EP0114329B1 - Druckwerk mit elektrostatischer Druckhilfe - Google Patents

Druckwerk mit elektrostatischer Druckhilfe Download PDF

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Publication number
EP0114329B1
EP0114329B1 EP83112742A EP83112742A EP0114329B1 EP 0114329 B1 EP0114329 B1 EP 0114329B1 EP 83112742 A EP83112742 A EP 83112742A EP 83112742 A EP83112742 A EP 83112742A EP 0114329 B1 EP0114329 B1 EP 0114329B1
Authority
EP
European Patent Office
Prior art keywords
inductor
impression roller
tube
printing device
outer sheathing
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
Application number
EP83112742A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0114329A1 (de
Inventor
Walter Spengler
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to AT83112742T priority Critical patent/ATE25035T1/de
Publication of EP0114329A1 publication Critical patent/EP0114329A1/de
Application granted granted Critical
Publication of EP0114329B1 publication Critical patent/EP0114329B1/de
Expired legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F9/00—Rotary intaglio printing presses
    • B41F9/001—Heliostatic printing

Definitions

  • the invention relates to a printing unit, in particular a gravure printing device, with an electrostatic printing aid for supporting the ink transfer from a printing cylinder to a dielectric substrate web according to the preamble of patent claim 1 (GB-A-1 293 302).
  • an inductor device which has an elongated electrode carrier in which one or more rows of inductor electrodes are cast. These electrodes have tips protruding from the electrode carrier, which are aligned approximately parallel to the outer jacket layer along the impression roller and, when high voltage is applied, apply an electrostatic charge from the outside to the outer jacket layer consisting of a semiconductor material without contact and distribute it evenly over a desired layer width.
  • the charge-bearing layer section acts on the substrate web to be printed in such a way that the ink is applied to the substrate web from the engraving cups of the adjacent printing cylinder, even with a low contact pressure of the impression roller, in a much more uniform and high-contrast manner than with printing units without work with an electrostatic printing aid.
  • the use of the electrostatic printing aid has proven to be very useful, especially for low-quality papers that are considered difficult to print. It can be used to achieve impressive print results even when using inexpensive paper qualities. Noticeable energy savings can also be achieved when printing with an electrostatic printing aid, since a considerably lower pressure can be set for the ink transfer from the printing cylinder to the substrate web than without a printing aid; this also reduces wear on the printing unit. Press rollers that can be used in such printing devices are described, for example, in DE-A-28 10452.
  • the electrode carrier of the inductor device with longitudinally displaceable cover members, which act as an electrically insulating shield to protect the person with the electrostatic charge to make the circumferential section of the impression roller to be provided adjustable depending on the width of the substrate web to be printed.
  • the end faces of the impression roller with an insulating cover which prevents the charge from flowing laterally from the outer surface layer of the impression roller to the grounded roller bearing (CH-A-607624).
  • a proposal described in GB-A-1 293302 provides for conductor bars oriented along the impression roller to be inserted into the electrically insulating outer jacket layer.
  • the conductor bars which can be fed either from the inside of the roller via an outer brush arrangement or via an axial feed line, optionally extend over all or part of the length of the outer jacket layer. This makes it possible to preselect the desired position or the width of the electrostatically charged area of the impression roller surface.
  • the disadvantage here is that special leads must be provided for each group of conductor bars assigned to a specific width range, each of which must be insulated from one another and from ground for the operational high voltage.
  • the object of the invention is now to provide a printing unit of the type defined in the introduction, in which any impairment of the inductor device by the ink and solvent mist occurring during printing and the dust from the substrate web is excluded.
  • the inductor device is provided in the interior of the hollow cylindrical impression roller and is thus protected from any risk of contamination during the printing process.
  • the arrangement according to the invention of the inductor device in the interior of the impression roller it can be operated in an environment which is completely free of contaminants. This can also simplify the monitoring of the printing process itself.
  • the arrangement of the inductor device inside the impression roller furthermore offers advantageous protection against contact and low maintenance costs. For the Feeding the high voltage through one of the end bearing arrangements does not require any costly changes to the bearing, since only one feed hole has to be provided for the insertion of the central shaft region of the bearing journal which is otherwise not used.
  • a printing unit 1 includes a printing cylinder 2, which is immersed in an ink bath contained in an ink fountain 40.
  • the printing cylinder 2 When the printing cylinder 2 is rotated, it takes printing ink from the ink bath on its surface, which is wiped off by a doctor blade 41, so that only printing ink remains in the engraving cups on the surface of the printing cylinder.
  • the pressure cylinder 2 is rotated in the direction of arrow I by a drive (not shown) via a shaft 42.
  • a hollow cylindrical impression roller 4 which is shown in more detail in FIG. 2, is arranged above the impression cylinder 2 in FIG. 1.
  • the impression roller 4 is driven in the direction of arrow II, opposite to the direction of rotation of the impression cylinder 2.
  • a printing nip 6 is formed between the impression roller 4 and the printing cylinder 2, through which a substrate web 3 to be printed is passed.
  • the hollow cylindrical impression roller 4 shown in the figures has a multi-layer hollow cylinder wall structure 12.
  • a hollow cylinder 44 made of metal forms the supporting core of the impression roller 4.
  • the mentioned bearing journals 43 are fitted, on which the The impression roller is rotatably guided and supported in its bearing arrangements 10.
  • the hollow cylinder 44 On its outer surface, the hollow cylinder 44 has a jacket 48 made of an electrical insulating material with a high dielectric constant.
  • an electrostatically chargeable outer jacket layer 5 is applied, which consists of a semiconductor material. When the impression roller 4 is used, this outer jacket layer 5 comes into direct contact with the substrate web surface facing it in the manner shown in FIG. 1.
  • this outer cladding layer it is therefore expedient for this outer cladding layer to choose a highly abrasion-resistant material with semiconductor properties which has sufficient elasticity to meet the pressure requirements in the pressure gap 6.
  • a polyurethane can be used for the outer jacket layer, which is also referred to as “cover” in impression rollers.
  • the wall structure 12 also includes additional layers or segments, the structure and function of which will be described in detail. It goes without saying that all layers, layers or segments of the hollow cylinder wall structure are firmly connected to one another, so that detachment of the layers during operation is impossible in any case.
  • an inductor device 7 is provided in the interior 8 of the hollow cylindrical impression roller 4.
  • this inductor device 7 each has an inductor ring member 14, to which an inductor ring 19, which is mounted on a tube 18 guided concentrically in the interior 8, is assigned.
  • Each of the three inductor ring members 14 visible in FIG. 2 has an annular electrode carrier 15, preferably made of a casting resin, which is enclosed by two annular side boundaries 37 (cf. FIG. 3). Approximately midway between the side boundaries 37, a plurality of electrodes 16 lie one behind the other in a row in the circumferential direction of the impression roller 4 and in about the same distances over the circumference of the ring member 14 (see FIG. 1) embedded.
  • Electrodes 16 are insulated from the hollow cylinder 44 from metal with high voltage resistance by the casting resin and each carry an electrode tip 17 on the inner circumferential area of the annular electrode carrier 15. All electrode tips 17 of the electrodes 16 embedded in an electrode carrier 15 end at one concentric with the axis of rotation R of the impression roller 4 Imaginary circle K.
  • a conductor 13 is connected to each electrode 16, which is passed through a radial bore 38 that breaks through the hollow cylinder 44 in an insulated manner and is fastened to a layer underside 21 of the electrostatically chargeable outer jacket layer 5 via a contact point 20.
  • the line means 13 which can be designed as a thin wire, an electrical coupling element 49, z. B.
  • the electrode 16 can be designed as a simple connection and guide sleeve for the electrode tip 17, but also as a high-voltage switching element which can be operated by remote control in various known ways. With a design as a switching element, it would be possible, depending on the desired conditions of use, to switch off a few electrodes from a row in series from their associated line means 13.
  • the annular electrode carrier 15 is placed with its outer circumferential surface directly on the wall inner surface 11 of the hollow cylinder 44, which encloses the interior 8 of the impression roller 4, and is fastened there. It would also be possible, as indicated in FIG. 2, to coat the hollow cylinder 44 made of metal on its surface facing the interior 8 with an inner insulation material layer 50 and to apply the electrode carrier (s) 15 thereon.
  • the tube 18 extends concentrically through the impression roller 4 and is guided at its two end portions in the journal 43 of the bearing arrangement 10, so that it is rotatable relative to the impression roller 4 and axially displaceable.
  • the tube 18 carries a plurality of inductor rings 19, each of which is connected to a high-voltage feed 9, which is introduced through the interior of the tube 18 from outside the impression roller 4.
  • the tube 18 can be made of insulating material, and the inductor rings 19 can be made of a metallic material that can be cadmium-coated for reasons of corrosion resistance and resistance to electrolytic removal.
  • the inductor rings 19 are connected to the high-voltage feed 9, and certain adjacent inductor rings can be moved in and out again by axially displacing the tube 18 into the circles of certain inductor ring members 14 formed by the electrode tips 17. If the axial distribution of the inductor rings 19 takes place on the shaft 18, as indicated in FIG. 2, and all the inductor rings 19 are connected to the high-voltage supply 9, there is an inductor ring 19 in each of the three inductor ring members 14 within the circle K such that their outer ring surfaces take the shortest possible distance from the respective electrode tips 17. In this position, as shown in FIG.
  • the further inductor rings 19, which are also under high voltage, are located somewhat outside the area of the relevant inductor ring member 14 which is delimited by the annular side boundaries 37.
  • the annular side boundaries 37 can advantageously be drawn radially inwards towards the tube 18 at least up to the circle K occupied by the electrode tips, as a result of which the electrode tips 17 of an inductor ring member 14 are shielded from voltage induction from adjacent inductor rings.
  • the inductor rings 19 on the tube 18 shown in FIG. 2 were to be shifted towards the right side of the drawing until the next inductor ring on the tube is again within the circles K formed by the electrode tips 17, there would only be two, namely 2, the inductor rings 19 are located in the right inductor ring members 14, while the electrode tips 17 in the left inductor ring member 14 only face the insulated surface of the tube 18. In this position, the high voltage can be induced via the high voltage supply 9 only on the two inductor ring members 14 on the right in FIG. 2. If one were to make a further axial displacement in the same direction, ie to the right in FIG.
  • the leftmost inductor ring 19 in the drawing would be opposite the electrode tips 17 of the left inductor ring member 14 during the two right inductor ring members would face the insulated surface of tube 18.
  • the described selection of the axial positions of the respective inductor rings 19 relative to the inductor ring members 14 makes it clear which combination principle allows the further switching variants between the three inductor ring members shown and also between a larger number of inductor ring members, for example in the case of long impression rollers. It would also be possible to provide circuit means on the tube 18 or within the tube, which the or some inductor rings 19 from the high Switch off the voltage depending on the desired operating conditions.
  • an end section 25 of the tube 18, advantageously at the end receiving the high-voltage supply 9, projects axially out of one of the bearing arrangements 10 and is provided with markings 27 make the respectively set position of the inductor rings 19 visible at a fixed mark 28 (FIG. 2). This enables the desired switching on or off of a specific inductor ring member 14 in the interior 8 of the impression roller 4 in an extremely simple manner.
  • the storage or guidance of the tube 18 in the bearing pin 43 of the impression roller 4 can be designed such that both axial ends of the tube 18 are open to the outside of the impression roller. It is preferred, however, that only the high-voltage supply side of the bearing pin 43 on the right in FIG. 2 has a guide which completely penetrates the pin, while the left end of the bearing pin 43 in FIG. 2 is sealed off from the interior 8 of the impression roller 4.
  • an explosion-proof sealing packing 26 is attached between the bearing arrangement 10 and the end section 25 of the tube 18 protruding therefrom for the pressure-tight sealing of the interior 8 of the impression roller 4.
  • Such a sealing packing must be able to withstand an overpressure to be built up in the interior 8 according to the applicable explosion protection regulations or to be able to seal an inert gas atmosphere which may be present in the interior. So that when maintenance becomes necessary on the impression roller or inductor device 7, the tube 18 equipped with the inductor rings 19 can easily be pulled out of the interior 8 of the impression roller 4, it is also advantageous if the largest diameter on the equipped tube is smaller than the clear width of the axial pipe guide in the bearing pin 43.
  • the already described hollow cylinder wall structure 12 with its at least two outer shells, the insulation sheath 48 and the outer sheath layer 5 made of semiconductor material, can be modified for different uses of the impression roller 4.
  • a two-layer wall structure 12 is shown in FIG. 4.
  • the line means 13 guided through the radial bores 38 are each directly connected to the underside 21 of the outer jacket layer 5 via contact points 20.
  • These contact points 20 can be arranged one behind the other in the circumferential direction of the impression roller, without having a direct conductive connection to one another, or can be connected by a ring conductor 22 shown in FIG. 1. If an inductor ring member 14 shown in FIGS. 1 to 3 is induced in a hollow body wall structure 12 according to FIG.
  • a row of contact points 20 lying one behind the other in the direction of rotation of the impression roller thus enables an annular charge zone to be formed on the outer jacket layer 5, which is indicated by one of the ring segment-shaped peripheral surface sections 36 in FIG. 4.
  • the area of the impression roller lying outside such a surface section remains essentially free of electrostatic charge. If one would like (in a two-layer structure) to provide several surface areas 36 of the outer jacket layer 5 with electrostatic charge at the same time, several segments can be provided in the axial direction, for example as shown in FIG.
  • Another possibility for electrostatic charge distribution on certain circumferential surface sections of the impression roller consists, in addition to the application of transverse lines, as mentioned, in the ring-shaped arrangement of conductors 22 shown on FIG. 1 on the underside 21 of the outer jacket layer 5.
  • Such conductors 22, like the aforementioned one Transverse conductors can be made of wire, conductor layers, conductor tracks, conductive coatings and the like.
  • the hollow cylinder wall structure 12 comprises three outer layers, that is to say that a conductor layer 24, as shown in FIG. 3, is applied to the jacket 48 made of electrical insulating material and covering the metal hollow cylinder 44, and the outer jacket layer 5 made of semiconductor material is in turn applied thereon. All contact points 20 of the line means 13 could be connected to this conductor layer 24. This would transfer the charge uniformly to the entire outer jacket layer.
  • the conductor layer 24 can be divided into three conductor strips 23, as shown in FIG. 2. Each of these conductor strips 23 is connected to the electrodes 16 or the line means 13 of one of the three inductor ring members 14, which are located in the interior 8 of the impression roller 4.
  • all three conductor strips 23 can release their charge to the outer jacket layer when high voltage is applied to all inductor ring members 14. So that a uniform charge distribution takes place over the entire width on the one hand when operating all the inductor ring members 14 provided and on the other hand when inducing high voltage on one or more but not all inductor ring members it is ensured that only the conductor strips 23 supplied with voltage in each case have the desired peripheral surface section of the outer jacket layer 5 charge, a distance A must be provided between adjacent edges of the conductor strips 23 such that an optimal compromise can be made between all possible operating modes, taking into account relevant material and voltage values.
  • the conductor strips 23 in the three-layer hollow cylinder wall structure 12 according to FIG. 2 are subdivided in the axial direction of the impression roller 4, so that, as shown in the lower part of FIG. 1, a row of circumferential sectors 58 lying one behind the other in the running direction of the roller is formed .
  • the distance between adjacent circumferential sectors 58 can correspond to the distance A between conductor strips 23 in FIG. 2.
  • This hollow cylinder wall structure is particularly suitable for electrostatic charging of a mainly transverse field on the outer jacket layer 5, i. H. a field extending over one or more axially adjacent rows or rows of circumferential sectors 58, while the remaining circumference of the impression roller 4 can remain essentially free of charge.
  • FIG. 3b shows a schematic view of the variant according to FIG. 3a seen in the direction of the arrow 3b drawn there.
  • the inductor ring 19 explained with reference to FIG. 3 consists of at least one inductor ring segment 51 which, as shown in FIG. 3b, is only provided on part of the circumference of the tube 18.
  • the remaining peripheral region of the inductor ring 19 consists of insulating material, preferably that of the tube 18.
  • the inductor ring segment 51 has a width in the axial direction of the tube 18 which corresponds approximately to the width of the inductor ring 19 according to FIG.
  • each inductor ring segment 51 is connected to the high-voltage feed 9.
  • the ring segments 51 are also axially displaceable by means of the tube 18 and their relative position, as described with reference to the embodiment according to FIG. 3, is displayed outside the impression roller 4. If there are several inductor ring segments 51 on the tube 18, they are arranged in alignment with one another in the axial direction of the tube.
  • the ring segments 51 on the tube 18 mainly electrostatically charge the section of the outer jacket layer 5 of the impression roller 4 that is located in the vicinity of the pressure gap 6, the ring segments 51 are aligned with those electrodes 16 or their electrode tips 17 that are located in the vicinity of the pressure gap 6 are located or move into it.
  • the ring segments 51 which are aligned in a row on the tube 18 could be arranged at the point X in FIG.
  • the tube 18 carrying the ring segments 51 can be rotated relative to the impression roller.
  • the end portion 25 of the tube 18 which, as in FIG. 2 shown, axially led out on one of the bearing arrangements 10, is also suitable for a targeted rotation of the tube 18 and thus for adjusting the angle of rotation of the ring segments 51, for. B. in relation to the center of the pressure gap 6.
  • a graduation is applied to the protruding end section 25 of the tube 18, as shown in FIG. 2, which reproduces the respective rotary position of the ring segments 51 via a fixed rotary position marker 53.
  • the embodiment of a hollow cylindrical impression roller 4 with electrostatic pressure aid shown in FIG. 4 has, as mentioned, a two-layer outer jacket on the hollow cylinder 44.
  • the jacket 48 made of electrical insulating material is led down over the end faces of the bearing pin 43 in order to drain off at the edge to exclude the charge from the electrostatically chargeable outer jacket layer 5 to the grounded mounting arrangement 10.
  • the particular design and the extent to which the insulating jacket 48 is pulled down over the end faces of the impression roller depends on the operational high voltage values and the materials selected.
  • the hollow cylinder 44 is provided with an inner surface insulation 50 corresponding to the jacket 48, so that the wall surface 11 surrounding the interior 8 is formed from the inside of the insulation 50.
  • the inductor device 7 is formed by an inductor disk member 31 which has a circular electrode carrier 32, in which a plurality of electrodes 33 are embedded, insulated in a circumferential direction and insulated from high voltage.
  • the electrode tips 17 oriented towards the axis of rotation R of the impression roller 4 in the embodiment according to FIGS. 1 to 3 are arranged toward the outside of the axis of rotation R towards the inside wall 11 in the embodiment according to FIG. 4 and form the electrode tips 34.
  • These electrode tips 34 lie on an imaginary circle K 'concentric with the inner wall surface 11.
  • the inductor disc member 31 is non-rotatably seated on a hollow shaft 30 which, similar to the tube 18, is made of insulating material.
  • the high-voltage feed 9 is passed through the hollow shaft 30 to the electrodes 33.
  • electrical coupling elements 49 are electrical coupling elements 49.
  • a row of contact elements 35 is attached all the way around in the direction of rotation of the impression roller 4, which contact elements 13 lead into the outer jacket layer 5 through the radial holes 38 in the jacket 48 Connect.
  • These contact elements 35 can be attached as closed rings, which are made of a similar material to the inductor rings 19, concentrically along the inner surface insulation 50 and can connect several or all of the line means 13, which lie in a radial plane, to one another. As indicated in FIG.
  • the two-layer wall structure 12 of the impression roller 4 according to FIG. 4 is advantageously suitable for the construction of electrostatic charge zones in the vicinity of the respective contact points 20 on the underside 21 of the outer jacket layer 5, which, depending on the type of semiconductor material used and the induced voltage, have more or less large charge zones can provide.
  • the charge distribution in these zones decreases, starting from the respective contact point, so that practically sections of low to very small charge are formed between adjacent charge zones.
  • These zones represent a kind of charge grid structure in the running and axial directions of the impression roller.
  • a plurality of electrodes 33 of an inductor disk member 31 are provided in a segment 54 of the disk member.
  • This segment which can also be designed so that the part of the inductor disc member which is not equipped with the electrodes is omitted, is in the interior 8 of the hollow cylindrical impression roller 4 to those cones Aligned clock elements 35, which each transfer the charge to the section of the outer jacket layer 5 located in the vicinity of the pressure gap 6.
  • all segments 54 are arranged in alignment with one another in the axial direction of the shaft.
  • the simultaneous induction in the axial direction via the electrodes 33 results in a corresponding charge distribution on the outer cladding layer 5.
  • the high-voltage-supplying section formed by the respective disk link segment 54 preferably comprises a segment angle ⁇ of approximately 90 ° to 120 °.
  • the high voltage 9 is supplied, as in the embodiment according to FIG. 4, through the hollow shaft 30.
  • the hollow shaft 30 is off on it of the bearing arrangement 10 projecting section 55 with a graduation 56 (FIG. 4), which makes the respective position of the segment 54 visible at a suitable fixed rotational position marking 57.
  • This adjustability of the segments 54 allows a change in the width of the cargo area on the outer jacket in the running direction, with respect to the printing nip, even when the printing unit is running, thereby reducing the printing quality. can be made or corrected.
  • the outer jacket layer changes in accordance with the diameter of the impression roller, the optimum number of radial bores must also be determined for each diameter. At least four and a maximum of twelve radial bores 38 distributed over the circumference are provided lying in a radial plane for the impression rollers currently used.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rotary Presses (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Printing Methods (AREA)
  • Rolls And Other Rotary Bodies (AREA)
  • Paper Feeding For Electrophotography (AREA)
  • Printers Or Recording Devices Using Electromagnetic And Radiation Means (AREA)
  • Ultra Sonic Daignosis Equipment (AREA)
  • Medicines Containing Antibodies Or Antigens For Use As Internal Diagnostic Agents (AREA)
  • Microscoopes, Condenser (AREA)
EP83112742A 1982-12-27 1983-12-17 Druckwerk mit elektrostatischer Druckhilfe Expired EP0114329B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83112742T ATE25035T1 (de) 1982-12-27 1983-12-17 Druckwerk mit elektrostatischer druckhilfe.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH756782 1982-12-27
CH7567/82 1982-12-27

Publications (2)

Publication Number Publication Date
EP0114329A1 EP0114329A1 (de) 1984-08-01
EP0114329B1 true EP0114329B1 (de) 1987-01-21

Family

ID=4327175

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83112742A Expired EP0114329B1 (de) 1982-12-27 1983-12-17 Druckwerk mit elektrostatischer Druckhilfe

Country Status (5)

Country Link
EP (1) EP0114329B1 (enrdf_load_stackoverflow)
JP (1) JPS59171653A (enrdf_load_stackoverflow)
AT (1) ATE25035T1 (enrdf_load_stackoverflow)
DE (1) DE3369280D1 (enrdf_load_stackoverflow)
FI (1) FI72929C (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4401332A1 (de) * 1994-01-18 1995-07-20 Roland Man Druckmasch Verfahren und Vorrichtung zum Füllen von Vertiefungen, wie Näpfchen oder Rillen, auf der Mantelfläche eines rotierenden, zylindrischen Körpers

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1395339B1 (it) * 2009-04-10 2012-09-14 Ace Di Barbui Davide & Figli S R L Apparecchiatura di assistenza elettrostatica per la stampa rotocalco, con caricamento parzializzato del pressore.

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH607624A5 (en) * 1976-05-14 1978-09-29 Walter Spengler Printer with electrostatic printing ink transfer onto a dielectric substrate

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2084968A (en) * 1937-03-03 1937-06-22 Chapman Electric Neutralizer C Neutralizing apparatus
GB1293302A (en) * 1971-01-14 1972-10-18 Polygraph Leipzig Electrostatic impression cylinder
JPS54121809A (en) * 1978-03-08 1979-09-21 Hurletronaltair Inc Ink transfer assistant device
DE2810452A1 (de) * 1978-03-10 1979-09-13 Hurletronaltair Inc Druckeinrichtung

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH607624A5 (en) * 1976-05-14 1978-09-29 Walter Spengler Printer with electrostatic printing ink transfer onto a dielectric substrate

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4401332A1 (de) * 1994-01-18 1995-07-20 Roland Man Druckmasch Verfahren und Vorrichtung zum Füllen von Vertiefungen, wie Näpfchen oder Rillen, auf der Mantelfläche eines rotierenden, zylindrischen Körpers

Also Published As

Publication number Publication date
EP0114329A1 (de) 1984-08-01
ATE25035T1 (de) 1987-02-15
DE3369280D1 (en) 1987-02-26
FI72929C (fi) 1987-08-10
FI834694L (fi) 1984-06-28
JPH0377783B2 (enrdf_load_stackoverflow) 1991-12-11
JPS59171653A (ja) 1984-09-28
FI834694A0 (fi) 1983-12-20
FI72929B (fi) 1987-04-30

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