CN1038970A - Reduce the circulatory system and the method for foaming in the lubricating arrangement of printing machine - Google Patents
Reduce the circulatory system and the method for foaming in the lubricating arrangement of printing machine Download PDFInfo
- Publication number
- CN1038970A CN1038970A CN 89100238 CN89100238A CN1038970A CN 1038970 A CN1038970 A CN 1038970A CN 89100238 CN89100238 CN 89100238 CN 89100238 A CN89100238 A CN 89100238A CN 1038970 A CN1038970 A CN 1038970A
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- China
- Prior art keywords
- liquid
- hole
- conduit
- backhaul
- soaks
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F33/00—Indicating, counting, warning, control or safety devices
- B41F33/0054—Devices for controlling dampening
Abstract
A kind of water of circulating in the printing machine or water and isopropyl alcohol of making soaks the circulatory system that liquid reduces foaming, comprises a holdup pan to exhaust backhaul conduit relief liquor stream.The air that the exhaust duct discharging is pumped into the circulatory system makes foaming reduce to minimum.One liquid storage tube is placed in the lower position of the circulatory system, to prevent that air is entrained into system between the starting period.Soak liquid and draw from liquid storage tube by adjusting to the Venturi tube with q.s suction, this attraction will make liquid discharge the storage pipe, and can not suck the circulatory system to air from holdup pan.Have a hole in the Venturi tube at least, and preferably have two holes.The circulatory system increases the flow velocity that soaks liquid, and foaming reduces, and therefore, the temperature that runs through the holdup pan entrance and exit increases progressively and will be reduced to 1/2 of prior art (temperature increases progressively).
Description
The present invention relates to the damping device of printing machine.
In high-speed press, as (web offset Lithogr aphic presses) in the roll web offset duplicator, damping device is added on the pressing plate in order to the thin layer that soaks liquid is coated with.Soak normally water of liquid, or the mixture of water, chemical substance and isopropyl alcohol.Isopropyl alcohol is easier to flowing fluid ratio and compares unfertile land to be dispersed on the pressing plate in order to reduce to soak the surface tension of liquid.After damping device soaks plate, again printing ink is coated on the plate, is coated with China ink to prevent the pressing plate part.
Generally, damping device comprises the holdup pan of an opening, and this dish has the inlet and that the liquid that soaks liquid is flow through and exports and a water pond cylinder is rotated therein.The water pond cylinder has glued one deck and has soaked liquid film and this film is transported to a counterrotating cylinder that is in contact with it and make this film attenuate; Before this film was put on pressing plate, at least more than one cylinder soaked liquid in order to further attenuate usually.
In the industrial damping device of knowing, soaking liquid is to be drawn from holdup pan by the backhaul conduit by the suction that the Venturi tube in the cooling unit produces.Soak liquid and flow through a filter,, in the refrigeration container of cooling unit, cool off then to remove Soft flocks, dust, fiber and the printing ink that soaks in the liquid.Soak liquid and then be extracted into a current divider from the container pump, this current divider feeds back to holdup pan to a part of soaking liquid, and a part of soaking liquid is flow through Venturi tube, produces suction in the backhaul conduit.The neck of Venturi tube has a single hole, and its size is convenient to the flow velocity of pump is provided the vacuum of greatest measure.Soak the liquid specific gravity tester and isopropyl alcohol instrumentation unit is configured between delivery side of pump and the holdup pan, soak the water predetermined in the liquid and the degree of mixing of isopropyl alcohol to keep.
For the sort of known damping device, found in the circulatory system to form foam and bubble, also often take place and can suck holdup pan outlet and aggregation to the air above the opening holdup pan in the circulatory system.This situation will produce two problems.
The problem that bothers most that air is entrained into the circulatory system is can cause the foaming of soaking liquid when air flows through Venturi tube and filter.The foaming of soaking liquid causes direct printing quality problem.In damping device, in holdup pan, foaming has hindered the liquid that soaks on the pressing plate smoothly to scatter, and produces the printing quality of unacceptable clumsiness especially.In addition, foam will cause the mistake measurement of soaking the liquid specific gravity tester.Carry bubble in the liquid secretly because soak, soak the liquid specific gravity tester and will measure one and have more low-gravity liquid that soaks, and therefore the isopropyl alcohol than needed lower quantity is calculated into system, cause the further deterioration of soaking liquid dissemination and printing quality.
Another problem that air is entrained into system is the potential impact that produces bubble in the backhaul conduit, and bubble can hinder the outflow of soaking liquid in the holdup pan, causes to overflow and the spreading unchecked of printing office ground.
Should be appreciated that will reduce the foaming problem owing to soak the useful effect of the surfactant in the liquid, so above-mentioned foaming problem, the occasion that the amount of the isopropyl alcohol in soaking liquid reduces is the most general.However, find that foaming still can take place even isopropyl alcohol has higher concentration.
Solution for these problems had been done research.For example, the size of holdup pan outlet can increase on diameter, and still, this change in size can involve the remodeling to the costliness of existing printing machine member.Can add a kind of non-blowing agent to soaking in the liquid; But, do the quality that can influence attack solution on the contrary like this.
The reduction of soaking flow rate of liquid can reduce the foaming of system.But, reduce flow velocity like this and will cause other problems.Constant contact between the swing roller produces a large amount of frictional heats, and promptly frictional heat causes between the entrance and exit of holdup pan and soaks the sizable temperature difference of liquid.In soaking liquid, this temperature difference of end to end from dish causes its viscosity-modifying soaking when liquid flows through dish.Therefore, have than outlet side at the entrance side of dish and more to soak liquid and glued, cause the deviation of printing printing quality by the cylinder in the dish.The flow through flow velocity of holdup pan of liquid is lower soaking, and it is more serious that this problem becomes.
In addition, the uneven distribution relevant with the low flow velocity that soaks liquid can cause that the printing worker increases the amount of isopropyl alcohol in soaking liquid, to try hard to obtain to soak preferably the distribution of liquid.But the high value of isopropyl alcohol causes potential health problem to the printing worker in wet liquid, and can violate the danger of effluent control criterion and increase fire and blast.
The objective of the invention is for a kind of circulatory system and method that reduces foaming in the printing machine damping device is provided.Another purpose of the present invention is the minimizing that this foaming is provided under than the higher flow velocity of existing possible flow velocity.
These purposes, and from following explanation, can become significantly other purpose, being obtained by the circulatory system, the circulatory system comprises a holdup pan, the every end of this holdup pan is provided with one and soaks the entrance and exit that liquid flows through.One backhaul conduit is connected to the outlet of holdup pan; This backhaul conduit is provided with an exhaust duct in the downstream of outlet, and this exhaust duct can be overflowed the air of carrying secretly from conduit.The backhaul conduit preferably has at least 5/8 inch internal diameter.Exhaust duct is placed near exporting the downstream in the scope in 24 inches in outlet downstream, preferably is on the vertical cross-section of conduit.Return a pipe introducing holdup pan and can be contained in the exhaust duct, make liquid be back to the outlet of holdup pan.
One liquid storage tube can be made of the part of the backhaul conduit that forms inverted Ushaped loop, is arranged on the downstream of exhaust duct, the minimum position of backhaul conduit.Soak liquid and from liquid storage tube and backhaul conduit, draw, and flow through filter element by Venturi tube.Venturi tube provides vacuum to liquid storage tube, adjust to be enough to draw from liquid storage tube to soak liquid, but unlikely air is entrained into is in the soaking in the liquid of holdup pan outlet.Venturi tube has as the inlet in first hole with as the neck in second hole.The backhaul conduit is connected with the downstream in Venturi tube second hole, and the vacuum that forms in the backhaul conduit attracts to soak liquid from liquid storage tube and backhaul conduit.The internal diameter in first hole is about 0.5-1.25 with the ratio of the internal diameter in second hole.
One is equipped with the container of cooling device within it, and it accommodates the liquid that soaks from filter.Then, one pump is extracted into current divider from container soaking liquid, this current divider then is transported to Venturi tube to the part of the liquid of pump suction, make in the backhaul conduit and produce vacuum, and another part of liquid turns back to the holdup pan inlet and uses with supply plate.
Fig. 1 is the schematic diagram of the circulatory system of the present invention.
Fig. 2 is the perspective view of the circulatory system of the present invention.
Fig. 3 is the sectional view of Venturi tube of the present invention.
Fig. 4 is the sectional view of an embodiment of exhaust duct of the present invention.
The present invention is described further by accompanying drawing now.
Consult Fig. 1 and 2, the circulatory system 10 comprises that the opposite end of holdup pan 20 these dishes 20 of a standard has an inlet 22 and one outlet 24.The liquid that soaks in the storage dish can be through outlet inflow backhaul conduit 26, and general, the backhaul conduit is a kind of flexible pipe, preferably has 5/8 inch internal diameter, can make downward liquid flow, and any stranded bubble (air bubble) is moved upward.
Though learn, the exhaust duct 28 of easily assembling is shown in Figure 4 the sort of, a sleeve pipe 30 that has an exhaust branch pipe 32 of outside sensing just, and exhaust duct 28 can be taked multiple embodiment.Sleeve pipe 30 is fixed so that make conduit 26 push respectively holding also of sleeve pipe 30 according to the certain size manufacturing.The blast pipe of introducing and be fed to holdup pan 20 from exhaust branch pipe 32 can recycle the liquid or the foam that flow out through blast pipe the circulatory system.
Generally, backhaul conduit 26 continues to receive bottom (ground level) downwards from exhaust duct 28.Sealing liquid storage tube 36 is installed in this low position of backhaul conduit as the inverted U-shaped ring 37 in the backhaul conduit 26.During initial launch, storage pipe 36 impels the discharging of air in the circulatory system, will explain below about the situation of this respect.
Soak liquid and extracted out from container 42 by pump 45, pump is generally a kind of normal pressure pump resemble the centrifugal pump.Soak liquid and be sent to current divider 46, the part that current divider is then exported pump flows to Venturi tube another part and then flows to feed lines 60, introduces the inlet 22 of holdup pan 20.The thin layer that soaks liquid gathers and puts on platen roller 48 by the cylinder in the holdup pan 47.
With the prior art circulatory system by comparison, the Venturi tube purpose is to be used for producing maximum vacuum effect in the prior art, the present invention uses the Venturi tube that has adjusted, the vacuum that produces is enough to soak liquid from the lowest part bit extraction of backhaul pipeline, and does not make air bring the circulatory system into from holdup pan.Use the Venturi tube of single hole and can do design like this and adjustment, and be counted as a part of the present invention.Yet the Venturi tube that is provided with two holes has the bigger ability of adjusting vacuum capacity by the specific arrangements of backhaul conduit.
In optimum implementation, as shown in Figure 3, Venturi tube 38 has the liquid inlet 50 with first hole 52.Second hole can be made of the neck 54 of Venturi tube 38.The internal diameter in first hole is about 0.5-1.25 with the ratio of the internal diameter in second hole, has therefore created condition for the vacuum conditions of broad range.In a kind of typical devices, first hole has the internal diameter of 0.15-0.25 inch, and the neck 54 of Venturi tube has the internal diameter between the 0.20-0.30 inch.The optimum aperture is 0.2 inch for first hole correspondingly and is 0.25 inch for neck aperture.Have been found that the aspiration that backhaul inlet 40 can provide a kind of balance that is combined in these holes, make and soak liquid and can flow through system, and do not cause air to suck the circulatory system from storage pipe 36.As by the Connecticut State, Si Tansite, Baldwin technology company produce and market soak liquid specific gravity tester and isopropyl alcohol measuring device 56, can be installed in current divider 46 places.
In use, the circulatory system of the present invention has obviously been got rid of the foaming problem that is taken place in the prior art system.Because exhaust duct just flows out the air of being carried secretly from system before the turbulation in Venturi tube filter and pump.Compared with prior art for realizing the maximum single hole Venturi tube that designs of attracting, the diplopore Venturi tube attenuating in the backhaul pipeline then is provided attraction; This attraction of having lowered guarantees enough suction, aspirates liquid storage tube and backhaul conduit soaking liquid, rather than powerfully must even air be brought into soaking in the liquid of system.The circulatory system 10 has made the holdup pan flow velocity be increased to about 0.5-0.7 gallon (GPM) from the about 0.25-0.3 gallon of the per minute flow velocity (GPM) that the prior art system is reached, and avoided under high like that flow velocity foaming that is taken place in the prior art equipment and the problem of spreading unchecked.Because the high flow rate that soaks liquid that the present invention obtained, the temperature from the inlet of holdup pan to outlet increase progressively with reduce to that the prior art temperature increases progressively about 1/2.
Claims (38)
1, a kind of damping device of printing machine, described damping device comprises: the holdup pan of an opening, this holdup pan are respectively equipped with at its two ends as an inlet and an outlet of soaking liquid 1; Be used for making and soak liquid and be directed to equipment on the printing forme from described holdup pan; The one backhaul conduit that is connected with described outlet; For filtering the described equipment that liquid is used that soaks, this equipment is placed in the downstream of said holdup pan and is connected with described backhaul conduit; As making described liquid flows out and flow through described filter plant from described holdup pan the device that soaks;
One exhaust duct is arranged on the described backhaul conduit, be positioned at the downstream of described outlet, the described vacuum that makes the device that soaks liquid flow adjust to generation is enough to draw from described backhaul conduit soaks liquid, and does not make air enter the backhaul conduit from described holdup pan outlet.
2, damping device according to claim 1, wherein exhaust duct is placed in the downstream of described outlet up to about 24 inches places.
3, damping device according to claim 1, wherein exhaust duct also comprises a pipe, described holdup pan is introduced and be fed to this pipe.
4, damping device according to claim 1, wherein liquid storage tube is installed in the downstream of described exhaust duct.
5, damping device according to claim 4, wherein institute's liquid storage tube is to be made of the inverted U loop in the described backhaul conduit.
6, damping device according to claim 1, the wherein said liquid flow device that soaks comprises:
-hold the described container that soaks liquid that has filtered;
-make the described pump that liquid flows out that soaks from described container;
The current divider of the output of the described pump of-acceptance;
-Venturi tube, it receives a described part of soaking liquid from described current divider, and described another part that soaks liquid flows to described holdup pan inlet from described current divider.Described Venturi tube has a hole at least in it, adjusting to provides enough vacuum to described backhaul conduit, with the described liquid that soaks of discharge from described conduit, and does not make air be entrained into described backhaul conduit; Described backhaul conduit is connected to the downstream at least one hole of described Venturi tube.
7, damping device according to claim 6, wherein said Venturi tube have two holes, and the first described hole is arranged on the inlet of described Venturi tube, and the second described hole is made of the neck of described Venturi tube.
8, damping device according to claim 7, the internal diameter in wherein said first hole is about 0.5-1.25 with the ratio of the internal diameter in second hole.
9, damping device according to claim 8, the internal diameter in wherein said first hole is about 0.8 with the ratio of the internal diameter in second hole.
10, damping device according to claim 7, first hole of wherein said Venturi tube has the internal diameter of about 0.15-0.25 inch, and described second hole has the internal diameter of about 0.20-0.30 inch.
11, damping device according to claim 10, first hole of wherein said Venturi tube has about 0.2 inch internal diameter, and described second hole has about 0.25 inch internal diameter.
12, a kind of circulatory system of the damping device as printing machine comprises:
-holdup pan, this holdup pan have an inlet and an outlet that is provided with at its two ends as soaking liquid;
-be connected to the backhaul conduit of described holdup pan;
-being placed in the exhaust duct that is positioned at described outlet downstream on the described backhaul conduit, described exhaust duct comprises that one introduces and be fed to the pipe of described holdup pan;
-liquid storage tube is positioned at the downstream of described exhaust duct and is attached to described backhaul conduit;
-the Venturi tube that is connected with described liquid storage tube, said Venturi tube is provided with its inlet that contains first hole, with and contain the neck in second hole, described backhaul conduit is connected to the downstream in described Venturi tube second hole, thus, producing in described liquid storage tube and backhaul conduit is enough to the described liquid that soaks is drawn into vacuum the Venturi tube from liquid storage tube, and described vacuum is not enough in the holdup pan exit air is entrained into described soaking in the liquid;
For filtering the described equipment that liquid is used that soaks;
-contain the described container that soaks liquid that has filtered;
-make the described pump that liquid flows out described container that soaks;
The current divider of the output of the described pump of-reception; A described part of soaking liquid flows to the inlet of described Venturi tube from described current divider, and described another part that soaks liquid then flows to described holdup pan inlet.
13, the circulatory system according to claim 12, wherein said exhaust duct are placed in the downstream of described outlet up to about 24 inches places.
14, the circulatory system according to claim 12, wherein the backhaul conduit has at least 5/8 inch internal diameter.
15, the circulatory system according to claim 12, wherein said exhaust duct are placed on the cross section of perpendicular of described backhaul conduit.
16, the circulatory system according to claim 12, the internal diameter in wherein said first hole is about about 0.5-1.25 with the ratio of the internal diameter in second hole.
17, the circulatory system according to claim 12, the internal diameter in wherein said first hole is about 0.8 with the ratio of the internal diameter in second hole.
18, the circulatory system according to claim 12, first hole of wherein said Venturi tube has the internal diameter between the 0.15-0.25 inch, and described second hole has the internal diameter between the 0.20-0.30 inch.
19, the circulatory system according to claim 18, first hole of wherein said Venturi tube has about 0.20 inch internal diameter, and described second hole has about 0.25 inch internal diameter.
20, the circulatory system according to claim 12, wherein said liquid storage tube is made up of an inverted U loop that forms in described backhaul conduit.
21, a kind of printing machine soaks the circulatory system of liquid, comprising:
-soak the holdup pan of liquid, have an inlet and an outlet respectively at its two ends;
-be connected to the backhaul conduit of described holdup pan outlet;
-exhaust duct, this exhaust duct are placed in the downstream that is positioned at described outlet on the described backhaul conduit;
Make the described liquid that soaks flow through the described circulatory system and provide and be enough to from described backhaul conduit, draw the vacuum of soaking liquid, and air is not entrained into the equipment of described backhaul conduit from described holdup pan outlet.
22, the circulatory system according to claim 21, wherein, described exhaust duct is placed in the downstream of described outlet up to about 24 inches places.
23, the circulatory system according to claim 21, wherein liquid storage tube is arranged on the downstream of exhaust duct.
24, the circulatory system according to claim 23, wherein said liquid storage tube is made up of an inverted U loop that forms in described return duct is led.
25, the circulatory system according to claim 21, the wherein said liquid flow device that soaks comprises:
-for the described container that soaks liquid of splendid attire;
-make the described pump that liquid flows out from container that soaks;
The current divider of the output of the said pump of-acceptance;
-Venturi tube, receive a described part of soaking liquid from described current divider, and described another part that soaks liquid flows to described holdup pan inlet from described current divider, described Venturi tube, have a hole in this pipe at least, adjusting to provides enough vacuum to described backhaul conduit, with the described liquid that soaks of suction from described conduit, and avoid air to be entrained into described backhaul conduit, described backhaul conduit is connected with the downstream at least one hole of described Venturi tube.
26, the circulatory system according to claim 25, wherein said Venturi tube have two holes, and first hole is to be placed in the inlet of described Venturi tube, and second hole is made of the neck of described Venturi tube.
27, the circulatory system according to claim 26, the ratio of the internal diameter in the internal diameter in wherein said first hole and second hole is between about 0.5-1.25.
28, the circulatory system according to claim 26, first hole of wherein said Venturi tube has the internal diameter between the 0.15-0.25 inch, and there is the internal diameter between the 0.20-0.30 inch in described second hole.
29, a kind of method that foams in the damping device of printing machine that reduces comprises that the holdup pan of an opening, this holdup pan are respectively equipped with an inlet and an outlet of soaking liquid at its two ends; As being transported to equipment on the printing forme from holdup pan soaking liquid; One is connected to the backhaul conduit of described outlet; For filtering the described equipment that soaks liquid, this equipment is placed in the downstream of described holdup pan and is connected with the backhaul conduit; As making described liquid flows out and flow through filter plant from holdup pan the device that soaks.Described method comprises the following steps.
Make the backhaul conduit from the downstream one of described outlet () the some emission gases;
In described backhaul conduit, provide vacuum, adjust to and from described backhaul conduit, draw the described liquid that soaks, and do not make air be entrained into the outlet of holdup pan.
30, the circulatory system according to claim 29, wherein said vacuum is provided by Venturi tube, this pipe inside has a hole at least, adjust to and in the backhaul conduit, apply enough vacuum, so that liquid is soaked in suction from described backhaul conduit, and does not make air be entrained into described backhaul conduit.Described backhaul conduit is connected with at least one hole in described Venturi tube downstream, and described Venturi tube is connected with described liquid flow device.
31, the circulatory system according to claim 30, wherein said Venturi tube have two holes, and described first hole is positioned at the inlet of described Venturi tube, and second hole is made of the neck of described Venturi tube.
32, method according to claim 31, the internal diameter in wherein said first hole is about 0.5-1.25 with the ratio of the internal diameter in second hole.
33, method according to claim 32, the internal diameter in wherein said first hole is about 0.8 with the ratio of the internal diameter in second hole.
34, a kind of method that reduces the method foaming of printing machine damping device comprises: a holdup pan, this holdup pan are respectively equipped with an outlet and an inlet that soaks liquid at its two ends; One is connected to the backhaul conduit of described holdup pan outlet; One liquid storage tube, this liquid storage tube are placed in the downstream of described exhaust duct and are connected to described backhaul conduit; One Venturi tube that is connected with described liquid storage tube; Filter the described equipment that soaks liquid; Hold the container that soaks liquid that has filtered; Make described the wander about as a refugee pump of container of liquid that soaks; And the current divider that receives the output of this pump, a part of soaking liquid that flows out from current divider flows to the inlet of Venturi tube, and another part flows to the holdup pan inlet; Described method comprises the following steps.
Make described backhaul conduit from described outlet downstream one () some emission gases to holdup pan;
Adjust described Venturi tube, forming to have in described liquid storage tube and backhaul conduit is enough to the described liquid that soaks is drawn into the vacuum of Venturi tube from described liquid storage tube, but described vacuum also is not enough in the holdup pan exit air is entrained into and soaks in the liquid.
35, method according to claim 34, wherein said Venturi tube have its inlet that includes first hole, with and include the neck in second hole, described backhaul conduit is connected to the downstream in Venturi tube second hole.
36, method according to claim 35, wherein said release are positioned at the downstream of described outlet up to about 24 inches.
37, method according to claim 35, wherein the internal diameter in first hole is about 0.5-1.25 with the ratio of the internal diameter in second hole.
38, according to the described method of claim 37, wherein the internal diameter in first hole is about 0.8 with the ratio of the internal diameter in second hole.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US14299388A | 1988-01-12 | 1988-01-12 | |
| US142,993 | 1988-01-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1038970A true CN1038970A (en) | 1990-01-24 |
Family
ID=22502109
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 89100238 Pending CN1038970A (en) | 1988-01-12 | 1989-01-11 | Reduce the circulatory system and the method for foaming in the lubricating arrangement of printing machine |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0325021A3 (en) |
| JP (1) | JPH01180341A (en) |
| CN (1) | CN1038970A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108705848A (en) * | 2018-04-28 | 2018-10-26 | 重庆川之舟印务设计有限公司 | Fountain solution purifier |
| CN111114099A (en) * | 2020-02-06 | 2020-05-08 | 杜清锋 | Printing device for paperboards |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4038021A1 (en) * | 1990-11-29 | 1992-06-04 | Edelmann Gmbh & Co Kg | Feed-back for moisture medium in wet offset printing machine - involves return flow pipe from machine discharging over fluid level in storage tank |
| DE4211656A1 (en) * | 1992-04-07 | 1993-10-14 | Technotrans Gmbh | Process and device for recycling polluted process water |
| US5622620A (en) * | 1994-07-08 | 1997-04-22 | Pall Corporation | Apparatus for treating fountain solution |
| US6293199B1 (en) * | 2000-07-07 | 2001-09-25 | Baldwin Graphicssystems, Inc. | Printing press circulation system |
| US6651555B2 (en) * | 2000-09-25 | 2003-11-25 | Day International, Inc. | Dampening solution recirculator |
| US8763617B2 (en) | 2009-06-24 | 2014-07-01 | Saint-Gobain Abrasives, Inc. | Material removal systems and methods utilizing foam |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3352317A (en) * | 1964-12-09 | 1967-11-14 | Dahlgren Mfg Company Inc | Dampening fluid cooling and circulating apparatus for lithographic offset press dampening device |
| IT1180802B (en) * | 1984-08-01 | 1987-09-23 | Web Italia Srl | SYSTEM FOR THE CONTINUOUS FEEDING OF THE WATERING SOLUTION IN THE OFFSET PRINTING PROCESSES |
-
1988
- 1988-08-23 EP EP88307801A patent/EP0325021A3/en not_active Withdrawn
- 1988-09-27 JP JP24219288A patent/JPH01180341A/en active Pending
-
1989
- 1989-01-11 CN CN 89100238 patent/CN1038970A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108705848A (en) * | 2018-04-28 | 2018-10-26 | 重庆川之舟印务设计有限公司 | Fountain solution purifier |
| CN111114099A (en) * | 2020-02-06 | 2020-05-08 | 杜清锋 | Printing device for paperboards |
| CN111114099B (en) * | 2020-02-06 | 2021-10-22 | 台州市雨免电子商务有限公司 | Printing device for paperboards |
Also Published As
| Publication number | Publication date |
|---|---|
| EP0325021A3 (en) | 1990-03-21 |
| JPH01180341A (en) | 1989-07-18 |
| EP0325021A2 (en) | 1989-07-26 |
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| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
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