JPH071719A - Press with residual ink recycling device - Google Patents

Abstract

PURPOSE: To avoide the splashes and overflowing of ink and the defects concerning a printing machine. CONSTITUTION: The recycling device 12 of a residual ink of a printing machine 10 has a long scratching off roller train 14 for carrying a residual ink, a scratching off blades for removing the residual ink along the lengths of scratching off rollers 18 and a mechanical conveyor 32 for transferring the removed residual ink to a pump 54 for transferring to an ink recycling tank 16. The mechanical conveyor 32 has a plurality of flexible elements 30 or flexible vanes 30A arranged spirally round a shaft 48 provided rotatably in order to carry the removed residual ink in the region 28 of a housing 34. In addition, the mechanical conveyor 32 is rotatably mounted to the rollers.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates generally to printing presses, and more particularly to a printing press having a residual ink recycling system.

[0002]

Description of Related Art Including Information Disclosed Under 37 CFR 1.97-1.99 Printing Machine With Roller Ink Row For Printing Cut Paper Sheets From Large Paper Rolls Is well known.
It is also known in such printing press assemblies to have a device for recycling the residual ink removed from the ink carrying rollers. The lithographic printing machine assembly described in U.S. Pat. No. 4,864,925, issued on Sep. 2, 1989 to Bankanegan et al., Is opposite to the direction of rotation of the metering ink to scrape excess ink on the metering roller. It has a doctor blade fixed at an angle of. The ink is fed to a rubber pan roller and into the reservoir through its top opening. A pump draws ink from the reservoir and sends it to the mixing area. The remaining ink is mixed with fresh ink and circulated through the lithographic press machine.

[0003]

A disadvantage of this device is that the ink mixture scraped from the roller often splashes in the device as the ink drops from the roller into the reservoir. The wide opening at the top of the tanks of the Bankanegan et al. Patent causes the dropped ink to spill to other areas of the printer, causing ink loss. Splashes of printing ink on the outside of the bath create dirty print areas, which are time consuming to clean and cause waste of ink. In addition, in the Bankanegan et al. Patent and other known printing devices, the residual ink is exposed to the outside air, causing a scented fumes to circulate in the working area of the printing press. Similar mechanisms have been used with the same drawbacks to remove residual ink from the unprinted areas of the lithographic plate. Accordingly, it is a primary object of the present invention to provide a printing machine with a residual ink recycling device that avoids ink splashes, spills and related disadvantages of the printing machine.

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a printing machine having an ink roller train including elongated rollers for carrying the remaining ink along the length and an ink recycle tank, the remaining ink being drawn from the elongated rollers to the length thereof. Means for mechanically conveying the residual ink removed from the roller along its length to an ink recycling tank, and the residual ink removed along the length of the elongated roller. It is achieved by providing a printing machine featuring a residual ink recycling device having means for passing through a mechanical transport device. Further, the object of the present invention is to
In a printing machine having an ink roller row including rollers for carrying the remaining ink, there is provided a means for removing the remaining ink from the remaining ink carrying roller and a means for carrying the removed remaining ink away from the roller for recycling. Then
This is achieved by providing a printing machine featuring a residual ink recycling device, the means including an elongated screw conveyor. The purpose of the present description is also to provide a means for removing residual ink from the residual ink carrying roller and a means for recycling the removed ink in a printing machine having a row of ink rollers including a roller carrying the residual ink. Remaining ink recycling, for carrying away from a roller, comprising an elongated passage and means having a flexible member moveable within the passage for moving the remaining ink along the passage. This is accomplished by providing a printing machine featuring the device.

Furthermore, it is an object of the present invention to provide an elongated receiving housing, an elongated scraper for removing residual ink from the rollers and a residual ink in a printing machine having an ink roller row including rollers for carrying the residual ink. An elongated channel opening through a channel in the housing for receiving and receiving the residual ink received and an elongated scraper in the channel opening for receiving the residual ink removed by the scraper. And a means for mounting the housing in place relative to the ink recycling apparatus. The attainment of the objects of the invention also has a means for removing residual ink from the residual ink carrying roller in a printing press assembly having an ink roller row including the residual ink carrying roller, which means is removed for recycling. A residual housing having an elongate channel opening through the elongate channel for receiving and carrying away the remaining ink from the roller and further substantially closing the elongate channel and remaining within the elongate channel during transfer. Means for mounting the containment housing with the channel openings positioned adjacent to the remaining ink carrying rollers to enhance containment of the ink;
It is obtained by providing a printing machine featuring a residual ink recycling device.

The achievement of the object of the present invention is also achieved in a printing machine having an ink roller row including a roller for carrying the remaining ink, a recycle tank and a new ink tank, at a pump inlet connected to the new ink tank. Fluid pump for pumping the ink to the pump outlet connected to the ink recycling tank, means for flowing the residual ink removed from the roller into the pump through the pump inlet, and the residual ink in the pump. Means for inserting new ink into the pump inlet for mixing,
It is obtained by providing a printing machine featuring a residual ink recycling device in which the pump pumps a mixture of residual ink and fresh ink from the pump outlet to an ink recycling tank. Moreover, it is an object of the present invention to remove residual ink from a roller in a printing press having an ink roller row including rollers for carrying the residual ink and a new ink tank, which comprises a channel, Remaining ink recycling apparatus having an elongated accommodating housing capable of substantially sealed transfer of stored ink along a channel, and means for directly connecting the inlet of the pump to the accommodating housing for sealing transfer of the stored ink to the pump It is achieved by providing a printing machine characterized by.

[0007]

The above objects and advantageous features of the present invention will be described in more detail. Other objects and features will become apparent from the detailed description of the preferred embodiment of the invention made with reference to the two figures of the drawings. With reference to FIGS. 1 and 2, the printing press 10 comprises a roller train 14 having elongated scraping rollers 18 that carry the remaining ink 20 according to length. The ink recycling tank 16 is used to store the residual ink 20 obtained from the scraping roller 18 and recycle it via the residual ink recycling device 12. The series of inking and watering rollers consist of an ink distributor 17 which carries the printing ink to the lithographic plate cylinder. The plurality of metering pumps 21 pressure-feed the ink received from the ink recycling tank 16 in a predetermined constant amount to a series of inking sprays to distribute the ink to the rollers of the ink distributor 17. The metering pump 21 maintains a uniform amount of ink along the length of the rollers of the ink distributor 17.
The ink distributor 17 carries the main ink from the ink recycle tank 16 to the removal ink application roller train 14. For further details of an exemplary ink dispenser, reference may be made to U.S. Pat. No. 5,107,762 entitled "Ink Dampener for Lithographic Printing Machines" issued April 28, 1992 by Faddner et al.

The stripping inking roller train 14 includes a rubber roller 24 which rolls against a lithographic plate cylinder 22 and rolls over the surface of the plate cylinder that was not attached to the plate for transfer to paper. Remove the residual ink found in the image. The relatively stiff scraper roller 18 operates in conjunction with the rubber roller 24 to remove excess or residual ink from the plate cylinder. The scraping roller 18 rolls against the rubber coating against the roller 24 to remove residual ink from the rubber roller 24.
Residual ink 20 is removed from the scraping roller 18 along the length of the elongated scraping roller 18, preferably by a scraping blade 26 (FIG. 2). The scraping blade 26 removes the residual ink 20 by scraping along the surface of the scraping roller 24 while the elongated scraping roller 24 rotates. The removed residual ink 20 is carried to the channel 28 of the mechanical conveyor 32. The conveyor 32 preferably has a plurality of rotating members 30 for sweeping the removed ink through the channels. Mechanical conveyor 32 has channel area 28
The remaining ink 20 therein is carried to a fluid pump 54 connected to one end of the conveyor, and the pump 54 transfers the ink to the ink recycling tank 16. Scraping blade 26
Extend along the length of the roller 18 parallel to the central axis of the roller 18 to remove residual ink from the scraping roller 18 along its entire length. A leading edge 60 of the scraper or scraping blade 26 is provided proximate the surface of the scraper roller 18 to remove ink and guide or pass residual ink 20 into the elongated opening 42 of the mechanical conveyor 32.
Preferably, the rotating member 30 extends along the length of the scraping roller 18 to carry the removed residual ink 24 through the mechanical conveyor 32. The rotating member 30 has a rotatable shaft 48.
The shaft 48 is rotatably driven by a hydraulic motor 35 connected to the mechanical conveyor 32.

The scraping roller 18 has a pair of ends 37 and 38.
Extend between and. In the preferred embodiment, the mechanical conveyor 32 includes a housing 4 for containing the residual ink 20 that has been removed.
It is rotated to carry in the channel 28 in 0 from the end of the scraping roller 18 toward the end 37, and as described above, the housing includes an elongated scraping blade 28 to extend the length of the scraping roller 18 from the scraping roller 18. An elongated opening 42 is provided for receiving the residual ink removed along the. The scraping blade 26 is attached to the receiving housing 40 and extends outwardly from the elongated opening 42 to extend the leading edge 6
0 is positioned in a scraping relationship with the scraping roller 18. The rotating rotating member 30 removes the remaining ink 20
Of the fluid pump 5 for transporting the ink to the ink recycle tank 16 through the channel 28.
Connected to four. The pump 54 also advantageously contains ink so that it is not exposed to air or spilled. In the preferred embodiment, the elongate screw conveyor 32 comprises an elongate conveyor screw 34 constituted by a plurality of brush elements or flexible elastic filaments 30 helically arranged about a rotatably mounted shaft 48. . Shaft 48 is rotationally driven by hydraulic motor 35, which causes elongated conveyor screw 34 to rotate. The passage 28 engages a rotating brush 30 for the purpose of removing residual ink from the brush,
It has an elongated plate or discontinuity 50 extending from the inner surface 52 of the passage 28. The brush filament 30 has an elongated plate portion 50 as the shaft 48 rotates within the channel region 28.
Contact with and wipe off the remaining ink on the brush. Passage 28
The inner surface 52 of the backing carries the remaining ink 20 removed, and the brush 30 elastically engages the inner surface to move the ink along the inner surface 52 to the fluid pump 54, which causes the ink to recirculate. Transfer to.

Alternatively, the plurality of spiral array brushes may be replaced by elongated flexible resilient vanes 30A (FIG. 1) arranged in a spiral wrap about the axis of rotation 48. Preferably, the vanes 30A are made of an ink resistant strip of polymeric plastic. A plurality of screws 56 and a triangular mounting bracket 57 (FIG. 2) are provided for the elongated scraper 26 with respect to the elongated channel opening 42 for receiving the residual ink 20 removed from the roller 18 by the scraper 26. Used to attach to the elongated housing 40 in place. The elongate scraper 26 is positioned such that its leading edge 60 is located opposite the channel opening 42 so that the residual ink 20 removed falls from the elongate opening 42 into the channel 28. A pivot shaft 58 received in the hole 59 of the containing housing 40 rotatably attaches the containing housing to the remaining ink wicking roller 18. Since the scraper 26 is also mounted to the housing, it is advantageous that the scraper 26 is also adjustably pivotably mounted by the same pivot shaft 58. An elongated containment housing 40 is provided adjacent the scraping roller 18 to substantially close the elongated channel openings 42 to enhance containment of residual ink 20 within the channel region 40 and to reduce spillage during transport. . Between the scraping roller 18 and the channel opening 42, there is a predetermined minimum gap 42 which is adjusted by the rotation of the housing 40.

The printing press 10 has a new ink tank 64 for containing a new ink 70.
0 is mixed with the remaining ink 20 and temporarily stored in the ink recycling tank 16 before distribution. Fluid pump 54
The inlet 66 is directly connected to the housing 40, and the pump outlet 68 is directly connected to the ink recycling tank 16 through the closed mixed ink transfer line 67. Fresh ink 70 is carried from the ink reservoir 64 through a fresh ink transfer line 78 and inserted into the pump inlet 66 to mix with the removed residual ink 20 in the fluid pump 54. The fluid pump 54 is a motor-driven gear pump,
Completely mix the new ink with the ink and leave the remaining ink 20
And a mixture of fresh ink 70 from the pump outlet 54,
It is pressure fed to the ink recycling tank 16. The pump 54 sends the ink mixture to the ink recycling tank 16 at a flow rate of about 3 liters per minute. Ink recycling tank 16
Is a suitable pressure control source 55 and 50 psi to 60 ps
It is preferable that the metering pump 21 is pressurized by the valve 61 that operates in the range of i to provide the suction pump 21 with a stable suction pressure. The ink recycle tank 16 is a closed tank that prevents splashing of the ink mixture that is pumped into the tank and that does not expose the ink fumes to the outside air.

In the ink recycling tank 16, there is an ink sensor 72 for detecting the amount of ink in the ink recycling tank 16.
The ink sensor 72 in the pressurized recycle tank 16 opens a new ink supply valve 74 when the level of ink in the tank 16 drops to a predetermined low level.
The ink sensor 72 for level control sends a feedback electric signal to an electromagnetic actuator 75, which controls a new ink valve 74 connected to a new ink tank 64. Based on the amount of ink detected by the ink sensor 72, the electromagnetic actuator 75 causes the new ink supply valve 7 to operate.
4 is opened and closed to allow new ink to selectively flow from the new ink tank 64 to the pump inlet 66 of the fluid pump 54. The mixed ink in the closed and pressurized ink recycle tank 16 is fed to the metering pump 21 and the ink distributor 17.
And is returned to the scraping roller 18 through the ink roller row 14. While a detailed description of the preferred embodiment of the present invention has been given, it should be understood that many modifications can be made to the invention without departing from the scope of the invention as set forth in the claims. .

[Brief description of drawings]

FIG. 1 is a schematic diagram of a preferred embodiment of the printing press of the present description.

FIG. 2 is an enlarged cross-sectional view at section line II-II of the preferred embodiment of the elongated screw conveyor associated with the elongated residual ink wicking roller of the printing press.

[Explanation of symbols]

 10 Printing Machine 12 Remaining Ink Recycling Device 14 Ink Roller Row 20 Remaining Ink 26 Scraping Blade 28 Channel 40 Storage Housing 42 Elongated Opening 32 Elongate Screw Conveyor 30 Flexible Filament 48 Shaft 50 Step 54 Fluid Pump 64 New Ink Tank 66 Pump inlet 68 Pump outlet 70 New ink

─────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] May 12, 1994

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be amended] Claims

[Correction method] Change

[Correction content]

[Claims]

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Stanley Mormoto 60525 La Grange Laurel Avenue, Illinois, United States 6405 (72) Inventor Frederick Jay Whiting 60525 La Grange Howard Avenue, Illinois, USA 7965

Claims (34)

[Claims] 1. A printing press having an ink roller train including elongated rollers for carrying the remaining ink along a length, an ink recycling tank, and a device for recycling the remaining ink, wherein the remaining ink is discharged from the elongated rollers. Means for removing along the length, a device for mechanically transporting the residual ink removed along the length from the roller to a recycling tank, and the length of the elongated roller for removing the residual ink removed. A device for passing through a mechanical transport device along the height. 2. The printing machine according to claim 1, wherein the roller extends between a pair of ends, and the mechanical transport device transports the removed residual ink to one of the ends. 3. The printing press according to claim 1, wherein the mechanical transport device is a mechanical conveyor. 4. The mechanical transfer device has a rotating member,
The printing machine according to claim 2. 5. The printing machine of claim 1, wherein the threading device has a containment housing with an elongated opening positioned to receive residual ink from the removal device along the length of the roller. 6. A printing machine having a row of ink rollers and a roller for carrying residual ink, a device for removing residual ink from the roller carrying residual ink, and carrying the removed residual ink from the roller for recycling. A printing machine characterized by a residual ink recycling device having a device including an elongated screw conveyor for leaving. 7. The printing machine according to claim 6, wherein the elongate screw conveyor comprises an elongate conveyor screw constituted by a plurality of elements helically arranged around a rotatably mounted shaft. 8. The screw conveyor has a receiving housing with elongated channels, and the elongated conveyor screw is contained within the receiving housing to move residual ink removed along the channels. The printing machine according to claim 7. 9. The printing press of claim 7, wherein the plurality of spiral array elements are flexible. 10. The printing press according to claim 7, wherein the plurality of spirally arranged elements are composed of a plurality of brush elements. 11. The printing machine according to claim 7, wherein the elongate screw conveyor comprises an elongate conveyor screw constituted by at least one elongate vane helically arranged around a rotatably mounted shaft. 12. The elongated vane has a flexible body,
The printing machine according to claim 11. 13. A printing machine having an ink roller row including rollers for carrying residual ink, a device for removing residual ink from the residual ink carrying roller, and for carrying away the removed ink from the roller for recycling. And a flexible member movable in the passage for moving residual ink along the passage in the elongated passage. A printing machine characterized by a device. 14. The flexible member is an elongated spiral brush rotatably mounted within the elongated passage.
The printing machine according to item 3. 15. The printing press according to claim 14, wherein the flexible member is an elongated spiral vane rotatably mounted. 16. The printing press according to claim 13, wherein the elongated passages have elongated steps that engage the flexible member to clean the flexible member. 17. The printing machine according to claim 13, wherein the flexible member is made of an ink resistant strip of polymeric plastic. 18. The printing machine according to claim 13, wherein the passage has an inner surface for accommodating residual ink removed and the flexible member resiliently engages the inner surface. 19. A printing press having an ink roller array including rollers for carrying residual ink, an elongated receiving housing, an elongated scraping device for removing residual ink from the rollers, and residual ink for receiving and receiving the residual ink. An elongated channel opening leading to a channel in a housing for transporting the ink, and an elongated scraper in the housing in position relative to the channel opening for receiving the residual ink removed by the scraper. A printing press, characterized by an ink recycling device having means for mounting. 20. A printing machine according to claim 19, comprising means for movably mounting the receiving housing to a roller carrying the remaining ink. 21. The printing machine according to claim 20, wherein the mounting means includes a pivot shaft and means for mounting the housing on the pivot shaft so as to be rotatable relative to each other. 22. The printing machine of claim 19 having a device in the channel for mechanically carrying the removed residual ink along the length of the channel. 23. The elongated scraper has a scraping edge located opposite the channel opening when in position to allow residual ink removed to fall through the opening and into the channel. Item 20. The printing machine according to Item 19. 24. A printing press assembly having an array of ink rollers including a residual ink carrying roller, comprising means for removing residual ink from the residual ink carrying roller, said means having been removed for recycling. A housing with an elongated channel opening leading to the elongated channel for receiving and carrying the ink away from the roller, and further for substantially closing the elongated channel and containing residual ink in the elongated channel during transfer. A printing machine characterized by a residual ink recycling device having means for mounting a receiving housing with the channel opening positioned adjacent to the residual ink carrying roller for enhancement. 25. There is a predetermined minimum gap between the roller and the channel opening, and the mounting means comprises means for movably mounting the receiving housing to the roller to adjust the clearance. The printing press according to claim 24. 26. The printing press according to claim 25, wherein the mounting means includes means that can be pivotally moved with respect to the roller to adjust the gap. 27. The printing press of claim 25, having a device within the channel for carrying the residual ink removed along the channel. 28. The delivery device has a rotatably mounted screw member extending into the elongated channel.
The printing machine according to item 5. 29. The removing means comprises a scraper, the scraper being movably mounted with respect to the roller together with the receiving housing for adjusting the position of the scraper with respect to the roller. The printing machine according to claim 25, 30. In a printing machine having an ink roller row including rollers for carrying remaining ink, a recycle tank, and a new ink tank, the ink received at the pump inlet connected to the new ink tank is transferred to the ink recycle tank. A fluid pump for pumping to a connected pump outlet, means for letting the residual ink removed from the rollers into the pump through the pump inlet, and fresh ink for mixing with the residual ink in the pump And a means for inserting the ink into the ink recycling tank, the pump pumping the mixture of the residual ink and the new ink from the pump outlet to the ink recycling tank. 31. A means for removing residual ink from a roller, the means comprising a channel, and having an elongated receiving housing for substantially closed transport of the removed ink along the channel. 31. The printing press according to claim 30, comprising means for directly connecting the inlet of the pump to the receiving housing for closed transfer from the receiving housing to the pump. 32. The printing machine according to claim 30, wherein the ink recycling tank is a closed pressure tank. 33. The printing press of claim 30 having means responsive to the amount of ink in the ink recycle tank for selectively passing fresh ink through the pump. 34. The remaining mixed ink from the ink recycling tank is returned to the remaining ink carrying roller.
The printing machine described in 0. 35. In a printing press having an ink roller train including rollers for carrying residual ink and a new ink tank, comprising means for removing residual ink from the rollers, the means comprising channels and being removed. An elongate housing for substantially closed delivery of the ink along the channel, and means for directly connecting an inlet of the pump for closed delivery from the housing to the pump to the housing. A printing machine having a remaining ink recycling device.