CA2096170C - Method and apparatus for erasing the ink-carrying layer from the surface of an image-containing printing form - Google Patents
Method and apparatus for erasing the ink-carrying layer from the surface of an image-containing printing formInfo
- Publication number
- CA2096170C CA2096170C CA002096170A CA2096170A CA2096170C CA 2096170 C CA2096170 C CA 2096170C CA 002096170 A CA002096170 A CA 002096170A CA 2096170 A CA2096170 A CA 2096170A CA 2096170 C CA2096170 C CA 2096170C
- Authority
- CA
- Canada
- Prior art keywords
- printing form
- printing
- erasing device
- jet
- image
- 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.)
- Expired - Fee Related
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
- B41N3/00—Preparing for use and conserving printing surfaces
- B41N3/006—Cleaning, washing, rinsing or reclaiming of printing formes other than intaglio formes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
- B41C1/00—Forme preparation
- B41C1/10—Forme preparation for lithographic printing; Master sheets for transferring a lithographic image to the forme
- B41C1/1091—Forme preparation for lithographic printing; Master sheets for transferring a lithographic image to the forme by physical transfer from a donor sheet having an uniform coating of lithographic material using thermal means as provided by a thermal head or a laser; by mechanical pressure, e.g. from a typewriter by electrical recording ribbon therefor
Abstract
A method and an apparatus for repeatedly erasing the ink-carrying layer of a printing form which is covered by an image and is suitable for offset printing. An erasing device directs a jet of pressurized medium at an angle of less than 90° against the surface of the printing form on which the image is applied. A relative movement is carried out between the printing form and the erasing device, so that the image elements of the ink-carrying layer are removed over the entire surface of the printing form. The pressurized medium is preferably water.
Description
BA(~KGR(lUND OF T~F. INVE~TION
1. Field of thP TnyP~ n ~ ~1 9 ~17 D
The present invention relates to a method and an apparatus for repeatedly erasing an ink-carrying layer from the surface of an image-containing printing form which is usable for offset printing.
N:\.lWC7.rAT
1. Field of thP TnyP~ n ~ ~1 9 ~17 D
The present invention relates to a method and an apparatus for repeatedly erasing an ink-carrying layer from the surface of an image-containing printing form which is usable for offset printing.
N:\.lWC7.rAT
2. ~escription of the Related l~rt 2 0 9 ~17 As proposed, for example, in German Patent 39 17 844 owned by the instant assignee, a direct image ~rplir~t~ in tllis case by means of a thermo-transfer method, is w~ iondlly carried out by applying on a hydrophilic aluminum plate organic substances which influence in accordance with the image the manner in which the ink is carried. The substances are applied on portions of the surface of t~le printing form by means of an image point transfer unit in a~uld~.~e with a digital image infi~rm:ltinn For this purpose, a thermo-transfer foil is used which has on its side facing the prillting form a thermo-sensitive coating. By applying energy, the oleophilic image elements are dissolved or removed from the coating, transferred to the printing form and are anchored as an ink-carrying layer on the surface of the printing forrn.
However, the ink-carrying layer can also be anchored on the surface of the printing form as an image by means of the inkjet process or by means of an el~l~,,LLic process utilizing a toner.
In addition to the hydrophilic aluminum plate, it is also possible to use as the printing form a printing cylinder with a c~ linder jacket of ceramic material, or a solid ceramic or glass cylinder can be used.
As is readily apparent in t~le use of printing cylinders, it should be possible to repeatedly use the printing forms to which the image is applied directly. For this purpose, the printing forms to which the image has b~en applied in the above-described manner must be 1, i.e., the material forming the printed areas must be removed or erased and it may N~ AT --2--- 2~9~17~
~tditionally be necessary to subject the sul~face of the printing form to a treatment to render it hydrophilic.
Previously used methods of erasing the subject on the printing form, such as softening, vaporizing, ~ , burning of the image elements, frequently have the .I;~d.. _ that the method is carried ollt in several stages which means that the method is and the surface of the printing form is subjected to a high mechanical or abrasive load.
In addition, erasing of the sllrface of the printing form is usuaUy carried out after the printing process. Thus, initially the in~ing device and the damping device are turned offand the remaining residues of the printing ink on the forme cylinder are removed by means of cleaning devices which are ~u..v~ iull~lly used in machines of this type.
German application P 41 23 959.8 discloses a method of l~r. ~ , printing forms to which an image is applied directl y and which are suitable for offset printing, in which the image on the surface of printing forms is erased and the surface is rendered L,,Jl~ r without damaging or attacking the surface and which is ~ Iy simple.
The method described in t~le German application makes it possible to reactively erase organic substance particles or ~ on the surface of the printing form which had bcen applied thereon by means of inkjel methods, elc.,llu~l~lic methods as well as thermo-transfer methods.
N:\:l~ rAT 3 SUMMARY OF THE INVENTION 2 ~ 9 ~17 Q
Therefore, it is a primary olbject of the present invention to develop a method of erasing the ink carTying layer (layers, ink!;, toners) for a printing form on which an image has been applied in the above-described manner, wherein it is possible to repeateily apply an image on the water-carrying layer of the printinig form, wherein the method is ~v...~Li~,ly even simpler than known methods, and wher~in the method can be carried out with a simple apparatus.
In accordance with the pr,~sent invention, an erasing device directs a jet of ;~ medium against the surface of the printing form. The erasing device includes at least one nozzle which guides the jet in ~iuch a way that it impinges obliquely at an angle ~r which is smaller than 90 on the surface of the printing form. The printing form and the erasing device are movable relative to each other.
Since the invention makes it possible to release or separate the oleophilic image elements from the surface of the printing form by means of a jet of ~ i medium, substantiali quantities of acids or solvents ~an be saved, thereby ~v ~ 'y ~ ' ~ to the protection of the Cl~vil~
The r~ q~ ql or abrasive load acting on the printing form is relatively small.
Tests have shown that a printing form erased in this manner can be reused at least 10 to 20 times. A rcmoval of image elements from the printing form by means of a steam jet is also possible, however, requires a longer application period. r~.lLll.,~lllvlc, tests have shown that, for example, an aluminum plate erased i~ this manner can be reused " '~,. In other words, a treatment to render the plate ll~dlvlJllilic is not necessary. Another advantage of the N:~ICDP.PAT
2~9~ ~0 present invention is the fact that the erasing device can be used within the printing machine as well as outside of the printing machine.
The various features of novl~lty which .1"~ ;,. the invention are pointed out with ~ y in the claums annexed to and forming a part of the disclosure. For a better ''''~I' ' `I - ~'Il''L of the invention, its operating advantages, and specific objects attained by its use, reference should be had to the drawing antl descriptive matter in which there are illustrated and described preferred ~ " of the ir~vention.
N:~:lC~.~Ar -5--B~IFF DF^s(~RTT'TlON OF I~F DRAWINGS
In the drawings: 2 ~ ~ ~17 0 Fig. I is a schematic view showing the erasing device for erasing a printing form outside of the printing machine; and Fig. 2 is a schematic view showing the erasing device for erasing a printing form within the printing machine.
N:~lC~7,rA~ 6--DF-~CRIPTION OF I~F PREFERRED FMRODIMENTS 2 0 9 ~17 Fig. I of the drawing shows a printing form I which is plane and, therefore, is located outside of a printing machine. Refi~rence numeral 2 denotes an erasing device which guides a water jet 3. Very small image elealents 4 which correspond in their size to an image point have been separated from the coating ~f a thermo-transfer foil and placed on the printing form l. The image elements 4 have solidified on the surface of the printing form I and, because of the oleophilic proper~ thereof, form on the surface of the printing form I the ink-carrying layer on the water-carrying layer 5 of the printing form 1. In order to be able to show the image elements 4, they are illustrated in the drawing on a substantially enlarged scale.
The erasing device 2 essenti~ally includes a nozzle 6 which is -: ' ' to the output of a cu. 11y available high-plessure cleaning unit, as it is known, for example, from motor vehicle washing plants. The n,~zzle 6 points at an angle toward the surface of the printing form 1, so that the water jet 3 impinges on the surface of the printing form I at an angle ~ which is smaller than 90. The nozzle 6 can be guided either manually or "y line-by-line and in the direction of arrow a over the printing form I, so that the water jet 3 can separate or release the image elements 4 from the water-carrying layer 5 of the printing form 1. An a'lready erased portion 7 is shown behind the erasing device 2 as seen in the direction of movement designated by atrow a.
A second example of the use of the invention is illustrated in Fig. 2. A printing form 8 is mounted on a plate cylinder 9. Accordingly, the method of repeatedly erasing the ink-catrying layer, l~ r ~.ed by the image elements 10, is catried out within the printing machine.
N u~ r~T 7 =
209617~
As illustrated in Fig. 2, an erasing device 11 is fixedly mounted in the printing machine over a portion of the surface of tlle printing form 8 and extends over the width of the printing form 8. The erasing device 11 ir~cludes a plurality of nozzles 12 which are arranged in a line extending over the width of the ~rinting form 8. As in the case of the first example described above, the nozzles are connected to the output of a commercially available high-pressure cleaning unit. The noz~les 12 direct several jets 13 of a ~ ' medium, preferably water, against the surface of the printing form 8 inclined at an angle which is smaller than 90. During the application of the jets 13, the printing form 8 is rotated and moved underneath the erasing device 11.
The c ~ ' and number of noz~les 12 is selected in such a way that the entire surface of the printing form 8 can be erased. The nozzles 12 of the erasing device 11 are mounted in a cover 14 in order to protect the ~ u ' ,, area. The cover 14 is c~pen toward the printing form 8 and defines a work space 15. Another opening 16 of the cover 14 serves to discharge the water introduced into the work space 15 and the coating separated by the jets.
The opening 16 can usually be connected through a flange 17 to a pump, not shown.
In accordance with an a.l~ ~ feature, the cover 14 is provided with suitable sealing elements 18 to be placed on the printing form 8. The work space lS is ~d~
sealed relative to the printing form 8 in tlle manner known from sealing techmology of rotary for example, in the form c~f sliding packings or by means of the use of ferro-fluids. During the offset printing procedure, the erasing device including the se~ling elements thereof are raised from the printing forrrl. The erasing device carl be arranged at all freely N:UIOD7.~AT -8-.
~ 2~961~0accessible locations at the ~ u~ ~ of the printing form cylinder. Thus, an overhead is also possible.
The medium applied by the jets, preferably water, is maintained in ~he erasing device 2 or 11 at least at a pressure that is greater than 5 bar. Tests have shown that a quick and complete separation of the ink-car~ying layer is achieved preferably at a pressure of 100 bar and a water i . ~ of about 90CC. If the pressure is lower, it is ~1~. .~u, to heat the printing form I or 8. In the printing machine, the heating can be carried out in known manner by means of one or more radiation sourcl~s which are mounted in the interior of the plate cylinder 9 and which are directed toward the inner wall surface of the printing form 8. The radiation sources are capable of raising the i . on the surface of the printing form 8 almost to the melting point of the substance forrning the image elements. In this case, the plate cylinder preferably is made of glass or glass ceramic.
Of course, a, ~ of the jet of ~ U~ d medium directed against the printing form is possible by adding to the water abrasive additives, such as, sand or similar substances, or chemical additives which have wax-dissolving properties, so that the removal efficiency of the jets is increased.
The erasing device 2, 11, whe~her mounted outside or inside the printing machine, can be raised from the printing form surface to such an extent that there is always sufficient space, for example, for a CPT imaging unit in the printing machine.
In addition, the method accor~ding to the present invention and the apparatus for carrying out the method can also be used for erasing a gravure cylinder filled by a thermo-N:U~0~17~AT 9 r 209~170 nsfer process, i.e., the surface of the cylinder which is completely provided with cupletswhich are filled with an organic substance in the areas which do not contain the image.
It should be understood that the preferred ~ b~ and examples described are for illustrative purposes only and are nct to be construed as limiting the scope of the present invention which is properly delineated onl~l in the appended claims.
u~ Ar -10-
However, the ink-carrying layer can also be anchored on the surface of the printing form as an image by means of the inkjet process or by means of an el~l~,,LLic process utilizing a toner.
In addition to the hydrophilic aluminum plate, it is also possible to use as the printing form a printing cylinder with a c~ linder jacket of ceramic material, or a solid ceramic or glass cylinder can be used.
As is readily apparent in t~le use of printing cylinders, it should be possible to repeatedly use the printing forms to which the image is applied directly. For this purpose, the printing forms to which the image has b~en applied in the above-described manner must be 1, i.e., the material forming the printed areas must be removed or erased and it may N~ AT --2--- 2~9~17~
~tditionally be necessary to subject the sul~face of the printing form to a treatment to render it hydrophilic.
Previously used methods of erasing the subject on the printing form, such as softening, vaporizing, ~ , burning of the image elements, frequently have the .I;~d.. _ that the method is carried ollt in several stages which means that the method is and the surface of the printing form is subjected to a high mechanical or abrasive load.
In addition, erasing of the sllrface of the printing form is usuaUy carried out after the printing process. Thus, initially the in~ing device and the damping device are turned offand the remaining residues of the printing ink on the forme cylinder are removed by means of cleaning devices which are ~u..v~ iull~lly used in machines of this type.
German application P 41 23 959.8 discloses a method of l~r. ~ , printing forms to which an image is applied directl y and which are suitable for offset printing, in which the image on the surface of printing forms is erased and the surface is rendered L,,Jl~ r without damaging or attacking the surface and which is ~ Iy simple.
The method described in t~le German application makes it possible to reactively erase organic substance particles or ~ on the surface of the printing form which had bcen applied thereon by means of inkjel methods, elc.,llu~l~lic methods as well as thermo-transfer methods.
N:\:l~ rAT 3 SUMMARY OF THE INVENTION 2 ~ 9 ~17 Q
Therefore, it is a primary olbject of the present invention to develop a method of erasing the ink carTying layer (layers, ink!;, toners) for a printing form on which an image has been applied in the above-described manner, wherein it is possible to repeateily apply an image on the water-carrying layer of the printinig form, wherein the method is ~v...~Li~,ly even simpler than known methods, and wher~in the method can be carried out with a simple apparatus.
In accordance with the pr,~sent invention, an erasing device directs a jet of ;~ medium against the surface of the printing form. The erasing device includes at least one nozzle which guides the jet in ~iuch a way that it impinges obliquely at an angle ~r which is smaller than 90 on the surface of the printing form. The printing form and the erasing device are movable relative to each other.
Since the invention makes it possible to release or separate the oleophilic image elements from the surface of the printing form by means of a jet of ~ i medium, substantiali quantities of acids or solvents ~an be saved, thereby ~v ~ 'y ~ ' ~ to the protection of the Cl~vil~
The r~ q~ ql or abrasive load acting on the printing form is relatively small.
Tests have shown that a printing form erased in this manner can be reused at least 10 to 20 times. A rcmoval of image elements from the printing form by means of a steam jet is also possible, however, requires a longer application period. r~.lLll.,~lllvlc, tests have shown that, for example, an aluminum plate erased i~ this manner can be reused " '~,. In other words, a treatment to render the plate ll~dlvlJllilic is not necessary. Another advantage of the N:~ICDP.PAT
2~9~ ~0 present invention is the fact that the erasing device can be used within the printing machine as well as outside of the printing machine.
The various features of novl~lty which .1"~ ;,. the invention are pointed out with ~ y in the claums annexed to and forming a part of the disclosure. For a better ''''~I' ' `I - ~'Il''L of the invention, its operating advantages, and specific objects attained by its use, reference should be had to the drawing antl descriptive matter in which there are illustrated and described preferred ~ " of the ir~vention.
N:~:lC~.~Ar -5--B~IFF DF^s(~RTT'TlON OF I~F DRAWINGS
In the drawings: 2 ~ ~ ~17 0 Fig. I is a schematic view showing the erasing device for erasing a printing form outside of the printing machine; and Fig. 2 is a schematic view showing the erasing device for erasing a printing form within the printing machine.
N:~lC~7,rA~ 6--DF-~CRIPTION OF I~F PREFERRED FMRODIMENTS 2 0 9 ~17 Fig. I of the drawing shows a printing form I which is plane and, therefore, is located outside of a printing machine. Refi~rence numeral 2 denotes an erasing device which guides a water jet 3. Very small image elealents 4 which correspond in their size to an image point have been separated from the coating ~f a thermo-transfer foil and placed on the printing form l. The image elements 4 have solidified on the surface of the printing form I and, because of the oleophilic proper~ thereof, form on the surface of the printing form I the ink-carrying layer on the water-carrying layer 5 of the printing form 1. In order to be able to show the image elements 4, they are illustrated in the drawing on a substantially enlarged scale.
The erasing device 2 essenti~ally includes a nozzle 6 which is -: ' ' to the output of a cu. 11y available high-plessure cleaning unit, as it is known, for example, from motor vehicle washing plants. The n,~zzle 6 points at an angle toward the surface of the printing form 1, so that the water jet 3 impinges on the surface of the printing form I at an angle ~ which is smaller than 90. The nozzle 6 can be guided either manually or "y line-by-line and in the direction of arrow a over the printing form I, so that the water jet 3 can separate or release the image elements 4 from the water-carrying layer 5 of the printing form 1. An a'lready erased portion 7 is shown behind the erasing device 2 as seen in the direction of movement designated by atrow a.
A second example of the use of the invention is illustrated in Fig. 2. A printing form 8 is mounted on a plate cylinder 9. Accordingly, the method of repeatedly erasing the ink-catrying layer, l~ r ~.ed by the image elements 10, is catried out within the printing machine.
N u~ r~T 7 =
209617~
As illustrated in Fig. 2, an erasing device 11 is fixedly mounted in the printing machine over a portion of the surface of tlle printing form 8 and extends over the width of the printing form 8. The erasing device 11 ir~cludes a plurality of nozzles 12 which are arranged in a line extending over the width of the ~rinting form 8. As in the case of the first example described above, the nozzles are connected to the output of a commercially available high-pressure cleaning unit. The noz~les 12 direct several jets 13 of a ~ ' medium, preferably water, against the surface of the printing form 8 inclined at an angle which is smaller than 90. During the application of the jets 13, the printing form 8 is rotated and moved underneath the erasing device 11.
The c ~ ' and number of noz~les 12 is selected in such a way that the entire surface of the printing form 8 can be erased. The nozzles 12 of the erasing device 11 are mounted in a cover 14 in order to protect the ~ u ' ,, area. The cover 14 is c~pen toward the printing form 8 and defines a work space 15. Another opening 16 of the cover 14 serves to discharge the water introduced into the work space 15 and the coating separated by the jets.
The opening 16 can usually be connected through a flange 17 to a pump, not shown.
In accordance with an a.l~ ~ feature, the cover 14 is provided with suitable sealing elements 18 to be placed on the printing form 8. The work space lS is ~d~
sealed relative to the printing form 8 in tlle manner known from sealing techmology of rotary for example, in the form c~f sliding packings or by means of the use of ferro-fluids. During the offset printing procedure, the erasing device including the se~ling elements thereof are raised from the printing forrrl. The erasing device carl be arranged at all freely N:UIOD7.~AT -8-.
~ 2~961~0accessible locations at the ~ u~ ~ of the printing form cylinder. Thus, an overhead is also possible.
The medium applied by the jets, preferably water, is maintained in ~he erasing device 2 or 11 at least at a pressure that is greater than 5 bar. Tests have shown that a quick and complete separation of the ink-car~ying layer is achieved preferably at a pressure of 100 bar and a water i . ~ of about 90CC. If the pressure is lower, it is ~1~. .~u, to heat the printing form I or 8. In the printing machine, the heating can be carried out in known manner by means of one or more radiation sourcl~s which are mounted in the interior of the plate cylinder 9 and which are directed toward the inner wall surface of the printing form 8. The radiation sources are capable of raising the i . on the surface of the printing form 8 almost to the melting point of the substance forrning the image elements. In this case, the plate cylinder preferably is made of glass or glass ceramic.
Of course, a, ~ of the jet of ~ U~ d medium directed against the printing form is possible by adding to the water abrasive additives, such as, sand or similar substances, or chemical additives which have wax-dissolving properties, so that the removal efficiency of the jets is increased.
The erasing device 2, 11, whe~her mounted outside or inside the printing machine, can be raised from the printing form surface to such an extent that there is always sufficient space, for example, for a CPT imaging unit in the printing machine.
In addition, the method accor~ding to the present invention and the apparatus for carrying out the method can also be used for erasing a gravure cylinder filled by a thermo-N:U~0~17~AT 9 r 209~170 nsfer process, i.e., the surface of the cylinder which is completely provided with cupletswhich are filled with an organic substance in the areas which do not contain the image.
It should be understood that the preferred ~ b~ and examples described are for illustrative purposes only and are nct to be construed as limiting the scope of the present invention which is properly delineated onl~l in the appended claims.
u~ Ar -10-
Claims (11)
1. A method of repeatedly erasing an ink-carrying layer from a surface of a printing form to which an image is applied and which is suitable for offset printing, the image having image elements, the method comprising directing by means of an erasing device a jet of a pressurized medium against the surface of the printing form inclined at an angle of less than 90° relative to the surface of the printing form, and carrying out a relative movement between the printing form and the erasing device, so that the image elements are removed from the entire surface of the printing form.
2. The method according to claim 1, wherein the ink-carrying layer has been applied by means of a thermo-transfer procedure, the method further comprising applying heat to the surface of the printing form.
3. The method according to claim 1, comprising using water as the pressurized medium.
4. The method according to claim 1, comprising maintaining the jet of pressurized medium at a pressure of greater than 5 bar.
5. The method according to claim 3, comprising maintaining the pressurized water jet at a pressure of about 100 bar and maintaining the water at a temperature of approximately 90°C.
6. The method according to claim 2, wherein the image elements are formed by a substance having a melting point, the method further comprising heating the printing form such that the temperature on the surface of the printing form almost reaches the melting point of the substance forming the image elements.
7. The method according to claim 1, comprising guiding the erasing device directing the jet of pressurized medium against the surface of the printing form line-by-line transversely and longitudinally over the entire surface of the printing form.
8. The method according to claim 1, wherein the printing form has a width and the erasing device extends over the entire width of the printing form, the method further comprising guiding the jet of pressurized medium over the width of the printing form and simultaneously moving the printing form in a rotating motion underneath the erasing device.
9. An apparatus for repeatedly erasing an ink-carrying layer from a surface of a printing form to which an image is applied and which is suitable for offset printing, the apparatus comprising an erasing device for directing a jet of pressurized medium against the surface of the printing form, the erasing device comprising at least one nozzle for guiding the jet toward the surface of the printing form inclined at an angle smaller than 90° relative to the surface of the printing form, and means for carrying out a relative motion between the printing form and the erasing device.
10. The apparatus according to claim 9, wherein the erasing device is fixedly mounted in a printing machine, the printing form having a width, such that the jet is directed toward a portion of the surface of the printing form over the entire width thereof during a notary movement of the printing form underneath the erasing device.
11. The apparatus according to claim 9, comprising a cover, the at least one nozzle being mounted in the cover, the cover being open toward the printing form, the cover defining a work space and having another opening for discharging the medium introduced into the work space and the layer removed from the surface of the printing form.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEP4216636.5 | 1992-05-20 | ||
| DE4216636A DE4216636C2 (en) | 1992-05-20 | 1992-05-20 | Process and device for erasing and hydrophilizing a printing form imaged by means of a thermal transfer process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2096170A1 CA2096170A1 (en) | 1993-11-21 |
| CA2096170C true CA2096170C (en) | 1996-10-15 |
Family
ID=6459306
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002096170A Expired - Fee Related CA2096170C (en) | 1992-05-20 | 1993-05-13 | Method and apparatus for erasing the ink-carrying layer from the surface of an image-containing printing form |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0570879B1 (en) |
| JP (1) | JP3361145B2 (en) |
| CA (1) | CA2096170C (en) |
| DE (2) | DE4216636C2 (en) |
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|---|---|---|---|---|
| US5816161A (en) * | 1994-07-22 | 1998-10-06 | Man Roland Druckmaschinen Ag | Erasable printing plate having a smooth pore free metallic surface |
| DE4426012C2 (en) * | 1994-07-22 | 1998-05-20 | Roland Man Druckmasch | Erasable printing form, its use and methods for erasing and regenerating the printing form |
| DE4433834C1 (en) | 1994-09-22 | 1995-10-12 | Daimler Benz Ag | Recovering waste from synthetic diol-di:isocyanate adducts contg. non-glycolisable material, |
| US6631676B2 (en) * | 1995-02-07 | 2003-10-14 | Man Roland Druckmaschinen Ag | Process and apparatus for gravure |
| DE29507416U1 (en) | 1995-05-04 | 1995-07-06 | Roland Man Druckmasch | Device for cleaning ink transfer cylinders |
| DE19600844A1 (en) * | 1996-01-12 | 1997-07-17 | Heidelberger Druckmasch Ag | Cleaning device for directly produced printing formes |
| DE19600846C1 (en) * | 1996-01-12 | 1997-04-03 | Heidelberger Druckmasch Ag | Cleaning device for laser image printing plate |
| DE19624441C1 (en) * | 1996-06-19 | 1997-12-04 | Roland Man Druckmasch | Method and device for gravure printing using an erasable gravure form |
| DE19826377A1 (en) * | 1998-06-12 | 1999-12-16 | Heidelberger Druckmasch Ag | Printing press and printing process |
| IL124981A0 (en) * | 1998-06-17 | 1999-01-26 | Scitex Corp Ltd | A system and method for offset lithographic printing utilizing a reusable plate |
| DE19963124A1 (en) | 1999-12-24 | 2001-07-12 | Roland Man Druckmasch | Cleaning medium and its use |
| DE10037998A1 (en) * | 2000-08-04 | 2002-02-14 | Heidelberger Druckmasch Ag | Method and device for deleting a reimageable printing form |
| DE10054284B4 (en) * | 2000-11-02 | 2010-04-08 | Manroland Ag | Process for the treatment of an erasable lithographic printing plate |
| DE10206937A1 (en) * | 2002-02-19 | 2003-09-04 | Oce Printing Systems Gmbh | Method and device for printing, a wetting-promoting substance having a molecular layer thickness being applied before the application of a dampening solution |
| ITMI20031131A1 (en) * | 2003-06-05 | 2004-12-06 | Omet Srl | METHOD AND DEVICE FOR CLEANING A CYLINDER OF |
| DE102004006629B3 (en) * | 2004-02-10 | 2005-11-17 | Sundwig Gmbh | Device for cleaning the surface of cylindrical bodies, such as rollers or rollers |
| ITFI20040051A1 (en) | 2004-03-04 | 2004-06-04 | Perini Fabio | DEVICE, METHOD AND KIT FOR CLEANING ROLLS IN PRINTING MACHINES |
| DE102004028552A1 (en) * | 2004-06-15 | 2006-01-05 | Robo Paper B.V. | Drum cleaning station for paper adhesive coating assembly has a full-width suction cleaning assembly located in series with a spray |
| DE102015200114B4 (en) * | 2015-01-08 | 2018-12-20 | Koenig & Bauer Ag | Method for reusing a printing plate |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE260971C (en) * | 1912-05-25 | |||
| US2356771A (en) * | 1942-01-03 | 1944-08-29 | Rex V Mckinley | Stencil washing apparatus |
| DE1013667B (en) * | 1955-05-23 | 1957-08-14 | Jaenecke Schneemann K G Druckf | Device for cleaning pressure rollers |
| DE2539025A1 (en) * | 1974-09-02 | 1976-03-11 | Australia Res Lab | Re-usable lithographic printing surfaces prodn. - using electroscopic developer contg. resin which resists ink and is soluble in solvent |
| DE3248178A1 (en) * | 1982-12-27 | 1984-07-05 | Forschungsgesellschaft Druckmaschinen E.V., 6000 Frankfurt | IMAGE COATING OF PRINTING FORMS FOR FLAT PRINTING |
| DE3713801A1 (en) * | 1987-04-24 | 1988-11-10 | Forschungsgesellschaft Fuer Dr | Printing forme material for lithoprinting |
| DE4123959C1 (en) * | 1991-07-19 | 1993-02-04 | Man Roland Druckmaschinen Ag, 6050 Offenbach, De |
-
1992
- 1992-05-20 DE DE4216636A patent/DE4216636C2/en not_active Expired - Fee Related
-
1993
- 1993-05-13 CA CA002096170A patent/CA2096170C/en not_active Expired - Fee Related
- 1993-05-17 DE DE59304938T patent/DE59304938D1/en not_active Expired - Fee Related
- 1993-05-17 EP EP93107980A patent/EP0570879B1/en not_active Expired - Lifetime
- 1993-05-18 JP JP11554693A patent/JP3361145B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| EP0570879B1 (en) | 1997-01-02 |
| EP0570879A3 (en) | 1994-08-03 |
| DE4216636C2 (en) | 1995-11-23 |
| DE4216636A1 (en) | 1993-11-25 |
| EP0570879A2 (en) | 1993-11-24 |
| DE59304938D1 (en) | 1997-02-13 |
| JPH0647891A (en) | 1994-02-22 |
| JP3361145B2 (en) | 2003-01-07 |
| CA2096170A1 (en) | 1993-11-21 |
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| Date | Code | Title | Description |
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| EEER | Examination request | ||
| MKLA | Lapsed |