation to the shell 3 adjacent one end thereof and. a rotary turret 13 mounted within the housing ,II on a shaft I4 journalled in bearings I 5 on the side walls of the housing. Secured to one end of the shaft M is a gear Hi which meshes with a bull gear I! in turn secured to the shaft 8 for driving the turret in timed relation with the reel 1.
  • the housing II has an annular wall l9 provided with an inlet '20 through which the cans are successively fed one after another into pockets 2
  • the pockets 2i are sealed from each other by Sealing strips 22 in the partitions between the pockets which sealing strips bear against the inner face of the annular wall I9.
  • the pockets 2! are further sealed from one another by sealing rings 23 (Fig. 3) which expand against the inner face of the annular wall [9 and are urged against the sides of the turret l3 by springs 24.
  • the shell 3 is provided with an opening 26 over which either a discharge valve or a transfer valve is mounted, in sealed relation to the shell 3, through which valve the cans pass for further handling.
  • the cans discharging from the cooker l discharge into a transfer valve 27 of a structure similar to the feed valve l described above except that the annular wall I9 of the housing H of the transfer valve has an inlet 28 communicating with the opening 26 of the cooker shell and an outlet, not shown, discharging into a can track 29 in the chamber of the cooler for conveyance therethrough by a reel 39 in the same manner as hereinbefore explained in connection with the cooker.
  • the reel of the cooler is associated with a central shaft 3! and the transfer valve 21 has a turret l3 mounted on a shaft M to which a gear I5 is secured meshing with bull gears 32 and 33 associated with the shafts '8 and 3! of the cooker and cooler, respectively.
  • the chamber 5 of the cooler is divided into several compartments each of which is supplied with a cooling medium, such as water, which attains a temperature at its can receiving end sufficient to prevent panelling of the cans and air under pressure to establish a limited pressure differential sufiicient to prevent bursting of the cans while they are gradually cooled as they are conveyed through the cooler. Consequently, as the cans leave the pockets 2! of the transfer valve, air enters the pockets 2!
  • a cooling medium such as water
  • each of the housings I I and I I is provided with transversely aligned openings 34 and 35 in their annular walls 19 and I9 on that side thereof where the pockets approach the chamber. Threaded into the opening 34 of the feed valve I9 is one end of a conduit 36 having its other end threaded into a tapped opening 31 in the shell 3 to permit steam coming from the chamber 5 to enter each pocket as it is isolated within the housing H and approaching the chamber.
  • the conduit 36 is provided with a valve 38 or. if desired, it may be provided with a fixed orifice for controlling the discharge of steam quently, the isolated pocket will receive a charge of steam at the pressure prevailing within the chamber 5 to eject the air from the pocket which is vented through the opening 35.
  • the opening 35 has a pipe 39 threaded thereinto for discharging the air and steam ejected from the valve pockets into the atmosphere and, if preferred, this pipe 39 may be connected to a stack, not shown, to carry the ejected air and steam away from the apparatus.
  • of the transfer valve 2? is similar displaced by providing the transfer valve with a conduit 36' threaded into the opening 36 in the annular wall IQ of the transfer valve which conduit 35' is also communicated with the chamber 5, as shown in Fig. 1.
  • each pocket 2! and 21 is isolated within its respective valve housing and approaches the chamber it passes the openings 34 to receive a charge of steam from the chamber 5 via the conduit 36 or 36', as the case may be, to displace and eject the air from the pocket through the vent provided by the openings 35 and the conduit 39 or 39. Consequently, as the pockets pass out of registration with the openings 3% and 35, they are completely charged with steam at a pressure and temperature comparable to that of the treating medium in the chamber 5 so that when the pockets subsequently communicate with the chamber 5 to discharge cans into the same or to receive cans therefrom, there will be no air admitted into the chamber 5 and, therefore, the steam under pressure in the chamber 5 will be maintained at its maximum heat exchanging efficiency.
  • a valvefor admitting articles to 'or discharging them from the chamber comprising a housing ets during the introduction of treating medium into the same for ejecting air therefrom prior to communication of said pocket with said chamher.
  • a pressure treating apparatus having a chamber containing heat treating medium and a valve for admitting articles to or discharging them from said chamber, said valve comprising a housing provided with a cylindrical surface and having inlet and outlet openings therein and enclosing a rotary turret having an article carrying pocket in its periphery alternately communicable with the interior and exterior of said chamber through said openings, sealing means intermediate said housing and turret, a conduit extending from said chamber to said housing for discharging heat treating medium into said pocket as it approaches said chamber, and means for venting said pocket while it receives heat treating medium from-said conduit for ejecting the air from said pocket prior to its communication with said chamber.
  • a valve for a pressure treating chamber comprising a housing having an inlet and an outlet opening, one communicating with the interior of said chamber and the other communicating with the exterior of said chamber, a rotary turret in said housing having a pocket for receiving an article at one of said openings and for discharging the article at the other of said openings, said valve having means intermediate said housing and turret for sealing the pocket therein during its movement between said openings, means for injecting a charge of pressure treating medium into said pocket as it approaches communication with the interior of said chamber and for simultaneously venting said pocket for ejecting air therefrom prior to communication of the pocket with said chamber.

Description

May 3, 1949. RC. WILBUR VENTED COOKER VALVE Filed May 14, 1946 ww 7 mm PAUL. C. W/LBUE;
attew m Patented May 3, 1949 VENTED COOKER VALVE.
Paul C. Wilbur, San Jose, Calif., assignor to Food Machinery and Chemical Corporation, a corporation of Delaware Application May 14, 1946, Serial No. 669,727
The present invention appertains to pressure cookers having a treating chamber for treating articles therein and more particularly relates to fluid tight valves associated therewith for admitting articles to or for discharging them from said chamber.
These valves, well known in the art, admit the articles to or discharge the same from the pressure treating chamber of the cooker in a satisfactory manner and with a minimum release of pressure therefrom, however, they necessarily carry a certain amount of air at atmospheric pressure into the chamber. The air thus introduced into the chamber during continuous operation of the valves causes the formation of air pockets in the chamber which prevent complete sterilization of the articles treated unless the cooker is constantly bled whereby a continuous agitation of the treating medium in the chamber is obtained and the formation of air pockets is thereby prevented. However, irrespective of the constant bleeding of the cooker, air is continuously admitted into the treating chamber by the inlet and outlet valves thereof and mixed with the treating medium whereby the rate of heat exchange between the treating medium and the articles to be treated is reduced. Furthermore, the reduction of the rate of heat exchange requires a greater input of heat treating medium into the chamber in order to operate the cooker at its maximum efliciency.
The present invention contemplates the elimination of the admittance of air into the treating chamber of the cooker by the inlet and outlet valves and maintenance of the maximum heat exchange efiiciency in the pressure medium therein.
Another object is to provide an apparatus for automatically ejecting the air from the pockets of the inlet and outlet valves of cookers prior to registration of the pockets with the treating chamber so as to eliminate the introduction of air into the same.
Another object is to provide an apparatus for venting the article carrying pockets of inlet and outlet valves of cooking apparatus and for charging the pockets with treating medium to displace the air therefrom prior to the communication of the pockets with the treating chamber.
Other and further objects and advantages of the present invention will become apparent from the description and drawings in which:
Fig. 1 is a fragmentary end View of a combined cooker and cooler and a feed and discharge valve associated therewith; certain parts are broken away while others are shown in section.
Fig. 2 is a side view of the feed valve or inlet valve shown in Fig. 1, the view being taken along line 22 of Fig. 1.
Fig. 31s a fragmentary section through the 3 Claims. (Cl. 198211) discharge or transfer valve of the cooker and cooler taken along line 3-3 of Fig. 1.
For purposes of this application the present invention has been illustrated in association with a cooker and cooler of the type described in reissued patent to Albert R. Thompson, No. 15,334, dated April 11, 1922. It should be understood, however, that the invention herein is equally applicable to other forms of pressure treating apparatus and, therefore, is not limited to the precise construction shown herein. Since the construction, operation, and general purpose of the cooker and cooler illustrated herein are specifically described in the above mentioned patent, only so much of its structure and operation will be given herein as necessary to a clear understanding of the present invention.
In Fig. 1 of the drawings, the cooker is indicated by reference numeral I and the cooler by reference numeral 2 each of which comprises a cylindrical shell 3 and t, respectively, providing separate pressure chambers 5 and 6. The chamber 5 of the cooker is supplied with steam under pressure from a source, not shown, and the steam thus supplied is maintained at suitable sterilizing pressure and temperature in a well known manner. The apparatus illustrated is adapted for handling canned goods and, as disclosed in the aforementioned patent, the cans are conveyed through the chamber 5 of the cooker along a helical track, not shown, by a reel 1, part of which is shown in Fig. 1. The cooker is provided with a central shaft 8 to which the reel 1 is secured and the shaft is driven in a conventional manner to cause the cans to move through the chamber 5 at a predetermined speed to assure maximum cooking efliciency.
The cans are sup-plied to the cooker I (Fig. 1) through a feed valve In comprising a housing ll bolted, as shown at l2, in sealed relation to the shell 3 adjacent one end thereof and. a rotary turret 13 mounted within the housing ,II on a shaft I4 journalled in bearings I 5 on the side walls of the housing. Secured to one end of the shaft M is a gear Hi which meshes with a bull gear I! in turn secured to the shaft 8 for driving the turret in timed relation with the reel 1.
The housing II has an annular wall l9 provided with an inlet '20 through which the cans are successively fed one after another into pockets 2| formed in the periphery of the turret I 3. The pockets 2i are sealed from each other by Sealing strips 22 in the partitions between the pockets which sealing strips bear against the inner face of the annular wall I9. The pockets 2! are further sealed from one another by sealing rings 23 (Fig. 3) which expand against the inner face of the annular wall [9 and are urged against the sides of the turret l3 by springs 24.
supported in glands 2'5 threaded-into'the side walls of the housing. As the turret l3 rotates, the cans received in the pockets 2! are discharged through an outlet 20a. of the'annular wall I9 and fall one after another into the feed end of the helical track within the shell 3 for conveyance therethrough by the reel I.
At the opposite end of the helical track the shell 3 is provided with an opening 26 over which either a discharge valve or a transfer valve is mounted, in sealed relation to the shell 3, through which valve the cans pass for further handling. In the present arrangement, the cans discharging from the cooker l discharge into a transfer valve 27 of a structure similar to the feed valve l described above except that the annular wall I9 of the housing H of the transfer valve has an inlet 28 communicating with the opening 26 of the cooker shell and an outlet, not shown, discharging into a can track 29 in the chamber of the cooler for conveyance therethrough by a reel 39 in the same manner as hereinbefore explained in connection with the cooker.
The reel of the cooler is associated with a central shaft 3! and the transfer valve 21 has a turret l3 mounted on a shaft M to which a gear I5 is secured meshing with bull gears 32 and 33 associated with the shafts '8 and 3! of the cooker and cooler, respectively.
The cans discharging from the cooker are transferred into the cooler by the transfer Valve 21 at sterilizing temperature and, if cooled too suddenly will panel due to a greater than a predetermined temperature differential, or might burst due to a greater than a predetermined pressure differential. Therefore, in accordance with common practice, the chamber 5 of the cooler is divided into several compartments each of which is supplied with a cooling medium, such as water, which attains a temperature at its can receiving end sufficient to prevent panelling of the cans and air under pressure to establish a limited pressure differential sufiicient to prevent bursting of the cans while they are gradually cooled as they are conveyed through the cooler. Consequently, as the cans leave the pockets 2! of the transfer valve, air enters the pockets 2! and will be carried thereby toward the opening 25 communicating with the pressure chamber 5 of the cooker. Likewise, as the pockets 2! of the feed valve In receive cans through the inlet 2;! thereof, air at atmospheric pressure enters the pockets 2| and as they communicate with the chamber 5 they too carry air toward the same.
From the foregoing it is apparent that as either pockets 2! or 2| approach the chamber 5 the air carried by such pockets would normally enter the chamber, admix with the steam therein and thereby lower the heat exchanging efficiency of the steam within the chamber. However, each of the housings I I and I I is provided with transversely aligned openings 34 and 35 in their annular walls 19 and I9 on that side thereof where the pockets approach the chamber. Threaded into the opening 34 of the feed valve I9 is one end of a conduit 36 having its other end threaded into a tapped opening 31 in the shell 3 to permit steam coming from the chamber 5 to enter each pocket as it is isolated within the housing H and approaching the chamber.
The conduit 36 is provided with a valve 38 or. if desired, it may be provided with a fixed orifice for controlling the discharge of steam quently, the isolated pocket will receive a charge of steam at the pressure prevailing within the chamber 5 to eject the air from the pocket which is vented through the opening 35. The opening 35 has a pipe 39 threaded thereinto for discharging the air and steam ejected from the valve pockets into the atmosphere and, if preferred, this pipe 39 may be connected to a stack, not shown, to carry the ejected air and steam away from the apparatus.
The air in the pockets 2| of the transfer valve 2? is similar displaced by providing the transfer valve with a conduit 36' threaded into the opening 36 in the annular wall IQ of the transfer valve which conduit 35' is also communicated with the chamber 5, as shown in Fig. 1. As a pocket 2! registers with the opening 34, it is vented through the opening 35 having an exhaust pipe 39' threaded thereinto in the same manner as above explained in connection with the feed valve iii.
From the foregoing, it will be apparent that as each pocket 2! and 21 is isolated within its respective valve housing and approaches the chamber it passes the openings 34 to receive a charge of steam from the chamber 5 via the conduit 36 or 36', as the case may be, to displace and eject the air from the pocket through the vent provided by the openings 35 and the conduit 39 or 39. Consequently, as the pockets pass out of registration with the openings 3% and 35, they are completely charged with steam at a pressure and temperature comparable to that of the treating medium in the chamber 5 so that when the pockets subsequently communicate with the chamber 5 to discharge cans into the same or to receive cans therefrom, there will be no air admitted into the chamber 5 and, therefore, the steam under pressure in the chamber 5 will be maintained at its maximum heat exchanging efficiency. By eliminating the admission of air into the cooker chamber by way of the feed and discharge valves, as hereinbefore explained, it will no longer be necessary to constantly bleed the pressure chamber to eliminate air pockets therein, as was heretofore the practice, and, consequently, it will only be necessary to bleed the chamber periodically and by hand. Moreover, since the admission of air from the valve pockets into the pressure chamber 5 by way of the valves is completely eliminated, there will be no admixture of cold air with the steam pressure medium in such chamber, and, therefore, sterilization of the cans will be more efficiently accomplished. In this manner, the running time of the cooker can be shortened considerably with an assurance that the canned goods will be properly processed and the amount of steam under pressure supplied to the chamber will accordingly be reduced.
While a preferred structure for fulfilling the objects of this invention has been specifically described in conjunction with the particular form of cooking and cooling apparatus illustrated, it will be understood that various modifications and alterations may be made without departing from the spirit of the invention. I, therefore, desire to avail myself of all modifications and alterations coming within the scope of the present invention as defined in the accompanying claims.
Having thus described my invention, what I claim as new and desire to protect by- Letters Patent is:
1. In combination with a pressure treating'apparatus including a pressure treating chamber, a valvefor admitting articles to 'or discharging them from the chamber, comprising a housing ets during the introduction of treating medium into the same for ejecting air therefrom prior to communication of said pocket with said chamher.
2. In a pressure treating apparatus having a chamber containing heat treating medium and a valve for admitting articles to or discharging them from said chamber, said valve comprising a housing provided with a cylindrical surface and having inlet and outlet openings therein and enclosing a rotary turret having an article carrying pocket in its periphery alternately communicable with the interior and exterior of said chamber through said openings, sealing means intermediate said housing and turret, a conduit extending from said chamber to said housing for discharging heat treating medium into said pocket as it approaches said chamber, and means for venting said pocket while it receives heat treating medium from-said conduit for ejecting the air from said pocket prior to its communication with said chamber.
3. A valve for a pressure treating chamber comprising a housing having an inlet and an outlet opening, one communicating with the interior of said chamber and the other communicating with the exterior of said chamber, a rotary turret in said housing having a pocket for receiving an article at one of said openings and for discharging the article at the other of said openings, said valve having means intermediate said housing and turret for sealing the pocket therein during its movement between said openings, means for injecting a charge of pressure treating medium into said pocket as it approaches communication with the interior of said chamber and for simultaneously venting said pocket for ejecting air therefrom prior to communication of the pocket with said chamber.
PAUL C. WILBUR.
REFERENCES CITED The following references are of record in the file of this patent:
UNITED STATES PATENTS Number Name Date 1,327,540 Fooks Jan. 6, 1920 1,976,754 Thompson .J Oct. 16, 1934 2,267,346 Thomas Dec. 23, 1941 2,393,997 Lehmann Feb. 5, 1946
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Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2849944A (en) * 1953-10-19 1958-09-02 Wilbert W Prickett Can retort
US3250406A (en) * 1963-12-30 1966-05-10 Swift & Co Article lock apparatus
US3528827A (en) * 1968-12-19 1970-09-15 Fmc Corp Micro-preheating of containers
US3793939A (en) * 1971-09-28 1974-02-26 Hero Conserven Installation for sterilizing packages filled with materials, especially foodstuffs or semi-luxuries
US3894926A (en) * 1973-02-09 1975-07-15 Lee Jau Yien In-out transporter for an enclosed chamber
US4015935A (en) * 1974-12-02 1977-04-05 Aktiebolaget Electrolux Method and apparatus for feeding and discharging a continuously operating autoclave
US5161457A (en) * 1989-12-18 1992-11-10 Don Evans & Associates, Inc. Hydrostatic cooker discharge
US5170878A (en) * 1989-12-18 1992-12-15 Don Evans & Associates, Inc. Method of hydrostatic cooker discharge
US5458261A (en) * 1993-03-19 1995-10-17 Veltman; Joost Sterilizer with reduced surface contamination
NL1014179C2 (en) * 1999-02-05 2001-06-26 Fmc Corp Atmospheric rotary feeder and discharge carousel valve and method.
US20060042473A1 (en) * 2004-08-27 2006-03-02 Silvestrini Jesus A Thermal conditioning system having continuous conveyor
US20070175884A1 (en) * 2006-01-31 2007-08-02 Atul Saksena Steam cooker with steam delivery device

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1327540A (en) * 1919-04-08 1920-01-06 Nelson H Fooks Valve
US1976754A (en) * 1932-01-26 1934-10-16 Fmc Corp Pressure cooker, cooler, and the like
US2267346A (en) * 1939-10-31 1941-12-23 Thomas Lee Rotary valve for retorts
US2393997A (en) * 1941-12-11 1946-02-05 American Can Co Transfer mechanism

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1327540A (en) * 1919-04-08 1920-01-06 Nelson H Fooks Valve
US1976754A (en) * 1932-01-26 1934-10-16 Fmc Corp Pressure cooker, cooler, and the like
US2267346A (en) * 1939-10-31 1941-12-23 Thomas Lee Rotary valve for retorts
US2393997A (en) * 1941-12-11 1946-02-05 American Can Co Transfer mechanism

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2849944A (en) * 1953-10-19 1958-09-02 Wilbert W Prickett Can retort
US3250406A (en) * 1963-12-30 1966-05-10 Swift & Co Article lock apparatus
US3528827A (en) * 1968-12-19 1970-09-15 Fmc Corp Micro-preheating of containers
US3793939A (en) * 1971-09-28 1974-02-26 Hero Conserven Installation for sterilizing packages filled with materials, especially foodstuffs or semi-luxuries
US3894926A (en) * 1973-02-09 1975-07-15 Lee Jau Yien In-out transporter for an enclosed chamber
US4015935A (en) * 1974-12-02 1977-04-05 Aktiebolaget Electrolux Method and apparatus for feeding and discharging a continuously operating autoclave
US5161457A (en) * 1989-12-18 1992-11-10 Don Evans & Associates, Inc. Hydrostatic cooker discharge
US5170878A (en) * 1989-12-18 1992-12-15 Don Evans & Associates, Inc. Method of hydrostatic cooker discharge
US5458261A (en) * 1993-03-19 1995-10-17 Veltman; Joost Sterilizer with reduced surface contamination
NL1014179C2 (en) * 1999-02-05 2001-06-26 Fmc Corp Atmospheric rotary feeder and discharge carousel valve and method.
US20060042473A1 (en) * 2004-08-27 2006-03-02 Silvestrini Jesus A Thermal conditioning system having continuous conveyor
US7337707B2 (en) 2004-08-27 2008-03-04 Jesus Antonio Silvestrini Thermal conditioning system having continuous conveyor
US20070175884A1 (en) * 2006-01-31 2007-08-02 Atul Saksena Steam cooker with steam delivery device

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