EP0175825A1 - Varnish coater for printed product - Google Patents
Varnish coater for printed product Download PDFInfo
- Publication number
- EP0175825A1 EP0175825A1 EP84306587A EP84306587A EP0175825A1 EP 0175825 A1 EP0175825 A1 EP 0175825A1 EP 84306587 A EP84306587 A EP 84306587A EP 84306587 A EP84306587 A EP 84306587A EP 0175825 A1 EP0175825 A1 EP 0175825A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- varnish
- pan
- overflow
- pipe
- drain port
- 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.)
- Granted
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F31/00—Inking arrangements or devices
- B41F31/02—Ducts, containers, supply or metering devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F23/00—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing
- B41F23/08—Print finishing devices, e.g. for glossing prints
Definitions
- the present invention relates to a varnish coater for a printed product, wherein the coater is arranged at the upstream side of a delivery unit of a rotary press or in an independent coating unit to apply varnish on a printed surface.
- the surface of paper printed by a rotary printing press is not quickly dried and can be contaminated in the subsequent processing.
- offsetting tends to be caused when printed sheets are attached.
- a dryer is arranged in a delivery path of the printed products, or a powder is sprayed on the printed paper surfaces.
- the dryer becomes large, and powder spraying results in surface roughening of the printed surface.
- Surface roughening tends to entail a loss of gloss and subsequent poor printing.
- varnish is applied to the printed surface to prevent the surface from being contaminated and to give it gloss. Varnishing is performed in printed products such as covers of books, catalogs and pamphlets which require an aesthetic effect.
- the varnish coater of this type is disposed between a printing unit and a delivery unit of a rotary press or in an independent coating unit. Furthermore, the varnish coater is used together with the dampening unit for the printing unit.
- the varnish coater generally has rollers in the same manner as that of a dampening apparatus for dampening a surface of a plate mounted on a plate cylinder of the printing unit. Varnish stored in a varnish pan is supplied to a surface of a blanket cylinder through the rollers. The varnish is transferred to a sheet passing between the blanket cylinder and an impression cylinder.
- the varnish pan in the varnish coater has a bucket-like shape and is connected to an external varnish tank through piping.
- the temperature and concentration of varnish are adjusted to be uniform by a heater and stirring unit which are arranged in the varnish tank.
- the adjusted varnish is circulated by a pump.
- the amount of varnish in the varnish pan must be kept constant.
- An overflow port is formed in the varnish pan to recover an excessive varnish portion to the varnish tank.
- the overflow port is formed at the upper portion of the varnish pan, and the pan roller is rotated.
- the upper layer of the varnish is stirred but the lower layer thereof will not be stirred. Therefore, the temperature of the lower layer of the varnish is decreased to increase the viscosity and concentration thereof.
- varnish having temperature and viscosity differences between the upper and lower layers is supplied to the varnishing portion, thus resulting in a nonuniform thickness of the varnish layer and hence degrading the product quality.
- the varnish pan is periodically stirred. However, varnishing efficiency is degraded, and a great effect cannot be expected.
- a varnish coater for a printed product wherein a varnish supply pipe from a varnish tank is open at a position above a bucket-like varnish pan for storing varnish, overflow means connected between, the varnish tank and a varnish drain pipe is open at a predetermined varnish level in the varnish pan, and varnish drain port means is formed in a bottom portion of the varnish pan so as to cause the varnish tank to communicate with the varnish drain pipe.
- Figs. 1 to 5 show a varnish coater according to an embodiment of the present invention, in which Fig. 1 is a side view showing the schematic configuration of a printing press to which the present invention is applied, Fig. 2 is a side view showing a. fourth color printing unit and a coating unit, Fig. 3 is a sectional view of a varnish pan, and Figs. 4 and 5 are respectively sectional views of a varnish pan, viewed from the same direction as in Fig. 1, according to other embodiments of the present invention.
- a printing press 1 comprises an automatic feeder 2, four color printing units 3, a coating unit 4, and a delivery unit 5. The respective units are separately manufactured and are assembled into an integral printing press.
- Each printing unit 3 comprises a plate cylinder 6 having a, plate thereon, an inking unit (not shown) for supplying ink to the surface of the plate, and a dampening unit 7 for supplying dampening water to the surface of the plate.
- a blanket cylinder 8 is brought into rolling contact with the plate cylinder 6 so as to transfer an image formed on the plate surface with ink and dampening. water.
- an impression cylinder 9 having a diameter twice that of the blanket cylinder 8 is brought into rolling contact therewith.
- a transfer cylinder 10 having the same diameter as the impression cylinder 9 is sandwiched between adjacent impression cylinders 9 of the corresponding printing units 3.
- An impression cylinder 11 having a diameter twice that of a blanket cylinder 22 (having the same construction as the blanket cylinder 8) of the coating unit 4 is disposed to be in rolling contact with the blanket cylinder 22 and at the same level as the impression cylinders 9 of the printing units 3.
- a transfer cylinder 12 is sandwiched between the impression cylinder 9 of the fourth color printing unit 3 and the impression cylinder 11 of the coating unit 4.
- Paper sheets 13 stacked on the feed table of the automatic feeder 2 are taken up by a sheet pick-up device (not shown) and are fed one by one onto a feedboard 14.
- Each sheet 13 is gripped with grippers of the first color impression cylinder 9 by means of a swing gripper unit.
- the sheet 13 is printed by the blanket cylinders 8 with four colors while the sheet 13 is sequentially fed by the transfer cylinders 10 and the corresponding impression cylinders 9. The printed sheet is then gripped by grippers of the impression cylinder 11 and is wound therearound.
- the delivery unit 5 comprises a delivery cylinder 15 which is brought into contact with the impression cylinder 11, and a pair of right and left sprockets 16 which are coaxially mounted on the delivery cylinder 15.
- Delivery chains 19 each having grippers at equal intervals are respectively looped between the right and left sprockets 16 and front end sprockets 18 of a delivery frame 17.
- the sheet 13 gripped by the grippers of the impression cylinder 11 is gripped by the grippers of the chains 19 and transferred thereby.
- the sheet 13 is released from the grippers of the chains onto a stack board 20.
- the coating unit 4 having the construction described above has a varnish coater 21.
- a varnish coating roller unit in the coating unit 21 has the blanket cylinder 22 with a blanket thereon and in rolling contact with the impression cylinder 11, a form roller 23 brought into rolling contact with the blanket cylinder 22, a metering roller 24 brought into rolling contact with the form roller 23, and a pan roller 25 brought into rolling contact with the metering roller 24.
- the blanket cylinder 22 is mounted through an eccentric bearing and can be detached from the form roller 23 and the impression cylinder 11.
- the pan roller 25 is mounted extending across right and left frames 28 while the pan roller 25 is dipped in varnish 27 in the varnish pan 26.
- the two ends of the metering roller 24 are supported by a pair of arms rotatably mounted at the corresponding bearing portions at the two ends of the pan roller 25.
- the metering roller 24 is brought into tight rolling contact with the form roller 23 at a predetermined contact pressure given by a spring member and an adjustable stopper.
- the metering roller 24 is also brought into tight rolling contact with the pan roller 25 at a predetermined contact pressure eccentrically adjusted at the bearing portions.
- a rider-roller 29 is supported by the arms to be brought into tight rolling contact with the form roller 23.
- the varnish 27 stored in the varnish pan 26 is drawn by the pan roller 25 which is rotated in the direction indicated by the arrow. A thickness of a layer of the varnish 27 is adjusted by the metering roller 24.
- the varnish 27 is then transferred to the form roller 23 and then the blanket cylinder 22 and is applied to the sheet 13 passing through the blanket cylinder 22 and the impression cylinder 11.
- the varnish pan 26 will be described in detail.
- the varnish pan 26 has a bucket-like shape and substantially the same length as that of the blanket cylinder 22.
- the varnish pan 26 is supported at the side of the frame 28.
- the bottom surface of the varnish pan 26 is inclined downward toward the center thereof.
- a varnish supply pipe 30 connected to the varnish tank (not shown) is opened above one end of the longitudinal direction.
- An overflow pipe 31 as an overflow means is fixed inside the varnish pan 26 at the end opposing the opening of the supply pipe 30.
- the upper opening end of the overflow pipe 30 is set at a level slightly lower than the top of the varnish pan 26 so as to overflow the varnish 27.
- a drain port 32 is formed in the bottom plate of the varnish pan 26 so as to correspond to the overflow pipe 31.
- a joint 34 is mounted at the drain port 32 to connect the varnish tank to a hose 33.
- Another drain port 35 is formed at the lowermost portion (central portion along the longitudinal direction of the varnish pan 26) of the bottom plate.
- a joint 36 coupled to the drain port 35 is connected to the joint 34 by a pipe 38 with an adjustrable cock 37.
- the varnish 27 stored in the varnish tank is delivered by a pump and is supplied to an end portion of the varnish pan 26 through the varnish supply pipe 30.
- the surface of the varni;h 27 supplied to the varnish pan 26 exceeds the level corresponding to the upper opening end of the overflow pipe 31, the excessive portion of the varnish 27 is discharged from the drain port 32 and returns to the varnish tank through the joint 34 and the hose 33.
- the cock 37 is opened, the varnish 27, even in the normal state, is partially discharged from the drain port 35 and returns to the varnish tank through the joint 36, the cock 37, the pipe 38, the joint 34 and the hose 33.
- the opening of the clock 37 is adjusted by checking the overflow state so as to prevent the varnish from being overflowed, so that the circulation of varnish can be performed through the train port 35.
- the varnish 27 is moved from one end to the varnish pan 26), where the varnish supply pipe 0 is opened, to the central portion thereof where the dain port 35 is opened, so that the lower layer of the varnish 27 in the vicinity of the bottom plate is stirred along with this varnish flow.
- the cock 37 is also used to allow cleaning of the varnish pan 26. After the varnish 27 is discharged from the varnish pan 26, a cleaning solution is supplied to the varnish pan 26. In this case, the cock 37 is fully opened, and every single droplet of the cleaning liquid can return to the cleaning solution tank.
- Fig. 4 is a sectional view of a varnish pan according to another embodiment of the present invention viewed from the same direction as in Fig. 3.
- a bottom plate of a varnish pan 26A is inclined from one end (corresponding to the opening of a varnish supply pipe 30) of the varnish pan 26A to the other end thereof.
- a drain port 32 is opened at the lowermost portion of the varnish pan 26A.
- a hose 33 is coupled to the drain port 32 through a joint 34.
- An overflow pipe 31A is coupled to the drain port 32.
- a plurality of small holes 39 which cause the varnish pan 26A to communicate with the interior of the overflow pipe 31A are formed at the lower portion of the overflow pipe 31A.
- the varnish 27 supplied from the varnish supply pipe 30 overflows from the overflow pipe 31A to the discharge port 32. At the same time, the varnish flows toward and through the small holes 39 and is discharged though the hose 33 via the overflow pipe 31A. Therefore, the lower layer of the varnish 27 is sufficiently stirred while it flows from one end to the other end of the varnish pan 26A.
- the overflow pipe 31A can be detachably mounted to discharge the varnish when the varnish pan 26A is cleaned.
- F ig. 5 is a sectional view of a varnish pan according to still another embodiment.
- This third embodiment is substantially the same as that of the first and second embodiments, except for a varnish pan and an overflow means.
- a small compartment 41 is formed by a partition plate 40 in a varnish pan 26B.
- a plurality of small holes 42 for causing the small compartment 41 to communicate with a remaining space in the varnish pan 26B are formed around the small compartment 51.
- the varnish 27 supplied from a varnish supply pipe 30 overflows and is discharged from the small compartment 41 through a drain port 32.
- the varnish 27 flows in the small holes 42 formed at the lower portion of the varnish pan 26B and is discharged from the hose 33. Therefore, the lower layer of the varnish 27 is sufficiently stirred while it flows from one end to the other end of the varnish pan 26B.
- a varnish drain port coupled to the varnish tank through the varnish drain pipe is formed at the bottom portion of a varnish pan having a varnish supply port and an overflow port. An excessive portion of varnish is discharged from the overflow port and the varnish drain port.
- the upper and lower layers of varnish in the varnish pan are sufficiently stirred to prevent nonuniform viscosity and concentration throughout the varnish pan.
- a uniform varnish film can be coated on the surface of the printed product, thereby greatly improving quality of the printed products.
- all the varnish can be automatically discharged from the varnish pan when varnish is stopped. Manual operation need not be substantially performed with respect to the varnish pan, thereby contributing to full automatic operation.
- the varnish supply port is formed at one end of the varnish pan and the varnish drain port is formed at the other end thereof, stirring can be further facilitated.
- a drain cock is provided, a ratio of an overflowed varnish amount to a total discharge varnish amount can be adjusted to maximize the effect of the present invention.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Inking, Control Or Cleaning Of Printing Machines (AREA)
- Non-Metallic Protective Coatings For Printed Circuits (AREA)
Abstract
Description
- The present invention relates to a varnish coater for a printed product, wherein the coater is arranged at the upstream side of a delivery unit of a rotary press or in an independent coating unit to apply varnish on a printed surface.
- The surface of paper printed by a rotary printing press is not quickly dried and can be contaminated in the subsequent processing. In a sheet-fed rotary printing press, offsetting tends to be caused when printed sheets are attached. In order to solve these problems, conventionally, a dryer is arranged in a delivery path of the printed products, or a powder is sprayed on the printed paper surfaces. However, in this case, the dryer becomes large, and powder spraying results in surface roughening of the printed surface. Surface roughening tends to entail a loss of gloss and subsequent poor printing. Instead of these techniques, varnish is applied to the printed surface to prevent the surface from being contaminated and to give it gloss. Varnishing is performed in printed products such as covers of books, catalogs and pamphlets which require an aesthetic effect.
- The varnish coater of this type is disposed between a printing unit and a delivery unit of a rotary press or in an independent coating unit. Furthermore, the varnish coater is used together with the dampening unit for the printing unit. The varnish coater generally has rollers in the same manner as that of a dampening apparatus for dampening a surface of a plate mounted on a plate cylinder of the printing unit. Varnish stored in a varnish pan is supplied to a surface of a blanket cylinder through the rollers. The varnish is transferred to a sheet passing between the blanket cylinder and an impression cylinder.
- The varnish pan in the varnish coater has a bucket-like shape and is connected to an external varnish tank through piping. The temperature and concentration of varnish are adjusted to be uniform by a heater and stirring unit which are arranged in the varnish tank. The adjusted varnish is circulated by a pump. In order to perform uniform varnishing, the amount of varnish in the varnish pan must be kept constant. An overflow port is formed in the varnish pan to recover an excessive varnish portion to the varnish tank.
- In the conventional varnish pan, the overflow port is formed at the upper portion of the varnish pan, and the pan roller is rotated. The upper layer of the varnish is stirred but the lower layer thereof will not be stirred. Therefore, the temperature of the lower layer of the varnish is decreased to increase the viscosity and concentration thereof. As a result, varnish having temperature and viscosity differences between the upper and lower layers is supplied to the varnishing portion, thus resulting in a nonuniform thickness of the varnish layer and hence degrading the product quality. In order to solve this problem, the varnish pan is periodically stirred. However, varnishing efficiency is degraded, and a great effect cannot be expected.
- It is an object of the present invention to provide a varnish coater for a printed product, wherein a lower layer of varnish in a varnish pan can be stirred to stably supply varnish having a uniform viscosity or the like.
- In order to achieve the above object of the present invention, there is provided a varnish coater for a printed product, wherein a varnish supply pipe from a varnish tank is open at a position above a bucket-like varnish pan for storing varnish, overflow means connected between, the varnish tank and a varnish drain pipe is open at a predetermined varnish level in the varnish pan, and varnish drain port means is formed in a bottom portion of the varnish pan so as to cause the varnish tank to communicate with the varnish drain pipe.
- Figs. 1 to 5 show a varnish coater according to an embodiment of the present invention, in which Fig. 1 is a side view showing the schematic configuration of a printing press to which the present invention is applied, Fig. 2 is a side view showing a. fourth color printing unit and a coating unit, Fig. 3 is a sectional view of a varnish pan, and Figs. 4 and 5 are respectively sectional views of a varnish pan, viewed from the same direction as in Fig. 1, according to other embodiments of the present invention.
- A preferred embodiment is exemplied when the present invention is applied to a four-color sheet-fed rotary printing press. Fig. 2 is a side view showing a fourth color printing unit and a coating unit, and Fig. 3 is a sectional view of a varnish pan. Referring to Figs. 1 to 3, a printing press 1 comprises an automatic feeder 2, four color printing units 3, a
coating unit 4, and a delivery unit 5. The respective units are separately manufactured and are assembled into an integral printing press. Each printing unit 3 comprises aplate cylinder 6 having a, plate thereon, an inking unit (not shown) for supplying ink to the surface of the plate, and adampening unit 7 for supplying dampening water to the surface of the plate. Ablanket cylinder 8 is brought into rolling contact with theplate cylinder 6 so as to transfer an image formed on the plate surface with ink and dampening. water. In each printing unit 3, animpression cylinder 9 having a diameter twice that of theblanket cylinder 8 is brought into rolling contact therewith. Atransfer cylinder 10 having the same diameter as theimpression cylinder 9 is sandwiched betweenadjacent impression cylinders 9 of the corresponding printing units 3. Animpression cylinder 11 having a diameter twice that of a blanket cylinder 22 (having the same construction as the blanket cylinder 8) of thecoating unit 4 is disposed to be in rolling contact with theblanket cylinder 22 and at the same level as theimpression cylinders 9 of the printing units 3. Atransfer cylinder 12 is sandwiched between theimpression cylinder 9 of the fourth color printing unit 3 and theimpression cylinder 11 of thecoating unit 4.Paper sheets 13 stacked on the feed table of the automatic feeder 2 are taken up by a sheet pick-up device (not shown) and are fed one by one onto afeedboard 14. Eachsheet 13 is gripped with grippers of the firstcolor impression cylinder 9 by means of a swing gripper unit. Thesheet 13 is printed by theblanket cylinders 8 with four colors while thesheet 13 is sequentially fed by thetransfer cylinders 10 and thecorresponding impression cylinders 9. The printed sheet is then gripped by grippers of theimpression cylinder 11 and is wound therearound. - The delivery unit 5 comprises a
delivery cylinder 15 which is brought into contact with theimpression cylinder 11, and a pair of right andleft sprockets 16 which are coaxially mounted on thedelivery cylinder 15.Delivery chains 19 each having grippers at equal intervals are respectively looped between the right andleft sprockets 16 andfront end sprockets 18 of a delivery frame 17. Thesheet 13 gripped by the grippers of theimpression cylinder 11 is gripped by the grippers of thechains 19 and transferred thereby. Thesheet 13 is released from the grippers of the chains onto astack board 20. - The
coating unit 4 having the construction described above has avarnish coater 21. A varnish coating roller unit in thecoating unit 21 has theblanket cylinder 22 with a blanket thereon and in rolling contact with theimpression cylinder 11, aform roller 23 brought into rolling contact with theblanket cylinder 22, a metering roller 24 brought into rolling contact with theform roller 23, and apan roller 25 brought into rolling contact with the metering roller 24. Theblanket cylinder 22 is mounted through an eccentric bearing and can be detached from theform roller 23 and theimpression cylinder 11. Thepan roller 25 is mounted extending across right andleft frames 28 while thepan roller 25 is dipped invarnish 27 in thevarnish pan 26. The two ends of the metering roller 24 are supported by a pair of arms rotatably mounted at the corresponding bearing portions at the two ends of thepan roller 25. The metering roller 24 is brought into tight rolling contact with theform roller 23 at a predetermined contact pressure given by a spring member and an adjustable stopper. The metering roller 24 is also brought into tight rolling contact with thepan roller 25 at a predetermined contact pressure eccentrically adjusted at the bearing portions. A rider-roller 29 is supported by the arms to be brought into tight rolling contact with theform roller 23. Thevarnish 27 stored in thevarnish pan 26 is drawn by thepan roller 25 which is rotated in the direction indicated by the arrow. A thickness of a layer of thevarnish 27 is adjusted by the metering roller 24. Thevarnish 27 is then transferred to theform roller 23 and then theblanket cylinder 22 and is applied to thesheet 13 passing through theblanket cylinder 22 and theimpression cylinder 11. - The
varnish pan 26 will be described in detail. Thevarnish pan 26 has a bucket-like shape and substantially the same length as that of theblanket cylinder 22. Thevarnish pan 26 is supported at the side of theframe 28. The bottom surface of thevarnish pan 26 is inclined downward toward the center thereof. Avarnish supply pipe 30 connected to the varnish tank (not shown) is opened above one end of the longitudinal direction. When a pump arranged in the vicinity of the varnish tank is operated, thevarnish 27 is supplied to thevarnish pan 26. Anoverflow pipe 31 as an overflow means is fixed inside thevarnish pan 26 at the end opposing the opening of thesupply pipe 30. The upper opening end of theoverflow pipe 30 is set at a level slightly lower than the top of thevarnish pan 26 so as to overflow thevarnish 27. Adrain port 32 is formed in the bottom plate of thevarnish pan 26 so as to correspond to theoverflow pipe 31. A joint 34 is mounted at thedrain port 32 to connect the varnish tank to ahose 33. Anotherdrain port 35 is formed at the lowermost portion (central portion along the longitudinal direction of the varnish pan 26) of the bottom plate. A joint 36 coupled to thedrain port 35 is connected to the joint 34 by apipe 38 with anadjustrable cock 37. - In the varnish coater having the construction described above, the
varnish 27 stored in the varnish tank is delivered by a pump and is supplied to an end portion of thevarnish pan 26 through thevarnish supply pipe 30. When the surface of the varni;h 27 supplied to thevarnish pan 26 exceeds the level corresponding to the upper opening end of theoverflow pipe 31, the excessive portion of thevarnish 27 is discharged from thedrain port 32 and returns to the varnish tank through the joint 34 and thehose 33. When thecock 37 is opened, thevarnish 27, even in the normal state, is partially discharged from thedrain port 35 and returns to the varnish tank through the joint 36, thecock 37, thepipe 38, the joint 34 and thehose 33. The opening of theclock 37 is adjusted by checking the overflow state so as to prevent the varnish from being overflowed, so that the circulation of varnish can be performed through thetrain port 35. Thevarnish 27 is moved from one end to the varnish pan 26), where the varnish supply pipe 0 is opened, to the central portion thereof where thedain port 35 is opened, so that the lower layer of thevarnish 27 in the vicinity of the bottom plate is stirred along with this varnish flow. Thecock 37 is also used to allow cleaning of thevarnish pan 26. After thevarnish 27 is discharged from thevarnish pan 26, a cleaning solution is supplied to thevarnish pan 26. In this case, thecock 37 is fully opened, and every single droplet of the cleaning liquid can return to the cleaning solution tank. - Fig. 4 is a sectional view of a varnish pan according to another embodiment of the present invention viewed from the same direction as in Fig. 3. According to this embodiment, a bottom plate of a
varnish pan 26A is inclined from one end (corresponding to the opening of a varnish supply pipe 30) of thevarnish pan 26A to the other end thereof. Adrain port 32 is opened at the lowermost portion of thevarnish pan 26A. Ahose 33 is coupled to thedrain port 32 through a joint 34. Anoverflow pipe 31A is coupled to thedrain port 32. A plurality ofsmall holes 39 which cause thevarnish pan 26A to communicate with the interior of theoverflow pipe 31A are formed at the lower portion of theoverflow pipe 31A. Thevarnish 27 supplied from thevarnish supply pipe 30 overflows from theoverflow pipe 31A to thedischarge port 32. At the same time, the varnish flows toward and through thesmall holes 39 and is discharged though thehose 33 via theoverflow pipe 31A. Therefore, the lower layer of thevarnish 27 is sufficiently stirred while it flows from one end to the other end of thevarnish pan 26A. Theoverflow pipe 31A can be detachably mounted to discharge the varnish when thevarnish pan 26A is cleaned. - Fig. 5 is a sectional view of a varnish pan according to still another embodiment. This third embodiment is substantially the same as that of the first and second embodiments, except for a varnish pan and an overflow means. A small compartment 41 is formed by a
partition plate 40 in avarnish pan 26B. A plurality ofsmall holes 42 for causing the small compartment 41 to communicate with a remaining space in thevarnish pan 26B are formed around the small compartment 51. Thevarnish 27 supplied from avarnish supply pipe 30 overflows and is discharged from the small compartment 41 through adrain port 32. At the same time, thevarnish 27 flows in thesmall holes 42 formed at the lower portion of thevarnish pan 26B and is discharged from thehose 33. Therefore, the lower layer of thevarnish 27 is sufficiently stirred while it flows from one end to the other end of thevarnish pan 26B. - As has been apparent from the above description, in the varnish coater for a printed product according to the present invention, a varnish drain port coupled to the varnish tank through the varnish drain pipe is formed at the bottom portion of a varnish pan having a varnish supply port and an overflow port. An excessive portion of varnish is discharged from the overflow port and the varnish drain port. The upper and lower layers of varnish in the varnish pan are sufficiently stirred to prevent nonuniform viscosity and concentration throughout the varnish pan. A uniform varnish film can be coated on the surface of the printed product, thereby greatly improving quality of the printed products. In addition, when varnishing is completed, all the varnish can be automatically discharged from the varnish pan when varnish is stopped. Manual operation need not be substantially performed with respect to the varnish pan, thereby contributing to full automatic operation. The recovery of varnish, cleaning of the varnish pan by supplying a solvent, and discharge of the solvent-can be automatically performed to provide a great operational advantage. When the varnish supply port is formed at one end of the varnish pan and the varnish drain port is formed at the other end thereof, stirring can be further facilitated. When a drain cock is provided, a ratio of an overflowed varnish amount to a total discharge varnish amount can be adjusted to maximize the effect of the present invention.
Claims (7)
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE8484306587T DE3476354D1 (en) | 1984-09-27 | 1984-09-27 | Varnish coater for printed product |
AT84306587T ATE40318T1 (en) | 1984-09-27 | 1984-09-27 | VARNISH DEVICE FOR PRINTED PRODUCTS. |
EP84306587A EP0175825B1 (en) | 1984-09-27 | 1984-09-27 | Varnish coater for printed product |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP84306587A EP0175825B1 (en) | 1984-09-27 | 1984-09-27 | Varnish coater for printed product |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0175825A1 true EP0175825A1 (en) | 1986-04-02 |
EP0175825B1 EP0175825B1 (en) | 1989-01-25 |
Family
ID=8192771
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP84306587A Expired EP0175825B1 (en) | 1984-09-27 | 1984-09-27 | Varnish coater for printed product |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0175825B1 (en) |
AT (1) | ATE40318T1 (en) |
DE (1) | DE3476354D1 (en) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB565686A (en) * | 1942-05-21 | 1944-11-22 | Goss Printing Press Co Ltd | Inking mechanism for rotary printing presses |
US3605782A (en) * | 1969-07-14 | 1971-09-20 | Graymills Corp | Liquid mixing device |
US4369734A (en) * | 1980-03-17 | 1983-01-25 | M.A.N.-Roland Druckmaschinen Aktiengesellschaft | Varnishing assembly in a printing press having self-cleaning feature |
-
1984
- 1984-09-27 EP EP84306587A patent/EP0175825B1/en not_active Expired
- 1984-09-27 DE DE8484306587T patent/DE3476354D1/en not_active Expired
- 1984-09-27 AT AT84306587T patent/ATE40318T1/en not_active IP Right Cessation
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB565686A (en) * | 1942-05-21 | 1944-11-22 | Goss Printing Press Co Ltd | Inking mechanism for rotary printing presses |
US3605782A (en) * | 1969-07-14 | 1971-09-20 | Graymills Corp | Liquid mixing device |
US4369734A (en) * | 1980-03-17 | 1983-01-25 | M.A.N.-Roland Druckmaschinen Aktiengesellschaft | Varnishing assembly in a printing press having self-cleaning feature |
Also Published As
Publication number | Publication date |
---|---|
EP0175825B1 (en) | 1989-01-25 |
ATE40318T1 (en) | 1989-02-15 |
DE3476354D1 (en) | 1989-03-02 |
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