US3490482A - Liquid transfer system - Google Patents

Liquid transfer system Download PDF

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Publication number
US3490482A
US3490482A US724114A US3490482DA US3490482A US 3490482 A US3490482 A US 3490482A US 724114 A US724114 A US 724114A US 3490482D A US3490482D A US 3490482DA US 3490482 A US3490482 A US 3490482A
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reservoir
container
liquid
primary
conduit
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US724114A
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English (en)
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Elihu L Sachs
Edward Mezynski
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ELIHU L SACHS
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ELIHU L SACHS
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    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03D—APPARATUS FOR PROCESSING EXPOSED PHOTOGRAPHIC MATERIALS; ACCESSORIES THEREFOR
    • G03D3/00—Liquid processing apparatus involving immersion; Washing apparatus involving immersion
    • G03D3/02—Details of liquid circulation
    • G03D3/06—Liquid supply; Liquid circulation outside tanks
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/2931—Diverse fluid containing pressure systems
    • Y10T137/3109—Liquid filling by evacuating container
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/2931—Diverse fluid containing pressure systems
    • Y10T137/3115—Gas pressure storage over or displacement of liquid
    • Y10T137/3127—With gas maintenance or application
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/86187—Plural tanks or compartments connected for serial flow
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/86187—Plural tanks or compartments connected for serial flow
    • Y10T137/86196—Separable with valved-connecting passage

Definitions

  • a liquid transfer system including a reservoir, a liquid utilization container and a pair of valved conduits, one conduit adapted to provide fluid flow communication in both directions between the reservoir and the container, the other adapted to provide fluid flow communication only between the container and the reservoir, the fluid flow being effected by a reservoir pressure varying means.
  • This invention relates to liquid transfer systems and, more particularly, to film processing apparatus including a system for transferring processing liquids from a reservoir to a film developing container and, after a predetermined period of time, returning the liquid to its reservoir or other desired destination.
  • a still further object of this invention is to provide a liquid transfer system which prevents the intermixing of the several liquids employed and which avoids the flow of processing liquids through or in contact with moving parts.
  • this invention in one form, comprises a film developing container having a sloped floor and a light-proof, vented, closure.
  • a plurality of processing liquids are located each within its own reservoir with each reservoir being in fluid flow communication with the film developing container by means of a pair of valved conduits; i.e. a primary liquid transfer conduit and a scavenger conduit.
  • Each reservoir is connected to a conventional variable pressure source which selectively subjects the reservoirs to super-atmospheric and subatmospheric pressure, the former being used to transfer the liquid from the reservoir to the film developing container through the primary conduit and the latter being used to return the liquid to the reservoir through the primary and scavenger conduits.
  • the pressure source communication with each reservoir is controlled 'by a solenoid valve which is actuated by a conventional timer.
  • the operator After closing the film developing container, the operator merely trips the start switch of the system and the film is then automatically developed as follows.
  • the timer starts the pressure source, such as an air compressor, and actuates the appropriate valves to supply pressurized air to the appropriate reservoir containing the processing liquid to be used initially, such as the developer liquid.
  • the primary conduit valve being open, permits the processing liquid to be forced through the primary conduit into the film developing container while the valve in the secondary conduit, or scavenger tube, being a check valve, prevents the flow of air and liquid through the secondary conduit to the film developing container.
  • the valve in the primary conduit substantially obturates the conduit, preventing flow of substantial quantities of air through the conduit into the film developing container but allowing a small quantity of air to flow into the container in order to continuously agitate the processing liquid.
  • Means such as a pressure release vent in the reservoir, also control the quantity of air which flows into the film developing container.
  • the scavenger tube has a cross-sectional area significantly smaller than the primary conduit and has one open end adjacent the lowest point of the floor of the film developing container to allow it to remove whatever remaining liquid was not removed through primary conduit.
  • the next liquid such as water for washing, is then caused to enter the film developing container in the same manner as described above. In sequence each necessary processing liquid for developing the film is admitted and removed from the film developing container until the developing, process is complete.
  • FIGURE 1 is a schematic illustration of a liquid transfer system formed in accordance with a first embodiment of this invention.
  • FIGURE 2 is a schematic illustration of a liquid transfer system formed in accordance with a second and preferred embodiment of this invention.
  • the film processing apparatus basically includes a film developing container 12 in fluid flow communication with a plurality of processing liquid reservoirs 14, 1 6, only two being illustrated although it is understood that the number of reservoirs can be one or more as required by the particular process for which the system is used.
  • a pressure source such as a conventional air compressor 18 is also in flow communication with the reservoirs to allow the reservoirs to be selectively subjected to superatmospheric and subatmospheric pressures as described below.
  • Each reservoir and its communication system with the film developing container 12 is identical and therefore the following description Will be directed to the reservoir 14 and its relationship with the film developing container 12.
  • the film developing container 12 which can be formed of stainless steel, glass, or a plastic such as polystyrene, is formed with a floor 20 being sloped toward one point to insure drainage of all of the liquid toward that low point thus facilitating removal of all liquid when so desired.
  • the side walls 22 of the container 12 are tapered downwardly toward the floor 20 so that a stand 24 can easily support the container 12. It is clear that other methods of supporting the container are suitable, such as by forming a shoulder on the outer surface of the walls against which the stand can abut.
  • the container is provided with a light-proof closure 26 having a light-proof vent 28 of conventional structure and having a primary aperture 30 and secondary aperture 32 therethrough to receive fluid transfer conduits.
  • the reservoir 14, which can also be fabricated from stainless steel, glass, or a plastic such as polystyrene, is divided into two chambers 34, 36 by a divider wall 38.
  • An aperture 40 extends through the bottom wall 42 of the reservoir 14 and receives a primary fluid transfer conduit 44 which is sealed to the bottom wall by a conventional sealing plug 46.
  • the primary conduit 44 extends from the reservoir 14 to the film developing container 12 and passes through the primary aperture 30 in the container closure 26 to which it is also sealed by a conventional sealing plug 48.
  • the primary conduit 44 terminates adjacent to the floor 20 of the container 12.
  • a cylindrical elongated valve housing 50 is received at one end by the end of the primary conduit 44 which has entered the reservoir 14 and, at its other end, passes through an aperture 52 in the reservoir divider wall 38.
  • the valve housing 50 has a first primary orifice 54 through its upper end which provides flow communication between the inside of the housing 50 and the reservoi rs first chamber 34.
  • the housing 50 has a second primary orifice 56 through its lower end which provides flow communication between the housing and the primary conduit 44.
  • a plurality of secondary orifices 58 extend through the side wall 60 of the housing and provide flow communication between the inside of the housing and the reservoirs second chamber 36.
  • the divider wall 38 is tapered toward the first primary orifice 54.
  • the housing 50 is tapered at its upper and lower ends in order to provide a seat at each end for a floating ball valve 62 confined within the housing 50.
  • the ball valve 62 floats in the processing liquid contained within the reservoir 14 and is responsive to the height of the liquid such that when the liquid rises to a certain height within the reservoir 14 the ball valve 62 obturates the first primary orifice 54 and, when the level of the processing liquid drops to a predetermined level, the ball valve 62 obturates the second primary orifice 56.
  • the method and purpose of operation of the ball valve 62 are described in detail below.
  • a secondary or scavenger conduit or tube 64 extends through an aperture 66 in one of the walls, for example the top wall, of the reservoir 14 and communicates with the first chamber 34.
  • the other end of the scavenger tube 64 passes through the secondary aperture 32 in the closure 26 of the film developing container 12 and terminates adjacent to the floor 20 at the lowest point of the floor.
  • the scavenger tube is appropriately sealed to the film developing container 12 and reservoir 14.
  • a check valve, such as a flapper valve 68, is located within the scavenger tube to permit fiow in only one direction, that direction being from the film developing container 12 to the first chamber 34 of the reservoir 14.
  • the scavenger tube 64 has a cross-sectional area significantly smaller than the primary conduit 44 to enable it to remove all of the liquid remaining in the film developing container 12 which was not removed through the primary conduit 44. It has been found that a system having a 1" primary conduit and a scavenger tube is satisfactory.
  • the end of the scavenger conduit 64 which is adjacent to the floor 20 of the container 12 is provided with a tapered nose 70 to facilitate removal of all liquid from the container 12.
  • LIQUID TRANSFERRING MEANS In order to cause the liquid in the reservoir 14 to flow from the reservoir to the container 12 and, after the liquid has remained in the container for its necessary time interval, to cause the liquid to return to the reservoir 14 an inexpensive source of pressure, such as a conventional air compressor 18, is provided. Both the high pressure side 72 and the low pressure side 74 of the compressor 18 are placed in flow communication with the first chamber 34 of the reservoir 14 by means of an air transfer duct 76.
  • vents 78 are provided on the high pressure and low pressure sides respectively of the compressor 18.
  • Remote control valves 82, 84 such as common electrically operated solenoid valves, are located at the juncture of the vents and the conduits leading to the air transfer duct 76.
  • the valves are three-way valves which either permit fluid flow communication between the compressor 18 and the air transfer duct 76 or between the compressor and the appro prlate vent.
  • the air transfer duct 76 is connected through branch pipes 86 to each of the first chambers 34 of the reservoirs 14, 16, etc. with each branch pipe 86 having an electrically operated solenoid valve 88 in the line to selectively expose the appropriate reservoir to the pressure source, that is, the compressor 18.
  • the operator merely closes a start switch 89 which, through a standard type of timing circuit, shown schematically at 90, actuates a solenoid to open the valve 88 leading to the first chamber 34 of the reservoir 14.
  • the solenoid operating the valve 84 at the low pressure side 74 of the air compressor 18 is also activated to provide communication between the low pressure side 74 and the atmosphere through the vent 80.
  • Valve 82 on the high pressure side 72 of the compressor is positioned to close the vent 78 and provide flow communication between the compressor 18 and the air transfer duct 76.
  • the compressor 18 is started and air, pressurized to approx imately 30 p.s.i.a., is pumped through the duct 76 into the first chamber 34.
  • the high pressure present in the first chamber 34 closes the check valve 68 in the scavenger tube 64 and forces the processing liquid into the film developing container 12 through the primary conduit 44.
  • the ball valve 62 substantially closes the second primary orifice 56 permitting a small quantity of air to be pumped through the primary conduit 44 into the container 12.
  • the air passing through the primary conduit continuously agitates the liquid in the container and prevents the primary conduit from serving as a siphon.
  • the pressure in the reservoir 14 is prevented from exceeding a predetermined level by a pressure relief bypass 91 extending from the air transfer duct 76 into the container 12.
  • a spring-biased check valve 92 in the bypass prevents liquid from flowing through the bypass when subatrnospheric pressure exists in the air transfer duct 76. Furthermore, the valve is set to open at a pressure in excess of the normal pumping pressure to permit bleedoif.
  • the timing circuit actuates valve 82 on the high pressure side of the compressor 18 to provide communication between the compressor and the vent 78 and, simultaneously, valve 84 is operated to close vent 80 and provide communication between the air transfer duct 76 and the low pressure side 74 of the compressor 18.
  • Continuous operation of the compressor will reduce the pressure in the reservoir 14 to subatmospheric pressure, approximately 5 p.s.i.a., in order to effect transfer of the liquid from the film developing container 12 to the reservoir 14 through both the primary conduit 44 and the scavenger conduit 64.
  • the ball valve 62 After substantially all of the liquid is removed from the film developing container 12 the ball valve 62, which has risen toward the top of the housing 50, obturates the first primary orifice 54 and the remaining liquid in the container 12 is removed through the scavenger tube 64.
  • the ball valve 62 prevents the drawing of air from the container 12 into the reservoir 14 through the primary conduit 44 which, if such were allowed to occur, would reduce the pressure differential across the scavenger conduit 64 rendering it difiicult to remove the remaining liquid in the container 12. Removal of all the liquid from the container 12 will be performed in a measured time interval after which the timing circuit will effect discontinuance of operation of the air compressor 18 and actuation of the solenoid valve 88 terminating communication between the reservoir 14 and the air transfer duct 76. The pressure in the reservoir then will rise to atmospheric pressure by virtue of the open passageway through the scavenger conduit.
  • the timing circuit sequentially opens the valve between the air transfer duct 76 and the next reservoir to be utilized such as reservoir 16, and the liquid transfer procedure described above is repeated until all of the required liquids have performed their function in the film developing container.
  • FIGURE 2 APPARATUS OF SECOND (PREFERRED) EMBODIMENT
  • FIGURE 2 operates on the same principle as the first embodiment (FIGURE 1); however, it includes several modifications and improvements.
  • the processing liquid reservoir 102 is cylindrical in form and includes tapered upper and lower ends 104, 106
  • the upper end 104 is provided with a first, 3
  • the main chamber is divided into two sections 112, 114 by a perforated member such as a screen 116.
  • a pair of ball valves 118 is placed in the main chamber 110, one ball valve 118 inthe upper section 112 and one ball valve 120 in the lower section 114.
  • the ball valves 118, 120 have a diameter larger than the apertures 122, 124 through the upper and lower ends 104, 106, respectively, of the main chamber 110.
  • a primary fluid transfer conduit 126 is connected near one end to the lower end 106 of the reservoir 102 and at its other end it extends down into a film developing container 128.
  • a drainage valve 129 is provided to allow for cleaning of the reservoir 102.
  • a scavenger tube 130 extending from the film developing container 128 into the bell mouthed chamber 108, has a check valve 132 to 1 permit flow only from the film developing container 128 toward the reservoir 102.
  • Also mounted in flow communication with the bell mouthed chamber 108 is an air transfer duct 134 which connects the chamber 108 with a compressor 136.
  • the pressure source and control system is the same as discussed above with respect to the first embodiment.
  • a thermostatically controlled heater 138 is mounted in the reservoir 102 to maintain the processing liquid stored therein at a constant temperature.
  • the film developing container 128 is essentially the same as described above and illustrated in FIGURE 1; however, it includes a fresh rinse water supply and drain to improve the film washing.
  • a water supply pipe 140 attached at its remote end to a fresh water supply (not shown), and having a remote-controlled valve 142 therein opens into the top of the container 128.
  • a drain pipe 144 having its inlet end 146 near the bottom of the container 128, empties into a drainage system, such as a sink.
  • the drain pipe 144 leaves the container 128 near the top thereof and serves as an overflow drain to permit rinse water from the supply pipe to continually flow during the film wash cycle.
  • a water reservoir with a primary conduit and scavenger tube are also used to insure quick filling and complete emptying of the developing container 128.
  • CHEMICAL INJECTION SYSTEM Another modification of this preferred embodiment is the addition of a chemical injection system 148 which provides for the introduction of a small measured quantity of a chemical solution into the developing container 128 at an appropriate time. For example, it is desirable, during the final wash cycle, to introduce certain solutions called hypoeliminators in order to reduce the washing time from fifteen minutes to about one and one-half minutes. Other solutions which might be added in this way are short-stop, hardner and wetting agents, all of which are conventional in film developing and do not, of themselves, form a part of this invention.
  • Each chemical solution is stored in a reservoir, for example, reservoir 150.
  • a supply conduit 152 leads from the reservoir to the developing container 128 and an air transfer duct 154, having a remote control valve 156, connects the reservoir 150 with the high pressure side of the compressor 136.
  • a return flow system including a scavenger tube, can be provided in the manner discussed above with reference to reservoir 102.
  • a heater 158 also can be utilized if so desired.
  • the ball valve 120 substantially obturates the aperture 124 allowing only a small quantity of air to flow into the developing container 128 for agitation purposes.
  • the ball valve 120 should be heavy enough to prevent the air entering the reservoir from dislodging the ball valve from the aperture 124. It has been found that a ball valve having a specific gravity of about 0.9 is satisfactory.
  • the timing circuit 160 effects opening and closing of appropriate valves (for details see discussion of first em- 'bodiment) to subject the reservoir 102 to subatmospheric pressure resulting in removal of the processing liquid from the container 128.
  • the liquid level will be such as to cause ball valve 118 to obturate the aperture 122, divorcing the primary conduit 126 from the reduced pressure and applying the pressure differential across the scavenger tube 130 for complete removal of the liquid.
  • Use of the two ball valves 118, 120 and screen member 116 avoids the need for a valve housing, such as housing 50 of FIGURE 1.
  • the reservoir (not shown) containing wash water is pressurized and the above operation is repeated.
  • the fresh water supply valve 142 is opened providing continuous supply of fresh water.
  • an overflow system is effected. It should be clear that the highest point on the drain pipe must be below the highest point on the primary conduit and scavenger tubes to prevent Water from flowing into the processing liquid reservoirs.
  • the timing circuit When it is desired to inject a chemical solution, such as a hypoeliminator into the developing container 128 the timing circuit effects opening of valve 156 in the air transfer duct 154. A measured quantity of chemical solution injected and control of this quantity injected is through time control of the valve 156. If the chemical solution is injected into rinse water, water supply valve 142 is closed until the solution has remained in the container 128 for its required acting time. Then the solution is removed with the rinse Water.
  • a chemical solution such as a hypoeliminator
  • the liquid transfer system of this invention requires no skill to operate and a minimum amount of supervision, the only time required being for loading of the film into the film developing container 12 and for actuating the timing circuit. The rest of the developing process occurs automatically without the need for the presence or attention of an operator.
  • the only moving parts which come in contact with the processing liquids, which are corrosive, are the floating ball valves which can be made of a plastic, such as polyethylene, which is resistant to these chemicals.
  • the maintenance problem is minimal with the only primary maintenance being the changing of the processing liquids after they have been used a certain number of times, the frequency of change being determined by the type and frequency of use of the processing liquids.
  • the apparatus is also very expensive since the liquid utilization container, the reservoirs, the primary and scavenger conduits, the ball valve and its housing, and the rest of the valves can all be made of inexpensive material.
  • the air compressor being a relatively low pressure air compressor, capable of providing pressures up to 30 p.s.i.a. is also inexpensive.
  • Each of the parts can be replaced easily thereby reducing the down time in the event of a malfunction of any part of the system. All of this is extremely important in'certain areas of use, such as in doctors and dentists Offices where X-rays are constantly being taken and must be developed with a minimum of time and attention and by someone who usually has little or no knoweldge and experience in the field of film developing, such as a nurse or doctor.
  • the need for a photographic darkroom is also eliminated since the only period of time in which the room must be dark is during loading of the film into the film developing container, and this can be eliminated by using a film of the type described in U.S. Patent 3,374,352.
  • a liquid transfer system comprising a reservoir, a liquid utilization container, a primary and a secondary conduit each adapted to provide fluid flow communication between said reservoir and said container, means for effecting transfer of a liquid between said reservoir and said container, primary valve means adapted to minimize fluid flow through said primary conduit upon transfer of a predetermined quantity of the liquid between said reservoir and said container, said secondary conduit having a cross sectional area smaller than the cross sectional area of primary conduit and having an open end adjacent to the floor of said container.
  • a system as defined in claim 1 wherein the means for effecting transfer of the liquid includes means for selectively subjecting said reservoir to superatmospheric and subatmospheric pressure.
  • valve means is liquid-quantity responsive.
  • valve means is responsive to the height of liquid present in said reservoir.
  • a system as defined in claim 2 including secondary valve means adapted to permit flow in one direction through said secondary conduit, said direction being from said container to said reservoir.
  • said reservoir comprises a first and a second chamber, said means for effecting transfer of the liquid and said secondary conduit communicating with said first chamber.
  • said primary valve means includes a valve housing, said housing having a first primary orifice providing flow communi cation between said housing and said first chamber, a second primary orifice providing flow communication between said primary conduit and said housing, and at least one secondary orifice providing flow communication between said housing and said second chamber.
  • a system as defined in claim 8 including a ball valve confined within said housing, said ball valve (a) substantially obturating said first primary orifice upon completion of the transfer of a predetermined quantity of said liquid from said container to said reservoir, and
  • Film processing apparatus comprising:
  • said reservoir includes (a) a second chamber having a tapered upper end and a tapered lower end, each of said ends having an aperture therethrough; and said primary conduit being mounted on said lower end,
  • Apparatus as defined in claim 6 including a valved fresh water supply pipe and an overflow drain, the highest point of said overflow drain being below the highest point of said primary and secondary conduits 14.
  • Apparatus as defined in claim 11 including a chemical injection system, said injection system including (a) a chemical reservoir,
  • Apparatus as defined in claim 11 including a plurality of said reservoirs each having a primary and secondary conduit in fluid flow communication with said container and wherein the means for pressurizing and depressurizing said first chamber includes valve means which sequentially subjects each reservoir in a predetermined order to superatmospheric pressure and then subatmospheric pressure and wherein said valve means is responsive to time intervals whereby said container sequentially contains a plurality of liquids in a predetermined order.
  • Apparatus as defined in claim 12 including a plurality of said reservoirs each having a primary and secondary conduit in fluid flow communication with said container and wherein the means for pressurizing and depressurizing said first chamber includes automatically operated, time controlled valve means which sequentially subjects each reservoir in a predetermined order to superatmospheric pressure and then subatmospheric pressure whereby said containers sequentially contain a plurality of liquids in a predetermined order.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Photographic Developing Apparatuses (AREA)
  • Photographic Processing Devices Using Wet Methods (AREA)
  • Treatment Of Fiber Materials (AREA)
US724114A 1968-04-25 1968-04-25 Liquid transfer system Expired - Lifetime US3490482A (en)

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US72411468A 1968-04-25 1968-04-25

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DE (1) DE1920764A1 (enrdf_load_stackoverflow)
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Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3762170A (en) * 1972-04-11 1973-10-02 D Fitzhugh Irrigation apparatus and methods
US4546750A (en) * 1984-07-12 1985-10-15 General Motors Corporation Secondary reservoir for a fuel tank
US4595474A (en) * 1983-11-14 1986-06-17 Greco Bros., Inc. Electroplating solution recovery system
US4763632A (en) * 1985-06-10 1988-08-16 Scandmec Ab Fuel collector
US5722635A (en) * 1994-10-29 1998-03-03 Eastman Kodak Company Container valve coupling
US6006398A (en) * 1998-06-29 1999-12-28 Sioux Steam Cleaner Corporation Safety shutoff system for steam cleaners and combination steam and water cleaners
US6092768A (en) * 1998-06-29 2000-07-25 Sioux Steam Cleaner Corporation Rectangular support frame for supporting and transporting components of a cleaning device
US6527007B2 (en) * 1998-12-16 2003-03-04 Carl Cheung Tung Kong Fluid transfer system
US20100044024A1 (en) * 2006-12-27 2010-02-25 John Edward Beeston Apparatus and method for controlled cooling
US20110139691A1 (en) * 2006-08-11 2011-06-16 Chaffin Mark N Pressurized wastewater effluent chlorniation system
US20180118346A1 (en) * 2016-10-31 2018-05-03 Aero Specialties, Inc. Intermittent fluid delivery system
US11162607B2 (en) * 2019-03-07 2021-11-02 Alex Harel System and method for preventing over pressure in flexible bladder tanks

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56108622A (en) * 1980-02-01 1981-08-28 Kyoei Zoki Kk Transfer device for solid material
GB8405849D0 (en) * 1984-03-06 1984-04-11 Tri Vac Dispense Ltd Liquid transfer and dispensers
GB2247050A (en) * 1990-07-20 1992-02-19 John Edward Hallam Liquid, powder, or heavier gas dispenser

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3252478A (en) * 1962-04-27 1966-05-24 Zindler Lumoprint Kg Apparatus for the wet treatment of copy material

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3252478A (en) * 1962-04-27 1966-05-24 Zindler Lumoprint Kg Apparatus for the wet treatment of copy material

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3762170A (en) * 1972-04-11 1973-10-02 D Fitzhugh Irrigation apparatus and methods
US4595474A (en) * 1983-11-14 1986-06-17 Greco Bros., Inc. Electroplating solution recovery system
US4546750A (en) * 1984-07-12 1985-10-15 General Motors Corporation Secondary reservoir for a fuel tank
US4763632A (en) * 1985-06-10 1988-08-16 Scandmec Ab Fuel collector
US5722635A (en) * 1994-10-29 1998-03-03 Eastman Kodak Company Container valve coupling
US6006398A (en) * 1998-06-29 1999-12-28 Sioux Steam Cleaner Corporation Safety shutoff system for steam cleaners and combination steam and water cleaners
US6092768A (en) * 1998-06-29 2000-07-25 Sioux Steam Cleaner Corporation Rectangular support frame for supporting and transporting components of a cleaning device
US6527007B2 (en) * 1998-12-16 2003-03-04 Carl Cheung Tung Kong Fluid transfer system
WO2002103203A3 (en) * 2001-02-08 2003-04-17 Carl Cheung Tung Kong Fluid transfer system
US20110139691A1 (en) * 2006-08-11 2011-06-16 Chaffin Mark N Pressurized wastewater effluent chlorniation system
US8192616B2 (en) * 2006-08-11 2012-06-05 Chaffin Mark N Pressurized wastewater effluent chlorination system
US20100044024A1 (en) * 2006-12-27 2010-02-25 John Edward Beeston Apparatus and method for controlled cooling
US9358597B2 (en) * 2006-12-27 2016-06-07 Siemens Plc Apparatus and method for controlled cooling
US20180118346A1 (en) * 2016-10-31 2018-05-03 Aero Specialties, Inc. Intermittent fluid delivery system
US10513337B2 (en) * 2016-10-31 2019-12-24 Aero Specialties, Inc. Intermittent fluid delivery system
US11084586B2 (en) 2016-10-31 2021-08-10 Aero Specialties, Inc. Intermittent fluid delivery system
US11162607B2 (en) * 2019-03-07 2021-11-02 Alex Harel System and method for preventing over pressure in flexible bladder tanks

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GB1232928A (enrdf_load_stackoverflow) 1971-05-26
DE1920764A1 (de) 1970-06-18

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